Article
Microbiology
Ziyan Qian, Chuan Wu, Weisong Pan, Xiaoran Xiong, Libing Xia, Waichin Li
Summary: This study demonstrates the potential application of iron-oxidizing bacteria (FeOB) in the remediation of arsenic (As) pollution in paddy soils. Inoculation of FeOB reduces the bioavailability of As in paddy soils, decreases As accumulation in rice tissues, and enhances the resistance of the soil to peroxide pollution caused by As. Additionally, FeOB inoculation alters the microbial community structure and soil metabolism, promoting the biotransformation process of As in the soil.
FRONTIERS IN MICROBIOLOGY
(2022)
Article
Plant Sciences
Takeshi Watanabe, Kento Kato, Kohei Kawaguchi, Toshiya Oga, Yoshinori Ban, Cecile Harmonie Otoidobiga, Adama Sawadogo, Issa Wonni, Leonard S. Ouedraogo, Jean Didier Zongo, Dayeri Dianou, Susumu Asakawa
Summary: This study investigated the bacterial community structure and abundance of specific indicator bacteria in Fe-toxic paddy fields in Burkina Faso (BF) and Anjo, Japan (AN). The results showed potential Fe reducers in the rhizosphere soil of the BF field and a lower abundance of Fe oxidizers in the rice roots compared to AN. These findings suggest that the ratios of specific bacteria can serve as indicators of potential Fe(II)-oxidizing activity in the rice rhizosphere.
SOIL SCIENCE AND PLANT NUTRITION
(2023)
Article
Environmental Sciences
Min Xu, Peng Gao, Jun Wu, Jing Ma, Xiaohong Zhang, Gang Yang, Lulu Long, Chao Chen, Chun Song, Yinlong Xiao
Summary: The addition of maize straw-derived biochar increased the concentrations of iron and arsenic in pore water, promoting their accumulation in roots and enhancing rice biomass. Biochar also improved rice tolerance to arsenic toxicity by increasing root TTC reductive intensity, reducing H2O2 concentration, and promoting iron plaque formation. Furthermore, biochar increased crystalline iron formation on the root surface and iron content in the cell wall, facilitating arsenic sequestration.
Article
Biodiversity Conservation
Liang Wei, Zhenke Zhu, Bahar S. Razavi, Mouliang Xiao, Maxim Dorodnikov, Lichao Fan, Hongzhao Yuan, Andrey Yurtaev, Yu Luo, Weiguo Cheng, Yakov Kuzyakov, Jinshui Wu, Tida Ge
Summary: Paddies have higher organic carbon stocks than upland soils, and iron plaque on rice roots is a mechanism that traps carbon. This study quantified the contribution of iron plaque to organic matter stabilization in the rice rhizosphere and estimated its role in global carbon sequestration in paddy soils. The results showed that iron plaque formation increased the amount of carbon trapped, and this mechanism could potentially capture a significant amount of carbon globally each rice season.
GLOBAL CHANGE BIOLOGY
(2022)
Article
Environmental Sciences
Shengguo Xue, Xuan He, Xingxing Jiang, Weisong Pan, Waichin Li, Libing Xia, Chuan Wu
Summary: In paddy soil, iron-oxidizing bacteria can influence the speciation and accumulation of arsenic in rice. The bacteria can reduce, transport, and potentially oxidize arsenic. The findings also suggest that radial oxygen loss in rhizosphere soils promotes arsenic oxidation.
ENVIRONMENTAL POLLUTION
(2022)
Article
Engineering, Environmental
Maria Garcia-Rios, Laurent De Windt, Linda Luquot, Corinne Casiot
Summary: By developing a reactive transport model, the mechanism of natural attenuation in high-As acid mine drainage was studied, revealing that the fast Fe(II) oxidation rate and slow As(III) oxidation rate are among the controlling factors.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Plant Sciences
Sarun Thongnok, Wilailak Siripornadulsil, Surasak Siripornadulsil
Summary: The combination of AsIII-oxidizing bacteria and Cd-tolerant bacteria significantly improved rice growth and yield while reducing arsenic toxicity and accumulation in rice grains in As-contaminated soils.
