珠江口红树林湿地海水重金属污染评价及分析

发布时间：2018-01-28 21:36

本文关键词： 珠江口红树林海水重金属评价影响　出处：《华南师范大学学报(自然科学版)》2016年05期 　论文类型：期刊论文

【摘要】：海水重金属是海洋环境质量评价体系中的重要因子,目前珠江口重金属污染问题突出,红树林湿地面积减少,为保护红树林海域环境、改善海水质量,探讨红树林湿地海水重金属的影响因子,对珠江口南沙红树林湿地、淇澳红树林保护区和深圳红树林保护区进行海水采集.通过电感耦气等离子体发射光谱仪(ICP-OES)测定样品中Hg、Cd、Pb、Cr、As、Cu、Zn含量,并基于综合指数法评价海水质量.重金属含量分析与评价结果表明:珠江口红树林湿地海水重金属含量居前的元素是Pb、As、Cd、Hg,含量较少的是Cr、Cu、Zn;综合3个研究区域单项重金属元素的污染程度,由高到低排序为:Hg、Cd、Pb、As、Cu、Cr、Zn;南沙红树林湿地、淇澳红树林保护区、深圳红树林保护区综合指数分别是2.132、13.074、6.398,南沙红树林湿地海水重金属污染为中度污染水平,淇澳、深圳红树林保护区海水重金属污染为严重污染水平;地理位置、潮位流速、红树林湿地生态系统、产业活动影响红树林湿地海水重金属污染程度,而水质要素对红树林海水重金属影响机理较为复杂,需进一步探讨.文中评价珠江口红树林湿地海水重金属污染程度,探讨其影响因子,对保护珠江口红树林湿地有参考价值.
[Abstract]:Heavy metals in seawater is an important factor in marine environmental quality evaluation system. At present, the pollution of heavy metals in the Pearl River Estuary is prominent, and the area of mangrove wetland is reduced, in order to protect the environment of mangrove sea area and improve the quality of sea water. To study the influencing factors of heavy metals in mangrove wetland and Nansha mangrove wetland in Pearl River Estuary. The seawater samples were collected from Qiao mangrove reserve and Shenzhen mangrove reserve. The samples were determined by inductively coupled gas plasma emission spectrometer (ICP-OES). The results of the analysis and evaluation of the heavy metal contents in the seawater of mangrove wetland in the Pearl River Estuary show that the most important element in the seawater is PbBU, As-CD, which is the most important element in the mangrove wetland of the Pearl River Estuary. Hg, the content of Cr-CuZN is less than that of Cr-CuZN; According to the pollution degree of single heavy metal elements in three study areas, the order from high to low is: 1. The comprehensive indices of Nansha mangrove wetland, Qiao mangrove reserve and Shenzhen mangrove reserve are 2.132n13.074n6.398 respectively. Heavy metal pollution in Nansha mangrove wetland was moderate, and heavy metal pollution was serious in Qiao and Shenzhen mangrove reserve. Geographical location, tidal level velocity, mangrove wetland ecosystem, industrial activities affect the degree of heavy metal pollution in mangrove wetland seawater, while water quality factors affect the mechanism of mangrove seawater heavy metals is more complex. The paper evaluates the pollution degree of heavy metals in the mangrove wetland of Pearl River Estuary and discusses its influencing factors, which has reference value for protecting mangrove wetland in Pearl River estuary.
【作者单位】：华南师范大学地理科学学院;中国林业科学研究院热带林业研究所;
【基金】：国家自然科学基金项目(41271060,41176084) 广州市林业和园林局项目(2014-7)
【分类号】：X55
【正文快照】： grove wetlands,but the seawater quality factors that impacted heavy metals in mangrove seawater is complex,and itis required further research.The pollution of heavy metals in mangrove seawater of the Pearl River Estuary is evalu-ated in this paper,and it

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