【摘要】 利用Tessier和杨崇洁分别提出的形态分析法,分析吸附在泥煤中镍的赋存形态,及其随pH值的变化规律.利用Tessier五步形态分析法分析,泥煤中的镍主要以可交换态存在,说明泥煤对镍的吸附以离子交换为主其它形式为辅.利用杨崇洁等人提出的形态分析法分析,泥煤中的镍主要以可交换态和可给态存在,说明泥煤对镍的吸附可能以离子交换和络合形式存在.分析结果表明:吸附机理随pH值而变化.更多还原

【Abstract】 The distributions of nickel adsorbed on peat and the effect of pH were studied using sequential extraction procedures proposed by Tessier and Yang Chongjie respectively.It’s indicated by Tessier’s sequential extraction procedure method that the nickel adsorbed on peat exits as exchangeable speciation mostly,which means that the peat adsorbs nickel mainly by ion exchange.And it’s indicated by Yang Chongjie’s sequential extraction procedure that the nickel adsorbed on peat exits as exchangeable and presentable speciation mostly,which means that the nickel and peat are combined with ion exchange and complexation.Analysis shows that the adsorption mechanism changes with the variance of pH value.更多还原