【摘要】 <正> 锌属于生命元素,其含量是重要的水质指标之一,过多或缺乏锌均能引起不良的生物效应,损害人体健康。寻求锌的水环境背景值及其在天然水体中的正常含量能提供衡量水污染的程度,判断水质状况。本工作研究湘江水系和京津地区河流中锌的水环境背景值,为水质评价、研究其地球化学过程和合理利用水资源提供科学依据。更多还原

【Abstract】 Zinc is an important element for life. Studying iti background values in aquatic environment is significant for evaluation of water quality. This work describes that zinc contents in water samples taken from Xiangjiang River in Hunan Province and from from the rivers in Beijing-Tianjin area have been analysed by flame AAS. The distribution types of background values of zinc were handled by mathematical statistic method. The results show that the background values of zinc in the waters above mentioned are in normal ranges compared with world levels. The chemical speciation of zinc in water and sediments of Xiangjing River were studied as well. ASV-labile zinc in dissolved zinc were found as predominant forms in water. The bound to Fe-Mn oxides are major speciations of Zn in the sediments except residual. The background values of zinc and its different species in; water are mainly affected by its geochemical charater and environmental factors.更多还原