再生金属工业园区土壤重金属污染特征及来源分析

Pollution Characteristics of Heavy Metal and Source Analysis in Metal Recycling Industrial Park

[目的]为了揭示土壤中锌、铜、铅、镍的分布状况及污染情况.[方法]以路桥峰江再生金属工业园区域土壤中锌、铜、铅、镍为主要研究对象,通过系统的土壤取样调查,研究园区土壤锌、铜、铅、镍的空间结构和分布规律.[结果]随着与园区距离的增加,土壤铅、锌、铜、镍含量呈显著下降趋势.由于铅、锌、铜、镍都受到工业活动的影响,它们的分布特征几乎一致.这与该区工业类型单一性和工厂布局的聚集性有关,园区西部方向土壤受污染程度要比东部方向重.园区东西方向100 m内土壤铅污染程度较重,是土壤国家二级标准的1.86 ～5.25倍,已不适宜用于农业种植、畜牧等用途.[结论]该研究可以为后续土壤环境质量评价或治理提供参考.

[ Objective ] The research aimed to study the distribution status and pollution condition of zinc, copper, lead and nickel in the soil. [ Method ] Zinc, copper, lead and nickel in the soil of metal recycling industrial park, Luqiao Fengjiang were taken as study objects. Through the systematically sampling and survey of the soil, the spatial structure and distribution law of zinc, copper, lead and nickel in the soil were studied. [ Result] With the increase of the distance from the park, the content of lead, zinc, copper and nickel in soil showed a significant downtrend. Because lead, zinc, copper and nickel were affected by industrial activities, their distributions were almost the same, which were related to the simplicity of the industrial type and the aggregation of plant layout. Soil polluted degree at park west direction was heavier than that at the east direction. In 100 m of park east and west direction, lead pollution in the soil was heavy, which was 1.86 -5.25 times of the national second standards of soil. It wasn＇ t suitable for farming, animal husbandry and other purposes. [ Conclusion] The research could provide the reference for the quality evaluation and the management of the soil condition in the future study.