Treatment of arsenic contaminated water in a batch reactor by using Ralstonia eutropha MTCC 2487 and granular activated carbon

Mondal, Prasenjit; Majumder, C. B.; Mohanty, Bikash

doi:10.1016/j.jhazmat.2007.09.028

Cited by 89 publications

(48 citation statements)

References 42 publications

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“…However, they suffer from high cost, low efficiency, incomplete metal removal, high reagent and energy requirements, and the generation of secondary pollution [15]. Adsorption technology still remains attractive and represents an innovative and economical approach to arsenic removal [16][17][18].…”

mentioning

confidence: 99%

Continuous Fixed-Bed Column Study and Adsorption Modeling: Removal of Arsenate and Arsenite in Aqueous Solution by Organic Modified Spent Grains

Chen¹,

Wu²,

Chen³

et al. 2017

Pol. J. Environ. Stud.

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Arsenic is of environmental concern because of its toxicity to plants, animals, and humans. Arsenic in drinking water has the greatest impact on the general population and human health. In natural waters arsenic can be found in inorganic forms as oxidized pentavalent arsenate (As(V)) or trivalent arsenite (As(III)), mostly as H 2 AsO 4 -, HAsO 4 2-, H 3 AsO 3 , and H 2 AsO 3 - [1]. As(V) predominates in surface waters, while groundwater may also contain relevant concentrations of As(III) that are more mobile and toxic than As(V) [2]. Elevated concentrations of arsenic in groundwaters of China are the result of biogeochemical processes [3] or anthropogenic activities such as agriculture (the extensive use of herbicides and insecticides) and irregular disposal of hazardous waste from heavy industry [4][5].Long-term exposure through drinking water to even low concentrations of arsenic (≤50 μg/l) can cause Pol. J. Environ. Stud. Vol. 26, No. 4 (2017), 1847-1854 The adsorption of arsenate (As(V)) and arsenite (As(III)) was conducted in a continuous fixed-bed column by using organic modified spent grains (OSGs). The column performances were evaluated by varying the influent flow rate (0.91, 1.36, and 2.72 ml/min) and arsenic ions initial concentration (1.0, 2.0, and 6.0 mg/l for As(V); 0.5, 1.0, and 3.0 mg/l for As(III)) in order to obtain experimental breakthrough curves. The maximum adsorption capacity was at 6.0 mg/l for As(V) and 3.0 mg/l for As(III) influent concentration and 1.36 ml/min flow rate. The Thomas model, Adams-Bohart model, and Yoon-Nelson kinetic models were used to analyze column performance. The value of rate constant for Thomas and Adams-Bohart models decreased with increase of influent concentration, but increased with increasing flow rate. The rate constant for the Yoon-Nelson model decreased with increases in both initial influent arsenic ions concentration and flow rate.

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mentioning

confidence: 99%

Continuous Fixed-Bed Column Study and Adsorption Modeling: Removal of Arsenate and Arsenite in Aqueous Solution by Organic Modified Spent Grains

Chen¹,

Wu²,

Chen³

et al. 2017

Pol. J. Environ. Stud.

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“…9d, f that most of the active sites of SD/MnFe 2 O 4 composite were shielded owing to the formation of biofilm on it. The bacterial mass partially occupies the void spaces of the biosorbent surface, so formation of biolayer on the surface of biosorbent decreases its surface porosity [72]. It can be observed from Fig.…”

Section: Ft-ir Analysismentioning

confidence: 84%

“…arsenicus MTCC 4380 was cultivated in a 250-mL flask containing 100 mL of the growth media with As(III) and As(V). The cultures were acclimatized to As(III) and As(V) individually exposing the culture in a series of shake flasks [14].…”

Section: Acclimatizationmentioning

confidence: 99%

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Biosorptive Performance of Bacillus arsenicus MTCC 4380 Biofilm Supported on Sawdust/MnFe2O4 Composite for the Removal of As(III) and As(V)

Podder

Majumder

2016

Water Conserv Sci Eng

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One of the main environmental concerns of today is the occurrence of arsenic in wastewater. Targeting a solution for this problem, several efforts have been made towards research and application of cost-effective and effortlessly adaptable processes. The ability of a biofilm of Bacillus arsenicus MTCC 4380 supported on sawdust/MnFe 2 O 4 composite to biosorb/ bioaccumulate As(III) and As(V) was investigated in batch experiments. Optimum biosorption/bioaccumulation conditions were determined as a function of contact time and temperature. The equilibrium was achieved after about 220 min at 30°C temperature. Nonlinear regression analysis was done to determine the best-fit kinetic model based on three correlation coefficients and three error functions and also to predict the parameters involved in kinetic models. The results showed that both Brouers-Weron-Sotolongo and Avrami models for both As(III) and As(V) were capable of providing realistic explanation of biosorption/bioaccumulation kinetic. Applicability of mechanistic models showed that the rate controlling step in the biosorption/bioaccumulation of both As(III) and As(V) was film diffusion rather than intraparticle diffusion. The estimated thermodynamic parameters ΔG 0 , ΔH 0 , and ΔS 0 revealed that biosorption/bioaccumulation of both As(III) and As(V) was feasible, spontaneous, and exothermic under examined conditions. The activation energy (E a ) estimated from Arrhenius equation specified the nature of biosorption/bioaccumulation being ion exchange type. The effect of co-existing ions such as Cu 2+ , Zn 2+ , Bi 3+ , Cd 2+ , Fe 3+ , Pb 2+ , Co 2+ , Ni 2+ , Cr 6+ , and SO 4 2− at different concentrations was inspected.

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“…Microbes employ a wide range of strategy for arsenic resistance and remediation [10]. Arsenate reductases from bacteria are heterodimeric proteins either located at the periplasm or are membrane associated [11]. Although all the arsenic bacteria can survive in arsenic atmosphere, the bacteria type which reduces As(V) to As(III) and accumulate As(III) is specifically termed as arsenic resistant bacteria.…”

Section: Introductionmentioning

confidence: 99%

Development of Nano Mullite Based Mesoporous Silica Biocer With Incorporated Bacteria for Arsenic Remediation

Kar¹,

Nandy²,

Basu³

et al. 2016

Ceramics - Silikaty

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Treatment of arsenic contaminated water in a batch reactor by using Ralstonia eutropha MTCC 2487 and granular activated carbon

Cited by 89 publications

References 42 publications

Continuous Fixed-Bed Column Study and Adsorption Modeling: Removal of Arsenate and Arsenite in Aqueous Solution by Organic Modified Spent Grains

Continuous Fixed-Bed Column Study and Adsorption Modeling: Removal of Arsenate and Arsenite in Aqueous Solution by Organic Modified Spent Grains

Biosorptive Performance of Bacillus arsenicus MTCC 4380 Biofilm Supported on Sawdust/MnFe2O4 Composite for the Removal of As(III) and As(V)

Development of Nano Mullite Based Mesoporous Silica Biocer With Incorporated Bacteria for Arsenic Remediation

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