Biosorption of nickel and total chromium from aqueous solution by gum kondagogu (Cochlospermum gossypium): A carbohydrate biopolymer

Vinod, V.T.P.; Sashidhar, R.B.; Sreedhar, B.

doi:10.1016/j.jhazmat.2010.02.016

Cited by 101 publications

(47 citation statements)

References 48 publications

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“…The procedures for the preparation of GK lyophilized powder was based on the earlier reported method used for other natural tree gums. 32 The gum solution was gently stirred overnight at room temperature. Later, undissolved matter was separated by keeping the gum solution at room temperature (25°C) for an additional 18 hours and filtered through a sintered glass funnel (#G-2 followed by #G-4).…”

Section: Gk Preparationmentioning

confidence: 99%

Green synthesis of copper oxide nanoparticles using gum karaya as a biotemplate and their antibacterial application

Padil¹,

Černík²

2013

IJN

220

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Background:Copper oxide (CuO) nanoparticles have attracted huge attention due to catalytic, electric, optical, photonic, textile, nanofluid, and antibacterial activity depending on the size, shape, and neighboring medium. In the present paper, we synthesized CuO nanoparticles using gum karaya, a natural nontoxic hydrocolloid, by green technology and explored its potential antibacterial application. Methods: The CuO nanoparticles were synthesized by a colloid-thermal synthesis process. The mixture contained various concentrations of CuCl 2 ⋅ 2H 2 O (1 mM, 2 mM, and 3 mM) and gum karaya (10 mg/mL) and was kept at 75°C at 250 rpm for 1 hour in an orbital shaker. The synthesized CuO was purified and dried to obtain different sizes of the CuO nanoparticles. The well diffusion method was used to study the antibacterial activity of the synthesized CuO nanoparticles. The zone of inhibition, minimum inhibitory concentration, and minimum bactericidal concentration were determined by the broth microdilution method recommended by the Clinical and Laboratory Standards Institute. Results: Scanning electron microscopy analysis showed CuO nanoparticles evenly distributed on the surface of the gum matrix. X-ray diffraction of the synthesized nanoparticles indicates the formation of single-phase CuO with a monoclinic structure. The Fourier transform infrared spectroscopy peak at 525 cm −1 should be a stretching of CuO, which matches up to the B 2u mode.The peaks at 525 cm −1 and 580 cm −1 indicated the formation of CuO nanostructure. Transmission electron microscope analyses revealed CuO nanoparticles of 4.8 ± 1.6 nm, 5.5 ± 2.5 nm, and 7.8 ± 2.3 nm sizes were synthesized with various concentrations of CuCl 2 ⋅ 2H 2 O (1 mM, 2 mM, and 3 mM). X-ray photoelectron spectroscopy profiles indicated that the O 1s and Cu 2p peak corresponding to the CuO nanoparticles were observed. The antibacterial activity of the synthesized nanoparticles was tested against Gram-negative and positive cultures. Conclusion:The formed CuO nanoparticles are small in size (4.8 ± 1.6 nm), highly stable, and have significant antibacterial action on both the Gram classes of bacteria compared to larger sizes of synthesized CuO (7.8 ± 2.3 nm) nanoparticles. The smaller size of the CuO nanoparticles (4.8 ± 1.6 nm) was found to be yielding a maximum zone of inhibition compared to the larger size of synthesized CuO nanoparticles (7.8 ± 2.3 nm). The results also indicate that increase in precursor concentration enhances an increase in particle size, as well as the morphology of synthesized CuO nanoparticles.

