Article
Geochemistry & Geophysics
Hailiang Dong, Ethan S. Coffin, Yizhi Sheng, Matthew L. Duley, Yehia M. Khalifa
Summary: This study investigates the role of biochar in Fe redox cycling through bioreduction experiments. The concentration of biochar affects the reduction rate and extent of Fe(III). The presence of biochar creates two pathways for electron transfer, and the electron shuttling role of biochar enhances the rate of Fe(III) bioreduction. However, high concentration of biochar can impair both pathways and inhibit Fe(III) bioreduction.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2023)
Article
Chemistry, Physical
Fen Zhang, Wenqiang Xu, Liwen Zhang, Luyao Xi, Yaguang Du, Liying Ma, Shaohua Chen, Dongyun Du
Summary: Using riboflavin as a redox mediator can enhance the bioreduction of Cr(VI) by dissimilatory iron-reducing bacteria (DIRB) and improve the removal efficiency. Different metal ions have varying inhibitory effects on Cr(VI) removal. The role of riboflavin in the remediation of Cr(VI)-contaminated water in natural aquatic environments was investigated through experiments and mechanistic studies.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Geochemistry & Geophysics
Yuan Liu, Shengbao Shi, Qiang Zeng, Yang Li, Yu Chen, Dongyi Guo, Dafu Hu, Hailiang Dong
Summary: This study investigates the bio-reduction of structural Fe(III) in clay minerals by the iron-reducing bacterium Shewanella putrefaciens CN32. It finds that compounds in crude oil, particularly the saturated and aromatic fractions, can serve as electron donors and shuttle, facilitating the reduction of Fe(III) in clay minerals. The presence of lactate as an additional electron donor enhances the bio-reduction process, especially for the aromatic fraction. These findings have important implications for the coupled biogeochemical cycles of carbon and iron in oil reservoirs.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2023)
Article
Engineering, Environmental
Limin Zhang, Hailiang Dong, Runjie Li, Dong Liu, Liang Bian, Yu Chen, Zezhen Pan, Maxim I. Boyanov, Kenneth M. Kemner, Jianguo Wen, Qingyin Xia, Hongyu Chen, Edward J. O'Loughlin, Guanyu Wang, Ying Huang
Summary: Previous studies focused on bioreduction of uranium (VI) as a remediation method, but uranium (IV) can be reoxidized and remobilized. In this study, a combination of adsorption and bioreduction of U (VI) in the presence of an organic ligand and a Fe-rich clay mineral was found to partially solve this problem. The results provide novel insights into the mechanisms of U(VI) bioreduction and the stability of U.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Geochemistry & Geophysics
Hongyan Zuo, Liuqin Huang, Rosalie K. Chu, Nikola Tolic, Nancy Washton, Zihua Zhu, Richard E. Edelmann, Samar Elagamy, Andre Sommer, Fubo Luan, Qiang Zeng, Yu Chen, Dafu Hu, Di Zhan, Jinglong Hu, Hailiang Dong
Summary: Studies have shown that natural humic substances can act as electron donors to abiotically reduce Fe(III) in clays, as well as electron shuttles to enhance Fe(III) bioreduction by certain bacteria. Pahokee Peat humic acid was found to be more effective in this process compared to Leonardite humic acid.
AMERICAN MINERALOGIST
(2021)
Article
Engineering, Environmental
Ying Meng, Qingke Yuan, Fubo Luan
Summary: Electron shuttles (ESs) and Fe-bearing clay minerals have potential in enhancing Cr(VI) bioreduction. The acceleration of ESs and Fe(III) is crucial, with opposite trends observed in the promotion of ESs on Cr(VI) and Fe(III). The combined effect of ESs and NAu-2 showed a synergistic effect on Cr(VI) reduction.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Geochemistry & Geophysics
Swati A. Tandekar, Manoj A. Pande, Anita Shekhawat, Elvis Fosso-Kankeu, Sadanand Pandey, Ravin M. Jugade
Summary: In this study, Fe(III)-chitosan microbeads were prepared using a chemical coprecipitation method. The microbeads exhibited excellent adsorption capacity for Cr(VI) and PO43- ions, and the adsorption process followed a monolayer adsorption model. The adsorption was spontaneous, exothermic, and followed pseudo-second-order kinetics. The microbeads were also found to be reusable in multiple cycles.
