摘要
通过室内水溶液试验研究了不同尿不湿中高吸水性物质(Super absorbent polymer)(SAP)对重金属离子的最大吸附容量、吸附稳定性和选择性。结果表明,废弃的国外品牌DODOT(DD)对重金属离子的最大吸附容量最高,显著高于其他尿不湿,国产好奇牌(HQ)与帮宝适牌(BB)差异不明显,但显著高于妈咪宝贝牌(MM)。通过比较不同重金属离子的最大吸附率和解吸率,供试的4种尿不湿中SAP对4种重金属离子的最大吸附率的趋势为Pb2+>Cd2+>Cu2+≈Zn2+,解吸率则呈现Pb2+<Cd2+<Cu2+≈Zn2+,除Cu2+≈Zn2+差异不显著外,其他差异均十分显著,因此Pb2+和Cd2+更加容易被SAP所吸附,这种差异可能是由于不同离子不同的水化半径所导致的。综合以上结果和国情,好奇和帮宝适牌尿不湿更加适合应用在我国土壤重金属污染修复上。
The adsorption capacity,stability and selection of heavy metal( HM) ions( Cu2 +,Zn2 +,Cd2 +,Pb2 +) of super absorbent polymer( SAP) from different used diapers were studied in the aquatic experiment. The results showed that the absorption capacity of SAP from used DODOT( DD) brand diaper was obviously higher than others. Among domestic brands,the absorption capacity from used Haoqi( HQ) brand and Bangbaoshi( BB)brand was similar but significantly greater than that of used Mami Baobei( MM) brand. The maximum adsorption rate for heavy metal ions of the SAP's from the four kinds diapers were successively Pb2 +,Cd2 +,Cu2 +( ≈Zn2 +). The desorption rate of them showed opposite results and is remarkably different except for Cu2 +and Zn2 +. Ion radius probably is the reason for difference of the absorption results. Conclusively,the HQ and BB diapers may be more suitable to used in renovating contaminated soil with heavy metals.
出处
《辽东学院学报（自然科学版）》
CAS
2015年第4期260-266,共7页
Journal of Eastern Liaoning University:Natural Science Edition
基金
教育部第46批留学人员科研启动基金项目
关键词
废弃尿不湿
高吸水性物质
重金属
吸附容量
吸附强度
选择性
used diaper
super absorbent polymer
heavy metal
absorption capacity
absorption strength
selection
