荆江三口疏浚泥资源化利用研究

Reasearch on Resource Utilization of Dredged Mud in the Three Outlets of Jingjiang River

文章通过对荆江三口地区枯水期疏浚泥的颗粒特性、化学成分、营养成分以及毒性等特性进行分析,综合评价了潜在生态风险,并对其资源化利用途径进行探讨研究。结果表明,荆江三口疏浚泥表现为黏土质砂,主要污染重金属含量均低于国家土壤标准风险筛选值,重金属潜在生态风险系数低。疏浚泥中总氮、有机质含量不足,总磷含量中等,营养成分尚不能满足农作物生长,适用于土地绿化利用,且从化学成分来看,可以满足制砖等建材利用。

This paper analyzes the particle characteristics,chemical composition,nutrient content,pollutant content and other properties of the dredged mud in the three rivers of the Jingjiang River during dry season,and evaluates potential ecological risks comprehensively,then explores its resource utilization.The results show that the dredged mud in the three outlets of the Jingjiang River mainly consists of clay-like sand,the content of polluted heavy metals is lower than the soil standard risk screening value,the potential ecological risk coefficient is low.Due to insufficient total nitrogen and organic matter content,The dredged mud is still not enough for the growth of farm crops,even containing moderate total phosphorus.However could be used for land greening.Also could meet the needs of building materials such as brick making considering the perspective of chemical composition.