Heavy Metals in the Soil-Water-Plant System
Heavy Metals in the Soil-Water-Plant System
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DOI：
10.1007/978-1-4613-0405-0_34
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发表时间：
1996
期刊：
影响因子：
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通讯作者：
Huai-man Chen;C. Zheng
中科院分区：
文献类型：
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作者：
Huai-man Chen;C. Zheng
重金属与陆地生态系统中的任何其他化学元素一样，可以溶解在土壤溶液中，吸附在胶体表面上，封闭在土壤矿物质中，与土壤中的其他成分一起沉淀，或掺入生物材料中。这些过程受到许多因素的影响，如土壤pH值，Eh，温度，有机质含量，矿物组成以及其他溶解组分的类型和浓度。此外，重金属在土壤-水-植物系统中的化学行为受到与其他元素和/或土壤组分以及环境条件的相互作用的影响。对相互作用的了解可能有助于更好地理解作物产量和质量与土壤养分水平之间的关系（Ohno和Grunes，1985）。对这些相互作用的研究应引起更多的注意，因为它关系到生态系统平衡、环境质量和人类健康（Chen和Zheng，1992; 1994 b）。然而，直到最近才出现这种情况。为了说明相互作用对土壤-水-植物系统中元素化学行为的影响，我们选择了我们研究小组最近在实验室和温室研究中获得的一些结果（Zheng和Chen 1990; Chenet al.，1991 a，B; Chen和Zheng，1994 a，B; Zanget al.，1987年，1989年）。
Heavy metals, like any other chemical element in a terrestrial ecosystem, may be dissolved in the soil solution, adsorbed onto colloidal surfaces, occluded into soil minerals, precipitated with other components in soil, or incorporated into biological materials. These processes are influenced by many factors, such as soil pH, Eh, temperature, organic matter content, mineralogical compositions as will as the type and concentration of other dissolved constituents. Furthermore, the chemical behavior of a heavy metal in the soil-water-plant system is affected by interactions with other elements and/or soil components and the environmental conditions. The knowledge of the interactions may lead to a better understanding of the relationship between crop yield and quality and the nutrient level of soils (Ohno and Grunes, 1985). Research on these interactions should attract more attention because it relates to ecosystem balance, environment qualities and human health (Chen and Zheng, 1992; 1994b). This, however, has not been the case until recently. To illustrate the effects of interactions on chemical behavior of the elements in soil-water-plant system, some results obtained recently in laboratory and greenhouse studies by our research group were chosen (Zheng and Chen 1990; Chenet al.,1991a,b; Chen and Zheng, 1994a,b; Zanget al.,1987, 1989).