摘要
研究将酸改性的凹凸棒土与聚合氯化铝(PAC)复配制得PAC-AT吸附材料,对其进行了表征,并用于吸附去除水体中的磷。结果表明,PAC进入或覆盖在凹凸棒土结构内部或在表面发生复合反应。PAC-AT材料通过主要起吸附作用的AT与主要起电中和与起架桥网捕作用的铝离子协同作用来去除水体中的磷。PAC-AT对磷的最大吸附量为13.27 mg/g,符合准2级动力学方程,其最大理论平衡吸附量为12.33 mg/g。pH=4时,PAC-AT对磷的吸附量最大,当酸性增强或者碱性增强,PAC-AT对磷的吸附量均降低,强酸尤为显著。
The PAC-AT adsorption material was prepared by acid modified attapulgite (AT) and polyaluminum chloride (PAC). The material was characterized and used to adsorb phosphorus from aqueous solution. The results showed that PAC entered or covered the structure of AT and the composite reaction took place on the surface of AT structure. PAC-AT materials removed phosphorus from aqueous solution mainly by synergistic effect between the adsorption of AT and the charge neutralization, bridging and netting of aluminum ions. The maximum adsorption capacity of phosphorus by PAC-AT was 13.27 mg/g, the adsorption was fitted by pseudo second-order kinetic model and the maximum theoretical equilibrium adsorption capacity was 12.33 mg/g. The adsorption capacity of phosphorus by PAC-AT was the largest when pH was 4. When the acidity or alkalinity enhanced, the adsorption amount of phosphorus by PAC-AT decreased, especially the strong acid.
作者
王家宏
曹瑞华
郭茹
WANG Jiahong;CAO Ruihua;GUO Ru(School of environmental Science and Engineering,Shaanxi University of Science & Technology,Xi'an 710021,China)
出处
《水处理技术》
CAS
CSCD
北大核心
2019年第6期66-69,共4页
Technology of Water Treatment
基金
国家自然基金面上项目(21677092)
陕西省科技厅社发攻关项目(2013K12-01-07)
关键词
聚合氯化铝
凹凸棒土
复配改性
磷吸附
polyaluminium chloride
attapulgite
compound modification
phosphorus adsorption
