Assembling biochar with various layered double hydroxides for enhancement of phosphorus recovery

被引：250
作者：
Yang, Fan [1 ]
Zhang, Shuaishuai [1 ]
Sun, Yuqing [2 ]
Tsang, Daniel C. W. [2 ]
Cheng, Kui [3 ]
Ok, Yong Sik [4 ,5 ]
机构：
[1] Northeast Agr Univ, Sch Water Conservancy & Civil Engn, Harbin 150030, Heilongjiang, Peoples R China
[2] Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hung Hom, Kowloon, Hong Kong, Peoples R China
[3] Harbin Engn Univ, Coll Mat Sci & Chem Engn, Minist Educ, Key Lab Superlight Mat & Surface Technol, Harbin 150001, Heilongjiang, Peoples R China
[4] Korea Univ, OJERI, Korea Blather Res Ctr, Seoul 02841, South Korea
[5] Korea Univ, Div Environm Sci & Ecol Engn, Seoul 02841, South Korea
来源：
JOURNAL OF HAZARDOUS MATERIALS | 2019年 / 365卷
基金：
黑龙江省自然科学基金;
关键词：
Engineered biochar; Mineral-biochar composites; Resource recovery; Biomass waste valorization; Wastewater treatment; PHOSPHATE ADSORPTION; AQUEOUS-SOLUTION; MG-AL; ENGINEERED/DESIGNER BIOCHAR; REMOVAL; WATER; CARBON; PERFORMANCE; ADSORBENT; COMPOSITE;
D O I：
10.1016/j.jhazmat.2018.11.047
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
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
引用
收藏
页码：665 / 673
页数：9
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