数字农科院2.0

Molecular Insights into Roles of Dissolved Organic Matter in Cr(III) Immobilization by Coprecipitation with Fe(III) Probed by STXM-Ptychography and XANES Spectroscopy

文献类型： 外文期刊

作者： Xing Xia;Jian Wang;Yongfeng Hu;Jin Liu;Aminu Inuwa Darma;Lin Jin;Hui Han;Chao He;Jianjun Yang

作者机构：

关键词： aggregation and deposition;chromium;iron oxides;molecular mechanisms;STXM-ptychography;XANES

期刊名称： Environmental Science and Technology

ISSN： 0013-936X

年卷期： 2022 年 56 卷 4 期

页码：

收录情况： SCIE（2022版）

摘要： The coprecipitation of heavy metals (HMs) with Fe(III) in the presence of dissolved organic matter (DOM) is a crucial process to control the mobility of HMs in the environment, but its underlying immobilization mechanisms are unclear. In this study, Cr(III) immobilization by coprecipitation with Fe(III) in the presence of straw-derived DOMs under different Fe/C molar ratios, pHs, and ionic strengths was investigated using scanning transmission X-ray microscopy (STXM) and ptychography and X-ray absorption near-edge structure (XANES) spectroscopy. The results showed that Cr(III) retention was enhanced in the presence of DOM, a maximum of which was achieved at an Fe/C molar ratio of 0.5. The increase of pH and ionic strength could also promote Cr(III) immobilization. Cr K-edge XANES results indicated that Fe (oxy)hydroxide fractions, instead of organics, provided the predominant binding sites for Cr(III), which was directly confirmed by high spatial resolution STXM-ptychography analysis at the sub-micron- and nanoscales. Moreover, organics could indirectly facilitate Cr immobilization by improving the aggregation and deposition of coprecipitate particles through DOM bridging or electrostatic interactions. Additionally, C K-edge XANES analysis further indicated that the carboxylic groups of DOM were complexed with Fe (oxy)hydroxides, which probably contributed to DOM bridging. This study provides a new insight into Cr(III) immobilization mechanisms in its coprecipitation with Fe(III) and DOM, which could have important implications on the management of Cr(III)-enriched soils, particularly with crop straw returning.

分类号：

  • 相关文献

[1]Organic Matter Counteracts the Enhancement of Cr(III) Extractability during the Fe(II)-Catalyzed Ferrihydrite Transformation: A Nanoscale- and Molecular-Level Investigation. Xia, Xing,Liu, Jin,Jin, Lin,Wang, Jian,Darma, Aminu Inuwa,He, Chao,Shakouri, Mohsen,Hu, Yongfeng,Yang, Jianjun. 2023

[2]Arsenic speciation transformation and arsenite influx and efflux across the cell membrane of fungi investigated using HPLC-HG-AFS and, in-situ XANES. Zeng, Xibai,Su, Shiming,Wang, Xiurong,Li, Lianfang,Wang, Yanan,Wu, Cuixia,Bai, Lingyu,Duan, Ran,Feng, Qiufen,Zhang, Yangzhu,Zharig, Lili,Jiang, Sheng,Li, Aiguo. 2015

[3]Inoculating chlamydospores of Trichoderma asperellum SM-12F1 changes arsenic availability and enzyme activity in soils and improves water spinach growth. Su, Shiming,Zeng, Xibai,Bai, Lingyu,Wang, Yanan,Wu, Cuixia,Williams, Paul N.,Zhang, Lili.

[4]Mechanism study of sulfur fertilization mediating copper translocation and biotransformation in rice (Oryza sativa L.) plants. Sun, Lijuan,Fang, Huaxiang,Xu, Chen,Peng, Cheng,Huang, Haomin,Shi, Jiyan,Sun, Lijuan,Fang, Huaxiang,Peng, Cheng,Lu, Lingli,Shi, Jiyan,Yang, Jianjun,Xu, Chen,Duan, Dechao,Huang, Haomin,Zhang, Xiangzhi.

[5]New insights into the sorption mechanism of cadmium on red mud. Luo, Lei,Ma, Yibing,Luo, Lei,Zhang, Shuzhen,Lv, Jitao,Ma, Chenyan,Cui, Mingqi.

[6]Concurrent methylation and demethylation of arsenic by fungi and their differential expression in the protoplasm proteome. Su, Shiming,Zeng, Xibai,Bai, Lingyu,Wang, Yanan,Wu, Cuixia,Zhang, Lili,Li, Mansheng.

