Article
Engineering, Environmental
Min Gan, Dongli Huang, Fang Chen, Ke Zhang, Jianyu Zhu
Summary: This study systematically investigated the Cr(VI) reduction and Cr(III) coprecipitation behavior mediated by sulfide minerals and Acidithiobacillus ferrooxidans, revealing a synergistic effect in achieving efficient removal of chromium contaminants. The dissolution of sulfide minerals and formation of secondary iron minerals played crucial roles in enhancing the removal of Cr(III) under the promotion of A. ferrooxidans. The research provides insights into solving redox-sensitive pollution through the collaboration between sulfide minerals and chemoautotrophic A. ferrooxidans, highlighting its environmental and practical significance.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Environmental
Jiaxin Li, Baogang Zhang, Meng Yang, Hai Lin
Summary: Bioleaching has the potential to efficiently and environmentally meet the demand for strategic vanadium. This study focused on bioleaching vanadium from common raw materials utilized in traditional extraction processes, finding that clinker had the highest leachability under optimized conditions. The results provide insights for developing sustainable techniques for vanadium extraction and integrating bioleaching with traditional processes.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Chemistry, Physical
Chang Zhu, Xiaoxiao Huang, Tingting Li, Qian Wang, Gang Yang
Summary: Research shows that catalytic reduction by alcohols over clay minerals efficiently controls Cr(VI) contamination; high selectivity towards different Cr products can be achieved by considering different active sites and coverage.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Engineering, Environmental
Fenglei Liu, Yiting Lou, Fang Xia, Baowei Hu
Summary: A novel collaborative strategy was developed by loading nZVI into the inter-layer structure of MBenes, enhancing the removal of U(VI)/Cr(VI). The results showed that nZVI@MBenes exhibited higher removal rate and saturated capacity compared to nZVI or MBenes.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Yiran Sun, Fei Yu, Liqing Li, Jie Ma
Summary: The study introduces a flexible one-pot approach to synthesize amino-functional graphene sponge adsorbents for eliminating Hexavalent Chromium in aqueous environment, which showed outstanding adsorption capacity and reduction efficiency. The novel adsorbents have great potential in treating chromium containing wastewater.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Heejung Jung, Yuta Inaba, Jonathan T. Vardner, Alan C. West, Scott Banta
Summary: With the decrease in high-grade ore reserves, it is crucial to develop suitable metal extraction methods for processing low-grade materials. Bioleaching, an energy- and environmentally friendly process, is effective for processing copper and other sulfidic ores. Overexpression of licanantase protein in Acidithiobacillus ferrooxidans improves cell attachment and biofilm formation, enhancing the bioleaching efficiency of certain low-grade copper ores.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Engineering, Chemical
Chunxiao Zhao, Baojun Yang, Rui Liao, Maoxin Hong, Shichao Yu, Shitong Liu, Jun Wang, Guanzhou Qiu
Summary: The presence of visible light and Ag+ significantly improved the copper extraction in chalcopyrite bioleaching, with specific mechanisms leading to enhanced dissolution rate and charge transfer. Light illumination helped reduce the resistance of the passivation layer and promote the accumulation of Ag2S and Ag-0 on the chalcopyrite surface.
MINERALS ENGINEERING
(2022)
Article
Engineering, Environmental
Yanni Xi, Tanghuan Xie, Yanfen Liu, Yangtao Wu, Huinian Liu, Zhu Su, Yicai Huang, Xingzhong Yuan, Chang Zhang, Xin Li
Summary: The composite material CMC-FeS@EPS was developed for the removal of Cr(VI) from water, showing higher efficiency compared to traditional materials, with good performance in a wide range of pH values and in the presence of other ions. FTIR and XPS analysis demonstrated that EPS functional groups accelerated the adsorption and precipitation process, while electrochemical results showed faster electron transfer to Cr(VI) in CMC-FeS@EPS compared to CMC-FeS.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Environmental Sciences
Juqing Lou, Hui Xu, Hao Jin, Yongqing Cao, Ruyi Wang
Summary: The mechanism of Tubificidae in a sludge reduction system under Cr stress was studied by conducting predation experiments and analyzing enzyme activities. The results showed that Tubificidae had detoxification capabilities and could convert Cr(VI) to Cr(III). These findings suggest that Tubificidae can be considered an effective scavenger of environmental Cr(VI).
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Chemical
Huizhen Shen, Li Chen, Cailong Zhou, Jingcheng Du, Chenyang Lu, Hao Yang, Luxi Tan, Xinjuan Zeng, Lichun Dong
Summary: In this study, NZVI was immobilized on porous TpPa-1 covalent organic frameworks (COFs) using dopamine as a connector, resulting in the formation of Fe-0/TpPa-1@DOPA composite. The composite exhibited excellent performance in Cr(VI) removal, making it a promising material for wastewater treatment.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Environmental
Siyu Zhang, Changhao Li, Changdong Ke, Sijia Liu, Qian Yao, Weilin Huang, Zhi Dang, Chuling Guo
Summary: Photosensitized biohybrid system (PBS) allows bacteria to utilize light energy harvested by semiconductors for efficient pollutants transformation, showing great potential in water reclamation. Establishing a biocompatible environment during photocatalytic reactions is crucial for the development of PBS-based treatment technologies. Supplying extracellular polymeric substances (EPS) fractions is found to enhance bacterial viability under adverse conditions, improving the performance of PBS for environmental remediation.
Article
Environmental Sciences
Liuqing Li, Senlin Tian, Ying Li, Jiayao Li, Jianhong Huang, Xuewei Hu
Summary: Quartz plays a significant role in the bio-oxidation of sulfide minerals, enhancing microbial activity, increasing acid production, decreasing secondary mineral production, and promoting leaching of iron and sulfate. This offers new insights for removing iron and sulfate, and addressing acid pollution caused by the oxidation of sulfide minerals.
BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY
(2021)
Article
Chemistry, Physical
Tsuyoshi Sugita, Masanobu Mori, Iwao Shimoyama
Summary: This study investigates the conversion of biotite into photocatalysts through heat treatment with CaCl2 and analyzes the resulting reaction products. The study finds that heating biotite and CaCl2 mixtures to 600 degrees C retains the biotite crystal structure, while heating to 700 degrees C transforms it into wadalite crystals. The Wadalite obtained after heat treatment shows a band gap of approximately 3.10 eV and increased photocatalytic activity with higher heat-treatment temperatures.
APPLIED CLAY SCIENCE
(2023)
Article
Chemistry, Physical
Xiangpeng Gao, Cheng Guo, Junjie Hao, Yan Zhang, Mingyang Li, Zhuo Zhao
Summary: In this study, the combination of calcium chloride and iron(III) nitrate with polyethyleneimine grafted sodium alginate successfully produced materials for the efficient removal of Cr (VI). The SPF material showed superior performance in the photocatalytic reduction of Cr (VI) due to its lower charge transfer resistance, facilitating the separation of photogenerated charges.
APPLIED SURFACE SCIENCE
(2022)
Article
Environmental Sciences
Rui Liao, Baojun Yang, Xiaotao Huang, Maoxing Hong, Shichao Yu, Shitong Liu, Jun Wang, Guanzhou Qiu
Summary: This study investigated the combined effect of silver and pyrite on chalcopyrite bio-dissolution, showing that their presence increased the release of copper. The promotion effect of silver and pyrite on chalcopyrite bio-dissolution was mainly attributed to the increase of ferric ions in solution and the reduction of passivation layer on chalcopyrite surface.