Phosphorus removal from wastewater using a lanthanum oxide-loaded ceramic adsorbent
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- 作者：Yan Zuo ; Xiaona Fu ; Ying Chen ; Guirong Cui ; Min Liu
- 关键词：Adsorption ; Phosphorus wastewater ; Removal efficiency ; Lanthanum oxide ; loaded ceramic
- 刊名：Adsorption
- 出版年：2016
- 出版时间：November 2016
- 年：2016
- 卷：22
- 期：8
- 页码：1091-1098
- 全文大小：988 KB
- 刊物类别：Chemistry and Materials Science
- 刊物主题：Chemistry
Surfaces and Interfaces and Thin Films
Industrial Chemistry and Chemical Engineering
Engineering Thermodynamics and Transport Phenomena - 出版者：Springer Netherlands
- ISSN：1572-8757
- 卷排序：22
文摘
Phosphorus removal is significant to prevent the eutrophication of water bodies. Adsorption is a promising method with many attractive advantages. An adsorbent is essential to the adsorption method. To investigate the absorption efficiency of lanthanum oxide-loaded ceramic granules, this study loaded lanthanum oxide onto ceramic granules in two different approaches and obtained two adsorbents called G1 and G2. The effects of the initial concentration of phosphorus, pH, temperature, and interfering anions on the phosphorus adsorption of G1 and G2 were investigated in laboratory experiments. When pH ranged from 3.0 to 8.0, the two adsorbents achieved the optimum phosphorus removal efficiency. At pH 4.0, the removal efficiencies of G1 and G2 were 98.1 and 99.8 %, respectively. Temperature fluctuation had an insignificant effect on removal efficiency. The effect of the presence of interfering anions on the adsorption efficiency was limited, i.e., <10 %. Comprehensive comparison showed that G1 exhibited better performance than G2. The Brunauer–Emmett–Teller specific surface area and total pore volume expanded after modification by 40 and ×6, respectively. The X-ray fluorescence results showed a 42 % (percentage by mass) lanthanum content in the modified adsorbents, some of which existed in the endoporus, whereas others were loaded onto the surface of the ceramic granules. The results of the Fourier Transform infrared spectrometry noted combinations between ceramic granulars and lanthanum oxide, and G1 adsorbed PO43− from an aqueous solution.