弱酸性阳离子交换纤维及其对水中微量铁(Ⅲ)离子的富集  

Preparation of weakly acidic cation-exchange fibers and its adsorption of iron(Ⅲ)

作　　者：郑建[1,2] 魏俊富[1,2] 赵孔银[1,2] 袁峰[1,2] 李海静[1,2] 

机构地区：[1]天津工业大学改性与功能纤维天津市重点实验室,天津300160 [2]天津工业大学材料科学与化学工程学院,天津300160

出　　处：《天津工业大学学报》2009年第2期5-9,共5页Journal of Tiangong University

基　　金：国家重点基础研究发展计划前期研究专项(2008CB417202);教育部高校博士点基金资助项目(20050058001);天津市科技发展计划项目(06TXTJJC14400);天津市高等学校科技发展基金资助项目(2006ZD40)

摘　　要：以聚丙烯无纺布为基体,通过γ射线共辐射接枝丙烯酸制备了弱酸性阳离子交换纤维(PP-g-AA),以该纤维作为固相萃取吸附剂,富集水中的微量铁(Ⅲ)离子.结果表明,PP-g-AA纤维对水中微量铁(Ⅲ)离子具有良好的吸附富集性能.在pH值为4.9、质量浓度为5 mg/L的Fe3+水溶液中静态吸附20 min后纤维的吸附率就达到93.3%,吸附量为2.80 mg/g,吸附活化能为79.78 kJ/mol;吸附Fe3+后的PP-g-AA纤维用1 mol/L的盐酸洗脱5 min后,洗脱率达到96.4%,洗脱液中Fe3+浓度为140 mg/L,是富集前的28倍.Weakly acidic cation exchange fiber （PP-g-AA） is prepared by co-irradiation grafting of acrylic acid onto PP noworen fabric via ^60Co-γ, radiation source. Then PP-g-AA fiber is applied to the adsorption of trace iron（Ⅲ） in water samples as solid phase extraction adsorbent. The results indicate that PP-g-AA fiber exhibites a good absorption property of iron （Ⅲ）. Under the optimum adsorption pH value 4.9, the static adsorption capacity of iron from the 5 mg/L iron （Ⅲ） solution is 2.80 mg/g in 20 minutes, the recovery is 93.3%, and activation energy of adsorption is 79.78 kJ/mol. Iron remained on the fiber is then eluted with 1 mol/L HCl for 5 min, The elution ratio is 96.4% and the concentration of iron in eluent is 140 mg/L, which is 28 times of the original sample solution.

关 键 词：聚丙烯 弱酸性阳离子交换纤维 辐射接枝 铁离子 富集 

分 类 号：TS102.528.2[轻工技术与工程—纺织工程] TS102.61[轻工技术与工程—纺织科学与工程]