Article
Biochemistry & Molecular Biology
Laura Cervera-Gabalda, Cristina Gomez-Polo
Summary: In this study, magnetic carbon nanocomposites were successfully used for the removal of Cr (VI). The results showed that the magnetic adsorbents synthesized at high annealing temperature exhibited high magnetization for magnetic separation and large specific surface area for enhanced pollutant adsorption. The adsorption tests confirmed the ability of the synthesized nanostructures to remove Cr (VI), and the materials showed reusability after consecutive adsorption cycles.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Engineering, Chemical
Jianqing Ma, Nanzhengfang Jia, Huixia Jin, Sijing Yao, Kefeng Zhang, Yin Kai, Wenliang Wu, Yuezhong Wen
Summary: This study reports on the dual applications of chitosan-induced synthesis of few-layer MoS2/Fe-doped biochar (Mo-Fe0.5-CS) in Cr(VI) removal. The Mo-Fe0.5-CS composite showed high affinity for Cr(VI) and demonstrated catalytic activity for Fenton-like reactions. These findings provide insights into the effective removal and utilization of Cr(VI) in wastewater treatment.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Lingmin Sun, Junshu Wu, Jinshu Wang, Meng Xu, Wenyuan Zhou, Yucheng Du, Yongli Li, Hongyi Li
Summary: In this study, the transformation of Ca-containing whewellite into hydroxyapatite nanorods derived from steel slag leaching solution was achieved. Fe(III)-bearing hydroxyapatite was then prepared through cation exchange and showed excellent photoreduction performance on Cr(VI) with the assistance of oxalic acid under visible light irradiation. This work provides a novel strategy for the high-efficient utilization of waste materials in wastewater purification applications.
Article
Engineering, Environmental
Donglei Zhang, Xiaolei Liu, Dongyi Guo, Gaoyuan Li, Junhua Qu, Hailiang Dong
Summary: Siderophores and iron-containing clays have been found to influence the transformation of chromium. In this study, the reduction of Cr(VI) by a tri-hydroxamate siderophore alone or in combination with reduced clays was investigated. The results showed that the reduction of Cr(VI) by the siderophore involved a one-electron transfer mechanism, resulting in the formation of Cr(V) intermediate and subsequent reduction to organically complexed Cr(III). Surprisingly, the presence of both the siderophore and reduced clays led to a decrease in the rate and extent of Cr(VI) reduction compared to reduced clays alone, indicating an inhibitory effect of the interaction between the siderophore and clays.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Environmental Sciences
Peng Zhang, Bingqian Zhu, Shunling Li, Wei Du, Hongbo Peng, Bo Liu, Zhao Wang
Summary: This study investigated the kinetics and efficiency of biochar in promoting Cr(VI) reduction by S. oneidensis MR-1 in a neutral solution. The results showed that the fast-bioreduction rates were influenced by the conductivity and particle size of biochar, while the slow-bioreduction rates were mainly determined by the electron donating capability of biochar, independent of cell concentration. Manipulating biochar properties may be helpful in effectively removing or detoxifying Cr(VI) in the environment.
Article
Geochemistry & Geophysics
Hang Cheng, Zehua Jing, Liu Yang, Anhuai Lu, Guiping Ren, Juan Liu
Summary: This study found that under dark conditions, hematite can promote Cr(VI) removal at low mineral-to-cell ratios, but can hinder the reduction of Cr(VI) with increased mineral ratios. Under simulated sunlight, S. oneidensis MR-1 generates electrons from lactate metabolism to reduce Cr(VI) with hematite.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2021)
Article
Engineering, Chemical
Ling Xiong, Liying Ma, Meiqi Zhao, Haojian Zhang, Shaohua Chen
Summary: Nanoscale zero-valent iron (nZVI) was successfully stabilized using fulvic acid (nZVI-FA). Shewanella oneidensis MR-1 (MR-1) was used to enhance the reactivity of the nZVI-FA. The combination of nZVI-FA and MR-1 effectively solved the aggregation and surface passivation of nZVI, significantly enhancing its reactivity for Cr(VI) removal.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Abeer El Shahawy, Mahmoud F. Mubarak, Merna El Shafie, Hesham M. Abdulla
Summary: Heavy metal ions in water pose significant risks to the biological system. Adsorption by nanomaterials, such as chitosan-based AgNPs/GO, is an effective method for removing heavy metal ions. This study investigated the optimal conditions for adsorption and tested different isotherms. The results showed that the adsorption capacity could be restored by washing the adsorbent with acid, but its effectiveness decreased after multiple cycles.
