水体溶解有机质富集分离方法的研究进展

ADVANCES IN RESEARCH ON THE METHODS OF CONCENTRATING AND ISOLATING DISSOLVED ORGANIC MATTER IN AQUATIC WATER

溶解有机质,作为全球碳循环的主要组成部分,在水生生态系统的各种物理、化学和生物过程中扮演着非常重要的角色。富集分离溶解有机质是研究其化学特征和环境地球行为的必要前提。在总结XAD树脂分离技术在溶解有机质富集分离的基础上,本文对其它三种常用的分离方法—二乙氨基乙基纤维素(DEAE)吸附分离法、超滤(UF)分离法以及反渗透(RO)分离法进行了综述。介绍了各分离方法的分离原理、分离流程、存在的优缺点及应用范围。最后对超滤或反渗透与XAD树脂相结合的联用技术在溶解有机质环境地球化学研究中的应用前景进行了展望。

Dissolved organic matter （DOM）, as an important component involved in carbon cycle, plays a significant role in physical, chemical and biological processes in the aquatic ecosystem. To concentrate and isolate DOM is often necessary for understanding its characteristics and environmental geochemical behavior. In the previous paper, we summarized the concentration and isolation of DOM by the XAD resin isolation method. In this paper, another three commonly used isolation methods such as dieth-ylaminoethyl （DEAE） cellulose, ultrafiltration （UF） and reverse osmosis （RO） were reviewed. On the basis of analyzing the separation theory and general process, the advantages and disadvantages were compared and their application fields were also summarized. Finally, the combined technology of ultrafiltration or reverse osmosis and XAD resin isolation methods was emphasized and their applications in the study of DOM in environmental geochemistry were prospected.