[1]刁寒,艾恒雨,张桂玲,等.铝基质硅藻土污泥的制备及其吸附除磷效能[J].中国给水排水,2020,36(19):83-88.
DIAO Han,AI Heng-yu,ZHANG Gui-ling,et al.Preparation of Aluminum Matrix Diatomite Sludge and Its Adsorption and Removal Efficiency of Phosphorus[J].China Water & Wastewater,2020,36(19):83-88.
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DIAO Han,AI Heng-yu,ZHANG Gui-ling,et al.Preparation of Aluminum Matrix Diatomite Sludge and Its Adsorption and Removal Efficiency of Phosphorus[J].China Water & Wastewater,2020,36(19):83-88.
铝基质硅藻土污泥的制备及其吸附除磷效能
中国给水排水[ISSN:1000-4062/CN:12-1073/TU]
卷:
第36卷
期数:
2020年第19期
页码:
83-88
栏目:
出版日期:
2020-10-01
- Title:
- Preparation of Aluminum Matrix Diatomite Sludge and Its Adsorption and Removal Efficiency of Phosphorus
- Keywords:
- aluminum matrix diatomite sludge; phosphorous adsorption and removal; pH value; adsorption mechanism
- 摘要:
- 通过向含硅藻土的水样中投加聚合氯化铝和氢氧化钠，得到铝基质硅藻土污泥（ADS），考察了ADS对水体中磷的吸附性能及吸附机理。结果表明，ADS的比表面积和平均孔径分别为78.092 m2/g和5.065 nm，比表面积较硅藻土增加了13.5倍，为吸附反应提供了大量位点，表现出介孔材料的特性；pH值对吸附效率的影响较大，pH值为中性时吸附效果较好，pH值=6和pH值=8条件下的除磷率分别达到了83.0%和80.9%；ADS对磷的吸附原理主要是化学沉积反应和静电吸附，且化学吸附起主导作用，符合准二级反应动力学模型；ADS吸附除磷过程以单分子层吸附为主，吸附位点分布均匀，符合Langmuir吸附等温模型；ADS对磷的最大吸附量为15.54 mg/g，其最大理论平衡吸附量为15.97 mg/g。
- Abstract:
- Aluminum matrix diatomite sludge (ADS) was prepared by adding polyaluminum chloride and sodium hydroxide into diatomite water sample, and the adsorption efficiency and adsorption mechanism of phosphorus in water by ADS was explored. Specific surface area and average pore diameter of ADS were 78.092 m2/g and 5.065 nm, respectively. The specific surface area of ADS was 13.5 times higher to that of diatomite, which provided a large number of sites for adsorption reaction and exhibited the characteristics of mesoporous materials. pH value had a great influence on adsorption efficiency. The adsorption efficiency was better when pH value was neutral. When pH was 6 and 8, removal efficiencies of phosphorus reached 83.0% and 80.9%, respectively. Adsorption mechanism of phosphorus by ADS was mainly chemical deposition reaction and electrostatic adsorption, and chemical adsorption played a leading role, which conformed to the quasi-secondary reaction kinetics model. The phosphorous adsorption and removal process of ADS was mainly monolayer adsorption, and the adsorption sites were evenly distributed, which was consistent with the Langmuir isotherm adsorption model. The maximum adsorption capacity of phosphorus by ADS was 15.54 mg/g, and the maximum theoretical equilibrium adsorption capacity was 15.97 mg/g.
更新日期/Last Update:
2020-10-01