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Efficient removal of pefloxacin from aqueous solution by acid-alkali modified sludge-based biochar: adsorption kinetics, isotherm, thermodynamics, and mechanism
Huang, Hongli; Zheng, Yongxin; Wei, Dongning; Yang, Guang; Peng, Xin; Fan, Lingjia; Luo, Lin; Zhou, Yaoyu
2022-06
Source PublicationENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
ISSN0944-1344
Volume29Issue:28Pages:43201-43211
AbstractIn this paper, one kind of acid-alkali modified sludge-based biochar (ASBC) was synthesized, characterized, and employed as adsorbent for the removal of pefloxacin. The characterization results showed that the specific surface area (SSA) of ASBC (53.381 m(2)/g) was significantly higher than that of SBC (24.411 m(2)/g). ASBC had a rougher surface, larger particle distribution, lower zero point charge, and richer functional groups (e.g., C-O and O-H) than SBC. The adsorption capacity of ASBC was 1.82 times than that of SBC. After 8 adsorption cycles in reuse experiment, the adsorption capacity of ASBC for pefloxacin still reached 144.08 mg/L, indicating that ASBC has good reusability. Static experiments showed that the optimal pH value was 6.0 in the adsorption of pefloxacin on SBC and ASBC. The result of adsorption kinetics indicated that the pseudo-second-order model could describe well the adsorption process. The Freundlich model was better than the Langmuir model to describe the adsorption of pefloxacin by ASBC, indicating that the adsorption process was mainly multilayer adsorption. Thermodynamic result showed that the adsorption of pefloxacin by ASBC was spontaneous and endothermic. The removal mechanism of pefloxacin by ASBC is mainly the substitution reaction and pi-pi EDA interaction. In summary, acid-alkali modified biochar is an effective adsorbent for pefloxacin in aqueous solution, and has great application prospects.
Department城市与区域生态国家重点实验室 ; 城市与区域生态国家重点实验室
KeywordACTIVATED CARBON SEWAGE-SLUDGE FLUOROQUINOLONE ANTIBIOTICS METHYLENE-BLUE POROUS CARBON CU(II) IONS TETRACYCLINE EQUILIBRIUM SOILS WATER
Document Type期刊论文
Identifierhttps://ir.rcees.ac.cn/handle/311016/47241
Collection城市与区域生态国家重点实验室
Corresponding AuthorZhou, Yaoyu
Affiliation1.Hunan Agr Univ, Coll Resources & Environm, Hunan Int Sci & Technol Cooperat Base Agr Typ Pol, Changsha 410128, Peoples R China
2.Yueyang Acad Agr Sci, Yueyang 414000, Peoples R China
3.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, Beijing 100085, Peoples R China
Recommended Citation
GB/T 7714
Huang, Hongli,Zheng, Yongxin,Wei, Dongning,et al. Efficient removal of pefloxacin from aqueous solution by acid-alkali modified sludge-based biochar: adsorption kinetics, isotherm, thermodynamics, and mechanism[J]. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,2022,29(28):43201-43211.
APA Huang, Hongli.,Zheng, Yongxin.,Wei, Dongning.,Yang, Guang.,Peng, Xin.,...&Zhou, Yaoyu.(2022).Efficient removal of pefloxacin from aqueous solution by acid-alkali modified sludge-based biochar: adsorption kinetics, isotherm, thermodynamics, and mechanism.ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,29(28),43201-43211.
MLA Huang, Hongli,et al."Efficient removal of pefloxacin from aqueous solution by acid-alkali modified sludge-based biochar: adsorption kinetics, isotherm, thermodynamics, and mechanism".ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH 29.28(2022):43201-43211.
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