Assembling biochar with various layered double hydroxides for enhancement of phosphorus recovery
- Authors
- Yang, Fan; Zhang, Shuaishuai; Sun, Yuqing; Tsang, Daniel C. W.; Cheng, Kui; Ok, Yong Sik
- Issue Date
- 5-Mar-2019
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- Engineered biochar; Mineral-biochar composites; Resource recovery; Biomass waste valorization; Wastewater treatment
- Citation
- JOURNAL OF HAZARDOUS MATERIALS, v.365, pp.665 - 673
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF HAZARDOUS MATERIALS
- Volume
- 365
- Start Page
- 665
- End Page
- 673
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/67006
- DOI
- 10.1016/j.jhazmat.2018.11.047
- ISSN
- 0304-3894
- Abstract
- Highly efficient and cost-effective adsorbents for phosphate (P) recovery are the key to control eutrophication and recover phosphorus from waste streams to enhance food production. This study assembled corn stalk-derived biochar (BC) with various forms of layered double hydroxides (LDHs) (B-M-LDH) through simultaneous pyrolysis of waste biomass and metal (i.e., Zn/Al, Mg/Al, and Ni/Fe) hydroxide precipitates. Batch sorption experiments evaluated the kinetics and isotherms of phosphate adsorption as well as the influence of pH value and co-existing anions. Morphological characterization showed that crystalline LDH flakes were impregnated within the framework of fabricated B-M-LDH composites. Superior P adsorption capacity (152.1 mg (P) g(-1)) and fast Elovich kinetics (5925 mg g(-1) h(-1)) could be achieved by the B-Zn/Al-LDH composite at pH 5. The P adsorption onto BC-LDHs was pH dependent and subjected to adverse influence of co-existing anions. Interlayer anion exchange and surface complexation were probably the predominant adsorption mechanisms at the studied phosphate concentration. Therefore, BC can be functionalized as mineral composites for enhancing P recovery and wastewater treatment
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Collections - College of Life Sciences and Biotechnology > Division of Environmental Science and Ecological Engineering > 1. Journal Articles
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