Ultrahigh adsorbability towards different antibiotic residues on fore-modified self-functionalized biochar: Competitive adsorption and mechanism studies

Huiqin Li; Jingtao Hu; Lifen Yao; Qian Shen; Lihui An; Xiaojing Wang

doi:10.1016/j.jhazmat.2020.122127

Ultrahigh adsorbability towards different antibiotic residues on fore-modified self-functionalized biochar: Competitive adsorption and mechanism studies

J Hazard Mater. 2020 May 15:390:122127. doi: 10.1016/j.jhazmat.2020.122127. Epub 2020 Jan 20.

Authors

Huiqin Li¹, Jingtao Hu², Lifen Yao³, Qian Shen³, Lihui An⁴, Xiaojing Wang⁵

Affiliations

¹ Ministry of Education Key Laboratory of Ecology and Resource Use of the Mongolian Plateau & Inner Mongolia Key Laboratory of Environmental Pollution Control and Waste Resource Recycle, School of Ecology and Environment, Inner Mongolia University, Hohhot, 010021, China; State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China.
² Inner Mongolia Key Laboratory of Chemistry and Physics of Rare Earth Materials, School of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, 010021, China; Emission Trading Management Center of Inner Mongolia, Hohhot, 010011, China.
³ State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China.
⁴ State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China. Electronic address: anlhui@163.com.
⁵ Inner Mongolia Key Laboratory of Chemistry and Physics of Rare Earth Materials, School of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, 010021, China. Electronic address: wang_xiao_jing@hotmail.com.

PMID: 32005533
DOI: 10.1016/j.jhazmat.2020.122127

Abstract

An ultrasonic-assistant fore-modified method was designed to develop the self-functionalized biochar (SFB) with enhanced adsorbability. Characterized by different morphologies, SFB was presenting particular groups of carbon micro-spheres. Possessing ultrahigh surface area of 2368 m²/g, SFB exhibited excellent adsorption capacity (up to 497 mg/g) towards traditional antibiotic. Besides, more functional groups, which played important roles on the solid-liquid interface interaction, posed on the surface of SFB. The removal efficiency of levofloxacin was up to 99.93 % in the competitive system. Adsorption mechanism was analyzed based on the results of FTIR, kinetics, isotherms and competitive adsorption experiments. The chemisorption affinity on the solid-liquid interface was strong enough, which was proved by isotherms, thermodynamics and K_d analyses. Meanwhile, SFB has presented a good resistance against humid acid interference in aqueous environment. Thus, the ultrasonic-assistant fore-modified method was potential in dramatically improving the feature of biochars. SFB presented excellent adsorbability to antibiotics and exhibits extraordinary potential in wastewater treatment.

Keywords: Antibiotic; Competitive adsorption; Fore-modified; Mechanism studies; Ultrasonic-assistant.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Adsorption
Anti-Bacterial Agents / chemistry*
Charcoal / chemistry*
Levofloxacin / chemistry*
Ultrasonic Waves*
Water Pollutants, Chemical / chemistry*
Water Purification / methods*

Substances

Anti-Bacterial Agents
Water Pollutants, Chemical
biochar
Charcoal
Levofloxacin