An evaluation of chromium and zinc biosorption by a sea weed (Sargassum sp.) under optimized conditions

Saravanan, A.; Brindha, V.; Manimekalai, R.; Krishnan, Soundarajan

doi:10.17485/ijst/2009/v2i1.11

Cited by 10 publications

(5 citation statements)

References 9 publications

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“…Biosorption is a process in which solids of natural origin are employed for binding of heavy metals. It is the physico -chemical binding of metal species in biomass [9]. More specially, the metal binding in biosorption may be due to a combination of several sequestering mechanisms such as complexing, co-ordination, chelation, adsorption, ion exchange [10].…”

Section: Introductionmentioning

confidence: 99%

Removal of Zn (II) and Cu (II) Ions from Aqueous Solution by Dried Prosopis <i>JULIFLORA</i>

Habtegebrel¹

2018

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The use of cheap and ecofriendly adsorbents was been studied to find an alternative substitution of activated carbon for the removal heavy metals from wastewater. Prosopis juliflora is an invasive weed which posing a great environmental threat to other flora all over the world. In this study, the influence of physico-chemical key parameters such as the solution pH, the contact time, adsorbent dose, etc. The obtained experimental results have been fitted according to the two known adsorption models of Langmuir and Freundlich. The adsorption best fits the Langumir adsorption isotherm, which shows homogenous nature of adsorption. Prosopis juliflora can be a novel adsorbent according to results obtained in this study on the adsorbent dried prosofis juliflora. It is recommendable to use this weed as an adsorbent as it is obvious of solving two problems with one cure in the environment.

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Section: Introductionmentioning

confidence: 99%

Removal of Zn (II) and Cu (II) Ions from Aqueous Solution by Dried Prosopis <i>JULIFLORA</i>

Habtegebrel¹

2018

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“…these heavy metals spoil nerves, liver and bones, and also hinder functional group of essential enzymes [1,2]. Heavy metals are available in waste water including copper, chromium, zinc, lead, cadmium, mercury and so on, from various industries like dyes and pigments, metal cleaning and plating baths, paper and pulp, refineries, ceramic paints, tanning, wood preserving, catalysis chemical manufacturing, glass and so on, and in that from 5 to 220 mg/dm 3 of chromium(VI) is present which run out into environment. This released compound will eventually pollute water and soil [3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Higher adsorption capacity ofSpirulina platensisalga for Cr(VI) ions removal: parameter optimisation, equilibrium, kinetic and thermodynamic predictions

Gunasundari¹,

Kumar²

2016

IET nanobiotechnol.

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This study discusses about the biosorption of Cr(VI) ion from aqueous solution using ultrasonic assisted (UASP). The prepared UASP biosorbent was characterised by Fourier transform infrared spectroscopy, X-ray diffraction, Brunauer-Emmet-Teller, scanning electron spectroscopy and energy dispersive X-ray and thermogravimetric analyses. The optimum condition for the maximum removal of Cr(VI) ions for an initial concentration of 50 mg/l by UASP was measured as: adsorbent dose of 1 g/l, pH of 3.0, contact time of 30 min and temperature of 303 K. Adsorption isotherm, kinetics and thermodynamic parameters were calculated. Freundlich model provided the best results for the removal of Cr(VI) ions by UASP. The adsorption kinetics of Cr(VI) ions onto UASP showed that the pseudo-first-order model was well in line with the experimental data. In the thermodynamic study, the parameters like Gibb's free energy, enthalpy and entropy changes were evaluated. This result explains that the adsorption of Cr(VI) ions onto the UASP was exothermic and spontaneous in nature. Desorption of the biosorbent was done using different desorbing agents in which NaOH gave the best result. The prepared material showed higher affinity for the removal of Cr(VI) ions and this may be an alternative material to the existing commercial adsorbents.

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“…(5). Results in Table (2) shows the kinetic rate constants, correlation coefficient R 2 , and calculated equilibrium sorption capacity (Qe) of Ni(II) ions on CAC and PAC surfaces.…”

Section: Fig(3) Effect Of Contact Time On Adsorption Of Ni (Ii) Ion (Co =85mg/l)on Cac and Pac Surfaces Kinetic Study Of Adsorption (Ni 2mentioning

confidence: 99%

“…Heavy metals are well identified contaminants for public health, plants and animals because of its toxicity [1]. Toxic heavy metals a part from being hazardous for living organism, when exceed the specific limits, have accumulation characteristic in nature as they cannot be biodegraded, causing health problems in animals, plants and human beings [2,3]. Inorganic effluent from the industries contains toxic metals such as Ni, Cu, Zn and Cd...etc., which tend to accumulate in the food chain [4].…”

Section: Introductionmentioning

confidence: 99%

Purification of Aqueous Solution from Ni (II) Ions Using Commercial and Bitter Orange Leaves Activated Charcoal

Jarullah¹,

Alias²,

Hassan³

2017

JNUS

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The purification of diluted aqueous solution from toxic Ni (II) ion was investigated using commercial and bitter orange leaves activated charcoal as adsorbents through batch method. The contact times between the adsorbents and adsorbate at 298 K and pH of 5 were studied. The percentage metal removal approached equilibrium within 75 min on Commercial and 90 min on prepared charcoal surfaces. The experimental data of the metal removal equilibrium were correlated by either the Langmuir or Freundlich equations. Results indicate that the Langmuir model gave a better fit to the experimental data than the Freundlich equation. Kinetic processes of Ni 2+ adsorption on Commercial and prepared charcoal were described by applying pseudo-first-order and pseudosecond-order rate equations which that the adsorption process obey pseudo-second-order rate equation.

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An evaluation of chromium and zinc biosorption by a sea weed (Sargassum sp.) under optimized conditions

Cited by 10 publications

References 9 publications

Removal of Zn (II) and Cu (II) Ions from Aqueous Solution by Dried Prosopis <i>JULIFLORA</i>

Removal of Zn (II) and Cu (II) Ions from Aqueous Solution by Dried Prosopis <i>JULIFLORA</i>

Higher adsorption capacity ofSpirulina platensisalga for Cr(VI) ions removal: parameter optimisation, equilibrium, kinetic and thermodynamic predictions

Purification of Aqueous Solution from Ni (II) Ions Using Commercial and Bitter Orange Leaves Activated Charcoal

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An evaluation of chromium and zinc biosorption by a sea weed (Sargassum sp.) under optimized conditions

Cited by 10 publications

References 9 publications

Removal of Zn (II) and Cu (II) Ions from Aqueous Solution by Dried Prosopis &lt;i&gt;JULIFLORA&lt;/i&gt;

Removal of Zn (II) and Cu (II) Ions from Aqueous Solution by Dried Prosopis &lt;i&gt;JULIFLORA&lt;/i&gt;

Higher adsorption capacity ofSpirulina platensisalga for Cr(VI) ions removal: parameter optimisation, equilibrium, kinetic and thermodynamic predictions

Purification of Aqueous Solution from Ni (II) Ions Using Commercial and Bitter Orange Leaves Activated Charcoal

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Product

Resources

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Removal of Zn (II) and Cu (II) Ions from Aqueous Solution by Dried Prosopis <i>JULIFLORA</i>

Removal of Zn (II) and Cu (II) Ions from Aqueous Solution by Dried Prosopis <i>JULIFLORA</i>