Arsenic fractionation in agricultural acid soils from NW Spain using a sequential extraction procedure

被引：18

作者：

Novoa-Munoz, Juan Carlos

Queijeiro, Jose Manuel G.

Blanco-Ward, Daniel

Alvarez-Olleros, Cristalina

Garcia-Rodeja, Eduardo

Martinez-Cortizas, Antonio

机构：

[1] Univ Vigo, Fac Ciencias Ourense, Area Edafol & Quim Agr, Orense 32004, Spain

[2] Univ Santiago de Compostela, Fac Biol, Dept Edafol & Quim Agr, Santiago 15782, Spain

来源：

SCIENCE OF THE TOTAL ENVIRONMENT | 2007年 / 378卷 / 1-2期

关键词：

agricultural soils; vineyard; arsenic; sequential extraction; soil use change;

D O I：

10.1016/j.scitotenv.2007.01.026

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Arsenic fractionation has been studied in nine vineyard soils from a wine-producing area in Galicia (NW Spain) characterized by an unusually high As content. Total As concentrations are 7 to 10 times higher the maximum values allowed by the legislation, reaching maximum value of 200 mg kg(-1). The study of As fractionation revealed that those fractions showing strong correlations to crystalline Fe and Al hydrous oxides (r > 0.69, p < 0.01 and r > 0.71, p < 0.01 respectively) represented, on average, higher than the 80% of total As. The low levels of mobile and potentially toxic As fractions (< 4% of total As) suggest that its toxicity is partially minimized in these soils, although the modifications induced by soil management could promote an increase of As availability.(c) 2007 Elsevier B.V. All rights reserved.

引用

页码：18 / 22

页数：5

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