Review
Engineering, Environmental
Liang Zhang, Yan-Ying Qiu, Yan Zhou, Guang-Hao Chen, Mark C. M. van Loosdrecht, Feng Jiang
Summary: Biochemical oxidation and reduction processes using elemental sulfur have emerged as cost-effective and attractive alternatives for water and wastewater treatment, offering benefits such as reduced operational costs, avoidance of secondary pollution, and efficient mineralization of organic matter.
Article
Environmental Sciences
Chiyue Huang, Zhaohui Guo, Chi Peng, Richmond Anaman, Pan Zhang
Summary: In this study, the mechanism of Fe\\Mn oxidizing bacteria on the immobilization of Cd in mining soil was investigated through bioremediation batch experiments and characterization methods. The results showed that these bacteria successfully reduced the extractable Cd content in the soil and promoted the formation of Fe\\Mn precipitates with high adsorption capacity for soil Cd. The oxidation rates of Fe and Mn in the treated soil reached 70.32% and 63.15% respectively. Additionally, the bacteria increased soil pH and decreased soil organic matter content, further reducing the extractable Cd. Fe\\Mn oxidizing bacteria have the potential to be used for immobilizing heavy metals in large mining areas.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Ayush Singh, Munish K. Chandel
Summary: The study evaluated the mobility and chemical speciation of heavy metals in fine fraction collected from a municipal solid waste dumpsite in Mumbai, India. Results showed an increasing trend in heavy metal concentration with waste age, with zinc having the highest concentration. Cadmium was identified as the most polluting and mobile heavy metal, while chromium had the least mobility.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Engineering, Environmental
Carlos Ruiz Canovas, Raul Moreno Gonzalez, Bruno J. C. Vieira, Joao Carlos Waerenborgh, Rosa Marques, Francisco Macias, Maria Dolores Basallote, Manuel Olias, Maria Isabel Prudencio
Summary: This study evaluates the mobility and bioaccessibility of metal/loids in Fe-rich mine wastes resulting from historical cyanide leaching activities. The wastes demonstrate high reactivity upon rainfall contact, releasing high concentrations of iron, lead, and aluminum, as well as posing potential risks for aquatic life. Mineralogy plays a role in controlling the mobility and bioaccessibility of metal/loids, highlighting the need for restoration measures in historical mine sites.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Review
Environmental Sciences
Phuong Minh Nguyen, Phuc Thi Do, Yen Bao Pham, Thi Oanh Doan, Xuan Cuong Nguyen, Woo Kul Lee, D. Duc Nguyen, Ashiwin Vadiveloo, Myoung-Jin Um, Huu Hao Ngo
Summary: This study provides an overview and critical discussion on the roles, mechanisms, and environmental applications of sulfur-oxidizing bacteria (SOB). The findings reveal the involvement of key enzymes in the oxidation of various sulfur compounds. Environmental applications of SOB include detoxifying hydrogen sulfide, soil bioremediation, and wastewater treatment. Future prospects in SOB development include S0 recovery, SOB enrichment, field measurement and identification of sulfur compounds, and the development of mathematical simulation.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Xin Qi, Jialei Gou, Xiaoming Chen, Shiqi Xiao, Imran Ali, Ran Shang, Dan Wang, Yuewen Wu, Mengwei Han, Xuegang Luo
Summary: The research demonstrated the positive effects of biochar pyrolyzed from various materials on soil properties and microbial activities, with corn stalk biochar showing the best improvement. Mixed bacteria MB9 composed of three strains effectively adsorbed U and Cd, and two types of MB9-loaded biochar demonstrated superior immobilization performance. These findings offer a feasible and cost-effective solution for remediating heavy metal contamination in farmland soil.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Environmental Sciences
Xue-fang Tang, Yong Wu, Li-bi Han, Zhen Lan, Xing-ping Rong
Summary: Compared with water and air pollution, soil pollution is more concealed and poses higher risks. This study compared the leaching characteristics between column leaching and natural leaching tests and found that heavy metals were released in two stages and influenced by various factors. Although the column leaching test can simulate natural heavy metal migration to some extent, there are significant differences from actual accumulation.
