EFFECT OF SOIL-PH ON ADSORPTION OF LEAD, COPPER, ZINC, AND NICKEL
EFFECT OF SOIL-PH ON ADSORPTION OF LEAD, COPPER, ZINC, AND NICKEL
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DOI：
10.2136/sssaj1983.03615995004700010009x
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发表时间：
1983-01-01
影响因子：
2.9
通讯作者：
HARTER, RD
中科院分区：
文献类型：
--
作者：
HARTER, RD
研究了pH调节土壤对Pb、Cu、Ni、Zn等重金属污染物的吸附和解吸。两种土壤的表层和次表层样品进行了平衡与不同量的Ca（OH）2之前，金属添加。所有4种金属的保留量取决于土壤样品的pH值，在pH 7.0-7.5以上，保留量急剧增加。除镍外，至少70-75%的残留金属可在0.01 N HCl中浸提。镍是有点少提取，与最高pH值的土壤吸附是最少的提取。基于随后的可提取性，所使用的土壤似乎有特定的吸附位点的铅，镍和铜，但很少或没有锌。这些研究提出了一些怀疑的概念，pH值管理固定重金属放在土地上的吸附金属基本上提取0.01M盐酸，这已被用来估计植物土壤离子的可用性。
Pb, Cu, Ni and Zn [heavy metal pollutants] adsorption by and desorption from pH-adjusted soils was studied. Surface and subsurface horizon samples of two soils were equilibrated with varying amounts of Ca(OH)2 prior to metal addition. The amount of all 4 metals retained was dependent upon pH of the soil sample, with retention dramatically increasing above pH 7.0-7.5. With the exception of Ni, at least 70-75% of the retained metal was extractable in 0.01N HCl. Nickel was somewhat less extractable, with that sorbed by the highest pH soils being the least extractable. Based on subsequent extractability, the soils used appeared to have specific adsorption sites for Pb, Ni and Cu but little or none for Zn. These studies cast some doubt on the concept of pH management for immobilizing heavy metals placed on the land in that sorbed metals were substantially extractable by 0.01M HCl, which has been used to estimate plant availability of soil ions.