天然有机物对腐蚀铅表面形态及含铅颗粒行为的影响。

Influence of natural organic matter on the morphology of corroding lead surfaces and behavior of lead-containing particles.

作者信息

Korshin Gregory V, Ferguson John F, Lancaster Alice N

机构信息

Department of Civil and Environmental Engineering, University of Washington, P.O. Box 352700, More Hall 305, Seattle, WA 98195-2700, USA.

出版信息

Water Res. 2005 Mar;39(5):811-8. doi: 10.1016/j.watres.2004.12.009.

DOI:10.1016/j.watres.2004.12.009

PMID:15743626

Abstract

Influence of natural organic matter (NOM) on the morphology of lead surfaces exposed to drinking water and on the properties of lead-containing colloidal particles was explored based on the data of scanning electron microscopy, sequential filtrations, measurements of particle size distributions and electrophoretic potential. It was demonstrated that NOM prevented the formation of cerussite and hindered the growth of hydrocerussite crystals. Measurements of zeta-potential showed that the surface activity was highest for unaltered NOM, while ozonation and chlorination decreased it. The concentrations of soluble lead and tin increased several fold in the presence of NOM, while large colloidal particles of lead and solder corrosion products tended to break down to form smaller fragments. It is suggested that these phenomena are important for understanding of lead release mechanisms in drinking water.

摘要

基于扫描电子显微镜数据、连续过滤、粒度分布测量和电泳电位测量，探讨了天然有机物（NOM）对暴露于饮用水中的铅表面形态以及含铅胶体颗粒性质的影响。结果表明，NOM可防止白铅矿的形成并阻碍水白铅矿晶体的生长。ζ电位测量表明，未改变的NOM表面活性最高，而臭氧化和氯化作用会降低其表面活性。在NOM存在的情况下，可溶性铅和锡的浓度增加了几倍，而铅和焊料腐蚀产物的大胶体颗粒倾向于分解形成更小的碎片。建议这些现象对于理解饮用水中铅的释放机制很重要。