ENVIRONMENTAL EARTH SCIENCES
(2022)
Article
Engineering, Environmental
Xinhao Ren, Yu Chen, Ming Zhang, Yuenan Xu, Honglei Jia, Ting Wei, Junkang Guo
Summary: This study evaluated the effect of soil particle size on heavy metals removal by washing with low molecular weight organic acids. The results showed that citric acid was the most efficient eluent for removing Cd. After washing, the total Cd content in the soil decreased significantly, and the weak acid extractable and reducible forms of Cd were effectively removed.
ENVIRONMENTAL GEOCHEMISTRY AND HEALTH
(2023)
Article
Environmental Sciences
Mengbo Liu, Shengli Wang, Meng Yang, Xiang Ning, Zhongren Nan
Summary: The study examined the use of manganese-oxidizing bacteria in soil treatment, finding that P. taiwanensis thrived in pH 5-9 with a salt tolerance of 6%. The strains could endure high concentrations of As(V) and Mn(II), and effectively remove As, Pb, and Cd from water with removal rates around 20-30%. The ratio of iron to manganese played a role in arsenic removal efficiency, with the best ratio being 1:5.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Engineering, Environmental
Ergang Wen, Xing Yang, Hanbo Chen, Sabry M. Shaheen, Binoy Sarkar, Song Xu, Hocheol Song, Yong Liang, Jorg Rinklebe, Deyi Hou, Yong Li, Fengchang Wu, Michael Pohorely, Jonathan W. C. Wong, Hailong Wang
Summary: The study found that FeBC effectively reduced the bioavailability of As and Pb in paddy soils, while RawBC was more suitable for reducing the bioavailability of Cd. In addition, FeBC treatment not only increased rice yield, but also had a certain impact on soil enzyme activity.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Engineering, Environmental
Xiaolin Kuang, Liang Peng, Ziyi Cheng, Siyan Zhou, Shaoning Chen, Cheng Peng, Huijuan Song, Changwu Li, Dan Li
Summary: Fertilization concentration significantly impacts the removal of Cd by paddy crusts. Low fertilizer concentration promotes Cd removal, while medium and high concentrations reduce Cd accumulation. Low concentration of fertilizer stimulates the growth of filamentous green algae, leading to an increase in the relative abundance of Pelagophyceae and Comamonadaceae. This study provides a new perspective for the remediation of heavy metal contamination in paddy fields.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Review
Environmental Sciences
Yining Gao, Pan Wu, Paramsothy Jeyakumar, Nanthi Bolan, Hailong Wang, Bin Gao, Shengsen Wang, Bing Wang
Summary: Soil heavy metal contamination caused by mining activities is a global issue that threatens public health. Biochar, as an environmentally friendly soil remediation agent, can effectively immobilize heavy metals. However, research on biochar remediation in mining areas is limited and the remediation effect is influenced by various factors. It is necessary to systematically unravel the knowledge of biochar remediation and provide guidance for future studies.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Chemistry, Multidisciplinary
Yihan Zhang, Zimu Song, Kosuke Sugita, Shan Xue, Wen Zhang
Summary: This study investigated the release of heavy metals from polluted soil under the flow of pore water containing nanobubbles, simulating natural ebullition. The results showed that nanobubbles in the pore water flow were significantly more effective in releasing lead compared to DI water, with CO2 nanobubbles being the most effective and H-2 nanobubbles being the least effective. The findings could provide new insights into soil pollutant release under ebullition and soil remediation using water wash containing nanobubbles.
Article
Environmental Sciences
Xin Yuan, Yiquan Sun, Dong Ni, Zhenwen Xie, Yanyan Zhang, Sun Miao, Linjun Wu, Xin Xing, Jiane Zuo
Summary: This study developed an environmentally friendly strategy for gaseous sulfide control by enriching indigenous sulfur-oxidizing bacteria (SOB) and achieved efficient sulfide removal in lab-scale sewer reactors.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Engineering, Environmental
Ting Wei, Xian Li, Hong Li, Han Gao, Junkang Guo, Yongtao Li, Xinhao Ren, Li Hua, Honglei Jia
Summary: A bacteria consortium with optimal Cd, Pb adsorption ability was constructed and immobilized on biochar/activated carbon. The application of bacteria-loaded biochar/activated carbon significantly reduced the extractable Cd and Pb in soil, improved soil quality, and increased plant biomass.
JOURNAL OF HAZARDOUS MATERIALS
(2022)