期刊
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
卷 642, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.colsurfa.2022.128621
关键词
Lignin; Chitosan crosslinked composite; Methylene blue; Adsorption mechanism
资金
- Foundation for Young Talents in Forestry and Grassland Science and Technology Innovation [2019132610]
- Fundamental Research Funds for the Central Universities [2021ZY24]
- State Key Laboratory of Bio-Fibers and Eco-Textiles (Qingdao University) [K2019-04]
The study found that the prepared CS-BC showed excellent performance in removing methylene blue, with an increased adsorption capacity by about 2 times and good recycling performance, providing a potential solution for treating industrial wastewater.
Methylene blue (MB) in industrial wastewater is a potential threat to human health and environment and the removal of methylene blue attracts wide attention. In this study, corncob lignin was carbonized at 400 degrees C and cross-linked with chitosan in the presence of epichlorohydrin to prepare a composite (CS-BC), and the adsorption behavior was discussed by using MB as adsorbate. Its removal of methylene blue reached 99.96% with a maximum adsorption capacity of 499.8 mg/g, and the adsorption behavior was in accordance with the Langmuir model. The fitness of pseudo-second-order kinetic model conceded that chemisorption played a major role. Compared with unmodified biochar, the adsorption capacity of CS-BC was increased by similar to 2 times. CS-BC had good recyclability and was easy to separate from water, which maintained excellent absorption performance after 5 cycles. The excellent adsorption capacity and recycling performance of CS-BC provide a prospect way to eliminate methylene blue from industrial effluents.
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