污染底质颗粒分析与铅、镉吸附特性的研究  

Study on Polluted Sediment Particle Analysis and Lead and Cadmium Absorption Characteristics

作　　者：贝荣塔[1,2] 胡慧蓉[1] 齐丹卉[1] 杨能[1] 

机构地区：[1]西南林业大学环境科学与工程系,云南昆明650224 [2]昆明理工大学环境科学与工程学院,云南昆明650093

出　　处：《环境科学导刊》2010年第6期1-4,共4页Environmental Science Survey

基　　金：西南林学院重点基金资助(200607Z)

摘　　要：通过对矿区选矿废水污染河流的底质进行采样分析,探讨了底质颗粒物粒径与质量分数的关系及其铅、镉的吸附特性。结果表明,底质中颗粒物粒径质量分数在垂直方向上无明显区别,但粒径间有显著的区别,其质量分数可分为3种类型。铅、镉吸附量随着污染底质颗粒的变小而增加,呈负相关关系。底质中铅、镉吸附贡献率具有相似的特性,两条贡献率曲线几乎是一致的,呈"双峰型",最大吸附贡献率出现在粒径为2mm^710μm和500~250μm处,粒径710~500μm处有一低谷。特别要强调的是:河流底质铅、镉污染严重,清理底质使河流免遭二次污染十分必要。The relations between the sediment particle size and mass ratio were discussed as well as the absorption characteristics of lead and cadmium based on sampling and analyzing the sediment from a river polluted by oredressing wastewater in a mine area. The results indicate that there were not obvious differences among the sediment particle size and the mass ratios in vertical, while there were significant differences among the particle sizes and the mass ratios which were divided to three kinds of types. The correlation between lead and cadmium absorption con- tent and the particle size is negative. The contribution ratios of two kinds of metal are similar with the very similar contribution ratio curves showing double-hump type. The contribution ratio peaks at the points of 2mm-710μm and 500μm-250μm of particle size, while it reaches the lowest point at 710μm-500μm. Therefore, it is very necessary to clear the sediment avoiding secondary pollution to the river.

关 键 词：污染底质 质量分数 铅吸附特性 镉吸附特性 

分 类 号：X13[环境科学与工程—环境科学]