Advanced treatment of stabilized landfill leachate after biochemical process with hydrocalumite chloride (Ca/Al–Cl LDH)

• DOI: 10.1016/j.biortech.2016.01.035
• Publication Date: 2016-01-22T15:55:50Z
• Authors: Hua Chen; Ying Sun; Xiuxiu Ruan; Ying Yu; Minying Zhu; Jia Zhang; Jizhi Zhou; Yunfeng Xu; Jianyong Liu; Guangren Qian
• Keywords: Biological Oxygen Demand Analysis; Minerals; Biochemical Phenomena; 0211 other engineering and technologies; 02 engineering and technology; Carbon; 6. Clean water; Water Purification; 12. Responsible consumption; Spectrometry, Fluorescence; Chlorides; Hydroxides; Humic Substances; Water Pollutants, Chemical

This study investigated the effectiveness of Ca/Al-Cl LDH for the treatment of stabilized landfill leachate. Experiments were performed including different dosage of Ca/Al-Cl LDH and comparison with different reagents, such as CaCl2 and AlCl3. As a result, Ca/Al-Cl LDH efficiently removed organic matters in stabilized landfill leachate with the maximum removal (59.41% COD, 62.06% DOC and 70.56% UV254) at the dose of 30g/L. According to UV254 and EEM, it is remarkable that the formation of Ca/Al-LDH has a greater beneficial to organic removal than other reagents, especially for fulvic acid-like and humic acid-like compounds. Moreover, the removal of fulvic acid-like compounds was much better than humic acid-like compounds. The previous compounds had more carboxylic groups, thus had a better removal selectivity.