Complexation mechanism of Pb2+ at the ferrihydrite-water interface: The role of Al-substitution
文献类型: 外文期刊
作者: Liang, Yu 1 ; Jin, Jiezi 2 ; Wei, Zhiyuan 1 ; Wang, Mingxia 2 ; Xiong, Juan 2 ; Hou, Jingtao 2 ; Tan, Wenfeng 2 ;
作者机构: 1.Chinese Acad Trop Agr Sci, Trop Crops Genet Resources Inst, Haikou 571101, Hainan, Peoples R China
2.Huazhong Agr Univ, Coll Resources & Environm, State Environm Protect Key Lab Soil Hlth & Green, Wuhan 430070, Peoples R China
关键词: Iron (hydr)oxides; Al-substitution; Surface charge; Heavy metal adsorption; CD-MUSIC model
期刊名称:CHEMOSPHERE ( 影响因子:8.8; 五年影响因子:8.3 )
ISSN: 0045-6535
年卷期: 2022 年 307 卷
页码:
收录情况: SCI
摘要: Ferrihydrite is a poorly crystalline iron (hydr)oxide and highly efficient adsorbent for heavy metals. Al-substitution in ferrihydrite is ubiquitous in nature. However, the effect of Al-substitution on the surface reactivity of ferrihydrite remains unclear due to its low crystallinity. The present study aims to clarify the microstructure and interfacial reaction of Al-substituted ferrihydrite. Al-substitution had little effect on the morphology and surface site density of ferrihydrite, while the presence of =AlOH-0.5 sites resulted in higher proton affinity and surface positive charge of ferrihydrite. Besides, the affinity constant of Pb2+ adsorption on the surface of ferrihydrite decreased at higher Al content, which further decreased the adsorption performance of ferrihydrite for Pb2+. The modeling results revealed that bidentate complex was the dominant Pb complexation species on the surface of ferrihydrite, which was less affected by Al-substitution. The present study provides important insights into the effect of Al-substitution on the interfacial reaction at the ferrihydrite-water interface. The obtained parameters may facilitate the future advance of surface complexation model.
- 相关文献
作者其他论文 更多>>
-
Goose grazing shifts the dominance of annual vegetation in coconut plantations from aboveground biomass to the soil seed bank
作者:Hu, An;Wei, Zhiyuan;Dong, Qianzhen;Dong, Rongshu;Li, Xinyong;Hu, An;Wei, Zhiyuan;Dong, Qianzhen;Dong, Rongshu;Li, Xinyong;Dong, Qianzhen;Zhang, Rui;Yang, Weibo;Yu, Ruoyun
关键词:Goose grazing; Soil seed bank; Seed density; Seed richness; Annual plant
-
Generic phosphate affinity constants of the CD-MUSIC-eSGC model to predict phosphate adsorption and dominant speciation on iron (hydr)oxides
作者:Jin, Jiezi;Xiong, Juan;Wang, Mingxia;Huang, Chuanqin;Tan, Wenfeng;Liang, Yu;Koopal, Luuk
关键词:Iron (hydr)oxides; Phosphate; Surface complexation model; CD-MUSIC; Generic model parameters; Database
-
Complexation mechanism of Pb 2+on Al-substituted hematite: A modeling study and theoretical calculation
作者:Liang, Yu;Wei, Zhiyuan;Liang, Yu;Xiang, Yongjin;Xiong, Juan;Hou, Jingtao;Wang, Mingxia;Tan, Wenfeng;Avena, Marcelo
关键词:Iron oxide; Al-substitution; Interfacial reaction; CD-MUSIC model; DFT calculation
-
Effects of low-molecular-weight organic acids on the transformation and phosphate retention of iron (hydr)oxides
作者:Liang, Yu;Liu, Jing;Jin, Jiezi;Wei, Zhiyuan;Liu, Jing;Jin, Jiezi
关键词:Phosphate availability; Root-exudated LMWOAs; Rhizobox simulation; Iron (hydr)oxide
-
Face-dependent phosphate speciation on goethite: CD-MUSIC modeling and ATR-FTIR/2D-COS study
作者:Wang, Feng;Xu, Jinling;Xu, Yun;Xiong, Juan;Chen, Hongfeng;Liang, Yu
关键词:Goethite; Crystal face; Surface reactivity; Phosphate adsorption; ATR-FTIR; CD-MUSIC model
-
Adsorption behavior of soil fulvic acid on crystal faces of kaolinite and goethite: Described by CD-MUSIC model
作者:Chen, Hongfeng;Hou, Mingxia;He, Zhouyang;Chen, Hongfeng;Hou, Mingxia;He, Zhouyang;Liang, Yu;Xu, Jinling;Tan, Wenfeng
关键词:Fulvic acid; Kaolinite; Goethite; CD-MUSIC model; Isothermal titration calorimetry; Molar adsorption enthalpy
-
Generic CD-MUSIC-eSGC model parameters to predict the surface reactivity of iron (hydr)oxides
作者:Jin, Jiezi;Wang, Mingxia;Fang, Linchuan;Xiong, Juan;Hou, Jingtao;Tan, Wenfeng;Liang, Yu;Koopal, Luuk
关键词:Iron (hydr)oxides; Surface charge; Surface complexation model; Generic protonation parameters; Database