Article
Engineering, Environmental
Jeffrey Paulo H. Perez, Adrian Alexander Schiefler, Sandra Navaz Rubio, Markus Reischer, Niels Dossing Overheu, Liane G. Benning, Dominique J. Tobler
Summary: This study demonstrates the potential of green rust (GR) in treating arsenic (As) contamination in groundwater. Lowering temperature or adding arsenic can increase the stability of GR, reducing the solubility of arsenic and effectively immobilizing it in the mineral. This ultimately improves the efficiency of arsenic remediation.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Jeffrey Paulo H. Perez, Dominique J. Tobler, Helen M. Freeman, Andy P. Brown, Nicole S. Hondow, Case M. van Genuchten, Liane G. Benning
Summary: The study quantified the influence of As(iii) and As(v) on the crystallization of GR sulfate (GRSO4) and found that As(iii) had a stronger inhibitory effect than As(v), reducing structural coherence and ordering in As(iii)-bearing GRSO4 crystals. Mineral-bound As(iii) significantly increased the stability of GRSO4 phase and fully prevented its transformation to magnetite even after 720 hours.
ENVIRONMENTAL SCIENCE-NANO
(2021)
Article
Engineering, Environmental
Jianrong Xue, Dongping Long, Hong Zhong, Shuai Wang, Lihua Liu
Summary: The novel technology proposed in this study can effectively recover arsenic and antimony from arsenic-rich copper smelter dust, with recovery rates of over 97.5% for both elements through leaching and reduction steps.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Environmental Sciences
Rui Yang, Weimin Sun, Lifang Guo, Baoqin Li, Qi Wang, Duanyi Huang, Wenlong Gao, Rui Xu, Yongbin Li
Summary: Microorganisms can mediate the transformation of antimony and arsenic, thereby altering their mobility and toxicity. The contamination of antimony and arsenic has different effects on the alpha and beta diversities of protistan communities and their ecological networks. Arsenic contamination has a greater impact on protistan communities compared to antimony contamination.
ENVIRONMENTAL POLLUTION
(2022)
Article
Metallurgy & Metallurgical Engineering
Qin Yi, Ao Gong, Jia-cong Xu, Sheng-hui Wen, Zhi-feng Xu, Lei Tian
Summary: A novel method using a calcification transformation-carbothermal reduction process has been developed to treat arsenic alkali residue obtained from antimony smelting. The thermodynamic results show that the calcification transition increases the temperature difference between arsenic and antimony reduction, facilitating their separation. Under the optimal conditions, the arsenic and antimony in the residue achieve calcification rates of 99.67% and 98.74% respectively. The reduction of calcified slag under vacuum effectively separates arsenic and antimony, with a reduction rate of over 99% during the carbothermal reduction process. After reaction and purification by vacuum distillation, purities greater than 99.8% for As and Sb are obtained. Compared with traditional methods, this approach offers better separation and recovery of higher purity arsenic and antimony.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2023)
Article
Chemistry, Analytical
Yaosheng Liu, Yongxing Diao, Guangxing Hu, Yuyan Zhao, Yan Shi, Hongda Wang, Zhuang Li
Summary: In this study, the renewal methods of antimony-based sensors were proposed by physical polishing and electro-chemical cathode reduction. The pH response sensitivity of the sensor increased after polishing, and further improvement was achieved through electro-chemical cathode reduction. The reasons for the sensor's deterioration and renewable mechanisms were analyzed, and the renewable effect of electro-chemical cathode reduction was evaluated for long-term monitoring.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Article
Engineering, Chemical
Zanlang Tang, Xincun Tang, Haonan Liu, Zeyu Xiao
Summary: In this study, a clean process for recovering antimony and synthesizing scorodite was proposed, which can efficiently separate valuable antimony from toxic arsenic and mitigate arsenic pollution caused by the metallurgical process of nonferrous metals.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Edward D. Burton, Niloofar Karimian, Scott G. Johnston, Valerie A. Schoepfer, Girish Choppala, Dane Lamb
Summary: This study explores the interactions between As and Fe(III) minerals in acid mine drainage, revealing that arsenic significantly influences the formation and evolution of Fe(III) minerals. Arsenic has a significant impact on the stability and enrichment of Fe(III) minerals, triggering new mineral formation reactions.
