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Title: Effect of Arsenic on the Formation and Adsorption Property of Ferric Hydroxide Precipitates in ZVI Treatment

Abstract

Treatment of arsenic by zerovalent iron (ZVI) has been studied extensively. However, the effect of arsenic on the formation of ferric hydroxide precipitates in the ZVI treatment has not been investigated. We discovered that the specific surface area (ca. 187 m2/g) and arsenic content (ca. 67 mg/g) of the suspended solids (As-containing solids) generated in the ZVI treatment of arsenic solutions were much higher than the specific surface area (ca. 37 m2/g) and adsorption capacity (ca.12 mg/g) of the suspended solids (As-free solids) generated in the arsenic-free solutions. Arsenic in the As-containing solids was much more stable than the adsorbed arsenic in As-free solids. XRD, SEM, TEM, and selected area electron diffraction (SAED) analyses showed that the As-containing solids consisted of amorphous nanoparticles, while the As-free solids were composed of micron particles with weak crystallinity. Extended X-ray absorption fine structure (EXAFS) analysis determined that As(V) was adsorbed on the As-containing suspended solids and magnetic solid surfaces through bidentate binuclear complexation; and As(V) formed a mononuclear complex on the As-free suspended solids. The formation of the surface As(V) complexes retarded the bonding of free FeO6 octahedra to the oxygen sites on FeO6 octahedral clusters and prevented the growth of the clustersmore » and their development into 3-dimensional crystalline phases.« less

Authors:
 [1]; ORCiD logo [2]; ORCiD logo [2];  [3];  [3]; ORCiD logo [4];  [2];  [5];  [2];  [2];  [2]
  1. School of Environment, Beijing Normal University, Beijing 100875, China; State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; State Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
  2. State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; State Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
  3. Center for Environmental Systems, Stevens Institute of Technology, Hoboken, New Jersey 07030, United States
  4. School of Resource and Environmental Science, Wuhan University, Wuhan 430079, China
  5. School of Environment, Beijing Normal University, Beijing 100875, China; State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Org.:
FOREIGN
OSTI Identifier:
1404948
Resource Type:
Journal Article
Journal Name:
Environmental Science and Technology
Additional Journal Information:
Journal Volume: 51; Journal Issue: 17; Journal ID: ISSN 0013-936X
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
ENGLISH
Subject:
54 ENVIRONMENTAL SCIENCES

Citation Formats

Peng, Xing, Xi, Beidou, Zhao, Ying, Shi, Qiantao, Meng, Xiaoguang, Mao, Xuhui, Jiang, Yonghai, Ma, Zhifei, Tan, Wenbing, Liu, Hongliang, and Gong, Bin. Effect of Arsenic on the Formation and Adsorption Property of Ferric Hydroxide Precipitates in ZVI Treatment. United States: N. p., 2017. Web. doi:10.1021/acs.est.7b02635.
Peng, Xing, Xi, Beidou, Zhao, Ying, Shi, Qiantao, Meng, Xiaoguang, Mao, Xuhui, Jiang, Yonghai, Ma, Zhifei, Tan, Wenbing, Liu, Hongliang, & Gong, Bin. Effect of Arsenic on the Formation and Adsorption Property of Ferric Hydroxide Precipitates in ZVI Treatment. United States. doi:10.1021/acs.est.7b02635.
Peng, Xing, Xi, Beidou, Zhao, Ying, Shi, Qiantao, Meng, Xiaoguang, Mao, Xuhui, Jiang, Yonghai, Ma, Zhifei, Tan, Wenbing, Liu, Hongliang, and Gong, Bin. Mon . "Effect of Arsenic on the Formation and Adsorption Property of Ferric Hydroxide Precipitates in ZVI Treatment". United States. doi:10.1021/acs.est.7b02635.
@article{osti_1404948,
title = {Effect of Arsenic on the Formation and Adsorption Property of Ferric Hydroxide Precipitates in ZVI Treatment},
author = {Peng, Xing and Xi, Beidou and Zhao, Ying and Shi, Qiantao and Meng, Xiaoguang and Mao, Xuhui and Jiang, Yonghai and Ma, Zhifei and Tan, Wenbing and Liu, Hongliang and Gong, Bin},
abstractNote = {Treatment of arsenic by zerovalent iron (ZVI) has been studied extensively. However, the effect of arsenic on the formation of ferric hydroxide precipitates in the ZVI treatment has not been investigated. We discovered that the specific surface area (ca. 187 m2/g) and arsenic content (ca. 67 mg/g) of the suspended solids (As-containing solids) generated in the ZVI treatment of arsenic solutions were much higher than the specific surface area (ca. 37 m2/g) and adsorption capacity (ca.12 mg/g) of the suspended solids (As-free solids) generated in the arsenic-free solutions. Arsenic in the As-containing solids was much more stable than the adsorbed arsenic in As-free solids. XRD, SEM, TEM, and selected area electron diffraction (SAED) analyses showed that the As-containing solids consisted of amorphous nanoparticles, while the As-free solids were composed of micron particles with weak crystallinity. Extended X-ray absorption fine structure (EXAFS) analysis determined that As(V) was adsorbed on the As-containing suspended solids and magnetic solid surfaces through bidentate binuclear complexation; and As(V) formed a mononuclear complex on the As-free suspended solids. The formation of the surface As(V) complexes retarded the bonding of free FeO6 octahedra to the oxygen sites on FeO6 octahedral clusters and prevented the growth of the clusters and their development into 3-dimensional crystalline phases.},
doi = {10.1021/acs.est.7b02635},
journal = {Environmental Science and Technology},
issn = {0013-936X},
number = 17,
volume = 51,
place = {United States},
year = {2017},
month = {8}
}