Removal of arsenite(As(III)) and arsenate(As(V)) by synthetic pyrite (FeS2): Synthesis, effect of contact time, and sorption/desorption envelopes

Dong Suk Han, Jin Kun Song, Bill Batchelor, Ahmed Abdel-Wahab

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

Reliable techniques for synthesizing pyrite are necessary in order to develop effective treatment methods that use pyrite to remove arsenic from water and to stabilize arsenic in wastes. The Fe3+/HS- values of 0.500 and 0.571 at 60°C and pH values ranging from 3.6 through 5.6 were found to produce pyrite most efficiently. Removal of As(V) was faster than removal of As(III) and the extent of removal of both As(III) and As(V) were more accurately described by the Langmuir adsorption model. Removal of As(III) was observed to increase as pH increased across the range investigated (pH 7-10). However, an optimum pH in the range between pH 8 and pH 9 was observed for removal of As(V). Sorption envelopes for As(III) showed low removal at low pH, increasing removal as pH was increased and moderate irreversibility as pH was titrated backward. Sorption envelopes for As(V) showed similar behavior except low removals were observed initially at high pH, removals increased as pH decreased and moderate to high levels of irreversibility were observed as pH was raised back to the initial values.

Original languageEnglish
Pages (from-to)311-318
Number of pages8
JournalJournal of Colloid and Interface Science
Volume392
Issue number1
DOIs
Publication statusPublished - 15 Feb 2013

Fingerprint

Pyrites
Sorption
Desorption
Arsenic
pyrite
arsenic acid
arsenite
Adsorption
Water

Keywords

  • Arsenate
  • Arsenite
  • Desorption
  • Pyrite
  • Sorption
  • Synthesis

ASJC Scopus subject areas

  • Surfaces, Coatings and Films
  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Colloid and Surface Chemistry

Cite this

@article{2debf08a69934536b0778a5aed23b191,
title = "Removal of arsenite(As(III)) and arsenate(As(V)) by synthetic pyrite (FeS2): Synthesis, effect of contact time, and sorption/desorption envelopes",
abstract = "Reliable techniques for synthesizing pyrite are necessary in order to develop effective treatment methods that use pyrite to remove arsenic from water and to stabilize arsenic in wastes. The Fe3+/HS- values of 0.500 and 0.571 at 60°C and pH values ranging from 3.6 through 5.6 were found to produce pyrite most efficiently. Removal of As(V) was faster than removal of As(III) and the extent of removal of both As(III) and As(V) were more accurately described by the Langmuir adsorption model. Removal of As(III) was observed to increase as pH increased across the range investigated (pH 7-10). However, an optimum pH in the range between pH 8 and pH 9 was observed for removal of As(V). Sorption envelopes for As(III) showed low removal at low pH, increasing removal as pH was increased and moderate irreversibility as pH was titrated backward. Sorption envelopes for As(V) showed similar behavior except low removals were observed initially at high pH, removals increased as pH decreased and moderate to high levels of irreversibility were observed as pH was raised back to the initial values.",
keywords = "Arsenate, Arsenite, Desorption, Pyrite, Sorption, Synthesis",
author = "Han, {Dong Suk} and Song, {Jin Kun} and Bill Batchelor and Ahmed Abdel-Wahab",
year = "2013",
month = "2",
day = "15",
doi = "10.1016/j.jcis.2012.09.084",
language = "English",
volume = "392",
pages = "311--318",
journal = "Journal of Colloid and Interface Science",
issn = "0021-9797",
publisher = "Academic Press Inc.",
number = "1",

}

TY - JOUR

T1 - Removal of arsenite(As(III)) and arsenate(As(V)) by synthetic pyrite (FeS2)

T2 - Synthesis, effect of contact time, and sorption/desorption envelopes

AU - Han, Dong Suk

AU - Song, Jin Kun

AU - Batchelor, Bill

AU - Abdel-Wahab, Ahmed

PY - 2013/2/15

Y1 - 2013/2/15

N2 - Reliable techniques for synthesizing pyrite are necessary in order to develop effective treatment methods that use pyrite to remove arsenic from water and to stabilize arsenic in wastes. The Fe3+/HS- values of 0.500 and 0.571 at 60°C and pH values ranging from 3.6 through 5.6 were found to produce pyrite most efficiently. Removal of As(V) was faster than removal of As(III) and the extent of removal of both As(III) and As(V) were more accurately described by the Langmuir adsorption model. Removal of As(III) was observed to increase as pH increased across the range investigated (pH 7-10). However, an optimum pH in the range between pH 8 and pH 9 was observed for removal of As(V). Sorption envelopes for As(III) showed low removal at low pH, increasing removal as pH was increased and moderate irreversibility as pH was titrated backward. Sorption envelopes for As(V) showed similar behavior except low removals were observed initially at high pH, removals increased as pH decreased and moderate to high levels of irreversibility were observed as pH was raised back to the initial values.

AB - Reliable techniques for synthesizing pyrite are necessary in order to develop effective treatment methods that use pyrite to remove arsenic from water and to stabilize arsenic in wastes. The Fe3+/HS- values of 0.500 and 0.571 at 60°C and pH values ranging from 3.6 through 5.6 were found to produce pyrite most efficiently. Removal of As(V) was faster than removal of As(III) and the extent of removal of both As(III) and As(V) were more accurately described by the Langmuir adsorption model. Removal of As(III) was observed to increase as pH increased across the range investigated (pH 7-10). However, an optimum pH in the range between pH 8 and pH 9 was observed for removal of As(V). Sorption envelopes for As(III) showed low removal at low pH, increasing removal as pH was increased and moderate irreversibility as pH was titrated backward. Sorption envelopes for As(V) showed similar behavior except low removals were observed initially at high pH, removals increased as pH decreased and moderate to high levels of irreversibility were observed as pH was raised back to the initial values.

KW - Arsenate

KW - Arsenite

KW - Desorption

KW - Pyrite

KW - Sorption

KW - Synthesis

UR - http://www.scopus.com/inward/record.url?scp=84872348714&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84872348714&partnerID=8YFLogxK

U2 - 10.1016/j.jcis.2012.09.084

DO - 10.1016/j.jcis.2012.09.084

M3 - Article

C2 - 23195771

AN - SCOPUS:84872348714

VL - 392

SP - 311

EP - 318

JO - Journal of Colloid and Interface Science

JF - Journal of Colloid and Interface Science

SN - 0021-9797

IS - 1

ER -