重金属污染农田土地整理技术研究

以福建长乐基本农田示范区为研究区域,通过采集整理土样数据,运用"3S"技术建立土壤环境质量数据库,并依据国家标准,完成农田环境质量现状调查与评价。之后结合土地整理工程需要,与各种土壤重金属污染修复方法的适用范围和经济技术可行性相比较,确定采用客土换土的综合整理修复方法,最后按照综合整理修复效果评价体系进行修复后评价。评价结果表明:研究区内作物单产、土地利用率等土地整理指标均有提高;重金属污染面积减少7.81 hm2,污染修复率达到39.41%,实现了在改善土壤环境质量的同时,提高土地的利用率。

Rehabilitation of Farmland Contaminated by Heavy Metal: A Case Study of Land Consolidation

With the support of 3S technology to process and analyze the data of the land information including soil contaminated by heavy metals through a series of investigations,inter alia,soil sampling and analysis,a farmland database of Changle’s County in Fujian Province was set up and conditions of heavy-metal-contaminated soil of the County’s farmland were evaluated referring to the relevant national soil environmental quality standard.The paper also described the land consolidation project conducted in this County,during which rehabilitation of heavy-metal-contaminated soil was carried out.Evaluation was done as well regarding the rehabilitation,result of which showed that 7.81 hm2 of contaminated farmland was cut down and the rate of soil rehabilitation reached 39.41%.