长江口海水和沉积物腐殖质的分析  

Analysis of humus in seawater and sediments in Changjiang Estuary

作　　者：刘启贞[1] 李九发[1] 程栋[2] 陆维昌[2] 李道季[1] 陈邦林[2] 

机构地区：[1]华东师范大学河口海岸国家重点实验室,上海200062 [2]华东师范大学化学系,上海200062

出　　处：《海洋环境科学》2006年第2期13-16,共4页Marine Environmental Science

基　　金：国家自然科学基金项目(50579021);国家重点基础发展研究规划(973)项目(2002CB412405)

摘　　要：通过研究HS-12树脂吸附腐殖质的影响因素,从吸附动力学和界面化学等方面讨论了其吸附机理,并用此方法提取出海水中的腐殖质;同时用重量法测定了沉积物中腐殖质的含量,对河口沉积物中提取的腐殖质进行了化学表征。研究结果表明:当pH为3时,HS-12树脂对腐殖质的吸附量最大;吸附交换速率主要受粒子扩散控制;吸附前后树脂的等电点发生移动,证明此吸附为特性吸附;腐殖质的化学表征说明重量法提取的沉积物中腐殖质纯度较高,同时证明腐殖质的多种官能团的存在。长江口海区的海水腐殖质浓度平均值为0.280mg/L;沉积物中腐殖质的含量平均值为2748×10-6。In this paper, based on the adsorption kinetic experiments and interfacial chemistry experiments, the adsorption mechanism and the influence factors of adsorption humus by HS-12 resin have been studied. Humus in seawater of Changjiang Estuary is extracted by this method. At the same time, humus in sediments which is measured by weighing method is characterized by UVVIS and IR spectrum. The results show that the maximum adsorption capacity by using HS-12 resin can be obtained when pH = 3; the velocity of exchange is controlled by particle diffusion; the adsorption belongs to a characteristic adsorption because the IEP of the HS-12 resin has been moved. The average concentration of humus in seawater is 0.280mg/L; while in sediments it is 2748 × 10^（-6）.

关 键 词：腐殖质 吸附机理 长江口 沉积物 

分 类 号：P736.4[天文地球—海洋地质]