Modified biochar prepared from Retinervus luffae fructus for dyes adsorption and aerobic sludge granulation

Xinyuan Yang; Wenfang Zhu; Fangyuan Chen; Yali Song; Ya Yu; Haifeng Zhuang

doi:10.1016/j.chemosphere.2023.138088

Modified biochar prepared from Retinervus luffae fructus for dyes adsorption and aerobic sludge granulation

Chemosphere. 2023 May:322:138088. doi: 10.1016/j.chemosphere.2023.138088. Epub 2023 Feb 6.

Authors

Xinyuan Yang¹, Wenfang Zhu², Fangyuan Chen¹, Yali Song³, Ya Yu¹, Haifeng Zhuang⁴

Affiliations

¹ School of Civil Engineering and Architecture, Zhejiang University of Science and Technology, Hangzhou, 310000, China.
² School of Civil Engineering and Architecture, Zhejiang University of Science and Technology, Hangzhou, 310000, China; Key Laboratory of Recycling and Eco-treatment of Waste Biomass of Zhejiang Province, Hangzhou, 310023, China. Electronic address: zhuwenfang@zust.edu.cn.
³ School of Civil Engineering and Architecture, Zhejiang University of Science and Technology, Hangzhou, 310000, China; Key Laboratory of Recycling and Eco-treatment of Waste Biomass of Zhejiang Province, Hangzhou, 310023, China.
⁴ School of Environmental and Natural Resources, Zhejiang University of Science and Technology, Hangzhou, 310000, China; Key Laboratory of Recycling and Eco-treatment of Waste Biomass of Zhejiang Province, Hangzhou, 310023, China.

PMID: 36754295
DOI: 10.1016/j.chemosphere.2023.138088

Abstract

Retinervus luffae fructus biochar (RLFB) and ZnCl2 pretreated Retinervus luffae fructus biochar (ZRLFB) were prepared by pyrolysis. The as-prepared biochar was investigated for its applicability as a dye adsorber using sunset yellow (SY) and basic red 46 (BR46) dyes. Additionally, ZRLFB was used for the experimental cultivation of granular sludge. The results indicated that the adsorption effect of ZRLFB on the two dyes was higher than RLFB. The adsorption of RLFB to SY was related to the Langmuir and Freundlich models, whereas the adsorption of RLFB-BR46, ZRLFB-SY, and ZRLFB-BR46 was more in line with the Langmuir model. The adsorption process of dyes on two kinds of biochars can be described using pseudo-second-order mechanisms. The maximum adsorption capacity obtained was 1.9586 (RLFB-SY), 6.1286 (RLFB-BR46), 49.2611 (ZRLFB-SY), and 181.4882 mg g^-1 (RLFB-BR46). The result of the SBR operation showed that ZRLFB can potentially be applied as the core of aerobic granular sludge.

Keywords: Adsorption; Biochar; Dye; Isotherm; Kinetics; Sludge size.

MeSH terms

Adsorption
Charcoal
Coloring Agents
Hydrogen-Ion Concentration
Kinetics
Sewage*
Water Pollutants, Chemical*

Substances

biochar
Sewage
Coloring Agents
Charcoal
basic red 46
6-hydroxy-5-((p- sulfophenyl)azo)-2-naphthalenesulfonic acid disodium salt
Water Pollutants, Chemical