期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 365, 期 -, 页码 665-673出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2018.11.047
关键词
Engineered biochar; Mineral-biochar composites; Resource recovery; Biomass waste valorization; Wastewater treatment
资金
- University Nursing Program for Young Scholars with Creative Talents in Heilongjiang Province [UNPYSCT-2017018]
- National Natural Science Fund for Young Scholars [31600413]
- Natural Science Foundation of Heilongjiang Province of China [QC2018019]
- Hong Kong Research Grants Council [PolyU 15217818]
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
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据