Adsorption of Cadmium and Zinc onto Micaceous Minerals:Effect of Siderophore Desferrioxamine B

被引：0

作者：

Mohsen HAMIDPOUR ^{[1
]}

Maliheh KARAMOOZ ^{[1
]}

Abdolreza AKHGAR ^{[1
]}

Ahmad TAJABADIPOUR ^{[1
]}

Gerhard FURRER ^{[2
]}

机构：

[1] Department of Soil Science, Vali-e-Asr University of Rafsanjan

[2] Department of Environmental Systems Science, Institute of Biogeochemistry and Pollutant Dynamics, ETH Zurich

来源：

Pedosphere | 2019年 / 05期

关键词：

arid soil; chemical speciation; Freundlich isotherm; heavy metal; low-molecular-weight organic acid; muscovite; phlogopite; soil clay fraction;

D O I：

暂无

中图分类号：

X505 [环境污染防治方法与设备]; P579 [实验矿物学、应用矿物学];

学科分类号：

071012 ; 0713 ; 083002 ; 070901 ;

摘要：

The mobility,bioavailability,and environmental fate of heavy metals in soil are controlled by their adsorption onto soil minerals and solid organic matter.The adsorption is strongly affected by the presence of various low-molecular-weight organic acids.In this study,effect of hydroxamate siderophore desferrioxamine B（DFOB）on cadmium（Cd）and zinc（Zn）adsorption onto two micaceous clay minerals,muscovite and phlogopite,was evaluated in batch experiments.Results showed that the presence of DFOB diminished the adsorption of Cd and Zn onto both minerals,particularly under neutral to alkaline pH conditions.For instance,at pH 8.2,the presence of DFOB caused a decrease in the adsorption of Zn onto phlogopite by nearly 50%.The equilibrium adsorption of Cd and Zn was satisfactorily described using Freundlich isotherm.The adsorption isotherms showed that the affinity of Cd and Zn onto the minerals decreased in the presence of DFOB.For example,at pH 8.0,the presence of siderophore caused a decrease in the Freundlich adsorption isotherm coefficient KF for Zn adsorption onto muscovite and phlogopite from 4.60 to 0.07 L g-1 and from 3.56 to 0.36L g-1,respectively.These findings confirm the potential influence of siderophore on the fate of Cd and Zn in arid soils containing substantial contributions of micaceous silicate minerals.

引用

页码：590 / 597

页数：8

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