Grape pomace and its secondary waste management: Biochar production for a broad range of lead (Pb) removal from water

Qing Jin; Zixuan Wang; Yiming Feng; Young-Teck Kim; Amanda C Stewart; Sean F O'Keefe; Andrew P Neilson; Zhen He; Haibo Huang

doi:10.1016/j.envres.2020.109442

Grape pomace and its secondary waste management: Biochar production for a broad range of lead (Pb) removal from water

Environ Res. 2020 Jul:186:109442. doi: 10.1016/j.envres.2020.109442. Epub 2020 Apr 1.

Authors

Qing Jin¹, Zixuan Wang², Yiming Feng¹, Young-Teck Kim³, Amanda C Stewart¹, Sean F O'Keefe¹, Andrew P Neilson⁴, Zhen He⁵, Haibo Huang⁶

Affiliations

¹ Department of Food Science and Technology, Virginia Polytechnic Institute and State University, 1230 Washington St. SW, Blacksburg, VA, 24061, USA.
² Department of Energy, Environmental and Chemical Engineering, Washington University in St. Louis, One Brookings Drive, St. Louis, MO, 63130, USA.
³ Department of Sustainable Biomaterials, Virginia Polytechnic Institute and State University, 230 Cheatham Hall, Blacksburg, VA, 24061, USA.
⁴ Department of Food, Bioprocessing and Nutrition Sciences, North Carolina State University, 600 Laureate Way, Kannapolis, NC, 28081, USA.
⁵ Department of Energy, Environmental and Chemical Engineering, Washington University in St. Louis, One Brookings Drive, St. Louis, MO, 63130, USA. Electronic address: huang151@vt.edu.
⁶ Department of Food Science and Technology, Virginia Polytechnic Institute and State University, 1230 Washington St. SW, Blacksburg, VA, 24061, USA. Electronic address: zhenhe@wustl.edu.

PMID: 32302873
DOI: 10.1016/j.envres.2020.109442

Abstract

Grape pomace (GP) management has been a challenge worldwide. We have previously demonstrated a biorefinery process to recover oil and polyphenols, and produce biofuels from GP sequentially, although over 50% of GP solid waste remains post-processing. To approach zero solid waste during GP processing, herein a pyrolysis process was designed for converting GP and its secondary processing wastes to biochars, which were then evaluated for lead (Pb) adsorption from water. GP lignin pyrolyzed at 700 °C (GPL2₇₀₀ biochar) with specific surface area of 485 m²/g showed the highest Pb adsorption capacity, and achieved 66.5% of Pb removal from an initially high concentration of 300 mg/L within 30 min. At low initial Pb concentrations (50-3000 μg/L), GPL2₇₀₀ biochar could reduce Pb concentrations to 0.208-77.2 μg/L. In addition, experimental and modeling results revealed that both physisorption and chemisorption mechanisms were involved in the adsorption process of GPL2₇₀₀ biochar.

Keywords: Adsorption mechanism; Biochar; Grape pomace; Pb; Water contamination.

Publication types

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

MeSH terms

Adsorption
Charcoal
Lead
Vitis*
Wastewater
Water*

Substances

Waste Water
biochar
Water
Charcoal
Lead