Pollutant degradation and hydrogen production of landfill leachate membrane concentrates via aqueous phase reforming.

Autor: Yu Y; School of Environmental Science and Engineering, Tianjin University, Tianjin, 300072, China., Wang Y; School of Mechanical Engineering, Tianjin University of Commerce, Tianjin, 300134, China., Chen C; School of Biotechnology and Food Science, Tianjin University of Commerce, Tianjin, 300134, China., Bu Q; School of Environmental Science and Engineering, Tianjin University, Tianjin, 300072, China; China Energy Conservation (Beijing) Energy Conservation and Environment Protection Engineering Co., Ltd, Beijing, 100022, China., Tao J; School of Mechanical Engineering, Tianjin University of Commerce, Tianjin, 300134, China., Jia X; School of Environmental Science and Engineering, Tianjin University, Tianjin, 300072, China., Sun J; Postdoctoral Programme, Guosen Securities, Shenzhen, 518001, China., Yan B; School of Environmental Science and Engineering, Tianjin University, Tianjin, 300072, China. Electronic address: yanbeibei@tju.edu.cn., Chen G; School of Mechanical Engineering, Tianjin University of Commerce, Tianjin, 300134, China; School of Ecology and Environment, Tibet University, Lhasa, 850012, China.
Jazyk: angličtina
Zdroj: Chemosphere [Chemosphere] 2024 Sep; Vol. 364, pp. 143027. Date of Electronic Publication: 2024 Aug 11.
DOI: 10.1016/j.chemosphere.2024.143027
Abstrakt: Membrane filtration is a mainstream method for landfill leachate treatment, leaving the landfill leachate membrane concentrates (LLMCs) a high-toxicity residue. Conventional LLMCs disposal technology shows specific challenges due to the low biodegradability, high inorganic salts, and high heavy metal ions content of LLMCs. Therefore, it is necessary to degrade LLMCs with a more suitable technology. In this study, a special method was proposed to convert some organic chemicals into valuable compounds by aqueous phase reforming (APR). Ni-based catalysts (Ni//La 2 O 3 , Ni/CeO 2 , Ni/MgO, and Ni/Al 2 O 3 ) were prepared to investigate the effect of different supports on the APR of LLMCs. APR performed outstanding characteristics in the decrease of chemical oxygen demand (COD) and total organic carbon (TOC), the degradation of macromolecules, and the removal of heavy metal ions in the aqueous phase. In addition, H 2 was generated which is beneficial for energy compensating during the APR process. The best-performing catalyst (Ni/Al 2 O 3 ) was selected to investigate the effects of reaction temperature, reaction time, and catalyst addition on product distribution. The optimal H 2 selectivity (44.71%) and H 2 production (11.63 mmol/g COD) were obtained at 250 °C with 2 g Ni/Al 2 O 3 usage for 1 h. This paper provided a new perspective on the disposal of LLMCs, which will degrade pollutants efficiently.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024. Published by Elsevier Ltd.)
Databáze: MEDLINE
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