Removal of Congo Red from aqueous solution by cattail root

Hu, Zhenhu; Chen, Hui; Feng, Ji; Yuan, Shuai

doi:10.1016/j.jhazmat.2009.08.082

Cited by 242 publications

(101 citation statements)

References 40 publications

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“…ANOVA test revealed that the both contact time (p \ 0.001) and temperature (p \ 0.012) showed a significant effect on the dye removal. Similar results were reported in literature (Nasuha et al 2010;Hu et al 2010;Safa and Bhatti 2011), where the dye removal was found as a function of contact time and temperature. Higher rate of dye removal was observed during the initial phase of adsorption due to the availability Fig.…”

Section: Effect Of Contact Time and Temperaturesupporting

confidence: 91%

“…So the used CP can either be disposed into landfills or can be subjected to anaerobic digestion for biogas production (Hu et al 2007). Alternatively, it can be used as low-cost biosorbent by considering its highly porous structure to treat wastewater (Abdel-Ghani et al 2009;Hu et al 2010;Hegazy et al 2011). Eventhough untreated phytomass is constrained with lower biosorption capacity (Nasuha and Hameed 2011), yet, it is beneficial to avoid any recontamination of the environment.…”

Section: Introductionmentioning

confidence: 99%

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Biosorption of methylene blue from aqueous solutions by Typha angustata phytomass

Rehman

Han

2012

Int. J. Environ. Sci. Technol.

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The objective of this study was to investigate the biosorption of an azo dye (Methylene blue) by a wetland phytomass (Typha angustata) under post-phytoremediation scenario. Thus, the phytomass was used without any chemical modification. The batch adsorption experiments were conducted to evaluate the effects of contact time and temperatures (25-45°C) on the adsorption of methylene blue (MB) from aqueous solution by cattail phytomass (CP). More than 80 % of MB dye was removed from the aqueous solution within first 10 min of the experiment. Langmuir isotherm was modeled to describe the monolayer adsorption of MB dye (R 2 = 0.995) with the maximum adsorption capacity of 8.1 mg/g at 25°C. Pseudo-second-order kinetic model adequately described the kinetics of absorption process (R 2 = 0.999). The adsorption of MB on the cattail phytomass was a spontaneous and endothermic process that was governed by chemisorption. Hence, CP could be applied as a potential low cost biosorbent to treat dyeing wastewater.

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Section: Effect Of Contact Time and Temperaturesupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Biosorption of methylene blue from aqueous solutions by Typha angustata phytomass

Rehman

Han

2012

Int. J. Environ. Sci. Technol.

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“…Biosorption of methylene blue by water hyacinth roots was reported to be unaffected by pH in the range of 5-12 12 . Removal of Congo Red by cattail root powder was also found to be independent of pH 13 . This indicates there is such a strong interaction between the dye and TLR-PA that neither H + nor OHions could influence the adsorption capacity.…”

Section: Effect Of Ph On Adsorptionmentioning

confidence: 82%

Untitled

Nagda¹,

Ghole²

2011

ScienceAsia

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Meaningful waste use aimed at conservation of resources and lowering the amount of pollution is now inevitable. In the present study, the potential of tendu (Diospyros melanoxylon) leaf waste from a local beedi (cigarette) industry to remove dye from aqueous solution was studied after its pretreatment with phosphoric acid. The carbon prepared was characterized by analysis of porosity, surface area, scanning electron micrograph, cation exchange capacity, iodine, and methylene blue number. Feasibility of employing this carbon for the removal of Janus Green, a diazine dye, from aqueous solution was investigated. Dye removal was compared simultaneously with commercial carbon. The adsorption was evaluated in a batch process with different concentrations of dye as well as with different adsorbent doses, at a range of pH values, temperature, and contact time. The kinetic parameters were determined and found to follow the Lagergren pseudo first order model. The suitability of the adsorbent was tested by fitting the adsorption data with Langmuir and Freundlich isotherms. The Langmuir maximum adsorption capacity was found to be 51 mg/g, which approached the value 57 mg/g obtained for commercial carbon. The changes in standard free energy, standard entropy and standard enthalpy were calculated. The results showed that adsorption of dye onto phosphoric acid treated tendu biomass was spontaneous and found to be physical and exothermic in nature.

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“…The temperature presents a notable effect on the biosorption and the thermodynamic parameters such as change in the standard free energy (DG°), standard enthalpy (DH°), and standard entropy (DS°) are determined [74]:…”

Section: Thermodynamic Studiesmentioning

confidence: 99%

Biosorption of cationic dye from aqueous solutions onto lignocellulosic biomass (Luffa cylindrica): characterization, equilibrium, kinetic and thermodynamic studies

et al. 2016

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In the present study, biomass fiber (Luffa cylindrica) has been successfully used as biosorbent for the removal of a cationic dye namely, methylene blue, from aqueous solution using a batch process. The characterization of the biosorbent was carried out by the infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The chemical composition has been established by the energy dispersive X-Ray spectroscopy (EDS). The effects of various parameters such as the contact time (0-160 min), solution pH (2-10), biosorbent dose (0.5-8 g L -1 ), particle size, initial MB concentration (20-300 mg L -1 ) and temperature (20-60°C) were optimized. The biosorption isotherms were investigated by the Langmuir, Freundlich, Dubinin-Radushkevich and Tempkin models. The data were well fitted with the Langmuir model, with a maximum biosorption capacity of 49.46 mg g -1 at 20°C. The kinetics data were analyzed by the pseudo-first-order and pseudo-second-order models. The mass transfer model in terms of interlayer diffusion was applied to examine the mechanisms of the rate-controlling step (R 2 = 0.9992-0.9999). The thermodynamic parameters: free energy (DG°= -5.428 to -3.364 kJ mol -1 ), enthalpy (DH°= -20.547 kJ mol -1 ) and entropy (DS°= -0.052 kJ mol -1 K -1 ) were determined over the temperatures range (20-60°C). The results indicate that Luffa cylindrica could be an interesting biomass of alternative material with respect to more costly adsorbents used nowadays for dye removal.

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Removal of Congo Red from aqueous solution by cattail root

Cited by 242 publications

References 40 publications

Biosorption of methylene blue from aqueous solutions by Typha angustata phytomass

Biosorption of methylene blue from aqueous solutions by Typha angustata phytomass

Untitled

Biosorption of cationic dye from aqueous solutions onto lignocellulosic biomass (Luffa cylindrica): characterization, equilibrium, kinetic and thermodynamic studies

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