Article
Environmental Sciences
Chunbo Hao, Pengfei Wei, Lixin Pei, Zerui Du, Yi Zhang, Yanchun Lu, Hailiang Dong
ENVIRONMENTAL POLLUTION
(2017)
Article
Engineering, Environmental
Xi Wang, Hailiang Dong, Qiang Zeng, Qingyin Xia, Limin Zhang, Ziqi Zhou
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2017)
Article
Environmental Sciences
Yangjian Cheng, Li Zhang, Xiaojing Bian, Hongyang Zuo, Hailiang Dong
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2018)
Article
Geochemistry & Geophysics
Linduo Zhao, Hailiang Dong, Richard E. Edelmann, Qiang Zeng, Abinash Agrawal
GEOCHIMICA ET COSMOCHIMICA ACTA
(2017)
Article
Geochemistry & Geophysics
Liuqin Huang, Can Feng, Hongchen Jiang, Hailiang Dong, Zizhang Liu, Qiang Zeng, Xi Wang, Li Zhang
Article
Geochemistry & Geophysics
Limin Zhang, Hailiang Dong, Yan Liu, Liang Bian, Xi Wang, Ziqi Zhou, Ying Huang
Article
Microbiology
Shreya Srivastava, Brandon R. Briggs, Hailiang Dong
ENVIRONMENTAL MICROBIOLOGY
(2018)
Article
Biochemistry & Molecular Biology
Shiping Wei, Hongpeng Cui, Youhai Zhu, Zhenquan Lu, Shouji Pang, Shuai Zhang, Hailiang Dong, Xin Su
Article
Engineering, Environmental
Xiaolei Liu, Hailiang Dong, Xuewei Yang, Libor Kovarik, Yu Chen, Qiang Zeng
JOURNAL OF HAZARDOUS MATERIALS
(2018)
Article
Geochemistry & Geophysics
Gaoyuan Li, Li Li, Rafael Tarozo, William M. Longo, Karen J. Wang, Hailiang Dong, Yongsong Huang
ORGANIC GEOCHEMISTRY
(2018)
Article
Geosciences, Multidisciplinary
Chuanlun Zhang, Jian Lin, Sanzhong Li, Hailiang Dong, Fengping Wang, Shucheng Xie
SCIENCE CHINA-EARTH SCIENCES
(2018)
Article
Microbiology
Weiguo Hou, Shang Wang, Brandon R. Briggs, Gaoyuan Li, Wei Xie, Hailiang Dong
FRONTIERS IN MICROBIOLOGY
(2018)
Article
Materials Science, Ceramics
Jianan Nie, Liang Bian, Xiaobin Gu, Xiaoqiang Jiang, Hailiang Dong, Mianxin Song, Faqin Dong, Limin Zhang, Huichao He, Ping He, Nelson Belzile, Yuwei Chen, Shuhui Sun
CERAMICS INTERNATIONAL
(2018)
Article
Environmental Sciences
Hongpeng Cui, Xin Su, Fang Chen, Melanie Holland, Shengxiong Yang, Jinqiang Liang, Hailiang Dong, Weiguo Hou
MARINE ENVIRONMENTAL RESEARCH
(2019)
Article
Geochemistry & Geophysics
Xinze Lu, Geoffrey J. Gilleaudeau, Brian Kendall
Summary: The Late Ordovician mass extinction is the first major extinction event in the Phanerozoic, but the reasons for the decline in global biodiversity before the extinction are not well understood.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2024)
Article
Geochemistry & Geophysics
Junyao Kang, Daniel D. Gregory, Benjamin Gill, Shiqiang Huang, Changxin Lai, Zhaoshan Chang, Huan Cui, Ivan Belousov, Shuhai Xiao
Summary: Sedimentary pyrite is an important geological archive, but it can be altered by diagenetic and hydrothermal processes. This study successfully trained machine learning algorithms to distinguish pyrite origins using trace element data. The approach was validated and applied to identify the origins of pyrite in two sedimentary successions in South China.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2024)