Sorption on zero -valent iron (ZVI) for arsenic removal

Fares Yahya Alshaebi, Wan Zuhairi Wan Yaacob, Abdul Rahim Samsuldin

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

This study investigates the efficiency of Zero Valent Iron (ZVI) to remove arsenic (As) from contaminated water. The objective of this study is to determine the sorption of arsenic by different types of ZVI at different pH, concentrations and time. For this purpose, ZVI was prepared in the laboratory by mixing at different ratios of iron concretions, carbon and limestone (i.e. lime). There were 3 types of ZVI produced in the laboratory, i.e. ZVI-1, ZVI-2, and ZVI-3. ZVI-1 consists of 95% iron concretion, 25% carbon and 2.5% limestone, ZVI-2 comprises of 90% concretion, 5% carbon and 5% limestone while ZVI-3 made of 80% concretion, 10% carbon and 10% limestone. Batch experiments were carried out to study the removal of arsenic (As) under different pH values, different concentrations and different shaking time. Results of the chemical properties showed that ZVI-1 has higher cation exchange capacity (CEC) 35.50-44.92 meq/100g and higher specific surface area (SSA) 24.9-27.45 m2/g compared to other ZVIs. Batch test showed that ZVI-1 has higher adsorption of arsenic with the percentage of removal ranges from 97.02 - 99.95%. In ZVI-2, arsenic (As) adsorption ranges from 94.23-99.94% and in ZVI-3 adsorption ranges from 50.27 to 99.47% in ZVI-3. The results showed that the increasing proportion of carbon and limestone will reduce the ability of the sample to adsorb arsenic. The study concludes that ZVI has high adsorption for arsenic and its sorption capacity is influenced by the contents of carbon and lime, pH and shaking time. Thus, ZVI has a very good potential to be used as permeable reactive barrier to remediate arsenic contaminated water.

Original languageEnglish
Pages (from-to)214-219
Number of pages6
JournalEuropean Journal of Scientific Research
Volume33
Issue number2
Publication statusPublished - 2009

Fingerprint

Sorption
Arsenic
arsenic
Iron
sorption
iron
Zero
Calcium Carbonate
Limestone
Carbon
limestone
concretion
Adsorption
carbon
adsorption
removal
liming materials
Lime
Batch
lime

Keywords

  • Arsenic
  • Batch experiment
  • Iron concretion
  • Sorption
  • Zero Valent iron (ZVI)

ASJC Scopus subject areas

  • General

Cite this

Sorption on zero -valent iron (ZVI) for arsenic removal. / Alshaebi, Fares Yahya; Wan Yaacob, Wan Zuhairi; Samsuldin, Abdul Rahim.

In: European Journal of Scientific Research, Vol. 33, No. 2, 2009, p. 214-219.

Research output: Contribution to journalArticle

Alshaebi, Fares Yahya ; Wan Yaacob, Wan Zuhairi ; Samsuldin, Abdul Rahim. / Sorption on zero -valent iron (ZVI) for arsenic removal. In: European Journal of Scientific Research. 2009 ; Vol. 33, No. 2. pp. 214-219.
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abstract = "This study investigates the efficiency of Zero Valent Iron (ZVI) to remove arsenic (As) from contaminated water. The objective of this study is to determine the sorption of arsenic by different types of ZVI at different pH, concentrations and time. For this purpose, ZVI was prepared in the laboratory by mixing at different ratios of iron concretions, carbon and limestone (i.e. lime). There were 3 types of ZVI produced in the laboratory, i.e. ZVI-1, ZVI-2, and ZVI-3. ZVI-1 consists of 95{\%} iron concretion, 25{\%} carbon and 2.5{\%} limestone, ZVI-2 comprises of 90{\%} concretion, 5{\%} carbon and 5{\%} limestone while ZVI-3 made of 80{\%} concretion, 10{\%} carbon and 10{\%} limestone. Batch experiments were carried out to study the removal of arsenic (As) under different pH values, different concentrations and different shaking time. Results of the chemical properties showed that ZVI-1 has higher cation exchange capacity (CEC) 35.50-44.92 meq/100g and higher specific surface area (SSA) 24.9-27.45 m2/g compared to other ZVIs. Batch test showed that ZVI-1 has higher adsorption of arsenic with the percentage of removal ranges from 97.02 - 99.95{\%}. In ZVI-2, arsenic (As) adsorption ranges from 94.23-99.94{\%} and in ZVI-3 adsorption ranges from 50.27 to 99.47{\%} in ZVI-3. The results showed that the increasing proportion of carbon and limestone will reduce the ability of the sample to adsorb arsenic. The study concludes that ZVI has high adsorption for arsenic and its sorption capacity is influenced by the contents of carbon and lime, pH and shaking time. Thus, ZVI has a very good potential to be used as permeable reactive barrier to remediate arsenic contaminated water.",
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AB - This study investigates the efficiency of Zero Valent Iron (ZVI) to remove arsenic (As) from contaminated water. The objective of this study is to determine the sorption of arsenic by different types of ZVI at different pH, concentrations and time. For this purpose, ZVI was prepared in the laboratory by mixing at different ratios of iron concretions, carbon and limestone (i.e. lime). There were 3 types of ZVI produced in the laboratory, i.e. ZVI-1, ZVI-2, and ZVI-3. ZVI-1 consists of 95% iron concretion, 25% carbon and 2.5% limestone, ZVI-2 comprises of 90% concretion, 5% carbon and 5% limestone while ZVI-3 made of 80% concretion, 10% carbon and 10% limestone. Batch experiments were carried out to study the removal of arsenic (As) under different pH values, different concentrations and different shaking time. Results of the chemical properties showed that ZVI-1 has higher cation exchange capacity (CEC) 35.50-44.92 meq/100g and higher specific surface area (SSA) 24.9-27.45 m2/g compared to other ZVIs. Batch test showed that ZVI-1 has higher adsorption of arsenic with the percentage of removal ranges from 97.02 - 99.95%. In ZVI-2, arsenic (As) adsorption ranges from 94.23-99.94% and in ZVI-3 adsorption ranges from 50.27 to 99.47% in ZVI-3. The results showed that the increasing proportion of carbon and limestone will reduce the ability of the sample to adsorb arsenic. The study concludes that ZVI has high adsorption for arsenic and its sorption capacity is influenced by the contents of carbon and lime, pH and shaking time. Thus, ZVI has a very good potential to be used as permeable reactive barrier to remediate arsenic contaminated water.

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