Effect of long-term equilibration on the toxicity of molybdenum to soil organisms

被引：37

作者：

van Gestel, Cornelis A. M. ^{[1
]}

McGrath, Steve P. ^{[2
]}

Smolders, Erik ^{[3
]}

Ortiz, Maria Diez ^{[1
]}

Borgman, Eef ^{[1
]}

Verweij, Rudo A. ^{[1
]}

Buekers, Jurgen ^{[3
]}

Oorts, Koen ^{[4
]}

机构：

[1] Vrije Univ Amsterdam, Fac Earth & Life Sci, Dept Anim Ecol, NL-1081 HV Amsterdam, Netherlands

[2] Rothamsted Res, Cross Inst Programme Sustainable Soil Funct, Harpenden AL5 2JQ, Herts, England

[3] Univ Leuven, Div Soil & Water Management, Katholieke Univ Leuven, B-3001 Louvain, Belgium

[4] ARCHE Assessing Risks CHEm, B-9000 Ghent, Belgium

来源：

ENVIRONMENTAL POLLUTION | 2012年 / 162卷

基金：

英国生物技术与生命科学研究理事会;

关键词：

Ageing; Leaching; Earthworms; Plants; Enchytraeids; Collembola; Toxicity; Bioavailability; IRON-OXIDES; COPPER; BIOAVAILABILITY; MOLYBDATE; ZINC; BIOACCUMULATION; ADSORPTION; FIELD; LEAD;

D O I：

10.1016/j.envpol.2011.10.013

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

To determine if long-term equilibration may alleviate molybdenum toxicity, earthworms, enchytraeids, collembolans and four plant species were exposed to three soils freshly spiked with Na2MoO4.2H(2)O and equilibrated for 6 or 11 months in the field with free drainage. Total Mo concentrations in soil decreased by leaching, most (up to 98%) in sandy soil and less (54-62%) in silty and clayey soils. Changes in residual Mo toxicity with time were inconclusive in sandy soil. In the other two soils, toxicity of residual total Mo was significantly reduced after 11 months equilibration with a median 5.5-fold increase in ED50s. Mo fixation in soil, i.e. the decrease of soil solution Mo concentrations at equivalent residual total soil Mo, was maximally a factor of 2.1 only. This experiment shows natural attenuation of molybdate ecotoxicity under field conditions is related to leaching of excess Mo and other ions as well as to slow ageing reactions. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：1 / 7

页数：7

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