Environment
Browse 60 curated documents about environment in The Archive — the 2RA-Edition digital library for engineering and scientific research. This collection of books, journal articles, theses, reports, and technical documents on environment spans extractive metallurgy, mining engineering, chemistry, and applied science. Every document is searchable in full text; sign in to read, download, ask AI questions about any document, or generate cited research drafts with the AI Researcher.
ETUDE DES IMPACTS DES ELEMENTS TOXIQUES ISSUES DES OPERATIONS MINIERES SUR L’ENVIRONNEMENT. Cas de la mine de Kamfundwa
KUTEMBA SARAH Ange, NGOY BIYUKALEZA BILEZ
La mine à ciel ouvert de Kamfundwa, exploitée par la Gécamines dans la ceinture cuprifère katangaise, est analysée dans le contexte d'une demande internationale croissante en cuivre et en cobalt. L'objectif de cette étude est d'évaluer comment les opérations d'exploitation minière à Kamfundwa libèrent des éléments toxiques et leurs impacts sur l'air, l'eau, le sol et la végétation environnants. La
Structural model of arsenic(III) adsorbed on gibbsite based on DFT calculations
Augusto F. Oliveira, Ana Cla´udia Q. Ladeira
This study investigates the adsorption behavior of As(III) on gibbsite (g-Al(OH)3), focusing on the mechanisms governing this process. The mobility of arsenic species in the environment, particularly As(III), poses significant concerns, as its adsorption behavior contradicts its high mobility. To understand this discrepancy, density functional theory (DFT) calculations were employed to analyze two
Novel extractant impregnated resin for preconcentration and determination of uranium from environmental samples
Sandesh R. Tetgure, Bharat C. Choudhary
A novel method based on impregnation of Amberlite XAD-4 with extractant isonitroso-4-methyl-2-pentanone (IMP) has been developed for U 6+ extraction and determination in various samples. The prepared extractant impregnated resin (EIR) sorbent was characterized by several techniques including the field emission scanning electron microscope. The sorbent was packed in a glass column and investigated
Environmental and Geometrical Conditions to Sustain Crevice Corrosion in Alloy 22
R. M. Carranza, M. A. Rodríguez
Alloy 22 (N06022) is highly resistant to localized corrosion. Under aggressive environmental conditions, Alloy 22 may be susceptible to crevice corrosion in hot chloride (Cl-) solutions. The objective of the present work was to explore the environmental and geometrical conditions for crevice corrosion to occur. Electrochemical tests were performed using PCA and prismatic mill annealed Alloy 22 spe
Advanced Process Modeling at the BCL Smelter: Improving Economic and Environmental Performance
Nagendra Tripathi, Edgar Peek
Since 1973, Bamangwato Concessions Limited (BCL) has operated a nickel-copper smelter in Selebi-Phikwe, Botswana, treating concentrates from local and custom feed mines. The objective of this study was to improve economic and environmental performance by identifying key economic drivers to maximize revenue at the BCL smelter. We collaborated with Xstrata Process Support (XPS), which developed adva
Nanomaterials for Renewable Energy Overview
Fernand D.S. Marquis
The growing global energy demand is alarming, primarily fueled by the consumption of fossil fuels, whose reserves are rapidly depleting and becoming increasingly costly. This situation has led to unacceptable levels of greenhouse gas emissions, necessitating a coherent global energy strategy to address energy harvesting, storage, conversion, and distribution. This paper investigates the role of hy
é t é icos al ed mo n e l zepaT[ le i tned i f n o C
ALELOB AK, yzalB
L'analyse des substances chimiques utilisées dans le milieu environnemental est cruciale pour comprendre leur impact sur la santé et l'écosystème. Cet article vise à évaluer les effets d'une exposition prolongée à divers contaminants chimiques, en tenant compte des spécificités des produits analysés. La méthodologie employée comprend des tests de toxicité, des mesures de concentration dans l'air e
Top-Blowing, Bottom-Stirring Process for Producing Blister Copper
Samuel W. Marcuson, Carlos Diaz
Reduction of sulfur dioxide emissions has been a continuous endeavor in the copper smelting industry, particularly during the transition from the 1970s to the 1990s at Inco's Ontario Division. This study aims to present the development and operational outcomes of a novel oxygen top-blowing and nitrogen bottom-stirring process for producing blister copper. The methodology included an extensive rese
Improving Environmental Protection as a Result of Non-ferrous Metallurgy Industry Waste Recycling
Khojiev Sh.T.
