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Geng R, Yuan L, Shi L, Qiang S, Li Y, Liang J, Li P, Zheng G, Fan Q. New insights into the sorption of U(VI) on kaolinite and illite in the presence of Aspergillus niger. CHEMOSPHERE 2022; 288:132497. [PMID: 34626657 DOI: 10.1016/j.chemosphere.2021.132497] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2021] [Revised: 10/03/2021] [Accepted: 10/05/2021] [Indexed: 06/13/2023]
Abstract
The regulation effect of Aspergillus niger to the sorption behavior of U(VI) on kaolinite and illite was studied through investigating the enrichment of U(VI) on kaolinite-Aspergillus niger and illite-Aspergillus niger composites. Kaolinite- or illite-A. niger composites were prepared through co-culturation method. Results showed that U(VI) sorption on kaolinite and illite in different pH ranges could be attributed to ion exchange, outer-sphere complexes (OSCs), and inner-sphere complexes (ISCs), while only the ISCs on the bio-composites. Moreover, micro-spectroscopy tests revealed that U(VI) coordinate with phosphate, amide, and carboxyl groups on illite- and kaolinite- A. niger composites. X-ray photoelectron spectroscopy (XPS) further found that U(VI) was partly reduced to non-crystalline U(IV) by A. niger in the bio-composites, occurring as phosphate coordination polymers or biomass-associated monomers. The findings herein provide further insight into the immobilization and migration of uranium in environments.
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Affiliation(s)
- Rongyue Geng
- Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Longmiao Yuan
- Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Leiping Shi
- Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Shirong Qiang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, Institute of Physiology, School of Basic Medical Sciences, Lanzhou University, Lanzhou, 730000, China
| | - Yuqiang Li
- Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China
| | - Jianjun Liang
- Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China; Key Laboratory of Petroleum Resources, Gansu Province, Lanzhou, 730000, China
| | - Ping Li
- Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China; Key Laboratory of Petroleum Resources, Gansu Province, Lanzhou, 730000, China
| | - Guodong Zheng
- Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China; Key Laboratory of Petroleum Resources, Gansu Province, Lanzhou, 730000, China
| | - Qiaohui Fan
- Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China; Key Laboratory of Petroleum Resources, Gansu Province, Lanzhou, 730000, China.
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Zhao Y, Dong F, Dai Q, Li G, Ma J. Variation of preserving organic matter bound in interlayer of montmorillonite induced by microbial metabolic process. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:22348-22355. [PMID: 28744678 DOI: 10.1007/s11356-017-9806-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2017] [Accepted: 07/20/2017] [Indexed: 06/07/2023]
Abstract
This paper aimed to investigate the variation of preserving organic matter bound in the interlayer space of montmorillonite (Mt) induced by a microbe metabolic process. We selected Bacillus pumilus as the common soil native bacteria. The alteration of d 001 value, functional group, and C,N organic matter contents caused by bacteria were analyzed by XRD, FTIR, and elementary analyzer, respectively. XRD results showed that the d 001 value of montmorillonite increased with the concentration decreasing and decreased with the culture time increasing after interacting with bacteria indicating the interlayer space of montmorillonite was connected with the organic matter. The findings of long-term interaction by resetting culture conditions implied that the montmorillonite buffered the organic matter when the nutrition was enough and released again when the nutrition was lacking. The results of the elementary analyzer declared the content of organic matter was according to the d 001 value of montmorillonite and N organic matter which played a major impact. FTIR results confirmed that the Si-O stretching vibrations of Mt were affected by the functional group of organic matter. Our results showed that the montmorillonite under the influence of soil bacteria has a strong buffering capacity for preserving organic matter into the interlayer space in a short-term. It might provide critical implications for understanding the evolution process and the preservation of fertilization which was in the over-fertilization or less-fertilization conditions on farmland.
