遗传算法模拟计算Pb~(2+)-FA-SO_4~(2-)体系的化学形态分布

研究了水体中重要污染元素铅在富里酸（FA）、SO42-共同存在时的化学形态分布，根据物料平衡和化学平衡建立了Pb2+-FA-SO42-的化学模型，用Pb2+滴定络合剂FA和SO42-的混合溶液，使用ASV测定阳极溶出电流并采用遗传算法（GA）对铅的化学形态进行了模拟计算，用成对t检验的结果表明，阳极溶出电流的计算值和实测值之间并无显著性差异．

Simulation Calculation for Chemical Speciation of Pb~(2+)-FA-SO_4~(2-) System by Genetic Algorithms

Fulvic acid (FA) has the marked effect on the chemical speciations of metal ionsexisted in water system and further affects their biological action as well as their remove andtransformation in ecosystem. In this paper, the chemical speciation of lead, an importantharmful and pollution element, in the aqueous solution containing FA and SO has been Cal-culated. The anode stripping current, i, can be measured using Ph2+ to titrate the aqueoussolution containing FA and SO by ASV. According to the chemical model of Pb2+-FA-SO constructed basing on material and chemical balance, the simulation calculation for thechemical speciations of lead have been made using a novel method of global optimization-ge-genetic algorithm (GA). The results of t test indicate that there is no significant differencebetween calculated and experimental values of anode stripping current.