This study examines the significant environmental challenges posed by the non-ferrous metallurgy industry, particularly focusing on the recycling of copper slag produced during pyrometallurgical processes. The objective is to evaluate the potential for improving environmental protection through effective waste management strategies. Methodologically, the research analyzes the composition of copper
Valorisation et Recyclage des Dechets Pl
Benimam Samir, Debieb Farid
La valorisation des déchets plastiques dans le béton est une pratique importante dans le génie civil, étant donné qu'elle n'est pas soumise à des critères de qualité rigoureux. Cette étude vise à évaluer l'impact de l'incorporation de déchets plastiques dans le béton, tant sur le plan environnemental qu'économique. Trois types de déchets plastiques, introduits sous forme de grains et de fibres, on
Le recyclage vers une approche ethique d
Claire LARROQUE
L’article se propose d’étudier le recyclage comme réponse au problème des déchets issus des sociétés industrielles. Après avoir fondé le problème environnemental lié aux déchets contemporains, l’article examine la solution technique qu’est le recyclage. Il analyse dans quelle mesure le recyclage peut remédier au problème environnemental lié aux nouvelles caractéristiques des déchets. Il envisage,
Gestion des dechets d equipements electr
Diomaye DIENG, Cheikh DIOP
La gestion des Déchets d’Equipements Electriques et Electroniques (DEEE) est un défi pour le Sénégal. Leur quantité augmente rapidement et leur gestion informelle expose l’environnement et les acteurs aux risques liés aux substances toxiques qu’ils contiennent. L’étude vise à déterminer les caractéristiques des acteurs impliqués dans la gestion des DEEE et leur connaissance des dangers des composa
From Waste to Resource: Critical Mineral Recovery and Environmental Impact Mitigation in Copper Smelting Slag
Aleksandar N. Nikoloski, Pritam Singh
Copper and cobalt are critically important metals for the transition to renewable energy and various aspects of modern life. Their production from primary sources, ores, necessitates metallurgical separation from the unwanted host materials, resulting in the generation of a huge amount of waste. Copper smelting slag is one of these metallurgical wastes, with 39 million tonnes of slag generated and
Gold Recovery Beyond Ores: Sources, Processes, Challenges, and Prospects
Jovana Djoki´ c, Stefan Nikoli´ c
Gold (Au) is a strategically critical metal whose technological relevance and increasing demand contrast with the long-term decline in primary ore grades. This review discusses gold recovery from primary ores providing the metallurgical and technological baseline for the comparative evaluation of unconventional Au-bearing resources. Emphasis is placed on electronic waste and copper anode slimes as
New strategy for recovering Pb, Fe, and Zn from blast furnace dust and zinc oxide via ammonia-acid co-leaching
Shaoxiang Yang, Jiayu Feng
Zinc-containing solid wastes (ZCSW) from the steel industry pose significant environmental risks due to hazardous heavy metals like zinc, iron, and lead. This study proposes a synergistic ammonia-acid leaching strategy for co-processing blast furnace dust (BFD) and secondary zinc oxide (SZO) to achieve resource recovery and pollution mitigation. The ammonia leaching selectively extracted 70.62–88.
