Adsorption antagonism and synergy of arsenate(V) and cadmium(II) onto Fe-modified rice straw biochars

Youchi Zhang, Jiajun Fan, Minglai Fu, Yong Sik Ok, Yanwei Hou, Chao Cai

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Arsenic-containing water poses a serious threat to human health. In this study, two types of Fe-modified rice straw biochars [(Fe-impregnated biochar (FeIm char) and pre-modified rice straw biochar (PMRS char)] were prepared, in which three ratios [1, 5, and 10% (w/w)] of Fe modification were evaluated, resulting in six different Fe-modified biochars. Then, a series of adsorption experiments, using single- and binary-metal solutions of As(V) and Cd(II), were conducted to investigate the performances of modified biochars on metal adsorption compared to pristine rice straw biochar (RS char). Results indicated Fe modification improved the As(V) adsorption capacity of biochar. PMRS char showed higher adsorption of As(V) than FeIm char. At the 5% Fe modification ratio (FMR), the As(V) removal by PMRS char (at 10 g/L dosage) from 100 mg/L As(V) solution was approximately 69.6%, which was higher than 46.1% of FeIm char or 22.6% of RS char. In contrast, the adsorption of Cd(II) was decreased after modified at 5 or 10% FMR. Interestingly, for treating solution containing As(V) and Cd(II) together, the adsorption of As(V) onto FeIm char or PMRS char prepared at 5 or 10% FMR remained higher than that onto RS char, while the simultaneous removal of Cd(II) ion by either modified biochar was kept over 50%. Thus, the finding of this study suggested Fe-modified biochars, especially prepared via the pyrolysis of FeCl3 pre-soaking rice straw, could be a promising adsorbent for the remediation of complex As(V)-containing wastewater.

Original languageEnglish
Pages (from-to)1-12
Number of pages12
JournalEnvironmental Geochemistry and Health
DOIs
Publication statusAccepted/In press - 2017 May 26
Externally publishedYes

Fingerprint

antagonism
Straw
arsenate
Cadmium
straw
cadmium
rice
adsorption
Adsorption
biochar
arsenic acid
metal
Metals
Remediation
Arsenic
Adsorbents
pyrolysis
arsenic
Wastewater
Pyrolysis

Keywords

  • Adsorption
  • Arsenate
  • Biochar
  • Cadmium
  • Iron modification

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Water Science and Technology
  • Environmental Science(all)
  • Geochemistry and Petrology

Cite this

Adsorption antagonism and synergy of arsenate(V) and cadmium(II) onto Fe-modified rice straw biochars. / Zhang, Youchi; Fan, Jiajun; Fu, Minglai; Ok, Yong Sik; Hou, Yanwei; Cai, Chao.

In: Environmental Geochemistry and Health, 26.05.2017, p. 1-12.

Research output: Contribution to journalArticle

@article{befbd2201fac429f80c10b34a49f01e6,
title = "Adsorption antagonism and synergy of arsenate(V) and cadmium(II) onto Fe-modified rice straw biochars",
abstract = "Arsenic-containing water poses a serious threat to human health. In this study, two types of Fe-modified rice straw biochars [(Fe-impregnated biochar (FeIm char) and pre-modified rice straw biochar (PMRS char)] were prepared, in which three ratios [1, 5, and 10{\%} (w/w)] of Fe modification were evaluated, resulting in six different Fe-modified biochars. Then, a series of adsorption experiments, using single- and binary-metal solutions of As(V) and Cd(II), were conducted to investigate the performances of modified biochars on metal adsorption compared to pristine rice straw biochar (RS char). Results indicated Fe modification improved the As(V) adsorption capacity of biochar. PMRS char showed higher adsorption of As(V) than FeIm char. At the 5{\%} Fe modification ratio (FMR), the As(V) removal by PMRS char (at 10 g/L dosage) from 100 mg/L As(V) solution was approximately 69.6{\%}, which was higher than 46.1{\%} of FeIm char or 22.6{\%} of RS char. In contrast, the adsorption of Cd(II) was decreased after modified at 5 or 10{\%} FMR. Interestingly, for treating solution containing As(V) and Cd(II) together, the adsorption of As(V) onto FeIm char or PMRS char prepared at 5 or 10{\%} FMR remained higher than that onto RS char, while the simultaneous removal of Cd(II) ion by either modified biochar was kept over 50{\%}. Thus, the finding of this study suggested Fe-modified biochars, especially prepared via the pyrolysis of FeCl3 pre-soaking rice straw, could be a promising adsorbent for the remediation of complex As(V)-containing wastewater.",
keywords = "Adsorption, Arsenate, Biochar, Cadmium, Iron modification",
author = "Youchi Zhang and Jiajun Fan and Minglai Fu and Ok, {Yong Sik} and Yanwei Hou and Chao Cai",
year = "2017",
month = "5",
day = "26",
doi = "10.1007/s10653-017-9984-8",
language = "English",
pages = "1--12",
journal = "Environmental Geochemistry and Health",
issn = "0269-4042",
publisher = "Springer Netherlands",

