农业工程学报2012，Vol.28Issue(7)：117-123,7.DOI:10.3969/j.issn.1002-6819.2012.07.020
保水剂在不同铵盐溶液体系中的吸水和吸附铵离子特征
Water and ammonium adsorption characteristics of water retaining agent in different solutions of ammonium salt
摘要
Abstract
In order to investigate the interaction between water retaining agents (WRAs) and NH4+, polyacrylate (PAA) and poly acrylate-co-acrylamide (P(AA-AM)) were selected as the tested WRAs to study the characteristics of water and NH4+ adsorption in a series of solutions of NH4+C1, NH/Cl-KCl and NH4+Cl-CaCl2 respectively. The results showed that NH4+ could obviously reduce the water absorbency of the WARs. The water absorbency was markedly decreased with the NH4+ concentration increase. The relationship between relative water absorbency and NH4+ concentration could be described by the minus power function. For NH4+, K+, Ca2+ individual solution and NH4+-K+, NH4+-Ca2+ coexistent solution, the influence of WRAs on water absorbency followed the order NH4+-K+< NH4+> K+<NH4+-Ca2+<Ca2. In despite of the sharply decrease of water absorbency with the rising of NH4+ concentration, WRAs could largely adsorb NFLt+ and water. The adsorption capacity of NH4+ increased with rising of NFL}+ concentration. This adsorption could be well described by Freundlich and linear model. In different solutions with the same NH4+ concentration, the adsorption capacities of NH4+ were different. NH4+-K+ and NH4+-Ca2+ coexistent solutions were helpful to NH4+ adsorption. In NH4+, K+, Ca2+ individual solution and NH4+-K+, NH4+-Ca2+ coexistent solutions, the adsorption capacity of NH4+ followed the trend of NH4+<NH4+-Ca2+<NH4+-K+. Comparatively, P(AA-AM) was more tolerant to NFLt"1" and had stronger adsorption capability for NH4+ than P(AA).关键词
吸附/铵化合物/试验/保水剂/共存阳离子Key words
absorption/ammonium compound/experiments water retaining agent/coexisting cation分类
农业科技引用本文复制引用
王新爱,李永胜,杜建军,粟晓万,黄帮裕..保水剂在不同铵盐溶液体系中的吸水和吸附铵离子特征[J].农业工程学报,2012,28(7):117-123,7.基金项目
国家自然科学基金(30971867、31172031) （30971867、31172031）
广东省自然科学基金重点项目(10251022501000000) （10251022501000000）
广东省科技计划项目(2008B021000043) （2008B021000043）
教育部留学回国人员科研启动基金项目(教外司留[2009]1341号) （教外司留[2009]1341号）
