铝污泥对磷的吸附动力学机制及其影响因素  

Kinetics Mechanism and Influencing Factors of Phosphorus Adsorption by Aluminum Sludge

作　　者：巨龙[1,2] 耿雅妮[1,2] 任雪盈 董洁 张军[1,3] JU Long GENG Ya-ni REN Xue-ying DONG Jie ZHANG Jun(Shaanxi Key Laboratory of Disasters Monitoring and Mechanism Simulation, Baoji 721013, China College of Geography and Environment, Baoji University of Arts and Sciences, Baoji 721013, China Key Laboratory of Subsurface Hydrology and Ecological Effect in Arid Region, Ministry of Education, Chang＇ an University, Xi＇ an 710064, China)

机构地区：[1]陕西省灾害监测与机理模拟重点实验室,陕西宝鸡721013 [2]宝鸡文理学院地理与环境学院,陕西宝鸡721013 [3]长安大学旱区地下水文与生态效应教育部重点实验室,陕西西安710064

出　　处：《江西农业学报》2017年第11期87-90,共4页Acta Agriculturae Jiangxi

基　　金：教育部旱区地下水文及生态效应重点实验室开放基金(310829151140);宝鸡文理学院校级重点项目(ZK2017007);自然地理学陕西省重点学科资助

摘　　要：通过对铝污泥对磷的吸附动力学特征、吸附等温特征及影响吸附的主要因素的研究,得出铝污泥对水中磷的吸附特征符合Langmuir和Freundlich方程,其中Langmuir方程拟合效果较佳,最大饱和吸附量为1.3194 mg/g;吸附动力学表明:准2级动力学拟合效果较好(R2>0.98)。在4种影响因素中,铝污泥粒径影响最大,在粒径<0.15 mm、温度为30℃、p H为7、转速120 r/min时,吸附量最大,为1.28270 g/L。影响铝污泥吸附磷的因素由大到小依次为:铝污泥粒径、转速、溶液pH、温度。The kinetics characteristics,isothermality and main influencing factors of phosphorus adsorption by aluminum sludge were studied. It was obtained that： the adsorption of aluminum sludge to phosphorus in water accorded with Langmuir equation and Freundlich equation; Langmuir equation had better simulative effects,and the maximum saturated adsorption capacity was 1.3194 mg/g. The result of adsorption kinetics indicated that the granted second-order kinetics had a better simulative effect（ R^2 〉0.98）. Among 4 factors,the particle size of aluminum sludge had the greatest influence on the phosphorus adsorption,followed by the rotate speed,p H-value of solution,and temperature in order. When the particle size of aluminum sludge was less than 0.15 mm,the temperature was 30 ℃,the pH-value of solution was 7,and the rotate speed was 120 r/min,the phosphorus adsorption capacity was the highest,being 1.28270 g/L.

关 键 词：铝污泥 磷 吸附动力学 机制 影响因素 

分 类 号：X705[环境科学与工程—环境工程]