Adsorption characteristics of methylene blue on poplar leaf in batch mode: Equilibrium, kinetics and thermodynamics

Han, Xiuli; Niu, Xiaofei; Ma, Xinbin

doi:10.1007/s11814-011-0211-5

Cited by 56 publications

(24 citation statements)

References 33 publications

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“…The presence of dyes can cause damage to living beings in water. In addition, the stability of most dye molecules under condition of light, heat and chemicals leads to the fact that the dying effluents are difficult to degrade [2]. Many treatment system have been used for the removal of synthetic dyes from aqueous solutions including ion exchange, membrane filtration, precipitation, photocatalytic degradation, oxidation, electrochemical and adsorption.…”

Section: Introductionmentioning

confidence: 99%

Equilibrium, Kinetics and Thermodynamic of Dye Adsorption by Low — Cost Adsorbents

Sawasdee¹,

Watcharabundit²

2015

IJCEA

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Abstract-This work is to study the adsorption of a commercial dye (magenta color) for silk yarn by low-cost adsorbents such as green perlite and shrimp shell (Macrobrachium rosenbergii). The adsorption experiments were carried out in batch process without adjusting pH. The various parameters, such as contact time, initial dye concentration and adsorbent doses were evaluated at the natural pH. The equilibrium data at various concentrations were analyzed using Langmuir, Freundlich and Temkin isotherms. The results showed that the maximum adsorption capacities of Langmuir isotherm valued 14.805 mg/g for green perlite and 5.621 mg/g for shrimp shell at 30º C. The kinetic data was better fitted with pseudosecond order for the adsorbents. Thermodynamic properties such as free energy (ΔG), enthalpy (ΔH) and entropy (ΔS) indicated spontaneous and endothermic in nature of adsorption for all adsorbents. The study revealed that green perlite and shrimp shell can be used as an efficient adsorbents for the removal of dye solution.

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Section: Introductionmentioning

confidence: 99%

Equilibrium, Kinetics and Thermodynamic of Dye Adsorption by Low — Cost Adsorbents

Sawasdee¹,

Watcharabundit²

2015

IJCEA

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“…The k p values were directly calculated from the second regression line, with correlation coefficients exceeding 0.96 as shown in Table 3. However, the linear plots failed to pass through the origin of co- ordinates, suggesting simultaneous film diffusion and intraparticle diffusion [21][22][23].…”

Section: Kinetic Parametersmentioning

confidence: 99%

Treatment of Wastewater Containing Crystal Violet Using Walnut Shell

Song¹,

Fang²,

Chen³

2016

JRST

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Crystal violet (CV) was removed from aqueous solutions using walnut shell (WS) as an adsorbent. The effect of initial ph, contact time, adsorbent level and temperature on CV adsorption, were studied in batch mode. The results indicated that both the Langmuir and the Freundlich equations effectively described the adsorption equilibrium. A pseudo second-order kinetics provided a perfect fit for the studies. Intraparticle diffusion was also used to investigate the kinetic mechanisms. intraparticle diffusion was a significant parameter in the regulation of adsorption. The thermodynamic parameters suggested a spontaneous endothermic reaction. The results suggest that WS is an inexpensive adsorbent for effective removal of CV.

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“…Furthermore, MG is used as the microbicide, fungicide, and parasiticide. MG has a negative influence on immune and reproductive systems, thus it is necessary to remove MG and MB from wastes [9,10].…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Methylene Blue and Malachite Green from Aqueous Solutions on Mesoporous Carbon-Nickel and Carbon-Zinc Composites

Jedynak¹

2017

Eng. Prot. Environ.

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Adsorpcja błękitu metylenowego i zieleni malachitowej z roztworów wodnych na mezoporowatych kompozytach węglowo-niklowych i węglowo-cynkowychIn this work adsorption of methylene blue and malachite green on mesoporous carbon-nickel and carbon-zinc composites (ST-A-Ni, ST-A-Ni(NO3)2-imp and ST-A-Zn, ST-A-Zn(NO3)2-imp) were investigated. These materials were obtained by the soft-templating method in presence of various precursors containing nickel or zinc. Nanoparticles of nickel or zinc and solutions of nickel nitrate(V) or zinc nitrate(V) were used as a source of nickel and zinc.Low-temperature nitrogen adsorption isotherms were determined for investigated materials and they were used for porous structure parameters calculation. . Participation of mesoporosity in the total porosity of carbon composites is from approx. 44% to approx. 78%. This means that studied carbons are in fact mesoporous materials, with considerable domination of mesoporosity over the microporosity. The exception is composite ST-A-Zn were the microporosity value is a little bit higher than mesoporosity. The mesopores dimension for the maximum of the distribution function (in the range of mesopores) was determined by Kruk-Jaroniec-Sayari (KJS) method. This dimension was approx. 7 nm for all investigated adsorbents.SEM photos confirmed the presence of ordered mesopores, particularly in materials obtained as a result of zinc nitrate impregnation. Also the presence of nickel nanoparticles, with different dimensions and shapes (ST-A-Ni), was confirmed by SEM photos.The concentrations of adsorbates, before and after adsorption, were determined by spectrophotometric method. Adsorption experiments were carried out at 25°C temperature. The adsorption equilibrium for investigated in this work mesoporous compositions (carbon--metal-composite -colorant solution) was settled after 90 minutes (ST-A-Ni(NO3)2-imp-MB and ST-A-Zn(NO3)2-imp-MB), after 120 minutes (ST-A-Ni-MB), after 240 minutes (ST-A-Ni-MG) and for the rest of investigated compositions after 360 minutes. The studies of adsorption process velocity showed that in most cases adsorption kinetics proceeded according to pseudo II-order reaction model. Only in one case according to pseudo I-order reaction model: for ST-A-Zn (malachite green). Obtained adsorption isotherms were substituted into the Langmuir equation and Freundlich equation. Adsorption process of methylene blue and malachite green on all studied carbon-metal composites proceed in accordance to adsorption model described by Langmuir equation. Adsorption ability of studied mesoporous carbon materials is significantly higher for methylene blue than for malachite green. The best adsorbent for methylene blue was carbon ST-A-Zn(NO3)2-imp (qm = 104.17 mg/g), the worst K. Jedynak 44 adsorbent was carbon ST-A-Zn (qm = 6.65 mg/g). In the case of malachite green the best adsorbent was carbon ST-A-Ni (qm = 58.82 mg/g) and the worst adsorbent was carbon ST-A-Zn (qm = 4.25 mg/g). On the basis of K constant from Langmuir equation the value of free ent...

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Adsorption characteristics of methylene blue on poplar leaf in batch mode: Equilibrium, kinetics and thermodynamics

Cited by 56 publications

References 33 publications

Equilibrium, Kinetics and Thermodynamic of Dye Adsorption by Low — Cost Adsorbents

Equilibrium, Kinetics and Thermodynamic of Dye Adsorption by Low — Cost Adsorbents

Treatment of Wastewater Containing Crystal Violet Using Walnut Shell

Adsorption of Methylene Blue and Malachite Green from Aqueous Solutions on Mesoporous Carbon-Nickel and Carbon-Zinc Composites

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