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Section: Gk Preparationmentioning

confidence: 99%

Green synthesis of copper oxide nanoparticles using gum karaya as a biotemplate and their antibacterial application

Padil¹,

Černík²

2013

IJN

220

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“…Ion exchange, chemical precipitation, reverse osmosis, land filling and bioslurries are the conventional treatment methods used for heavy metal remediation present in water and soil (Vinod and Sashidhar 2011). In addition, these methods have some major drawbacks of being expensive owing to the requirement of sophisticated infrastructure, generate toxic sludge which affects the environment and might not completely remove the metals (Singh and Gadi 2012).…”

Section: Introductionmentioning

confidence: 99%

Adsorptive removal of lead and arsenic from aqueous solution using soya bean as a novel biosorbent: equilibrium isotherm and thermal stability studies

et al. 2018

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In this study, adsorption potential of soya bean adsorbent for lead (Pb) and arsenic (As) has been assessed in order to consider its suitability for purification of wastewater containing heavy metals. The main focus of study was on Pb and As. Batch experiments were performed to study the adsorption of Pb and As on soya bean absorbent. The effect of various experimental parameters (adsorbent dose, contact time, temperature and pH) was studied, and optimal conditions were determined. The effect of adsorbent dose on the biosorption of Pb and As from aqueous solution was studied at 37 °C by varying the adsorbent amount from 1 g/100 ml to 4 g/100 ml. Highest amount of Pb and As was adsorbed at sorbent amount of 3 g/100 ml. The optimum pH for removal of As and Pb was found to be 2.0 and 4.0 ± 0.26. Maximum biosorption of Pb and As was achieved at 37 °C. The maximum percentage removal of Pb and As was attained at 60 min of shaking time. Langmuir and Freundlich isotherm models were utilized for equilibrium studies. It was found that biosorption by soya bean adsorbent was exothermic in nature. The thermal degradation analysis suggested that the degradation occurs in two steps and adsorbent is thermally stable.Keywords Biosorption · Soya bean adsorbent · Lead and arsenic · Sorption isotherm and thermal analysis of biosorbent

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“…Classical techniques of heavy metal removal from solutions include the following processes: precipitation, electrolytic methods, ion exchange, evaporation, and adsorption (Alyuz and Veli 2009). These techniques are economically expensive and have disadvantages such as incomplete metal removal, generation of toxic sludge, and other disposable waste products (Vinoda et al 2010). This may be due to the high cost and lack of eco-friendliness of the technological processes.…”

Section: Introductionmentioning

confidence: 99%

Characterization of activated Acacia nilotica seed pods for adsorption of Nickel from aqueous solution

Thenmozhi¹,

Santhi

2014

Int. J. Environ. Sci. Technol.

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The use of low-cost adsorbent has been investigated in the removal of nickel ions from aqueous solution. The adsorption of nickel is strongly dependent on various parameters such as pH, dosage, contact time and initial concentration of metal. The optimum pH for nickel removal is found to be 7.0. The removal of nickel ions increases with time and attains saturation in about 60-120 min. The experimental data were analyzed with various isotherms such as Freundlich, Langmuir Temkin and Dubinin-Radushkevich adsorption isotherm. The experimental data were fitted into the following kinetic models: Lagergren pseudo-first order, the chemisorption pseudo-second order, Elovich kinetic model, and the intraparticle diffusion model. It was observed that chemisorption pseudo-second-order kinetic model described the sorption process with high coefficients of determination better than any other kinetic models. The results indicate that the second-order model best describes adsorption kinetic data. The adsorbent was characterized; functional group was analyzed by Fourier transform infrared spectroscopy and surface morphology by scanning electron microscope, and energy dispersive X-ray diffraction were analysed.

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Biosorption of nickel and total chromium from aqueous solution by gum kondagogu (Cochlospermum gossypium): A carbohydrate biopolymer

Cited by 101 publications

References 48 publications

Green synthesis of copper oxide nanoparticles using gum karaya as a biotemplate and their antibacterial application

Green synthesis of copper oxide nanoparticles using gum karaya as a biotemplate and their antibacterial application

Adsorptive removal of lead and arsenic from aqueous solution using soya bean as a novel biosorbent: equilibrium isotherm and thermal stability studies

Characterization of activated Acacia nilotica seed pods for adsorption of Nickel from aqueous solution

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