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Affiliation(s)
- Yulian Zhao
- School of Environment and Resource, Southwest University of Science and Technology, Mianyang, Sichuan Province, 621010, China
- Key Laboratory of Solid Waste Treatment and Resource Recycle, Ministry of Education, Mianyang, Sichuan Province, 621010, China
| | - Faqin Dong
- School of Environment and Resource, Southwest University of Science and Technology, Mianyang, Sichuan Province, 621010, China.
- Key Laboratory of Solid Waste Treatment and Resource Recycle, Ministry of Education, Mianyang, Sichuan Province, 621010, China.
| | - Qunwei Dai
- School of Environment and Resource, Southwest University of Science and Technology, Mianyang, Sichuan Province, 621010, China
- Key Laboratory of Solid Waste Treatment and Resource Recycle, Ministry of Education, Mianyang, Sichuan Province, 621010, China
| | - Gang Li
- School of Environment and Resource, Southwest University of Science and Technology, Mianyang, Sichuan Province, 621010, China
| | - Jie Ma
- School of Environment and Resource, Southwest University of Science and Technology, Mianyang, Sichuan Province, 621010, China
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Chen M, Kim SH, Jung HJ, Hyun JH, Choi JH, Lee HJ, Huh IA, Hur J. Dynamics of dissolved organic matter in riverine sediments affected by weir impoundments: Production, benthic flux, and environmental implications. WATER RESEARCH 2017; 121:150-161. [PMID: 28527389 DOI: 10.1016/j.watres.2017.05.022] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2017] [Revised: 05/08/2017] [Accepted: 05/09/2017] [Indexed: 06/07/2023]
Abstract
In order to understand the characteristics and dynamics of dissolved organic matter (DOM) in the sediment of rivers affected by impoundments, we examined the vertical profiles and the benthic fluxes of DOM in four different core sediments located at upstream sites of weirs in major rivers of South Korea. In three out of four sites, exponential accumulation of dissolved organic carbon (DOC) with depth was observed with the signature of seasonal variability. Except for the site displaying a below-detection limit of Fe(II), the general accumulation trends of DOC with depth was concurrent with the increases of Fe(II) and NH4+ and the decrease of PO43-, signifying a close linkage of the DOM dynamics with anaerobic respiration via iron reduction, an important early diagenesis pathway. The estimated benthic fluxes from the cores revealed that the sediments likely serve as DOC, chromophoric DOM (CDOM), and fluorescent DOM (FDOM) sources to the overlying water. The benthic effluxes based on DOC were comparable to the ranges previously reported in lake and coastal areas, and those of CDOM and FDOM showed even higher levels. These findings imply that impoundment-affected river systems would change the DOM composition of the overlying water, ultimately influencing the subsequent water treatment processes such as disinfection byproducts production and membrane fouling. A simple mass balance model indicated that the impoundment-affected river sediments may operate as a net carbon sink in the environments due to a greater extent of sedimentation compared to the estimated benthic efflux and sediment biological respiration.
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Affiliation(s)
- Meilian Chen
- Department of Environment & Energy, Sejong University, Seoul, 05006, South Korea
| | - Sung-Han Kim
- Department of Environmental Marine Sciences, Hanyang University, 1271 Sa 1 dong, Ansan, Gyeonggi do, 15588, South Korea
| | - Heon-Jae Jung
- Department of Environment & Energy, Sejong University, Seoul, 05006, South Korea
| | - Jung-Ho Hyun
- Department of Environmental Marine Sciences, Hanyang University, 1271 Sa 1 dong, Ansan, Gyeonggi do, 15588, South Korea
| | - Jung Hyun Choi
- Department of Environmental Science & Engineering, Ewha Womans University, Seoul, 03760, South Korea
| | - Hyo-Jin Lee
- Geosystem Research Corporation, Gunpo-si, Gyeonggi-do, 15807, South Korea
| | - In-Ae Huh
- National Institute of Environmental Research, Incheon, 22689, South Korea
| | - Jin Hur
- Department of Environment & Energy, Sejong University, Seoul, 05006, South Korea.
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