Batch interaction of emerging tetracycline contaminant with novel phosphoric acid activated corn straw porous carbon: Adsorption rate and nature of mechanism

Qiliang Yang; Pingxiao Wu; Juan Liu; Saeed Rehman; Zubair Ahmed; Bo Ruan; Nengwu Zhu

doi:10.1016/j.envres.2019.108899

Batch interaction of emerging tetracycline contaminant with novel phosphoric acid activated corn straw porous carbon: Adsorption rate and nature of mechanism

Environ Res. 2020 Feb:181:108899. doi: 10.1016/j.envres.2019.108899. Epub 2019 Nov 7.

Authors

Qiliang Yang¹, Pingxiao Wu², Juan Liu¹, Saeed Rehman¹, Zubair Ahmed¹, Bo Ruan¹, Nengwu Zhu¹

Affiliations

¹ School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China.
² School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou, 510006, China; Guangdong Provincial Engineering and Technology Research Center for Environmental Risk Prevention and Emergency Disposal, South China University of Technology, Guangzhou, 510006, China; Guangdong Engineering and Technology Research Center for Environmental Nanomaterials, Guangzhou, 510006, China. Electronic address: pppxwu@scut.edu.cn.

PMID: 31740041
DOI: 10.1016/j.envres.2019.108899

Abstract

In this work, corn straw (CS) based porous carbon was prepared by one-step phosphoric acid (H₃PO₄) low temperature activation. The impregnation ratios (H₃PO₄/CS, g/g) played an important role in the pore development. ACS_300-1 engineered at 300 °C and the impregnation ratio of 1.0 showed the maximal specific surface area of 463.89 m²/g with total pore volume of 0.387 cm³/g, attaining a high tetracycline (TC) uptake of 227.3 mg/g. The adsorption of TC onto ACS_300-1 was found tolerant with wide pH (2.0-10.0) and high ionic strength (0 - 0.5 M). The adsorption data can be fitted well by the pseudo-second order kinetic model and Langmuir isotherm model. The endothermic and spontaneous properties of the adsorption system was implied by Thermodynamic study. The findings of the current work conclude that one-step H₃PO₄ activation is a green and promising method for corn straw based porous carbon that may be found with great potentials in antibiotic containing wastewater treatment.

Keywords: Adsorption; Phosphoric acid activation; Porous carbon; Tetracycline.

Publication types

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

MeSH terms

Adsorption
Anti-Bacterial Agents*
Carbon*
Hydrogen-Ion Concentration
Kinetics
Phosphoric Acids
Porosity
Temperature
Tetracycline*
Water Pollutants, Chemical*
Zea mays

Substances

Anti-Bacterial Agents
Phosphoric Acids
Water Pollutants, Chemical
Carbon
phosphoric acid
Tetracycline