Fe(OH)_3胶体与铜离子作用的研究

STUDY OF INTERACTION OF Cu^(2+) WITH COLLOIDAL Fe(OH)_3

使用切向流超滤系统得到粒度较均匀的Fe(OH)3胶体,进而对Fe(OH)3胶体粒子与Cu2+的作用进行了研究,并将实验结果与南沙群岛海区表层水中铜与胶体物质结合状况的调查数据进行了比较分析,得到如下结果:(1)在海水介质中,铜在Fe(OH)3胶体上结合的百分率(pH>5)随pH的升高而下降,随着Fe(OH)3胶体浓度的减小而下降?(2)在天然海水介质中,使铜在Fe(OH)3胶体上结合的百分率在50%-70%的有机物浓度为1.0mg·L-1,有机物浓度的增大使铜与无机胶体结合的百分率有下降的趋势?

Colloidal Fe(OH)3 of homogenenous particle size was isolated by using cross-flow filtration system and the interaction of colloidal Fe(OH)3 with Cu2+ were experimentally studied. The experiment results were analyzed and compared with the data of colloidal copper in the surface water of Nansha Islands sea area. The results were as follows. (1) In seawater medium, the percentage of copper binding to colloidal Fe(OH)3 decreased with the increase of pH in high pH range and with the decrease of the concentration of colloidal Fe(OH)3. (2) The percentage of copper binding to colloidal Fe(OH)3 were between 50% and 70% in conditions of the same ionic strength of seawater, concentration of inorganic matter and pH. When the concentration of organic matter increased, the percentages of copper binding to colloidal Fe(OH)3 trended to decrease.