Engineering pyrolysis biochar via single-step microwave steam activation for hazardous landfill leachate treatment
- Authors
- Lam, Su Shiung; Yek, Peter Nai Yuh; Ok, Yong Sik; Chong, Chi Cheng; Liew, Rock Keey; Tsang, Daniel C. W.; Park, Young-Kwon; Liu, Zhenling; Wong, Chee Swee; Peng, Wanxi
- Issue Date
- 15-May-2020
- Publisher
- ELSEVIER
- Keywords
- Pyrolysis; Biochar; Microwave; Steam activation; Leachate
- Citation
- JOURNAL OF HAZARDOUS MATERIALS, v.390
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF HAZARDOUS MATERIALS
- Volume
- 390
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/55695
- DOI
- 10.1016/j.jhazmat.2019.121649
- ISSN
- 0304-3894
- Abstract
- Improving the sustainability and cost-effectiveness of biochar production is crucial to meet increased global market demand. Here, we developed a single-step microwave steam activation (STMSA) as a simplified yet efficient method to produce microwave activated biochar (MAB) from waste palm shell (WPS). The STMSA recorded a higher heating rate (70 degrees C/min) and higher conversion (45 wt%) of WPS into highly microporous MAB (micropore surface area of 679.22 m(2)/g) in contrast with the conventional heating approach (<= 12-17 wt %). The MAB was then applied as biosorbent for hazardous landfill leachate (LL) treatment and the adsorption performance was compared with commercial activated carbon under different pH, adsorbent quantity, adsorbate concentrations, and contact times. The MAB demonstrated high adsorption capacity, achieving maximum adsorption efficiency at 595 mg/g and 65 % removal of chemical oxygen demand (COD) with 0.4 g/L of adsorbent amount under optimal acidic conditions (pH approximate to 2-3) after 24 h of contact time. The Freundlich isotherm and pseudo second-order kinetic models were well-fitted to explain the equilibrium adsorption and kinetics. The results indicate the viability of STMSA as a fast and efficient approach to produce activated biochar as a biosorbent for the treatment of hazardous landfill leachate.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Life Sciences and Biotechnology > Division of Environmental Science and Ecological Engineering > 1. Journal Articles
![qrcode](https://api.qrserver.com/v1/create-qr-code/?size=55x55&data=https://scholar.korea.ac.kr/handle/2021.sw.korea/55695)
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.