[7]Phosphorus speciation and transformation in long-term fertilized soil: evidence from chemical fractionation and P K-edge XANES spectroscopy. Luo, Lei,Sanders, Rebecca L.,Myneni, Satish C. B.,Luo, Lei,Xu, Chuang,Ma, Yibing,Li, Jumei.

[8]Long-term organic substitution management affects soil phosphorus speciation and reduces leaching in greenhouse vegetable production. Yinjie Zhang,Wei Gao,Haoan Luan,Jiwei Tang,Ruonan Li,Mingyue Li,Huaizhi Zhang,Shaowen Huang. 2021

[9]Formation of ferrihydrite induced by low pe+pH in paddy soil reduces Cd uptake by rice: Evidence from Cd isotope fractionation. Luyao Qin,Meng Wang,Xiaoyi Sun,Lei Yu,Jing Wang,Yun Han,Shibao Chen. 2023

[10]Hematite Enhances The Immobilization Of Copper, Cadmium And Phosphorus In Soil Amended With Hydroxyapatite Under Flooded Conditions. Cui, HB, Zhang, X, Wu, QG, Zhang, SW, Xu, L, Zhou, J, Zheng, XB, Zhou, J. 2020

[11]Synergistic effects of Cd-loving Bacillus sp. N3 and iron oxides on immobilizing Cd and reducing wheat uptake of Cd. Hui Han,Xuejiao Wu,Ruiqing Hui,Xing Xia,Zhaojin Chen,Lunguang Yao,Jianjun Yang. 2022

[12]Fe oxides simultaneously improve stability of Cd and carbon in paddy soil：The underlying influence at aggregate level. Shanshan Li,Yang Fei,Chen Wang,Jiajun Sun,Jiahui Liang,Yao Feng,Bing Yang,Meng Wang,Huading Shi,Shibao Chen. 2024

[13]Conservation tillage enhances the sequestration and iron-mediated stabilization of aggregate-associated organic carbon in Mollisols. Zixuan Han,Xueping Wu,Aizhen Liang,Shengping Li,Huizhou Gao,Xiaojun Song,Xiaotong Liu,Angyuan Jia,Aurore Degré. 2024

[14]A dual mechanism drives the enrichment of pedogenic magnetic particles derived from red beds. Ran Huang,Xiaoyong Long,Yue Zhang,Dengchun Xing,Chuan Liu,Yongjun Jiang,Daoxian Yuan. 2024

[15]Contrasting effects of iron oxides on soil organic carbon accumulation in paddy and upland fields under long-term fertilization. Dong Wu,Lei Wu,Kailou Liu,Jianying Shang,Wenju Zhang. 2024

[16]Factors and Mechanisms Affecting Arsenic Migration in Cultivated Soils Irrigated with Contained Arsenic Brackish Groundwater. Dai, Wenjing,Shi, Rongguang,Li, Xiaodong,Zhao, Zhiqi,Xia, Zihan,Li, Dongli,Li, Yan,Cui, Gaoyang,Ding, Shiyuan. 2024

[17]Iron oxides accelerate soil electron transport to promote the degradation of organic pollutants: A review. Yu, Xin,Yang, Yuewei,Zhang, Yun,Sun, Jialu,Zhang, Xiaolin,Zhao, Xiaodong,Wang, Kai,Li, Tian,Li, Xiaojing. 2025

[18]Selenium levels in soil and tea as affected by soil properties in Jiangxi Province, China. Fahui Jiang,Yan Wu,Mahbub Ul Islam,Xinfeng Jiang,Binqiang Wang,Shaolang He,Xiaobing Lin,Yongming Sun,Guohui Chen,Xi Chen,Shangshu Huang. 2024

[19]Complex molecular mechanisms underlying seedling salt tolerance in rice revealed by comparative transcriptome and metabolomic profiling. Wang, Wen-Sheng,Zhao, Xiu-Qin,Li, Min,Huang, Li-Yu,Xu, Jian-Long,Zhang, Fan,Cui, Yan-Ru,Fu, Bin-Ying,Li, Zhi-Kang,Li, Min,Xu, Jian-Long,Fu, Bin-Ying,Li, Zhi-Kang.

[20]The Potential Regulatory Mechanisms Of T.he Gonadotropin-Releasing Hormone In G onadotropin Transcriptions Identified With Bioinformatics Analyses. Xiang, W, Zhang, BY, Lv, FL, Feng, GD, Chen, L, Yang, F, Zhang, K, Cao, CY, Wang, PQ, Chu, MX. 2017

作者其他论文 更多>>