ACS EARTH AND SPACE CHEMISTRY
(2021)
Article
Metallurgy & Metallurgical Engineering
Ke Wang, Qin-meng Wang, Yuan-lin Chen, Zhong-chen LI, Xue-yi Guo
Summary: Substance flow analysis was used to study an antimony pyrometallurgical system. Antimony and arsenic were taken as the objective elements, and mass balance and substance flow charts were established based on the production system. Evaluating indicators such as direct recovery rate, waste recovery rate, and resource efficiency were set up. The results showed that the resource efficiency of antimony was 89.21%, and the recovery rates of antimony in volatilization smelting, reduction smelting, and refining were 78.79%, 91.00%, and 96.06% respectively. Moreover, 11.94 kg of arsenic is carried into the smelting system for every 1 ton of antimony produced, indicating its presence as a major impurity element. Recommendations for improving the resource efficiency of antimony and cleaner production were proposed based on the substance flow analysis.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2023)
Article
Engineering, Environmental
Kun Gao, Yue Hu, Chuling Guo, Changdong Ke, Guining Lu, Zhi Dang
Summary: The addition of dissolved SO42- can mitigate the migration of As into the aqueous phase and replace jarosite with mackinawite. The microbial sulfidization of As-bearing jarosite by sulfate reducing bacteria reduced all As5+ to As3+, which is important for a better understanding of the geochemical cycling of elements As, S, and Fe in acid mine drainage and acid sulfate soil environments.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Jose Manuel Flores-Alvarez, Diego Cortes-Arriagada, Zeferino Gomez-Sandoval, Gururaj Kudur Jayaprakash, Silvia Guillermina Ceballos-Magana, Roberto Muniz-Valencia, Jaime Cristobal Rojas-Montes, Kayim Pineda-Urbina
Summary: A novel type of carbon paste electrode modified with mercaptobenzothiazole disulfide showed high selectivity and sensitivity towards copper, and was reliable for detecting Cu2+ in different types of waters.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
Christian Ritter, Nick Michel, Alina Rinow, Benjamin Ringler, Carsten von Hanisch
Summary: The stepwise synthesis of novel molecules containing As-Sb and As-Bi bonds was achieved by reacting tBu(2)ECl with tBuAs(H)Li to prepare binary interpnictogen compounds, followed by lithiation to obtain dimeric compounds. Compound 5 was found to be suitable for the preparation of longer chains, and the synthesis was confirmed through experiments.
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2021)
Article
Materials Science, Multidisciplinary
Victor H. Flores, Francisco Patino, Antoni Roca, Mizraim U. Flores, Ivan A. Reyes, Martin Reyes, Hernan Islas
Summary: In this study, a solid solution of arsenical ammonium-sodium jarosite was synthesized and its decomposition reaction in alkaline media was investigated. The formation of an ash layer and the diffusion of ions in the solution played important roles in the reaction process.
Article
Geochemistry & Geophysics
Elias Hernandez-Lazcano, E. Cerecedo-Saenz, J. Hernandez-Avila, Norman Toro, T. V. K. Karthik, D. Mendoza-Anaya, M. E. Fernandez-Garcia, V. Rodriguez-Lugo, E. Salinas-Rodriguez
Summary: This study investigated the structural and morphological properties of hydronium-potassium jarosite microstructures and evaluated their electrical properties. The results showed that as the pH increased, the particle size decreased and morphology changed, and the amount of hydronium substitution by potassium also increased. By using the microstructures as electrode materials in combination with graphite, a higher voltage range was obtained.
Article
Engineering, Environmental
Tim Platte, Nicolas Finck, Frank Heberling, Robert Polly, Tim Pruessmann, Kathy Dardenne, Horst Geckeis
Summary: Research shows that green rust chloride (GR-Cl) can retain iodide at low ionic strengths and pH levels between 7.5 and 8.5. The sorption of iodide by GR-Cl is influenced by ion exchange and the transformation of GR-Cl/I phases to magnetite. The presence of sulfate anions inhibits the uptake of iodide.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Girish Choppala, Niloofar Karimian, Edward D. Burton
Summary: In this study, the Fe(II)-induced transformation of Cr(VI)-substituted schwertmannite was investigated as a function of pH and the degree of Cr(VI) substitution. The results show that higher levels of Cr(VI) substitution inhibit the transformation, partly due to the consumption of Fe(II) by reaction with Cr(VI). This study enriches our understanding of the interactions between hazardous Cr(VI) and schwertmannite in environmental and engineered systems.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Geology
Maija J. Raudsepp, Sasha Wilson, Bree Morgan, Avni Patel, Scott G. Johnston, Emma J. Gagen, Stewart J. Fallon
Summary: This study evaluates the crystallization pathway of Ca-Mg carbonates in the Coorong Lakes and suggests that high magnesium calcite and magnesite likely precipitate via a non-classical crystallization pathway. The lakes' water only becomes supersaturated relative to amorphous carbonate phases after extensive evaporation in late summer, limiting the precipitation through non-classical crystallization.
Article
Environmental Sciences
Sepide Abbasi, Dane T. Lamb, Girish Choppala, Edward D. Burton, Mallavarapu Megharaj
Summary: This study investigated the speciation and transformation of Sb in plant roots using X-ray absorption spectroscopy. The results revealed that Sb mainly binds to the cell walls of plant roots, forming a coordination environment similar to Sb-polygalacturonic acid. This is the first study to demonstrate the crucial role of plant cell walls in Sb metabolism.
