期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 593, 期 -, 页码 390-407出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2021.02.133
关键词
Sewage sludge; Coconut shell; Activation-hydrochar; Hydrothermal carbonization; Adsorption capacity
资金
- Sichuan Youth Science and technology innovation research team [2020JDTD0018]
- National Natural Science Foundation [41601341]
- National Science and Technology Major Project [2016ZX05040-03]
- Opening Foundation of the Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria [2018-05]
A novel activation-hydrochar with rich-pore structure was successfully prepared using a two-stage method, showing promising adsorption performance on Methylene Blue and Congo Red. The research highlighted the potential of utilizing waste materials for effective adsorption applications.
clearly indicated the synthesis route for activation-hydrochar, and its further adsorption performance, capacity, and mechanism on MB and CR. This research demonstrated that activation-hydrochar with the abundant surface area and rich-pore structure made it a candidate for the production of effective adsorption material. It is prospective to achieve the utilization of wastes and its further application in A two-stage method of hydrothermal carbonization and chemical activation technology was applied to prepare a novel, large surface area and rich-pore structure activation-hydrochar from sludge sewage and coconut shell due to its mild, low-cost, and well-developed merits. The pore-making mechanism of activation-hydrochar was discussed by FT-IR, XPS, SEM, TG, TG-MS, XRD, and BET characterization. These results illustrated that the first stage of hydrothermal carbonization achieved the rich-pore structure hydrochar via dehydration, decarboxylation, deamination, and rearrangement reactions. The subsequent KOH activation was conducive to the pore-forming process. Specifically, the pore structure of activation-hydrochar was ameliorated and abundant active adsorption sites were obtained by the modification. The adsorption properties of activation-hydrochar on Methylene Blue (MB) and Congo Red (CR) were systematically investigated, and the max adsorption capacities of those were obtained with 623.37 mg/g and 228.25 mg/g, respectively. The pseudo-second-order kinetics and Langmuir models were both fit to elucidate the adsorption process for both dyes. Thermodynamics revealed adsorption performance accompanied by the spontaneous and endothermic processes. In general, the research
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