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SOIL HEAVY METAL CONTAMINATION AND PRACTICAL APPROACHES TO REMEDIATION IN SOME PARTS OF CHINA

机译:土壤重金属污染和中国某些地区修复的实用方法

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This paper mainly deals with the current status of soil contamination with heavy metals, sources of pollutants, and some practical approaches to reduce metal contents in the food chain and soil remediation accepted by Chinese farmers. For the whole country, soil contamination is not an important issue but in some individual sites, e.g., mining, industrial sites, or areas with wastewater irrigation, heavily contaminated soils have been found. The metals are usually from untreated wastewater irrigation, sewage sludge, industrial or domestic waste disposal, or metal-containing agrochemical application in agriculture, e.g. Cd-abundant phosphates, besides atmospheric deposition of metal dusts in the vicinity of industrial areas. In regards to soil remediation for such a country with a large population as in China, keeping high output or production of enough food from agriculture is still a bottleneck-like problem. To prevent food contamination from polluted soil, a series of practical approaches has been developed. Among them, non-edible crop growth, exploiting as breeding sites, choosing tolerant crops, etc. have showed a wide acceptability and benefit to farmers before a more hopeful approach, e.g., phytoremediation is put into practice.
机译:本文主要涉及土壤污染与重金属,污染源的目前地位,以及减少中国农民接受的食品链中的金属含量的一些实用方法。对于整个国家,土壤污染不是一个重要问题,而是在一些个别地点,例如,矿业,工业场所或污水灌溉的地区,已经发现了严重受污染的土壤。金属通常来自未经处理的废水灌溉,污水污泥,工业或国内废物处理,或在农业中含金属的农业化学应用,例如,除了在工业区附近的金属粉尘大气沉积的CD丰富磷酸盐。关于土壤修复如中国人口较大的国家,保持高产量或生产足够的农业食品仍然是一个类似瓶颈的问题。为防止污染土壤污染,已经开发了一系列实用方法。其中,在更有希望的方法之前,不可食用的作物生长,选择耐药地点,选择耐受作物等对农民的广泛可接受性和利益受益匪浅..植物修复投入实践。

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