Removal of methylene blue by invasive marine seaweed: Caulerpa racemosa var. cylindracea

Cengiz, Sevilay; Çavaş, Levent

doi:10.1016/j.biortech.2007.05.011

Cited by 180 publications

(69 citation statements)

References 23 publications

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“…However, the slower phase may involve other mechanisms such as saturation of binding sites and complexity or microprecipitation (Gupta and Rastogi, 2009). The results suggest that there is high affinity and a strong electrostatic force of attraction between the functional groups on the surface wall of algae and the MG dye (Cengiz and Cavas, 2008).…”

Section: Discussionmentioning

confidence: 92%

Bioremoval of toxic dye by using different marine macroalgae

Omar¹,

El-Gendy²,

Al-Ahmary³

2018

Turk J Bot

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The removal of malachite green dye from aqueous solution by Ulva lactuca, Sargassum crassifolium, and Gracilaria corticata has been demonstrated in order to examine their potential use as low-cost adsorbents. The optimum pH (8.0), temperature (25 °C), contact time (150 min), and biomass (2.0 g) for removal of dye by algae are reported. The maximum removal percentage of the dye ranged between 95.6% and 98.3% by using Sargassum crassifolium at the optimal conditions. Minimum removal of dye by algae (69%-77.1%) was observed with the high dye concentration of 35 mg L -1 at the optimal conditions. Adsorption of the dye by using the biomass was found to fit well with Langmuir and Freundlich isotherms. The adsorption reaction was spontaneous, exothermic, and highly favorable by the tested algae. The FT-IR analyses confirmed that hydroxyl, carboxyl, amino, and carbonyl groups were responsible for the dye binding process. Scanning electron microscopy showed great porosity on the algal surface, which allows the free passage of dye molecules. The biomass of brown algae was the most effective in the removal of malachite green, followed by green and red algae. The highest affinity of the brown biomass for dye removal may be due to its high binding site affinity, the negative free energy of adsorption, and the great pores on its surface.

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Section: Discussionmentioning

confidence: 92%

Bioremoval of toxic dye by using different marine macroalgae

Omar¹,

El-Gendy²,

Al-Ahmary³

2018

Turk J Bot

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“…[45] Fly ash treated with HNO3 7.10 30 [46] Caulerpa racemosa var. 3.40 27 [47] cylindracea Banana peel 20.80 30 [30] Orange peel 18.60 30 [30] Neem (Azadirachta indica) 8.76 27 [10] leaf powder Sulphuric acid treated 39.68 26 [48] Parthenium (SWC) Natural tripoli 16.62 25 This study Figure 6 shows the variation of separation factor (R L ) with initial MB concentration. The results that the R L values were in the range of 0-1 indicate that the sorption of MB onto tripoli is favorable.…”

Section: Adsorption Isothermsmentioning

confidence: 91%

Antimicrobial Activity of Some Medicinal Plants from Malaysia

Philip¹,

Malek²,

Sani³

et al. 2009

American J. of Applied Sciences

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Problem statement: It is well documented that lead is one of contaminants of industrial wastewaters and its pollution exists in the wastewater of many industries. As a result, recent research has focused on the development of cost effective alternatives using various natural sources and industrial wastes. In this setting, the use of low-cost agricultural materials, waste and residues for recovering heavy metals from contaminated industrial effluent has emerged as a potential alternative method to high cost adsorbents. In the present study, adsorption of lead(II) ions onto Orange Peel (OP), a typical agricultural byproduct, was investigated systematically with the variation in the parameters of pH, sorbent dosage, contact time and the initial concentration of adsorbate. Langmuir and Freundlich isotherms were used to analyze the equilibrium data. Kinetic and thermodynamic parameters were also calculated to describe the adsorption mechanism. Approach: The Orange Peel (OP) was obtained from a local market in the south of Jordan. The orange peel was cut into small pieces using scissors. Then OP was dried at 100°C for 24 h using hot air oven. Qualitative analyses of the main functional groups involved in metal adsorption were performed using a Fourier transformed infrared spectrometer (Perkin-Elmer FTIR 1605, ¨Uberlingen, Germany). Biosorption experiments were carried out in a thermostatic shaker at 180 rpm and at an ambient temperature (20±2°C) using 250 mL shaking flasks containing 100 mL of different concentrations and initial pH values of Pb(II) solutions, prepared from reagent grade salt Pb(NO 3 ) 2 (Merck). The initial pH values of the solutions were previously adjusted with 0.1 M HNO 3 or NaOH and measured using a hand held pH meters (315i/SET). The sorbent (0.2-1.0 g) was added to each flask and then the flasks were sealed up to prevent change of volume of the solution during the experiments. After shaking the flasks for predetermined time intervals, the samples were withdrawn from the flasks and filtered through a Whatman filter paper. The filtrate was analyzed by AAS (Perkin Elmer Analyst 300). Results: Four kinetic models are the pseudo-first-order, pseudo-second-order, Elovich and intraparticle diffusion equations, were selected to interpret the adsorption data. Kinetic parameters such as the rate constants, equilibrium adsorption capacities and related correlation coefficients, for each kinetic model were calculated and discussed. The linear Langmuir and Freundlich models were applied to describe equilibrium isotherms and both models fitted well. The monolayer adsorption capacity was found as 21.1 mg g −1 at pH 6 and 20°C.The dimensionless separation factor (R L ) has shown that orange peel can be used for removal of Pb(II) from aqueous solutions. The nagative free energy of adsorption indicated that the adsorption of lead (II) ions onto orange peel was feasible and spontaneous. Conclusion: The sorption capacity of the orange peel is comparable to the other available adsorbents and it is quite c...

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“…On inhaling, symptoms such as difficulties in breathing, vomiting, dermatitis, diarrhea and cancer can occur for human beings (Bilal, 2004;Dursun et al, 2007;Cengiz and Cavas, 2008;Al-Qodah et al, 2007;Namasivayam and kavitha, 2002). By design, these dyes are highly stable molecules, made to resist degradation by light, chemical, biological and other exposures (EI-Qada et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Application of biowaste (waste generated in biodiesel plant) as an adsorbent for the removal of hazardous bye - methylene blue - from aqueous phase

Gottipati

Mishra

2010

Braz. J. Chem. Eng.

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-Solid waste (SW) from a biodiesel plant has been successfully used for the removal of the hazardous cationic water soluble dye -methylene blue (MB) -from an aqueous phase. Batch adsorption studies were carried out by monitoring the pH, amount of adsorbent, initial dye concentration and contact time. Attempts have also been made to monitor the adsorption process through Langmuir, Freundlich, Temkin and D-R adsorption isotherm models. Relevant thermodynamic parameters were calculated and it was found that the adsorption process was exothermic and feasible at low temperatures. The nature and randomness of the adsorption process was determined by calculating the thermodynamic parameters such as Gibbs free energy (∆G o ), change in entropy (∆S o ) and heat of adsorption (∆H o ). The kinetics of the adsorption indicates that the process is pseudo-second-order and also reveals the involvement of bulk diffusion and intraparticle diffusion mechanisms.

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Removal of methylene blue by invasive marine seaweed: Caulerpa racemosa var. cylindracea

Cited by 180 publications

References 23 publications

Bioremoval of toxic dye by using different marine macroalgae

Bioremoval of toxic dye by using different marine macroalgae

Antimicrobial Activity of Some Medicinal Plants from Malaysia

Application of biowaste (waste generated in biodiesel plant) as an adsorbent for the removal of hazardous bye - methylene blue - from aqueous phase

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