ELECTRIC ARC SMELTING: Airborne Emissions from Mn Ferroalloy Production
IDA TERESIA KERO, PER ANDERS EIDEM
Airborne emissions from metal production represent a health, safety, and environmental challenge to which more and more attention is being directed. The objective of this article is to summarize current knowledge in a state-of-the-art overview aimed at introducing fresh industry engineers and academic researchers to the technological aspects relevant to the reduction of airborne emissions from man
Speciation of uranium: Compilation of a thermodynamic database and its experimental evaluation using different analytical techniques
Elena L. Mühr-Ebert, Frank Wagner
Environmental hazards are caused by uranium mining legacies and enhanced radioactivity in utilized groundwater and surface water resources. Knowledge of uranium speciation in these waters is essential for predicting radionuclide migration and for installing effective water purification technology. The validity of the thermodynamic data for the environmental media affected by uranium mining legacie
Phosphogypsum and clay mineral/phosphogypsum ceramic composites as useful adsorbents for uranium uptake
Marcin D. Syczewski, Andrzej Borkowski
We analyzed the sorption capacity of phosphogypsum and clay mineral-based ceramic composites. Phosphogypsum is a waste by-product generated from apatite in the production process of phosphoric acid and phosphate fertilizers. On the one hand, the chemical composition of phosphogypsum poses a considerable problem to production plants due to its acidic properties. On the other hand, phosphogypsum can
Bacterial interactions with uranium: An environmental perspective
Mohamed L. Merroun, Sonja Selenska-Pobell
The presence of actinides in radioactive wastes is a significant environmental concern due to their potential for migration from repositories and long-term contamination. This study evaluates the interactions between bacteria and uranium through various mechanisms such as biosorption, intracellular accumulation, precipitation, and redox transformations. Utilizing a multidisciplinary approach, we h
Speciation of dissolved chromium and the mechanisms controlling its concentration in natural water
Sulistyo Saputro, Kazuhisa Yoshimura
The circulation of chromium at naturally occurring concentration levels (i.e., 1μgd m−3 or lower) was examined using solid-phase spectrophotometry and inductively coupled plasma-mass spectrophotometry (ICP-MS) to determine the Cr(VI) and Cr(Total) concentrations, respectively. Natural water and stream sediments were collected from areas with various types of geologic features, such as metamorphic
Review of Methods for Obtaining Rare Earth Elements from Recycling and Their Impact on the Environment and Human Health
Despina A. Gkika, Michail Chalaris
Rare earth elements (REEs) are at the forefront of discussions, given their crucial role in cutting-edge and eco-friendly innovations that propel the industrial revolution towards a green economy. These elements have become indispensable to various modern technologies, such as smartphones, electronic devices, and renewable energy sources. Many different concepts and analyses have been introduced,
High efficiency rare earth element bioleaching with systems biology guided engineering of Gluconobacter oxydans
Alexa M. Schmitz, Brooke Pian
Biological methods are a promising route for the environmentally-friendly production of rare earth elements (REE), which are essential for sustainable energy and defense technologies. In this study, we aimed to enhance the REE-bioleaching capability of Gluconobacter oxydans by targeting key genetic mechanisms identified in previous research. The methodology involved the clean deletion of the phosp
DTPA-Assisted Selective Leaching of Mo, Co, Ni, and Al from Spent Hydrodesulfurization Catalysts
FERIDE N. TU¨ RK, HASAN ARSLANOG˘LU
The extraction of cobalt (Co), nickel (Ni), molybdenum (Mo), and aluminum (Al) from an alumina-supported hydrodesulfurization (HDS) spent catalyst was examined using diethylene triamine pentaacetic acid (DTPA) as a chelating agent. To assess the impact of different metals on leaching efficiency, a roasting pretreatment was performed on powdered catalyst samples at various temperatures (300–700 °C)
Bioleaching of Gold in Mine Tailings by Alcaligenes faecalis
Yilman S. Pineda, Stephanie L. Devries
We conducted a series of column experiments on tailing heap samples from the Picacho mine in California to determine the ability of the native Gram-negative bacteria, Alcaligenes faecalis, to leach gold. To mimic heap leaching using our technique, unprocessed and unsorted tailings of mixed grain sizes were placed into columns and leached for three weeks with four treatments: (1) deionized water, (
