【摘要】 利用从珠江莲花山河段采集的淡水和大洋海水经过滤后，按不同盐度混合，模拟河口咸淡水交汇区重金属在水中各微粒级的分配特征。实验结果表明，在各种盐度条件下，Ｆｅ，Ａｌ，Ｃｕ，Ｐｂ，Ｚｎ和Ｃｄ主要以粒径＞１．０μｍ和＜０．２２μｍ的微粒存在于水中。在加入Ｆｅ（３＋），Ａｌ（３＋）模拟实验中，重金属绝大部分含量形成粒径＞１．０μｍ的微粒，其中Ｆｅ达９９％以上，Ｃｕ，Ｐｂ约９５％，Ａｌ约有７０％－９０％，Ｃｄ约４０％，其余部分主要以＜０．２２μｍ微粒存在。加入与未加入Ｆｅ（３＋），Ａｌ（３＋）的实验比较，Ｆｅ（３＋），Ａｌ（３＋）的加入对水中Ｃｕ，Ｐｂ，Ｚｎ和Ｃｄ含量向大微粒聚集有很大影响，使其聚集在粒径＞１．０μｍ微粒的量增加３０％－４０％。另外从实验结果和理论分析可知，水的盐度与重金属在位径＜１．０μｍ微粒中的含量分布无明显关系，但咸水中大量离子将对河水中胶体絮凝和微粒增长有重大影响。更多还原

【Abstract】 This paper presents results of simulated tests on distribution characteristics from heavy metal particle sizes in the mixing zone of fresh and salty water in the estuary, inorder to study the self-cleaning effects of heavy metals.The results show that in various salinity conditions, the particle sizes for Fe, Al,Cu, Pb, Zn and Cd are mainly >1. 0μm and <0. 22μm in water; in the simulated test with Fe3+ and Al3+ input, the partcle sizes of heavy metals are mainly >1.0μm, in which Fe accounts for more than 99%, Cu and Pb 95%, Al 70-90% and Cd 40%,respectively, the residue mainly exist in <0. 22μm in water; in addition,from the test results of Fe3+, Al3+ input in comparison to that without Fe3+, Al3+ input,the particle sizes >1. 0μm for Cu, Pb, Zn and Cd in water can be increased by 30-40%.更多还原