}

TY - JOUR

T1 - Adsorption antagonism and synergy of arsenate(V) and cadmium(II) onto Fe-modified rice straw biochars

AU - Zhang, Youchi

AU - Fan, Jiajun

AU - Fu, Minglai

AU - Ok, Yong Sik

AU - Hou, Yanwei

AU - Cai, Chao

PY - 2017/5/26

Y1 - 2017/5/26

N2 - Arsenic-containing water poses a serious threat to human health. In this study, two types of Fe-modified rice straw biochars [(Fe-impregnated biochar (FeIm char) and pre-modified rice straw biochar (PMRS char)] were prepared, in which three ratios [1, 5, and 10% (w/w)] of Fe modification were evaluated, resulting in six different Fe-modified biochars. Then, a series of adsorption experiments, using single- and binary-metal solutions of As(V) and Cd(II), were conducted to investigate the performances of modified biochars on metal adsorption compared to pristine rice straw biochar (RS char). Results indicated Fe modification improved the As(V) adsorption capacity of biochar. PMRS char showed higher adsorption of As(V) than FeIm char. At the 5% Fe modification ratio (FMR), the As(V) removal by PMRS char (at 10 g/L dosage) from 100 mg/L As(V) solution was approximately 69.6%, which was higher than 46.1% of FeIm char or 22.6% of RS char. In contrast, the adsorption of Cd(II) was decreased after modified at 5 or 10% FMR. Interestingly, for treating solution containing As(V) and Cd(II) together, the adsorption of As(V) onto FeIm char or PMRS char prepared at 5 or 10% FMR remained higher than that onto RS char, while the simultaneous removal of Cd(II) ion by either modified biochar was kept over 50%. Thus, the finding of this study suggested Fe-modified biochars, especially prepared via the pyrolysis of FeCl3 pre-soaking rice straw, could be a promising adsorbent for the remediation of complex As(V)-containing wastewater.

AB - Arsenic-containing water poses a serious threat to human health. In this study, two types of Fe-modified rice straw biochars [(Fe-impregnated biochar (FeIm char) and pre-modified rice straw biochar (PMRS char)] were prepared, in which three ratios [1, 5, and 10% (w/w)] of Fe modification were evaluated, resulting in six different Fe-modified biochars. Then, a series of adsorption experiments, using single- and binary-metal solutions of As(V) and Cd(II), were conducted to investigate the performances of modified biochars on metal adsorption compared to pristine rice straw biochar (RS char). Results indicated Fe modification improved the As(V) adsorption capacity of biochar. PMRS char showed higher adsorption of As(V) than FeIm char. At the 5% Fe modification ratio (FMR), the As(V) removal by PMRS char (at 10 g/L dosage) from 100 mg/L As(V) solution was approximately 69.6%, which was higher than 46.1% of FeIm char or 22.6% of RS char. In contrast, the adsorption of Cd(II) was decreased after modified at 5 or 10% FMR. Interestingly, for treating solution containing As(V) and Cd(II) together, the adsorption of As(V) onto FeIm char or PMRS char prepared at 5 or 10% FMR remained higher than that onto RS char, while the simultaneous removal of Cd(II) ion by either modified biochar was kept over 50%. Thus, the finding of this study suggested Fe-modified biochars, especially prepared via the pyrolysis of FeCl3 pre-soaking rice straw, could be a promising adsorbent for the remediation of complex As(V)-containing wastewater.

KW - Adsorption

KW - Arsenate

KW - Biochar

KW - Cadmium

KW - Iron modification

UR - http://www.scopus.com/inward/record.url?scp=85019760022&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85019760022&partnerID=8YFLogxK

U2 - 10.1007/s10653-017-9984-8

DO - 10.1007/s10653-017-9984-8

M3 - Article

C2 - 28550600

AN - SCOPUS:85019760022

SP - 1

EP - 12

JO - Environmental Geochemistry and Health

JF - Environmental Geochemistry and Health

SN - 0269-4042

ER -