Review
Biochemistry & Molecular Biology
Bence Farkas, Hana Vojtkova, Zuzana Farkas, Domenico Pangallo, Peter Kasak, Antonio Lupini, Hyunjung Kim, Martin Urik, Peter Matus
Summary: Manganese oxides are crucial in natural geochemical barriers, as they have reactive properties towards essential and potentially toxic trace elements. Microorganisms can actively alter conditions in their microenvironment and dissolve minerals, as well as precipitate bioavailable manganese ions into biogenic minerals. These microbial transformations significantly impact the geochemistry of manganese and elements associated with its oxides, potentially leading to environmental consequences.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Engineering, Environmental
Shu Jiang, Xishou Guo, Yanrui Wang, Xinyuan Wen, Hailin Chang, Jinlong Wang, Guibai Li, Heng Liang, Xiaobin Tang
Summary: This study aimed to develop new strategies to enhance the manganese removal by the sand filter. The results indicated that modified zeolite exerted the highest adsorption capacity for manganese. Introducing the NaClO oxidation would effectively improve the manganese removal efficiency by the modified zeolite filter, owing to the fast formation of catalytic oxidation capability. These findings are significant in developing simple, practical, and cost-effective strategies for seasonal manganese contamination.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Environmental Sciences
Anthi S. Stefanarou, Constantinos Chrysikopoulos
Summary: The study found that titanium dioxide can serve as an effective adsorbent for the removal of formaldehyde from water samples. The combination of TiO2 with quartz sand was observed to enhance the efficiency of formaldehyde removal. Chemisorption was identified as the main sorption mechanism.
Article
Engineering, Environmental
Haiyang Yang, Xiaobin Tang, Xinsheng Luo, Guibai Li, Heng Liang, Shane Snyder
Summary: The study found that adding potassium permanganate significantly improves manganese removal efficiency and shortens the start-up period; there is a good correlation between manganese deposition concentration and removal rate; potassium permanganate facilitates the production of MnO2 and promotes manganese conversion.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Engineering, Environmental
Francesc Corbera-Rubio, Michele Laureni, Nienke Koudijs, Simon Mueller, Theo van Alen, Frank Schoonenberg, Sebastian Luecker, Martin Pabst, Mark C. M. van Loosdrecht, Doris van Halem
Summary: Rapid sand filters (RSF) are commonly used for groundwater treatment, however, the processes controlling the removal of iron, ammonia, and manganese are not well understood. This study investigated two drinking water treatment plant configurations and found that the removal of ammonium and manganese only occurred after iron depletion. The microbial composition and media coating within each compartment were found to be homogeneous, indicating the effect of backwashing. However, the removal of contaminants was stratified within each compartment, with proteins catalyzing ammonia oxidation and nitrifying genera showing significant differences in abundances between top and bottom samples. These findings highlight the potential of metaproteomics in understanding metabolic adaptations and interactions in dynamic ecosystems.
Article
Engineering, Environmental
Miaomiao Tan, Longfei Liu, Minggu Zhang, Yanli Liu, Chengliang Li
Summary: This study found that the mobility of PSMPs in MOCS was significantly lower compared to bare sand, due to the existence of attractive electrostatic force and rougher collector surfaces. However, the presence of Cd2+ and HA could increase the transport of PSMPs in MOCS.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Environmental Sciences
Qiyuan Lu, Weimin Zhang, Xia Xiong, Yadan Guo, Dandan Huang, Haiyan Liu
Summary: Hydroxyapatite-coated quartz sands were successfully synthesized and used as a permeable reactive barrier (PRB) medium for removing manganese from contaminated water. The study investigated the effects of particle size, initial concentration of manganese, and hydraulic load on manganese removal. The results showed that the initial concentration of manganese had the greatest impact on Mn(II) removal. The adsorption mechanisms were mainly ion exchange and dissolution-precipitation. The hydroxyapatite-coated quartz sands proved to be an effective medium for treating manganese-contaminated water.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Fangfei Cai, Funing Ma, Xiaoying Zhang, Paul Reimus, Linlin Qi, Yu Wang, Di Lu, Hung Vo Thanh, Zhenxue Dai
Summary: This study investigated the sorption characteristics of strontium (Sr) on granite, as well as the coexistence system of granite and colloids under various hydrogeochemical conditions. The results showed that the concentration of bentonite colloids significantly affected Sr sorption, while pH and ionic strength played crucial roles in the process.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Haiyang Yang, Xiaobin Tang, Langming Bai, Liu Yang, Junwen Ding, Rui Chen, Xing Du, Guibai Li, Heng Liang
Summary: The study demonstrated that the addition of potassium permanganate (KMnO4) significantly reduced the start-up period for treating groundwater and surface water in RSF systems, enhancing manganese removal rates. Prokaryotes played a crucial role in system performance and NH4+-N removal, enriching bacterial community diversity and improving RSF stability when facing hydraulic loading shock. The synergistic effect of KMnO4 and prokaryotes provided new insights into manganese and ammonium elimination in RSF systems, beneficial for practical applications.
