Extractability and Mobility of Copper and Zinc Accumulated in Sandy Soils

ZHANG Ming-Kui; HE Zhen-Li; D.V.CALVERT; P.J.STOFFELLA

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Extractability and Mobility of Copper and Zinc Accumulated in Sandy Soils

机译：沙质土壤中积累的铜和锌的萃取性和迁移率

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Extractability and mobility of Cu and Zn and their relationships with 1) accumulation of Cu and Zn and 2) soil pH were studied in three sandy soils (Wabasso, Ankona, and Winder) from commercial citrus groves in Florida, USA. The soils, with a broad range of Cu and Zn concentrations, were fractionated by a modified procedure of Amacher, while Cu and Zn mobility were evaluated using column leaching. The extractability of Cu and Zn increased with decreasing soil pH. Also with increasing total soil Gu and Zn for extractable Cu in the Wabasso sand a threshold level, where the metal extraction rate increased, was noted at 100 mg kg-1, whereas for extractable Zn in the Wabasso sand the threshold level was found at 60 mg kg-1 and in the Ankona sand at 120 mg kg-1. These results suggested that the release potential of Cu and Zn was greater in the Wabasso sand than in the Ankona sand. The column leaching experiment showed that at total soil Cu or Zn concentrations ＜ 100 mg kg-1 all leachates had low Cu and Zn concentrations. However at total concentrations ＞ 200 mg kg-1 for Cu and ＞ 150 mg kg-1 for Zn with decreasing soil pH, the concentrations of both Gu and Zn in the leachates increased exponentially. Also in these sandy soils soluble Cu and Zn mainly originated from the exchangeable fractions, and pH was a key factor controlling Cu and Zn extractability and mobility.

机译：在美国佛罗里达州商业柑桔园的三种沙质土壤（Wabasso，Ankona和Winder）中研究了Cu和Zn的可萃取性和迁移率及其与1）Cu和Zn积累以及2）土壤pH的关系。通过改良的Amacher程序对具有广泛的Cu和Zn浓度的土壤进行分级，同时使用柱浸法评估Cu和Zn的迁移率。铜和锌的提取率随土壤pH值的降低而增加。同样，随着土壤总Gu和Zn的增加，Wabasso砂中的可提取Cu的阈值水平达到100 mg kg-1，而Wabasso砂中的可提取Zn的阈值水平达到60 mg / kg。毫克公斤-1，在安科纳沙中的浓度为120毫克公斤-1。这些结果表明，Wabasso砂中的铜和Zn的释放潜力大于Ankona砂中的。柱浸实验表明，在土壤总铜或锌浓度＜100 mg kg-1时，所有渗滤液的铜和锌浓度均较低。然而，随着土壤pH值的降低，Cu的总浓度> 200 mg kg-1和Zn的> 150 mg kg-1时，渗滤液中Gu和Zn的浓度均呈指数增加。同样在这些沙质土壤中，可溶性铜和锌主要来自可交换部分，pH是控制铜和锌可萃取性和迁移率的关键因素。

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《土壤圈（英文版）》 |2006年第1期|43-49|共7页
作者
ZHANG Ming-Kui; HE Zhen-Li; D.V.CALVERT; P.J.STOFFELLA;
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作者单位

Department of Natural Resource Sciences, College of Natural Resource and Environmental Sciences, Zhejiang University, Huajiachi Campus, Hangzhou 310029 (China);

University of Florida, Institute of Food and Agricultural Sciences, Indian River Research and Education Center, Fort Pierce, FL 34945-3138 (USA);

University of Florida, Institute of Food and Agricultural Sciences, Indian River Research and Education Center, Fort Pierce, FL 34945-3138 (USA);

University of Florida, Institute of Food and Agricultural Sciences, Indian River Research and Education Center, Fort Pierce, FL 34945-3138 (USA);

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收录信息中国科学引文数据库(CSCD);
原文格式 PDF
正文语种 chi
中图分类农业基础科学;
关键词
copper; extractability; mobility; water quality; zinc;

机译：铜;可萃取性;迁移率;水质;锌;

Extractability and Mobility of Copper and Zinc Accumulated in Sandy Soils

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