RELATIVE DISTRIBUTION OF POLLUTANTS FROM URBAN CANAL AND AQUACULTURE FARM ONTO NATURAL WETLAND OF PHNOM PENH, CAMBODIA

Q4 Environmental Science
R. Chan, T. Sok, S. Bun, V. Kaing, M. Mong, C. Oeurng
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Abstract

Under the rapid development of Phnom Penh, the pollutants control from different sources intothe main natural wetland, Tamouk lake is consequentially required for its ecosystem as well as thesustainable development. Therefore, this work aims to investigate the distribution of thepollutants from the urban canal and aquaculture farm to Tamouk lake through the analysis ofwater quality in both dry and rainy seasons. Twelve sampling sites, i.e., two from urban canals, onefrom aquaculture farm, and nine from the investigated lake, were selected for their water qualityassessment. As the results from both seasonal analyses, the maximum concentrations of totalsuspended solids (TSS), chemical oxygen demand (COD), and ammonia (NH3+) of the effluentfrom aquaculture farm and urban canal to the lake range of 107-134 mg l-1, 76-184 mg l-1, and 8.5-14.9mg l-1 in the dry season and 105-263mg l-1, 75-140 mg l-1, and 7.5-9.2 mg L-1in the rainy season,respectively. In addition, TSS and COD in the lake were only 72-93 mg l-1and 46-77mg l-1 of bothseasons, respectively, whereas NH3+ was estimated to be 7-14 times lower than that in urban canaland aquaculture farms. According to the result analysis, the lake’s water pollution was mainlycontributed by the discharge from the urban canal and aquaculture farm in both seasons. Higherrelease of pollutants from many sources during the rainy season could compensate for rainwater’sdilution effect, resulting in the high remaining of organic and nitrogen in lake water. Hence, toreduce the risk of the lake water to humans and ecosystems, the effluent from aquaculture farmsand urban water is highly suggested to have a proper treatment before discharging to the lake.
柬埔寨金边城市运河和养殖场污染物在自然湿地上的相对分布
在金边快速发展的背景下,控制来自不同来源的污染物进入主要天然湿地——塔穆克湖是其生态系统和可持续发展的必然要求。因此,本研究旨在通过旱季和雨季的水质分析,调查城市运河和养殖场对Tamouk湖的污染物分布情况。选取城市水渠2个、水产养殖场1个、调查湖泊9个采样点进行水质评价。两季分析结果均表明,养殖场和城市运河入湖废水中总悬浮物(TSS)、化学需氧量(COD)和氨(NH3+)的最大浓度在旱季为107 ~ 134 mg l-1、76 ~ 184 mg l-1和8.5 ~ 14.9mg l-1,雨季为105 ~ 263mg l-1、75 ~ 140 mg l-1和7.5 ~ 9.2 mg l-1。此外,两季湖泊TSS和COD分别仅为72 ~ 93 mg l-1和46 ~ 77mg l-1, NH3+比城市沟渠养殖场低7 ~ 14倍。结果分析表明,两季湖泊水质污染主要来源于城市水渠排放和养殖场排放。在雨季,来自许多来源的污染物的高释放可以补偿雨水的稀释效应,导致湖水中有机和氮的高残留。因此,为了减少湖水对人类和生态系统的危害,强烈建议养殖场和城市污水在排入湖水之前进行适当的处理。
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来源期刊
Pollution Research
Pollution Research Environmental Science-Water Science and Technology
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期刊介绍: POLLUTION RESEARCH is one of the leading enviromental journals in world and is widely subscribed in India and abroad by Institutions and Individuals in Industry, Research and Govt. Departments.
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