ENVIRONMENTAL POLLUTION
(2022)
Article
Engineering, Environmental
Girish Choppala, Dane Lamb, Robert Aughterson, Edward D. Burton
Summary: Tooeleite is an important As(III) host phase in mining-impacted environments and has received attention for immobilizing As(III) in environmental and engineered settings. The study shows that environmentally relevant concentrations of aqueous Fe(II) can significantly mobilize As(III) from Tooeleite into the aqueous phase, particularly under near-neutral pH conditions.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
William W. Bennett, Enzo Lombi, Kirk G. Scheckel, Ryo Sekine, Scott G. Johnston, Edward D. Burton, Daryl L. Howard, Peter Kappen, Donald E. Canfield
Summary: This study demonstrates the utility of synchrotron-based X-ray spectroscopic techniques in investigating the geochemistry of vanadium in ancient marine sediments. The results show that vanadium is primarily hosted by phyllosilicate-III and is strongly associated with potassium-rich clay minerals. The findings suggest that differentiating authigenic and detrital vanadium in ancient marine sediments may not be possible, which has implications for vanadium isotope system studies.
ACS EARTH AND SPACE CHEMISTRY
(2023)
Article
Engineering, Environmental
Niloofar Karimian, Scott G. Johnston, Ehsan Tavakkoli, Andrew J. Frierdich, Edward D. Burton
Summary: Jarosite, a common mineral in acidic sulfur-rich environments, can strongly sorb both As(V) and Sb(V). Little is known regarding the mechanisms that control simultaneous co-sorption of As(V) and Sb(V) to jarosite. This study examined the sorption mechanisms of As(V) and Sb(V) to jarosite, revealing a strong contrast in their sorption behaviors.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Environmental Sciences
Evelyn Dillon, Bree Morgan, Daniel T. Oldfield, Edward D. Burton, Jessica Veliscek-Carolan
Summary: Hierarchically porous titania beads with and without amine functionalisation were developed as adsorbents for highly toxic As(V) removal from acid mine drainage (AMD)-affected environments. The beads showed selective removal of As(V) over other competing elements, with different adsorption mechanisms for Fe(II)/Fe(III). The adsorption capacity of As(V) decreased in real AMD solutions, and non-functionalised titania beads were considered preferable for As remediation due to their greater selectivity. Porous titania beads with functionalisation offer a promising and flexible technology for remediating AMD-affected environments.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Engineering, Environmental
G. Scullett-Dean, J. L. Hamilton, O. Repina, H. E. A. Brand, E. D. Burton, M. Saunders, T. C. Santini
Summary: This study investigated the incorporation of various minor and trace elements into hematite and their effects on the physical and chemical properties of the mineral. It was found that the simultaneous incorporation of Al, Cr, V, and Zn showed both synergistic and antagonistic effects among certain element combinations. However, Mo had minimal association with hematite, while As completely prevented its formation. The results provide new insights into trace element geochemistry in hematite and emphasize the importance of multi-element studies in understanding natural and anthropogenic systems.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Correction
Chemistry, Multidisciplinary
William W. Bennett, Enzo Lombi, Kirk G. Scheckel, Ryo Sekine, Scott G. Johnston, Edward D. Burton, Daryl L. Howard, Peter Kappen, Donald E. Canfield
ACS EARTH AND SPACE CHEMISTRY
(2023)
Article
Engineering, Environmental
Qian Sun, Edward D. Burton, Dunfeng Si, Tingting Fan, Hu Cheng, Zhenghong Yu, Xiaohou Shao, Peixin Cui, Yujun Wang
Summary: Iron (oxyhydr)oxides and organic matter are closely associated in natural environments, and their fate can be influenced by sulfur cycling. Sulfur preferentially reacts with iron (oxyhydr)oxides to form inorganic sulfur, indirectly affecting the fate of organic matter. During the oxidation stage, previously formed iron (II) species are reoxidized to iron oxides, recapturing released organic matter.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
William W. Bennett, Enzo Lombi, Kirk G. Scheckel, Ryo Sekine, Scott G. Johnston, Edward D. Burton, Daryl L. Howard, Peter Kappen, Donald E. Canfield
Summary: This paper presents the use of synchrotron-based X-ray techniques to investigate the vanadium host phases in ancient marine sediments. The results show that vanadium is mainly present as vanadium (III) hosted by phyllosilicate. Strong associations between vanadium and potassium suggest that vanadium is hosted by potassium-rich clay minerals. Differentiating authigenic and detrital vanadium in ancient marine sediments is unlikely due to similar chemical speciation for both fractions.
ACS EARTH AND SPACE CHEMISTRY
(2023)