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dc.contributor.authorHuang Jia-Huazh_CN
dc.contributor.authorGong Zhen-Binzh_CN
dc.contributor.authorLin Ji-Junzh_CN
dc.contributor.authorDuan Hua-Lingzh_CN
dc.contributor.author弓振斌zh_CN
dc.date.accessioned2015-07-22T03:12:07Z
dc.date.available2015-07-22T03:12:07Z
dc.date.issued2012-12-10zh_CN
dc.identifier.citationCHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE, 2012,33(12):2633-2637zh_CN
dc.identifier.otherWOS:000313544300007zh_CN
dc.identifier.urihttps://dspace.xmu.edu.cn/handle/2288/87848
dc.description.abstractA rapid and accurate method using polymer complexation ultra-filtration (PC-UF) technique and inductively coupled plasma mass spectrometry(ICP-MS) for the measurement of the complexation stability constant and the average coordination number of poly (ethylenimine) (PET) groups participating in the complex formation of PEI with metal ions was proposed. The method was applied to determine the stability constant and the average coordination number of PEI and Cd2+ complex. Firstly the mixture of various initial concentration ratios of PEI and Cd2+ solution were prepared, respectively, then the mixture reacted until the complexation equilibrium reached, and at last Cd2+ and small components were permeated into the solution and PEI-Cd complex was hold back with centrifugal ultra-filtration kit. Then ultra-filtration followed was completed so as to decompose PEI-Cd complex and obtain Cd2+ species using 10 mL 3% (volume fraction) HNO3. With the help of chemical model inferred in the study, the complexation stability constant and the average coordinating number of PEI-Cd could. be calculated. Effect of pH value(pH = 4. 0-5. 9) on the equilibrium was investigated. The results showed that the complexation stability constant and the average coordinating number of PEI-Cd became larger as pH value increases. This may due to the protonation of PEI reduces as pH values increase, then the binding ability of PEI with metals become stronger.zh_CN
dc.language.isoen_USzh_CN
dc.publisherCHEM J CHINESE Uzh_CN
dc.source.urihttp://dx.doi.org/10.7503/cjcu20120405zh_CN
dc.subjectWATER-SOLUBLE POLYMERSzh_CN
dc.subjectWEIGHT POLY(ACRYLIC ACIDS)zh_CN
dc.subjectBINDING CONSTANTSzh_CN
dc.subjectAQUEOUS-SOLUTIONSzh_CN
dc.subjectPOLYACRYLIC-ACIDzh_CN
dc.subjectULTRAFILTRATIONzh_CN
dc.subjectIONSzh_CN
dc.subjectREMOVALzh_CN
dc.subjectNI(II)zh_CN
dc.subjectSEPARATIONzh_CN
dc.titleMeasurement of Complexation Stability Constant and Coordinating Number of Poly(ethylenimine) with Metalszh_CN
dc.typeArticlezh_CN


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