Food waste based biochars for ammonia nitrogen removal from aqueous solutions

Shan Xue; Xinbo Zhang; Huu Hao Ngo; Wenshan Guo; Haitao Wen; Chaocan Li; Yongchao Zhang; Chanjuan Ma

doi:10.1016/j.biortech.2019.121927

Food waste based biochars for ammonia nitrogen removal from aqueous solutions

Bioresour Technol. 2019 Nov:292:121927. doi: 10.1016/j.biortech.2019.121927. Epub 2019 Jul 30.

Authors

Shan Xue¹, Xinbo Zhang¹, Huu Hao Ngo², Wenshan Guo³, Haitao Wen¹, Chaocan Li¹, Yongchao Zhang¹, Chanjuan Ma¹

Affiliations

¹ Joint Research Centre for Protective Infrastructure Technology and Environmental Green Bioprocess, Department of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin 300384, China; School of Civil and Environmental Engineering, University of Technology Sydney, NSW 2007, Australia; Tianjin Key Laboratory of Aquatic Science and Technology, Tianjin Chengjian University, Jinjing Road 26, Tianjin 300384, China.
² Joint Research Centre for Protective Infrastructure Technology and Environmental Green Bioprocess, Department of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin 300384, China; School of Civil and Environmental Engineering, University of Technology Sydney, NSW 2007, Australia; Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NSW 2007, Australia. Electronic address: ngohuuhao121@gmail.com.
³ Joint Research Centre for Protective Infrastructure Technology and Environmental Green Bioprocess, Department of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin 300384, China; School of Civil and Environmental Engineering, University of Technology Sydney, NSW 2007, Australia; Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NSW 2007, Australia.

PMID: 31398546
DOI: 10.1016/j.biortech.2019.121927

Abstract

Biochar derived from waste has been increasingly considered as a potential green adsorbent due to its significant ability and affordable production costs. This study prepared and evaluated 7 types of food waste-based biochars (FWBBs) (including meat and bone, starchy staples, leafy stemmed vegetables, nut husks, fruit pericarp, bean dreg and tea leaves). The impacts of raw materials, pyrolysis temperatures (300, 400, 500, 600 and 700 °C), and residence time (2 h and 4 h) on the removal of ammonia nitrogen at different ammonia nitrogen concentrations (5, 10, 20, 50, 100, 150 mg/L) were investigated. The batch equilibrium and kinetic experiments confirmed that a FWBB dosage of 3 g/L at 25 °C could remove up to 92.67% ammonia nitrogen. The Langmuir isotherm model had the best fit to equilibrium experimental data with a maximum adsorption capacity of 7.174 mg/g at 25 °C. The pseudo-second order kinetic model well describes the ammonia nitrogen adsorption.

Keywords: Ammonia nitrogen removal; Aqueous solutions; Food waste based biochars; Green adsorbent.

MeSH terms

Adsorption
Ammonia*
Charcoal
Denitrification
Hydrogen-Ion Concentration
Kinetics
Solutions
Water Pollutants, Chemical*

Substances

Solutions
Water Pollutants, Chemical
biochar
Charcoal
Ammonia