Copper Recovery and Reduction of Environmental Loading from Mine Tailings by High-Pressure Leaching and SX-EW Process
Labone L. Godirilwe, Kazutoshi Haga
The flotation tailings obtained from Bor Copper Mine contain pyrite (FeS2) and chalcopyrite (CuFeS2), these sulfide minerals are known to promote acid mine drainage (AMD) which poses a serious threat to the environment and human health. This study focuses on the treatment of mine tailings to convert the AMD supporting minerals to more stable forms, while simultaneously valorizing the mine tailings
Pretreatment options for the recycling of spent lithium-ion batteries: A comprehensive review
Dawei Yu, Zhu Huang
The production of lithium-ion batteries (LIBs) is increasing rapidly because of their outstanding physicochemical properties, which ultimately leads to an increasing amount of spent lithium-ion batteries reaching their end-of-life (EOL). Pretreatment of the discarded batteries is an indispensable part of recycling spent lithium-ion batteries. The batteries contain toxic chemicals and high-value me
Design and Fabricate a Continuous Pork Roaster using Infrared Heating
Teerapot Wessapan, Theerapong Borirak
Roasted pork is a beloved dish across various cultures, yet the traditional roasting process can contribute significantly to environmental pollution through carbon dioxide and particulate emissions. This research aims to design and fabricate a continuous pork roaster employing infrared heating technology, intended for community enterprises, while ensuring efficiency and capacity within acceptable
HYDROCOPPER® FOR TREATING VARIABLE COPPER CONCENTRATES
L. Haavanlammi, K. Hietala
The Outokumpu HydroCopper® process is a chloride based atmospheric leaching process alternative that can treat a variety of different concentrates. Chalcopyrite and other copper sulfides can effectively be leached under atmospheric pressure in strong, aggressive chloride solution using copper (II) ions as oxidant. Impurities are removed from the solution as carbonates and ion exchange. Copper is p
Solution Mining A review
D. D. Rabb
This paper discusses solution mining, a method originally defined for the dissolution of soluble salts, which has evolved to encompass various techniques including heap leaching and in-place leaching. The objective is to review the expanded definition and application of solution mining, particularly for low-grade minerals and waste recovery. The methodology involves analyzing the chemical processe
Recovery and Utilization of Metallurgical Solid Waste
Yingyi Zhang
At present, a lot of metallurgical solid wastes have not been timely and effectively recycled, resulting in serious problems of environmental pollution and waste of resources. This book aims to address this issue by providing a comprehensive overview of comprehensive utilization technologies for metallurgical solid waste, including slag dry granulation, steel slag cement production, slag wool tech
Powering battery sustainability: a review of the recent progress and evolving challenges in recycling lithium-ion batteries
Panni Zheng, David Young
The global consumption of lithium-ion batteries (LIBs) has surged, presenting significant sustainability challenges related to their recycling and disposal. This review aims to synthesize recent progress in recycling technologies and to address the evolving challenges associated with lithium-ion battery waste. A comprehensive analysis of current recycling methods is conducted, highlighting advance
Extraction and Recovery of Metals from Spent HDS Catalysts: Lab- and Pilot-Scale Results of the Overall Process
Nertil Xhaferaj, Francesco Ferella
The present study proposes an overall recycling process for spent hydrodesulfurization (HDS) catalysts. The process put together stages already known in the technical literature, tested again with samples coming from the roasting stage in a pilot kiln, which is the most limiting stage of metal recovery from spent catalysts. These catalysts contain valuable metals such as cobalt (Co), molybdenum (M
Industrial Application of Large Rotary Kiln for Recovery of Vanadium from Vanadium Slag Added MnVO4 in Calcium Roasting Process
Jin WANG, Shaodong WANG
Calcification roasting has emerged as an effective and environmentally friendly method for extracting vanadium from vanadium slag. This study aims to examine the industrial application of a calcium roasting process in a large rotary kiln, emphasizing the role of manganese vanadate (MnVO4) in enhancing vanadium recovery. Methodologically, the research outlines the optimal conditions that enable rec
