Response surface methodological approach for optimizing removal of Cr (VI) from aqueous solution using immobilized cyanobacterium

Kiran, Boggavarapu; Kaushik, Anubha; Kaushik, C. P.

doi:10.1016/j.cej.2006.09.002

Cited by 142 publications

(56 citation statements)

References 21 publications

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“…Response surface methodology (RSM) is a useful statistical and mathematical technique for estimation linear, inter-action, and quadratic effects of possible influencing factors with a limited number of experiments [19,20]. RSM has been applied to design experiments, model, and optimize several processes including adsorption [21], Fenton's oxidation [22], biosorption [23][24][25], photocatalytic degradation processes [26][27][28], and speciation [29]. Ölmez [30] has optimized and modeled the reduction of Cr(VI) by the electrocoagulation process.…”

Section: Introductionmentioning

confidence: 99%

Cr(VI) Immobilization Process in a Cr‐Spiked Soil by Zerovalent Iron Nanoparticles: Optimization Using Response Surface Methodology

Alidokht

Khataee

Reyhanitabar

et al. 2011

CLEAN Soil Air Water

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The response surface methodology involving the five-level central composite design (CCD) was employed to model and optimize the Cr(VI) immobilization process in a Cr-spiked soil using starch-stabilized zerovalent iron nanoparticles (ZVIn). ZVIn were synthesized via a borohydride reduction method and characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). All Cr(VI) immobilization experiments were conducted in a batch system. The variables for the CCD optimization were the ZVIn dosage (% w/w), reaction time (min), and initial Cr(VI) concentration in soil (mg/kg). The predicted response values by the second-order polynomial model were found to be in good agreement with experimental values (R 2 ¼ 0.968 and adj-R 2 ¼ 0.940). The optimization result showed that the Cr(VI) immobilization efficiency presented the maximal result (90.63%) at the following optimal conditions: ZVIn dosage of 1.5% w/w, reaction time of 60 min, and an initial Cr(VI) concentration of 400 mg/kg.

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Section: Introductionmentioning

confidence: 99%

Cr(VI) Immobilization Process in a Cr‐Spiked Soil by Zerovalent Iron Nanoparticles: Optimization Using Response Surface Methodology

Alidokht

Khataee

Reyhanitabar

et al. 2011

CLEAN Soil Air Water

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“…Removal of pollutants such as lead from wastewater has conventionally been accomplished through a range of chemical and physical processes (Kiran et al, 2007;Cesur and Baklaya, 2007). There are traditional methods of industrial wastewater treatment, such as precipitation, adsorption and coagulation methods.…”

Section: Introductionmentioning

confidence: 99%

Removal of lead from aqueous solution using waste tire rubber ash as an adsorbent

Mousavi

Hosseynifar

Jahed

et al. 2010

Braz. J. Chem. Eng.

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-The purpose of this study was to investigate the possibility of the utilization of waste tire rubber ash (WTRA) as a low cost adsorbent for removal of lead (II) ion from aqueous solution. The effect of different parameters (such as contact time, sorbate concentration, adsorbent dosage, pH of the medium and temperature) were investigated. The sorption process was relatively fast and equilibrium was reached after about 90 min of contact. The experimental data were analyzed by the Freundlich isotherm and the Langmuir isotherm. Equilibrium data fitted well with the Langmuir model with maximum adsorption capacity of 22.35 mg/g. The adsorption kinetics was investigated and the best fit was achieved by a first-order equation. The results of the removal process show that the Pb (II) ion adsorption on WTRA is an endothermic and spontaneous process. The procedure developed was successfully applied for the removal of lead ions in aqueous solutions.

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“…Lyngbea putealis Chromium (VI) 82% biosorption of chromium at pH 2-3 and 45°C at initial chromium concentration of 50-60 mg/l of solution [98] Sargassum fluitans Uranium Uranium sorption capacity observed was 560 mg/g, 330 mg/g and 150 mg/g at pH 4.0, 3.2 and 2.6 respectively.…”

Section: Metal Sorbed Results Referencementioning

confidence: 98%

Physical, Chemical and Phytoremediation Technique for Removal of Heavy Metals

Sharma¹,

Rana²

2016

J Heavy Met Toxicity Dis

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Mankind has been using plants and natural products since time immemorial for fighting the menace of heavy metal toxicity both in humans as well as in environment surrounding them. Nearly thirty five metals have been reported to cause occupational or accidental exposure to humans. Amongst these, twenty three are heavy metals. The increasing use of such heavy metals including radionuclides constitutes deleterious health issues. Presence of heavy metals in environment and their subsequent effects on humans down the food chain creates potential health hazard. Therefore removal of heavy metal has been a subject of paramount importance. Results of an exhaustive literature survey of natural and plant based compounds against heavy metal pollution including patents, books and scientific data from globally accepted scientific databases and search engines (Pubmed, Scopus and Web of Science, Sci Finder and Google Scholar), is systematically reviewed. It is conceived that a number of phytochemical agents as well microorganism can act as heavy metal removing agent both from human beings and the environment surrounding. Microbes which are used for the removal of heavy metals from the water bodies include bacteria, fungi, algae and yeast. Some important antioxidants such as flavonoids, pectin and phytic acid are also used for the elimination of the heavy metals from the human body. The present article is an extensive review that will offer a number of strategies and possible mechanisms for the heavy metals removal both from environment as well as from human body.

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Response surface methodological approach for optimizing removal of Cr (VI) from aqueous solution using immobilized cyanobacterium

Cited by 142 publications

References 21 publications

Cr(VI) Immobilization Process in a Cr‐Spiked Soil by Zerovalent Iron Nanoparticles: Optimization Using Response Surface Methodology

Cr(VI) Immobilization Process in a Cr‐Spiked Soil by Zerovalent Iron Nanoparticles: Optimization Using Response Surface Methodology

Removal of lead from aqueous solution using waste tire rubber ash as an adsorbent

Physical, Chemical and Phytoremediation Technique for Removal of Heavy Metals

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