河道淤泥疏浚和底泥污染评价研究——以三亚市某河道为例  

Study on Dredging and Evaluation of River Sediment——Case Study of Rivers in Sanya,China

作　　者：孙淑雲 陈晓芳 刘广兵[1] SUN Shu-yun;CHEN Xiao-fang;LIU Guang-bing(Jiangsu Provincial Institute of Environmental Sustainability,State Environmental Protection Key Laboratory of Aquatic Ecosystem Health in the Middle&Lower Reaches of Yangtze River,Nanjing 210036,China)

机构地区：[1]江苏省环境科学研究院,国家环境保护长江中下游水生态健康重点实验室,南京210036

出　　处：《四川环境》2024年第4期33-40,共8页Sichuan Environment

基　　金：江苏省省属公益类科研院所自主科研经费资助项目(GYYS2022103,GYYS2023106)。

摘　　要：为选择更有效更环保更经济的底泥清淤方式及淤泥处置方案,研究采用平行断面法和潜在生态危害指数法调查和分析了三亚市某河道的沉积物营养盐、有机质及重金属污染特征及污染程度,并根据污染程度初步确定是否需要清淤、清淤范围、深度和工程量。结果表明:(1)河道的底泥主要受到有机质和总磷污染,对水体的富营养化有潜在影响。(2)清淤淤泥富含有机质、氮、磷等营养元素,是一种优质的土壤改良剂。河道底泥中重金属的含量均符合《绿化种植土壤》(CJ/T340-2016)I级标准限值,清淤出的底泥可以直接或者经过干化处理后作为绿化种植土,用于园林绿化的土壤改良剂或客土置换。河道清淤的全过程研究对于其他河道淤泥监测评估及相应清淤疏浚施工及淤泥资源化处置方式的选择提供参考借鉴。In order to select a more effective,environmental friendly and economical sediment dredging method and sludge disposal schemes,this study used the parallel section method and the potential ecological risk index method to investigate and analyze the sediment nutrient,organic matter and heavy metal pollution characteristics and pollution degree of rivers in Sanya,China,and according to the degree of pollution to determine the necessity,scope,depth and quantity of dredging.This paper drew the following conclusions:(1) The sediments of monitoring rivers in Sanya were mainly polluted by organic matter and total phosphorus,which had potential impacts on eutrophication of river water;and(2) the dredged sludge was rich in nutrients such as organic matter,nitrogen and phosphorus,and was a high-quality soil conditioner.The content of heavy metals in the sediment of the rivers was in line with the Class I limit of Green Planting Soil(CJ/T340-2016).The dredged sediment can be used as soil amendment or soil replacement for landscaping.In this paper,the whole dredging process research for the work of the other similar river has a certain reference value and significance.

关 键 词：河道清淤 营养盐 重金属 淤泥处理处置 

分 类 号：X703[环境科学与工程—环境工程]