Effect of White Mud Addition on Desulfurization Rate of Molten Steel
TAE SU JEONG, MIN KYO OH
Fluorspar (CaF2) is commonly used to control the fluidity of slag in ladle-refining of steel. However, because it is desirable to reduce CaF2 consumption due to its environmental impacts, the industrial waste material such as white mud (WM) was investigated as a potential substitute for fluorspar. Steel samples were melted in a high-frequency induction furnace, followed by additions of ladle slag
End-of-Life Vehicle (ELV) Recycling: An international comparative study of end-of-life vehicle (ELV) recycling systems
Shin-ichi Sakai, Hideto Yoshida
End-of-life vehicles (ELV) have become a global concern as automobiles have become popular worldwide. An international workshop was held to gather data and to discuss 3R policies and ELV recycling systems, their background and present situation, outcomes of related policies and programs, the framework of recycling and waste management, and case studies on related topics in several countries and re
Unveiling the Bioleaching Versatility of Acidithiobacillus ferrooxidans
Luca Tonietti, Mattia Esposito
This study explores the bioleaching capabilities of Acidithiobacillus ferrooxidans, a bacterium known for its role in biohydrometallurgy. The objective was to investigate its versatility in metal recovery from various substrates. Utilizing a series of experimental setups, isolated strains of Acidithiobacillus ferrooxidans were subjected to different environmental conditions to assess their efficie
Advances in bioleaching of waste lithium batteries under metal ion stress
Xu Zhang, Hongjie Shi
In modern societies, the accumulation of vast amounts of waste Li-ion batteries (WLIBs) is a grave concern. Bioleaching has great potential for the economic recovery of valuable metals from various electronic wastes and has been successfully applied in mining on commercial scales. This review summarizes the advances in bioleaching of WLIBs, focusing on the effects of high concentrations of heavy m
Bioleaching Techniques for Sustainable Recovery of Metals from Solid Matrices
Leidy Rendón-Castrillón, Margarita Ramírez-Carmona
This review paper explores the potential of bioleaching as a sustainable alternative for recovering metals from solid matrices. With over 12 billion tons of solid waste annually worldwide, bioleaching provides a promising opportunity to extract metals from solid waste, avoiding harmful chemical processes. It explains bacterial and fungal bioleaching techniques that extract copper, gold, zinc, and
Review on Hydrometallurgical Recovery of Metals with Deep Eutectic Solvents
Guillaume Zante, Maria Boltoeva
Deep eutectic solvents (DESs) appeared recently as a new class of green designer solvents. The recovery of metals using hydrometallurgy is of major importance with the growth in metal demand. Several authors used these solvents for the hydrometallurgical recovery of metals from primary and secondary resources, and these studies are reviewed in the present work. Hydrophilic DESs can be used for the
A Brief Note on the Heap Leaching Technologies for the Recovery of Valuable Metals
Thriveni Thenepalli, Ramakrishna Chilakala
Heap leaching is a low-cost technology used in industrial mining to recover precious metals such as gold and uranium, along with several other highly sought after metals like copper, from their primary resources (ores and minerals). For many decades, there has been a growing demand for heap leaching due to its environmental benefits. Heap leaching provides mining operators with a benign, effective
Progress in bioleaching and its mechanism: a short review
Jyotilagna Dash, Ritesh Ojha
Bioleaching is an environmentally friendly and cost-effective technique for extracting metals from low-grade ores and waste materials. It uses microorganisms to dissolve metals through acidolysis, complexolysis, and redoxolysis, either directly or indirectly. While small-scale studies are conducted in shake flasks, larger applications include heap, vat, and tank systems. Bioleaching is promising f
Biosurfactants: An Overview of Their Properties, Production, and Application in Mineral Flotation
Carolina Rossini Simões, Matheus Willian Pereira da Silva
