摘要
考察了溶液pH值对聚丙烯酸（盐）／丙烯酰胺高吸水树脂（PAAAM树脂）吸液性能和吸附Cu^2＋和Fe^3＋的影响．结果表明：（1）在蒸馏水中，当pH值从2增加到4时，PAAAM树脂的吸液倍率迅速增加；当pH值在4～10时，吸液倍率基本不变；在pH≥10时，吸液倍率迅速减小．在NaCl、Na2SO4和Na3PO4溶液中，当pH值从2增加到3时，三种电解质溶液中的吸液倍率相同；在pH值为3到12时，吸液倍率逐渐增加，且按盐溶液顺序QNaCl〈QNa3PO4〈QNa2SO4变化；当pH=12时，各电解质溶液中吸液倍率均达最大；当pH再增加时，吸液倍率逐渐减小．（2）当溶液pH值在2．31至4．15之间时．PAAAM树脂对Cu^2＋的吸附量随pH的增加而增大；溶液pH为1．0至2．07时，PAAAM树脂对Fe^3＋的吸附量随pH的增大而增大．
The effects of solution pH on the absorbency and adsorption of PAAAM were investigated. In distilled water, the absorbency of PAAAM increases with increasing pH when pH =2 - 4, almost keeps constant in pH range of 4 - 10 and decreases with increasing pH when pH 〉 10 ; while in electrolyte solutions, the absorbency increases with an increase of the solution pH until pH = 12. The absorbency tendency at the same pH follows ： QNaCl 〈 QNa3PO4 〈 QNa2SO4 in the solution pH range of 3 - 12 and the absorbency decreased with pH when pH 〉 12. The results show that the adsorption capacity of Cu^2＋ onto PAAAM increased remarkably with an increase of pH value which was between 2.31 and 4.15 ; However, for the adsorption of Fe^3＋ , pH was between 1.0 and 2.07.
出处
《湘潭大学自然科学学报》
CAS
CSCD
北大核心
2007年第4期63-66,85,共5页
Natural Science Journal of Xiangtan University
基金
湖南省自然科学基金资助项目(07JJ3109)
中南林业科技大学人才启动基金资助项目
