东寨港退塘还林区沉积物重金属污染评价  

The Evaluation of Heavy Metals in Sediment of Pond-to-mangrove Region in Dongzhaigang

作　　者：田蜜 方赞山 黄丹慜 岑选才 陈旭 Tian Mi;Fang Zanshan;Huang Danmin;Cen Xuancai;Chen Xu(Hainan Academy of Forestry(Hainan Academy of Mangrove),Haikou Hainan 571100;Haikou Wetland Protection Engineering Technology Research and Development Center,Haikou Hainan 571100)

机构地区：[1]海南省林业科学研究院(海南省红树林研究院),海南海口571100 [2]海口市湿地保护工程技术研究开发中心,海南海口571100

出　　处：《热带林业》2024年第2期88-92,共5页Tropical Forestry

基　　金：海南省省属科研院所技术创新专项(SQKY2022-0022)“不同退塘还林模式生态修复效果评价研究”。

摘　　要：通过采集东寨港不同退塘还林生态修复区域及周边天然红树林表层沉积物样品,测定分析了沉积物中Cr、Cu、Zn、Cd、Pb、As、Hg含量,探讨了重金属分布及污染特征,并评价了重金属的污染程度和潜在生态风险。结果表明:研究区域表层沉积物中除Cr外,其余重金属含量均符合《海洋沉积物质量》第一类标准;从污染指数看,仅Cr单因子污染指数稍高,各样地的综合污染指数均小于5,整体污染水平较低;地累积指数评价法结果显示该区域未受到各重金属污染;根据潜在生态风险评价结果,各样地重金属综合潜在生态风险指数均远小于150,表层沉积物重金属的潜在生态风险程度较轻,属于低风险范畴。研究可为下一步退塘还林生态修复评估等工作提供基础资料和理论依据。Through analyzing the quantity of Cr,Cu,Zn,Cd,Pb,As,and Hg in sediments collected from different pond-to-mangrove ecological restoration areas in Dongzhaigang and the surface of the nearby natural mangroves,we probed the distribution of the heavy metals and its pollution characteristics,and evaluated the pollution level and potential ecological risks.The results showed that the content of heavy metals in the sediments in the research areas was qualified as Grade I of Marine Sediment Quality,except Cr.In terms of pollution index,the overall pollution level was low(the composite index of each plot<5),within which the single index of Cr was slightly higher than the other heavy metals.In terms of geo-accumulation index,the areas had not been polluted by heavy metals.In terms of comprehensive potential ecological risk index,the pollution risk of the heavy metals in the sediments in each area was categorized into light degree,with the index significantly lower than 150.This study could provide basic data and a theoretical basis for further ecological restoration assessment.

关 键 词：退塘还林 表层沉积物 重金属 污染评价 

分 类 号：P736.41[天文地球—海洋地质]