文献类型：期刊文献

中文题名：改性沸石/聚合氯化铝造粒复合材料对水中氨氮和磷的吸附性能研究

英文题名：Adsorption Performance for Ammonia Nitrogen and Phosphorus in Water by Modified Zeolite/Polyaluminium Chloride Composite Granular

作者：陈元天[1,2];曾贵禄[1,2];李德晓[1,2];张龙斌[1,2];高剑雄[1,2];吕树光[1,2]

机构：[1]华东理工大学资源与环境工程学院;[2]国家环境保护化工过程环境风险评价与控制重点实验室,上海200237

年份：2024

卷号：50

期号：4

起止页码：32

中文期刊名：水处理技术

外文期刊名：Technology of Water Treatment

收录：CSTPCD;;北大核心:【北大核心2023】；CSCD:【CSCD_E2023_2024】；

基金：国家自然科学基金(41977164)。

语种：中文

中文关键词：改性沸石;聚合氯化铝;脱氮除磷;吸附;造粒

外文关键词：modified zeolite;polyaluminum chloride;nitrogen and phosphorus removal;adsorption;granulation

摘要：以改性沸石(MZ)和聚合氯化铝(PAC)为原料,添加粘结剂聚乙烯醇(PVA)和造孔剂碳酸氢钠(NaHCO_(3)),制备出可同步脱氮除磷的复合颗粒材料(MZP),并探究了投加量和pH等因素对氨氮和磷吸附性能的影响。结果表明,在MZP投加量为7 g/L,pH为6~8条件下,MZP对氨氮和磷的去除率均高于84%。MZP对氨氮和磷的吸附符合Freundlich吸附等温线模型,且吸附过程受液膜扩散和颗粒内扩散共同控制,符合准二级动力学模型,吸附过程MZP对氨氮和磷的最大理论吸附量分别为5.92、2.25 mg/g。共存离子对MZP吸附氨氮和磷有一定影响。经过5次吸附-解吸再生循环利用后,MZP仍能保持74%的氨氮去除率和52.6%的磷去除率。结合材料表征分析结果,MZP对氨氮的吸附主要为离子交换,对磷的吸附主要为静电吸附和配体交换。
Composite granular material(MZP)was prepared using modified zeolite(MZ)and polyaluminum chloride(PAC)as raw materials with the addition of adhesive polyvinyl alcohol(PVA)and pore-forming agent sodium bicarbonate(NaHCO_(3)),and used to remove nitrogen and phosphorus from water synchronously.The effects of MZP dosage and solution pH on adsorption performance of ammonia nitrogen and phosphorus were investigated.The results showed that when the dosage of MZP was 7 g/L and pH was in the range of 6 to 8,the removals of both ammonia nitrogen and phosphorus by MZP were higher than 84%.The adsorption of ammonia nitrogen and phosphorus by MZP conformed to the Freundlich adsorption isotherm model,and the adsorption process was controlled by liquid film diffusion and intra-particle diffusion,which well fitted to the pseudo-secondorder kinetic model.The maximum theoretical adsorption capacities of MZP for ammonia nitrogen and phosphorus were 5.92 and 2.25 mg/g,respectively.Coexisting ions had certain effect on adsorption of ammonia nitrogen and phosphorus by MZP.After five times of adsorption-desorption regeneration,the removals of ammonia nitrogen and phosphorus by MZP still remained at 74%and 52.6%,respectively.Combined with the material characterization results,the adsorption mechanism of ammonia nitrogen by MZP was mainly by ion exchange,and the adsorption of phosphorus was mainly caused by electrostatic adsorption and ligand exchange.