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

Fan Yang; Shuaishuai Zhang; Yuqing Sun; Daniel C.W. Tsang; Kui Cheng; Yong Sik Ok

doi:10.1016/j.jhazmat.2018.11.047

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

Fan Yang^*
, Shuaishuai Zhang
, Yuqing Sun
, Daniel C.W. Tsang
, Kui Cheng
, Yong Sik Ok

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

311 Citations (Scopus)

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.

Original language	English
Pages (from-to)	665-673
Number of pages	9
Journal	Journal of hazardous materials
Volume	365
DOIs	https://doi.org/10.1016/j.jhazmat.2018.11.047
Publication status	Published - 2019 Mar 5

Bibliographical note

Publisher Copyright:
© 2018 Elsevier B.V.

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 2 Zero Hunger

Keywords

Biomass waste valorization
Engineered biochar
Mineral-biochar composites
Resource recovery
Wastewater treatment

ASJC Scopus subject areas

Environmental Engineering
Environmental Chemistry
Waste Management and Disposal
Pollution
Health, Toxicology and Mutagenesis

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10.1016/j.jhazmat.2018.11.047

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title = "Assembling biochar with various layered double hydroxides for enhancement of phosphorus recovery",

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.",

keywords = "Biomass waste valorization, Engineered biochar, Mineral-biochar composites, Resource recovery, Wastewater treatment",

author = "Fan Yang and Shuaishuai Zhang and Yuqing Sun and Tsang, \{Daniel C.W.\} and Kui Cheng and Ok, \{Yong Sik\}",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier B.V.",

year = "2019",

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day = "5",

doi = "10.1016/j.jhazmat.2018.11.047",

language = "English",

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AU - Yang, Fan

AU - Zhang, Shuaishuai

AU - Sun, Yuqing

AU - Tsang, Daniel C.W.

AU - Cheng, Kui

AU - Ok, Yong Sik

PY - 2019/3/5

Y1 - 2019/3/5

N2 - 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.

AB - 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.

KW - Biomass waste valorization

KW - Engineered biochar

KW - Mineral-biochar composites

KW - Resource recovery

KW - Wastewater treatment

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SN - 0304-3894

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SP - 665

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JO - Journal of hazardous materials

JF - Journal of hazardous materials

ER -

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

Abstract

Bibliographical note

UN SDGs

Keywords

ASJC Scopus subject areas

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