The quest for sustainable mining processes has directed research towards environmentally friendly alternatives to conventional beneficiation practices, with biosurfactants emerging as a viable option due to their lower environmental impact. This study reviews the application of biosurfactants as bioreagents in mineral flotation, exploring their production, their mechanisms of action, and the susta
Electro-catalytic Reduction of Aqueous Nitrates using Cu-Sn and Cu-Pd Cathodes
Bernd Weber, Alma Chávez
Water treatment systems are essential for reducing environmental impacts and providing potable water to meet quality standards. This study aims to evaluate the effectiveness of a low-cost Cu-Sn6 catalyst compared to a noble Cu-Pd catalyst for the electrocatalytic removal of nitrates from contaminated water in both laboratory and continuous pilot settings. Utilizing saturated carbonic acid as the a
Effect of operational parameters and Pd/In catalyst in the reduction of nitrate using copper electrode
Thiago Favarini Beltrame, Vanessa Coelho
Water with high concentration of nitrate may cause damage to health and to the environment. This study investigated how concentration, current density, flow, pH, the use of Pd/In catalyst and operating mode (constant current density and constant cell potential) have an influence in the electrochemical reduction of nitrate and in the formation of gaseous compounds using copper electrode. Experiment
Replacement of Natural Sand in Concrete by Polyethylene Bottles
Sahil Verma, Sahil Arora
Presently a lot of attention has been taken on waste plastic materials which are generated in huge amounts all over the world. The main problem is the disposal of waste plastic material. In this research paper, an effort is made to use waste plastic crushed bottles of appropriate size in concrete with partial replacement of fine aggregates, which has the potential to dispose of large quantities of
LOMINGO KAVULA HAGGITH 7
LOMINGO KAVULA HAGGITH
Cet article examine les impacts environnementaux du cycle de vie des batteries, en adoptant une approche Cradle-to-Grave et Cradle-to-Cradle. L'objectif est d'évaluer les effets écologiques à chaque étape du cycle de vie, y compris l'extraction des ressources, la fabrication, l'usage et la fin de vie. La méthodologie repose sur une revue des pratiques industrielles et des impacts environnementaux
Sustainability and Green Polymer Chemistry—An Overview
H. N. Cheng, Richard A. Gross
With increasing public awareness of climate change, environmental pollution, and earth’s declining resources, the concepts of sustainability and green chemistry have gained significant attention. This chapter provides an overview of selected polymer research areas that align with sustainability goals, particularly in the context of the 17 Sustainable Development Goals (SDGs) adopted by the United
Deep Eutectic Solvents in The Synthesis of Polymers
Masoud Mokhtary
This research focuses on the utilization of deep eutectic solvents (DESs) in the synthesis of polymers, addressing significant environmental concerns associated with solvent use in the polymer industry. The objective is to explore alternative reaction media that could minimize or eliminate organic solvents in polymer synthesis processes. The methodology involves analyzing the properties and format
Sustainable Solutions for Modern Economies
Rainer Höfer, Paul Anastas
This document presents a comprehensive overview of sustainable solutions for modern economies, highlighting the significance of integrating green chemistry principles into economic practices. The objective is to explore the innovative applications of sustainable methods in various industries, promoting ecological balance while achieving economic efficiency. Through a multidisciplinary approach, th
Sustainable development by new additives and resin systems
Rainer Höfer, Thorsten Roloff
Public construction and private housing have a significant impact on the landscape and environment, creating a notable responsibility for the paint and construction industries to preserve air and water quality. This article explores various additives and specialty resin systems that facilitate sustainable development within decorative architectural coatings and the construction sector. The objecti
Biomass-based Green Chemistry – sustainable solutions for modern economies
Joaquím Bigorra, Rainer Höfer
Renewable raw materials, specifically biomass, serve as a foundation for advancing industry towards the principles of green chemistry and sustainability. This paper aims to explore the potential of biomass as a viable alternative to fossil resources for energy generation and as a feedstock for industrial chemistry. Various forms of biomass, while essential for human nutrition and animal feed, can
