Karpagavalli M Sridevi, Malini P, Ramachandran A
Centre for Climate Change and Adaptation Research, Anna University, Chennai--600 025, India.
J Environ Biol. 2012 Jul;33(4):757-61.
Pallikaranai wetland has high ecological significance as it has been a home for other associated biodiversities. This wetland is highly polluted due to the rapid industrialization, urbanization and dumping of solid waste. The water quality of the Pallikaranai wetland has been studied with reference to toxic metals. The metals analyzed include lead, chromium, iron, copper, nickel, zinc and cadmium. The heavy metal analysis in surface waters were in the following range; Cd: BDL--0.019 mg l(-1), Fe: BDL--1.52 mg l(-1), Cu: BDL--0.02 mg l(-1), Ni: BDL-0.60 mg l(-1), Pb: 0.03-1.13 mg l(-1), Zn: 0.002-0.14 mg l(-1) and Cr: 0.10-1.52 mg l(-1) respectively. The dominance of various heavy metals in the surface water of the Pallikaranai wetland followed the sequence: Pb > Cr > Fe > Ni > Zn > Cd > Cu. The quality of water has deterioted due to the various anthropogenic activities. Most of the metal ions were in higherconcentration compared to the standards. It has been observed that the quality of the surface water is not safe for aquatic and domestic life, hence necessary management actions should be taken to control the quality of the surface water.
帕利卡兰奈湿地具有很高的生态意义，因为它是其他相关生物多样性的栖息地。由于快速工业化、城市化以及固体废物倾倒，这片湿地受到了严重污染。已针对有毒金属对帕利卡兰奈湿地的水质进行了研究。分析的金属包括铅、铬、铁、铜、镍、锌和镉。地表水的重金属分析结果如下：镉：低于检测限（BDL）至0.019毫克/升，铁：低于检测限至1.52毫克/升，铜：低于检测限至0.02毫克/升，镍：低于检测限至0.60毫克/升，铅：0.03至1.13毫克/升，锌：0.002至0.14毫克/升，铬：0.10至1.52毫克/升。帕利卡兰奈湿地地表水中各种重金属的优势顺序为：铅＞铬＞铁＞镍＞锌＞镉＞铜。由于各种人为活动，水质已经恶化。与标准相比，大多数金属离子的浓度较高。据观察，地表水的质量对水生生物和家庭生活不安全，因此应采取必要的管理措施来控制地表水的质量。
