摘要
为解决北方地区高氟地下水污染问题,采用微米氧化锆/沸石分子筛作为吸附剂,考察了吸附时间、pH值、吸附温度对微米氧化锆/沸石分子筛吸附F^-的影响,并对吸附动力学、吸附等温线、吸附热力学等进行了研究。结果表明:微米氧化锆/沸石分子筛在吸附时间为8 h、pH值为5~7、温度为10~25℃条件下对地下水中F^-有较好的去除效果;Lagergren准二级动力学模型可以更好地描述微米氧化锆/沸石分子筛吸附F^-的动力学行为(R^2=0.9999);Freundlich吸附等温线模型可以更准确地描述F^-吸附特性,即多层吸附;吸附热力学表明微米氧化锆/沸石分子筛对水中F^-的吸附是一种自发进行的吸热反应,温度升高有利于吸附反应的进行。
To solve the problem of high fluoride pollution in groundwater in northern China,micron zirconia/zeolite molecular sieve was used as adsorbent. The influence of adsorption time,pH,and adsorption temperature on the adsorption efficiency were investigated,and the adsorption kinetics,isotherms, and thermodynamics were studied. The results showed that the micron zirconia/zeolite molecular sieve had good removal efficiency on F^- in groundwater under the adsorption time of 8 h,pH value of 5-7 and temperature of 10-25 ℃ . The reaction of micro-zirconia/zeolite molecular sieve to remove F^- conformed to the Lagergren quasi-secondary kinetic model (R^2= 0. 999 9). Freundlich adsorption isotherm model could accurately describe F^- adsorption characteristics,which was a multilayer adsorption. The adsorption thermodynamics results showed that the process of F^- adsorption by micron zirconia/zeolite molecular sieve was a spontaneous endothermic reaction,and temperature rise was favorable to the adsorption reaction.
作者
郜玉楠
茹雅芳
王静
刘佳琦
GAO Yu-nan;RU Ya-fang;WANG Jing;LIU Jia-qi(School of Municipal and Environmental Engineering,Shenyang Jianzhu University,Shenyang 110168,China)
出处
《中国给水排水》
CAS
CSCD
北大核心
2020年第3期49-53,共5页
China Water & Wastewater
基金
国家自然科学基金资助项目(51508342)
辽宁省自然科学基金资助项目(201602607)
沈阳建筑大学科研创新培育计划项目(CXPY2017008)。
关键词
高氟地下水
微米氧化锆
沸石分子筛
high fluoride groundwater
micron zirconia
zeolite molecular sieve
