Article
Engineering, Environmental
Zhao-Feng Yuan, Tong-Yao Pu, Chen -Yu Jin, Wei-Jia Feng, Jia-Yue Wang, Williamson Gustave, Jonathan Bridge, Yi-Li Cheng, Xian-Jin Tang, Yong-Guan Zhu, Zheng Chen
Summary: This study presents a method of extracting arsenic from contaminated soil using plastic tubes, which are covered with iron oxides that can easily be separated from the soil, providing a low-cost and sustainable soil remediation technique.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Environmental Sciences
Xianjun Xie, Chun Lu, Rui Xu, Xueqian Yang, Lu Yan, Chunli Su
Summary: Fe-Mn bimetallic oxides with mesoporous structure were synthesized and studied for arsenic removal, with Fe1Mn1-300 showing the largest specific surface area and maximum arsenic absorption capacity.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
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
Biotechnology & Applied Microbiology
Natalia Gonzalez-Pech, Anna L. Molloy, Alexandra Zambrano, Wayne Lin, Arash Bohloul, Rafael Zarate-Araiza, Carolina Avendano, Vicki L. Colvin
Summary: This study compares the use of commercial iron-oxide nanoparticles (IONPs) with proven arsenic sorbents for arsenic remediation. The results showed that some commercial sorbents can effectively treat water contaminated with arsenic, but the cost of treatment and waste generation pose challenges for developing countries.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2022)
Article
Engineering, Environmental
Liping Fang, Jialin Chi, Qiantao Shi, Yundang Wu, Fangbai Li
Summary: This study investigates the electron transfer between electron shuttling compound cysteine (Cys) and hematite, as well as the relocations of surface-bound arsenic (As). The results show that the electron transfer generates Fe(II) and leads to reductive dissolution, with more Fe(II) generated on {001} facets of exposed hematite nanoplates (HNPs). Reductive dissolution of hematite significantly enhances the relocation of As(V) on hematite, but the rapid release of As(III) can be halted by the addition of Cys, leading to unchanged immobilization of As(III) throughout the course of reductive dissolution.
Review
Metallurgy & Metallurgical Engineering
Kameswara Srikar Sista, Deepak Kumar, Gourav Ranjan Sinha, Abhijeet Premkumar Moon, Srinivas Dwarapudi
Summary: Iron powders are potential materials for water remediation, especially in arsenic removal, due to their low cost, high reactivity, multiple removal mechanisms, and commercial availability. The presence of arsenic in various oxidation states makes its removal from aqueous systems a challenging problem. The physico-chemical properties of iron powders and the properties of the aqueous system play a significant role in steering the arsenic removal process.
ISIJ INTERNATIONAL
(2021)
Article
Engineering, Environmental
Zibo Xu, Zhonghao Wan, Yuqing Sun, Xinde Cao, Deyi Hou, Daniel S. Alessi, Yong Sik Ok, Daniel C. W. Tsang
Summary: Customizing iron speciation in Fe-biochar is crucial for effective arsenic immobilization. Different iron speciations play distinct roles in As removal, with labile/amorphous-C inducing more reductive-Fe(0) formation leading to efficient As immobilization, while stable/graphitic-C generates more amorphous-Fe resulting in high As removal despite limited Fe(0) content. This study provides insights for the design of multifunctional Fe-biochar for environmental remediation.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Environmental Sciences
Hermano Melo Queiroz, Francisco Ruiz, Youjun Deng, Valdomiro S. de Souza Junior, Amanda Duim Ferreira, Xose Luis Otero, Danilo de Lima Camelo, Angelo Fraga Bernardino, Tiago Osorio Ferreira
Summary: This study evaluated geochemical changes in Fe-rich tailings after a mining disaster, finding a significant decrease in crystallinity of Fe oxyhydroxides, resulting in increased reactivity with cationic and anionic species and greater susceptibility to reductive dissolution.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
C. Zhang, Y. Hao, K. Zhang, S. Chen, Z. Yang
Summary: Electrokinetic remediation coupled with the addition of sucrose or biogas slurry was used to enhance arsenic migration ability in contaminated soil. Sucrose treatment led to lower electroosmotic flow rate and maintained a lower pH in soil, while also creating a stronger reducing environment and increasing the abundance of iron oxide reducing bacteria. The addition of sucrose was more effective in stabilizing the current and reducing energy consumption. These findings provide theoretical support for improving the technology for removal of soil arsenic.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2023)
Article
Environmental Sciences
Florian Lahrouch, Ning Guo, Myrtille O. J. Y. Hunault, Pier Lorenzo Solari, Michael Descostes, Martine Gerard
Summary: Investigating uranium migration mechanisms related to the weathering of waste rocks is crucial for addressing potential environmental issues caused by uranium mining. This study showed the important role of iron oxyhydroxides in immobilizing and concentrating uranium, with uranyl ternary surface complexes identified at the ferrihydrite surface. Additionally, goethite and lepidocrocite were found to be secondary traps for U immobilization.
Article
Environmental Sciences
Yao Yao, Hang Zhou, Xiu-Lan Yan, Xiao Yang, Kang-Wen Huang, Juan Liu, Li-Juan Li, Jing-Yi Zhang, Jiao-Feng Gu, Yaoyu Zhou, Bo-Han Liao
Summary: Arsenic-contaminated paddy soil can lead to elevated levels of As in rice plants, posing a risk to human health. The Fe3O4-modified biochar (NBC-Fe) was found to reduce the bioavailability of As in soil, decrease As accumulation in rice, and increase the thickness of iron plaque to sequester As on rice root surfaces, making it a promising soil amendment for remediation.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Environmental Sciences
Weiquan Li, Xueying Lin, Sihao Lv, Weizhao Yin, Zhanqiang Fang, Jingling Huang, Ping Li, Jinhua Wu
Summary: This study investigated the effect of hydrogenotrophic denitrification on cadmium (Cd(II)) removal and column life-span using hydrogen-autotrophic microorganisms and zero-valent iron (Fe-0) filled columns. The results showed that the nitrate-mediated bio-Fe-0 column had a higher Cd(II) removal efficiency and longer service life compared to the bio-Fe-0 and Fe-0 columns. This improvement was attributed to hydrogenotrophic denitrification, which caused more iron corrosion and more secondary mineral generation, providing more reaction sites for Cd(II) adsorption and immobilization. The distribution of reactive zone along the bio-Fe-0 column mediated by nitrate was found to be uneven, with the latter half part identified as a more active region for Cd(II) immobilization.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Carmen Pizarro, Mauricio Escudey, Eliana Caroca, Carolina Pavez, Gustavo E. Zuniga
Summary: The study found that small-sized nanomagnetite particles may hinder plant growth, while anchoring nanomaterials in larger composites presents a promising alternative to reduce potential risks associated with size.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Environmental
Md Annaduzzaman, Luuk C. Rietveld, Devanita Ghosh, Bilqis A. Hoque, Doris van Halem
Summary: Anoxic storage containers can enhance arsenic removal in groundwater treatment systems, even when the oxidation process is slower compared to aerobic storage. Aeration prior to storage may lead to rapid oxidation of Fe2+ and impact the removal efficiency of As.
Article
Environmental Sciences
Abhishek Kumar, Tanushree Bhattacharya
Summary: Biochar prepared from wheat straw at different pyrolysis temperatures showed smooth and porous surface with abundant functional groups. The maximum arsenic removal of 83.7% was achieved under optimized conditions. Various studies indicated the feasibility of arsenic removal through physisorption, chemisorption, ion exchange, and diffusion mechanisms.
BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY
(2022)