ENVIRONMENTAL AND EXPERIMENTAL BOTANY
(2021)
Article
Environmental Sciences
Zhongzheng Yan, Huijie Meng, Qiqiong Zhang, Yuxin Bi, Xiaoqing Gao, Ying Lei
Summary: This study found that cadmium (Cd) and flooding treatments have significant effects on plant root exudates, rhizosphere bacterial community structure, and the formation of root Fe plaques in Kandelia obovata. By influencing the relative abundance of Fe redox cycling bacteria, they are involved in the production and breakdown of Fe plaque in the roots.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Abdur Razzak, Md Shafiquzzaman, Husnain Haider, Mohammad Alresheedi
Summary: This study investigated the biological oxidation of As(III) and Fe(II) using laboratory experiments and reactive transport modeling. By using Fe-oxidizing bacteria and coconut husk support media, the study successfully reduced the concentration of As(III) and Fe(II) in synthetic groundwater.
ENVIRONMENTAL POLLUTION
(2021)
Article
Environmental Sciences
Xiao Wang, Junpeng Wang, Yang-Guo Zhao, Farhana Maqbool, Liang Guo, Mengchun Gao, Chunji Jin, Junyuan Ji
Summary: The study utilized modified ceramsite and immobilized sulfur-oxidizing bacteria to successfully control sulfide pollution in simulated mariculture systems, achieving effective sulfide removal. The results demonstrate that dosing ICC and SICC simultaneously might be an effective strategy with promising potential for improving the deteriorated mariculture environment.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Ting Wei, Xun Liu, MingFang Dong, Xin Lv, Li Hua, HongLei Jia, XinHao Ren, ShengHui Yu, JunKang Guo, YongTao Li
Summary: The study found that bacterial inoculation stimulates the formation of iron plaque on the root surface of rice plants and has an impact on the elemental content of the plaque, plant growth, and cadmium content. In particular, inoculation with YGL bacteria can help reduce the cadmium content in rice grains.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Environmental Sciences
Mengmeng Zhao, Gege Zheng, Xiuyun Kang, Xiaoyan Zhang, Junming Guo, Mingxia Zhang, Jingwen Zhang, Yiping Chen, Lingui Xue
Summary: Microbial remediation plays a crucial role in improving heavy metal-polluted water. In this study, two bacterial strains, K1 (Acinetobacter gandensis) and K7 (Delftiatsuruhatensis), were identified for their high tolerance and strong oxidation ability towards arsenite [As(III)]. These strains could tolerate high concentrations of As(III) and facilitate its oxidation and adsorption for remediation purposes. The findings also demonstrated the improved efficiency of As(III) adsorption when these bacterial strains were co-immobilized with Chlorella, suggesting a promising method for cleaner production of industrial wastewater.
ENVIRONMENTAL POLLUTION
(2023)
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
Biotechnology & Applied Microbiology
Weiwei Xiao, Xiaoman He, Guobing Lin, Zhaoguang Yang, Lin Wang
Summary: Rice consumption is the main route of human exposure to arsenic contamination. Two arsenite-oxidizing bacterial strains were isolated from contaminated soils, showing potential in reducing arsenic accumulation in rice plants, making them candidates for arsenic contamination remediation in the environment.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Environmental Sciences
Shadma Afzal, Nand K. Singh
Summary: This study assessed the impact of zinc oxide and iron oxide nanoparticles on rice growth, seed quality, and the microbial community in the rhizosphere environment. The results showed that low concentrations of these nanoparticles can promote rice growth and improve grain quality. Additionally, the nanoparticles treatment led to increased diversity and richness of soil microbes.
ENVIRONMENTAL POLLUTION
(2022)