摘要
研究了胱氨酸的浓度对黄河水中铅(Ⅱ)与表层沉积物相互作用的离子交换率―pH关系曲线的影响。主要结果有:(1)加入胱氨酸离子交换率降低。具体变化为:当胱氨酸浓度从0增加到0.48祄ol稬-1时,离子交换率从74.5%降至52%,再加胱氨酸(祄ol稬-1)到20.48→30.48,抑制作用减小,继续加入胱氨酸(祄ol稬-1)至30.48→4?.48→5?.48→10?.48,抑制作用增大。(2)高浓度的胱氨酸对离子交换率―pH曲线的影响出现了“S型曲线变为峰型”的现象。(3)交换剂为转化沙时的离子交换率比未转化沙大。
The effect of Cystine on the curves of ion exchange ratio E%-pH in the interaction between Pb(II) and the surface layer sediment in the Yellow River was studied.The major results are: (1) The ion exchange ratio decreases as the Cystion concentration rises. The details of the changes are that the ion exchange ratio decreases from 74.5% to 52% as the Cystine concentration (祄ol稬-1) rises from 0 to 0.48, the inhibitory effect decreases when the concentration is between 2?.48 and 3?.48 祄ol稬-1, and the inhibitory effect increases when the concentration of Cystine continues to be increased range in the 3?.48, 4?.48, 5?.48 and 10?.48 祄ol稬-1; (2) The phenomenon has emerged, that an S shapeol curve will become a peak shaped one with high concentrations of Cystine on E% pH curves; (3) When the exchange reagent is the transformed sand the ion exchange ratio of lead is bigger than that for the non-transfromed sand.
出处
《海洋湖沼通报》
CSCD
2001年第4期1-5,共5页
Transactions of Oceanology and Limnology
基金
国家自然科学基金资助项目(29361001)。
