Inorganic Chemicals Industry >
Study on preparation of sludge biochar/attapulgite and its adsorption properties
Received date: 2022-07-16
Online published: 2023-05-15
Sludge biochar/attapulgite（SBC/ATP） was prepared by slow co-pyrolysis of attapulgite（ATP） and sewage sludge（SS），and the adsorption performance of methylene blue（MB） was studied.The micromorphology and physicochemical properties of sludge biochar and its composites were analyzed by scanning electron microscopy，X-ray diffraction spectroscopy，infrared spectroscopy，X-ray photoelectron spectroscopy.The effects of pyrolysis temperature and raw material ratio on the adsorption properties of sludge biochar/attapulgite were investigated，and the effects of adsorbent dosage，pH，initial concentration and adsorption time on MB removal rate were investigated.The experimental results showed that the maximum adsorption capacity of SBC/ATP（50%） prepared at 500 ℃ was 53.74 mg/g when the dosage was 1.2 g/L，pH was 11，the initial concentration of MB solution was 100 mg/L，and the adsorption time was 180 min.The adsorption of MB by SBC/ATP（50%） was more in line with Langmuir isotherm model and quasi second-order kinetic model，indicating that the adsorption process was mainly monolayer adsorption controlled by chemical adsorption.
Key words： attapulgite; sludge biochar; compound material; methylene blue; adsorbent
GAO Fei , DONG Liangfei , GE Yulong , TANG Yuanyuan , LI Fen . Study on preparation of sludge biochar/attapulgite and its adsorption properties[J]. Inorganic Chemicals Industry, 2023 , 55(5) : 91 -99 . DOI: 10.19964/j.issn.1006-4990.2022-0435
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