Green chemistry—a sustainable solution for industrial specialties applications
Rainer Hofer, Joaquım Bigorra
This paper discusses the impact of wellness and sustainability mega-trends on consumer behavior and the manufacturing sector. The objective is to highlight the critical importance of sustainable practices in industrial applications, particularly through the lens of green chemistry. The methodology includes a review of historical consumption patterns and environmental impacts, emphasizing the signi
UTILISATION OF OIL PALM EMPTY FRUIT BUNCH ASH AS POTENTIAL NATURAL COAGULANT FOR PALM OIL MILL EFFLUENT TREATMENT
Nur Syahira Hisham, Zadariana Jamil
The palm oil mill industry generates massive wastes in solid and liquid forms such as Empty fruit bunches (EFB) and palm oil mill effluent (POME). These two wastes are high in fibre and organic content that may affect the environment and health without proper management. Thus, the recovery of these valuable resources from wastes is vital in order to reduce pollutions generated from palm oil produc
Toward N-nitrosamines free water: Formation, prevention, and removal
Peter Adeniyi Alaba, Yahaya Muhammad Sani
This study elucidates the recent trends in the formation, prevention, and removal of N-nitrosamines such as N-nitrosodimethylamine (NDMA) from wastewater or drinking water. Reports are rife on the occurrence of NDMA in areas such as amine degradation during postcombustion CO2 capture (PCC), chlorinated/chloraminated and ozonated drinking water, smoked or cooked foods, personal care, tobacco, and p
Preparation of the First Shipments of Transuranic Waste by the Los Alamos National Laboratory: A Rest Stop on the Road to the WIPP
Wander, S.G., Triay, I.R.
The Los Alamos National Laboratory (LANL) achieved a national milestone on the road to shipping transuranic (TRU) waste to the Waste Isolation Pilot Plant (WIPP) when it received certification authority on September 12, 1997. This paper describes the characterization of a non-mixed TRU waste stream, identified as waste stream TA-55-43 Lot No. 01, and the methods employed to ensure it does not cont
Optimizing High Level Waste Disposal
Dirk Gombert, Jay Roach
If society is ever to reap the potential benefits of nuclear energy, technologists must close the fuel-cycle completely. A closed cycle equates to a continued supply of fuel and safe reactors, but also reliable and comprehensive closure of waste issues. High level waste (HLW) disposal in borosilicate glass (BSG) is based on 1970s era evaluations. This host matrix is very adaptable to sequestering
NUCLEAR WASTE PROGRAMS SEMIANNUAL PROGRESS REPORT April---September
J. K. Bates, C. R. Bradley
This semiannual progress report summarizes activities carried out between April and September 1992 in the context of high-level radioactive waste management. The objective of the report is to outline the ongoing research and testing programs related to unsaturated glass behavior under radioactive conditions. Methodologically, the report details a range of tests and analytical studies, including cr
Research of the treatment of depleted nickel-plating electrolytes by the ferritization method
G. Kochetov, T. Prikhna
The research addresses the critical issue of protecting water resources from depletion and pollution, particularly regarding the toxic wastewater produced in galvanic industries. This study aims to evaluate the efficacy of the ferritization method for treating depleted nickel-plating electrolytes, which contain high concentrations of hazardous nickel compounds. A comprehensive methodology was empl
Enhancing the electrochemical Cr(VI) reduction in aqueous solution
Carlos Barrera-Díaz, Violeta Lugo-Lugo
In this study we present the cathodic Cr(VI) reduction using electrodissolution of iron anode. In batch experiments we tested four different cathodic materials; the best conditions were found when copper was used. It is observed that when more current is applied into the electrochemical cell faster reduction rates are achieved. Continuous experiments also reveal that Cr(VI) reduction could be done
Nickel recovery from the rinse waters of plating baths
G. Orhan, C. Arslan
An electrolytic process is applied to the de-metalization of rinse waters emerging from nickel-plating baths. The objective of this study was to investigate the optimum conditions for nickel recovery from these solutions. A series of experiments were conducted in a rotating packed cell (RollschichtzelleR), examining the effects of various parameters including the temperature and pH of the electrol