摘要
【目的】了解乌梁素海冰封期污染物的分布特征及污染水平。【方法】于2017年2月初冰封期采集冰样和冰下水样,测试样品的TN、TP以及可溶态重金属Cd、Cr、Cu、Mn、Ni和Zn的质量浓度及分布特征,用单因子指数法和综合污染指数法对乌梁素海冰封期不同相态水体进行了环境质量评价。【结果】乌梁素海在冰封期结冰过程中,污染物由冰体向水体迁移;TP和TN是最主要的污染物因素;重金属分布高值区域出现在湖区南部、湖区出口处,低值区位于湖区中部与东北部;Cu元素和Zn元素个别点位达到《地表水环境质量标准》(GB3838-2002)Ⅱ类标准限值,应引起重视。【结论】结冰会使乌梁素海冰下水体污染加剧,利用该特殊效应,实现湖泊污染治理。
【Objective】In order to understand the distribution characteristics and pollution level of heavy metals in the Wuliangsuhai during the ice-sealing period, ice samples and underwater water samples were collected for analysis in February 2017. 【Method】The concentration and distribution characteristics of TN, TP and soluble heavy metals Cd, Cr, Cu, Mn, Ni and Zn in the samples were measured. The environmental quality of different water phases in Wuliangsuhai during the ice-sealing period were evaluated by single factor index method and comprehensive pollution index method.【Result】 The results showed that pollutants migrated from ice to water during the ice-freezing period in Wuliangsuhai. TP and TN are the main pollutants. The high value of heavy metals occured in the southern part and the outlet of the lake area, while the low value lied in the central and northeastern part of the lake area. Some locations of Cu and Zn elements reached the Class II standard limits of Surface Water Environmental Quality Standard(GB3838-2002), which should cause special concern.【Conclusion】The pollutants disbribution characteristics during the ice-water period might be useful for the remediation of lake water pollution.
作者
李卫平
滕飞
杨文焕
王非
于玲红
LI Weiping;TENG Fei;YANG Wenhuan;WANG Fei;YU Linghong(School of Energy and Environment,Inner Mongolia University of Science and Technology,Baotou 014010,China;Baotou Huimin Water Co.,Ltd.Baotou 014010,China)
出处
《灌溉排水学报》
CSCD
北大核心
2020年第2期122-128,144,共8页
Journal of Irrigation and Drainage
基金
内蒙古科技创新引领项目(KCBJ2018033)
包头科技计划重点领域技术攻关项目(2017Z1009-1)
内蒙古自然科学基金(2018LH04002,2018LH4003)。
关键词
乌梁素海
冰封期
不同相态水体
污染评价
Wuliangsuhai
ice-sealing period
different phase water bodies
pollution assessment
