慢速渗滤土地处理系统中优先有机物的迁移、归宿与生态风险

Transformation, fate and ecological risk of priority organic pollutants in slow rate land treatment system of west Shenyang

研究了沈阳西部城市污水慢速渗滤土地处理系统中优先有机污染物的迁移和残留情况，结果表明，土地处理系统和当地传统污灌区耕作层土壤、地下水中的优先有机污染物的总含量分别高于对照区（清水灌区）１倍和４倍以上；系统出水、地下水和传统污灌区地下水中的优先有机污染物的浓度有相似的分布、说明污灌水中的有机污染物对土壤和地下水产生一定程度的影响，但土地处理系统和当地传统污灌区生产的大米中，优先有机污染物含量与对照区相比未见显著差异．

The transformation and residues of priority organic pollutants in SR-LTS (Slow Rate Land Treatment System) of west Shenyang were studied in this paper. The results show that total contents of priority organic pollutants in culticated soil of SR-LTS and traditional wastewater irrigation areas and underground water are one and four times higherthan those in control area, respectively. And there is a very similar distribution of priority organic pollutants in effluent, underground water of SR-LTS and traditional wastewater irrigation areas. It is suggested that organic pollutants in irrigating wastewater have an influence on soil and underground water. However, no obvious difference in priority organic pollutant contents in rice grain produced under the treatments of SR-LTS, traditional wastewater irrigation and clean water irrigation is detected.