Isotherm equilibria of Mn2+ biosorption in drinking water treatment by locally isolated Bacillus species and sewage activated sludge

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Abstract

Manganese (Mn2+) is one of the inorganic contaminant that causes problem to water treatment and water distribution due to the accumulation on water piping systems. In this study, Bacillus sp. and sewage activated sludge (SAS) were investigated as biosorbents in laboratory-scale experiments. The study showed that Bacillus sp. was a more effective biosorbent than SAS. The experimental data were fitted to the Langmuir (Langmuir-1 & Langmuir-2), Freundlich, Temkin, Dubinin-Radushkevich (D-R) and Redlich-Peterson (R-P) isotherms to obtain the characteristic parameters of each model. Mn2+ biosorption by Bacillus sp. was found to be significantly better fitted to the Langmuir-1 isotherm than the other isotherms, while the D-R isotherm was the best fit for SAS; i.e., the χ2 value was smaller than that for the Freundlich, Temkin, and R-P isotherms. According to the evaluation using the Langmuir-1 isotherm, the maximum biosorption capacities of Mn2+ onto Bacillus sp. and SAS were 43.5 mg Mn2+/g biomass and 12.7 mg Mn2+/g biomass, respectively. The data fitted using the D-R isotherm showed that the Mn2+ biosorption processes by both Bacillus sp. and SAS occurred via the chemical ion-exchange mechanism between the functional groups and Mn2+ ion.

Original languageEnglish
Pages (from-to)34-43
Number of pages10
JournalJournal of Environmental Management
Volume111
DOIs
Publication statusPublished - 30 Nov 2012

Fingerprint

Biosorption
Sewage sludge
Bacilli
Sewage
Water treatment
Potable water
Isotherms
activated sludge
isotherm
sewage
Biomass
Water piping systems
biomass
piping
drinking water treatment
Functional groups
functional group
Manganese
manganese
ion exchange

Keywords

  • Bacillus sp.
  • Drinking water treatment
  • Isotherm model
  • Mn biosorption
  • Sewage activated sludge

ASJC Scopus subject areas

  • Environmental Engineering
  • Waste Management and Disposal
  • Management, Monitoring, Policy and Law

Cite this

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title = "Isotherm equilibria of Mn2+ biosorption in drinking water treatment by locally isolated Bacillus species and sewage activated sludge",
abstract = "Manganese (Mn2+) is one of the inorganic contaminant that causes problem to water treatment and water distribution due to the accumulation on water piping systems. In this study, Bacillus sp. and sewage activated sludge (SAS) were investigated as biosorbents in laboratory-scale experiments. The study showed that Bacillus sp. was a more effective biosorbent than SAS. The experimental data were fitted to the Langmuir (Langmuir-1 & Langmuir-2), Freundlich, Temkin, Dubinin-Radushkevich (D-R) and Redlich-Peterson (R-P) isotherms to obtain the characteristic parameters of each model. Mn2+ biosorption by Bacillus sp. was found to be significantly better fitted to the Langmuir-1 isotherm than the other isotherms, while the D-R isotherm was the best fit for SAS; i.e., the χ2 value was smaller than that for the Freundlich, Temkin, and R-P isotherms. According to the evaluation using the Langmuir-1 isotherm, the maximum biosorption capacities of Mn2+ onto Bacillus sp. and SAS were 43.5 mg Mn2+/g biomass and 12.7 mg Mn2+/g biomass, respectively. The data fitted using the D-R isotherm showed that the Mn2+ biosorption processes by both Bacillus sp. and SAS occurred via the chemical ion-exchange mechanism between the functional groups and Mn2+ ion.",
keywords = "Bacillus sp., Drinking water treatment, Isotherm model, Mn biosorption, Sewage activated sludge",
author = "{Abu Hasan}, Hassimi and {Sheikh Abdullah}, {Siti Rozaimah} and {Tan Kofli}, Noorhisham and Kamarudin, {Siti Kartom}",
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T1 - Isotherm equilibria of Mn2+ biosorption in drinking water treatment by locally isolated Bacillus species and sewage activated sludge

AU - Abu Hasan, Hassimi

AU - Sheikh Abdullah, Siti Rozaimah

AU - Tan Kofli, Noorhisham

AU - Kamarudin, Siti Kartom

PY - 2012/11/30

Y1 - 2012/11/30

N2 - Manganese (Mn2+) is one of the inorganic contaminant that causes problem to water treatment and water distribution due to the accumulation on water piping systems. In this study, Bacillus sp. and sewage activated sludge (SAS) were investigated as biosorbents in laboratory-scale experiments. The study showed that Bacillus sp. was a more effective biosorbent than SAS. The experimental data were fitted to the Langmuir (Langmuir-1 & Langmuir-2), Freundlich, Temkin, Dubinin-Radushkevich (D-R) and Redlich-Peterson (R-P) isotherms to obtain the characteristic parameters of each model. Mn2+ biosorption by Bacillus sp. was found to be significantly better fitted to the Langmuir-1 isotherm than the other isotherms, while the D-R isotherm was the best fit for SAS; i.e., the χ2 value was smaller than that for the Freundlich, Temkin, and R-P isotherms. According to the evaluation using the Langmuir-1 isotherm, the maximum biosorption capacities of Mn2+ onto Bacillus sp. and SAS were 43.5 mg Mn2+/g biomass and 12.7 mg Mn2+/g biomass, respectively. The data fitted using the D-R isotherm showed that the Mn2+ biosorption processes by both Bacillus sp. and SAS occurred via the chemical ion-exchange mechanism between the functional groups and Mn2+ ion.

AB - Manganese (Mn2+) is one of the inorganic contaminant that causes problem to water treatment and water distribution due to the accumulation on water piping systems. In this study, Bacillus sp. and sewage activated sludge (SAS) were investigated as biosorbents in laboratory-scale experiments. The study showed that Bacillus sp. was a more effective biosorbent than SAS. The experimental data were fitted to the Langmuir (Langmuir-1 & Langmuir-2), Freundlich, Temkin, Dubinin-Radushkevich (D-R) and Redlich-Peterson (R-P) isotherms to obtain the characteristic parameters of each model. Mn2+ biosorption by Bacillus sp. was found to be significantly better fitted to the Langmuir-1 isotherm than the other isotherms, while the D-R isotherm was the best fit for SAS; i.e., the χ2 value was smaller than that for the Freundlich, Temkin, and R-P isotherms. According to the evaluation using the Langmuir-1 isotherm, the maximum biosorption capacities of Mn2+ onto Bacillus sp. and SAS were 43.5 mg Mn2+/g biomass and 12.7 mg Mn2+/g biomass, respectively. The data fitted using the D-R isotherm showed that the Mn2+ biosorption processes by both Bacillus sp. and SAS occurred via the chemical ion-exchange mechanism between the functional groups and Mn2+ ion.

KW - Bacillus sp.

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KW - Mn biosorption

KW - Sewage activated sludge

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