Study on the adsorption effects of lead from black liquor source fulvic acids
Paper black liquor accounts for over 90%of the pollution in the entire paper industry,which would seriously pollute environment.A large amount of organic matter in papermaking black liquor can serve as a precursor for the synthesis of fulvic acid.Many studies have shown that fulvic acid has a good adsorption effect on heavy metals.According to the method recommended by the International Humic Acid Association,the alkaline fulvic-like acid(JFLA)and ammonium fulvic-like acid(AFLA)were successfully extracted from the black liquor of two different papermaking processes.Through equilibrium complexation experiments,the adsorption effects of two types of fulvic-like acids on lead were studied in heavy metal aqueous solutions with different Pb concentrations and pH.Research has shown that AFLA has better adsorption capacity under low Pb concentration and high pH conditions,and AFLA has stronger adsorption capacity than JFLA.The results of this study indicate the possibility of black liquor fulvic-like acid to repair the Pb polluted water.
paper black liquorfulvic-like acidacidic groupleadheavy metal contamination
NETL
NSTL
万方数据
维普
