摘要
采用高岭土、除铁锰滤池反冲洗污泥、生物质、氧化钙等材料成功制备出铁锰污泥基生态陶粒,并探究了该陶粒的结构特征以及对水中磷的吸附性能。结果表明,铁锰污泥的添加量为30%,焙烧温度为900℃时所制备的陶粒综合性能最佳。当初始磷的质量浓度为3.0 mg·L^(-1),陶粒投加量为7.45 g·L^(-1),陶粒对磷酸盐的去除率达96.79%。吸附动力学结果表明,该陶粒对水中磷的去除过程符合准二级动力学;颗粒内扩散模型显示,磷酸盐的吸附速率同时受表面扩散和颗粒内扩散的影响;吸附等温实验表明Freundlich模型能更好地描述磷酸盐吸附过程。FTIR、XPS等表征发现铁锰污泥基陶粒,主要通过其表面羟基将水中磷有效去除。
The ecological ceramsite based on iron-manganese sludge was successfully prepared using the sludge from the filter for removing Fe and Mn,kaolin,biomass,and calcium oxide etc..Its structural characteristics and performance on phosphorus adsorption from water were investigated.The results show that the ceramsite prepared with a 30%addition of iron-manganese sludge at sintering temperature of 900℃ had the best performance.When the initial concentration was 3.0 mg·L^(-1) and the dosage of ceramsite was 7.45 g·L^(-1),the removal rate of phosphorus could reach 96.79%.The results of adsorption kinetics indicate that the removal process of phosphorus from water by the ceramsite fitted with the pseudo-second-order model;the simulation of the intra particle diffusion model shows that the adsorption rate of phosphorus was depended on both surface and intra particle diffusion;the adsorption isotherm experiments show that Freundlich model could better describe the adsorption process of phosphorus.FTIR,XPS and other characterizations suggest that the surface hydroxyl groups of the ceramsite based on iron-manganese sludge mainly contributed to effective phosphate adsorption from water.
作者
隗合新
赵光宇
汪健军
张瑞峰
祝彬荣
文刚
WEI Hexin;ZHAO Guangyu;WANG Jianjun;ZHANG Ruifeng;ZHU Binrong;WEN Gang(China Construction Sixth Engineering Bureau Co.Ltd.,Tianjin 300450,China;School of Urban Planning and Municipal Engineering,Xi'an Polytechnic University,Xi′an 710048,China;School of Environmental and Municipal Engineering,Xi′an University of Architecture and Technology,Xi′an 710055,China)
出处
《环境工程学报》
CAS
CSCD
北大核心
2024年第8期2219-2228,共10页
Chinese Journal of Environmental Engineering
基金
国家重点研发计划课题(2022YFC3203602)。
关键词
陶粒
磷
吸附
铁锰污泥
ceramsite
phosphorus
adsorption
iron-manganese sludge