Article
Agronomy
Wenqian Zhang, Chang Lv, Xue Zhao, Aihong Dong, Wenquan Niu
Summary: The type of suspended particles significantly affects the clogging degree of emitters in drip irrigation technology, with Yellow River sand causing the most severe clogging and sodium bentonite causing the least. Suspended particles undergo two stages of sedimentation: rapid and slow.
AGRICULTURAL WATER MANAGEMENT
(2021)
Article
Multidisciplinary Sciences
Donglin Wang, Quan Ma, Hui Lin, Jie Zhou, Suxia Yuan, Baiwen Ma, Yaohui Bai, Jiuhui Qu
Summary: Recent investigations have found that adding manganese (Mn) sand to constructed wetlands significantly improves the removal of organic micropollutants (MPs). In addition to direct oxidation and adsorption, Mn oxides play a crucial role in the biotransformation of MPs. Lab-scale constructed wetlands were constructed with or without the addition of natural Mn sand to understand the influence of Mn oxides on the biotransformation of selected MPs commonly found in wastewater. The results showed that the addition of Mn sand improved the removal of MPs and enhanced their biotransformation.
Article
Engineering, Environmental
Mismel Ruiz-Garcia, Mario Villalobos, Andreas Voegelin, Teresa Pi-Puig, Nadia Martinez-Villegas, Joerg Goettlicher
Summary: In laboratory experiments, the uptake of Tl(I) by hexagonal birnessites was observed to trigger a complete phase conversion with Tl(I) as the sole reacting cation, resulting in lower residual dissolved Tl+ concentrations compared to single-step additions. This novel pathway may have implications for contaminated environments and the formation of minerals like thalliomelane.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Engineering, Environmental
Qian Peng, Yingjie Zhang, Wanling Zhong, Kun Liu, Jiajie Xing, Xuekun Tang
Summary: In this study, monolithic catalysts loaded with manganese-cobalt bimetallic oxide on manganese sand were constructed, showing enhanced catalytic performance for peroxymonosulfate activation and potential for environmental remediation.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Environmental Sciences
Lisha Wu, Amid P. Khodadoust, Snover Punia
Summary: A manganese coated sand (MCS) sorbent has been developed for the removal of chromium from water, with the ability to adsorb both Cr(VI) and Cr(III) over a wide pH range. The sorbent exhibits favorable adsorption properties and can be regenerated, making it an environmentally friendly alternative to ion-exchange technology.
ENVIRONMENTAL TECHNOLOGY
(2023)
Article
Engineering, Environmental
Shuang Zhang, Baohui Li, Yi Chen, Mengqiang Zhu, Joel A. Pedersen, Baohua Gu, Zimeng Wang, Hui Li, Jinling Liu, Xin-Quan Zhou, Yun-Yun Hao, Hong Jiang, Fan Liu, Yu-Rong Liu, Hui Yin
Summary: Methylmercury (MeHg) is a potent neurotoxin with adverse health impacts on humans. This research demonstrates that trivalent manganese (Mn(III)) can degrade MeHg in natural environments, suggesting potential applications for remediating heavily polluted soils and engineered systems containing MeHg.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
