Enhanced chromium(VI) removal using banana peel dust: isotherms, kinetics and thermodynamics study

Mondal, N. K.; Samanta, Angela; Chakraborty, Sukalyan; Shaikh, Wasim Akram

doi:10.1007/s40899-017-0130-7

Cited by 46 publications

(22 citation statements)

References 19 publications

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“…In chemisorption (chemical adsorption), the Chromium sticks to the adsorbent surface by forming a chemical bond (usually covalent) and tend to find sites that maximize their coordination number with the surface (44). These results agree with most of the previous studies on adsorbents like, (6), (20), (18), (19), (31), (9) and (22).…”

Section: Pseudo-second-order Kinetic Modelsupporting

confidence: 93%

“…The values of qe and k at different initial concentrations are calculated from the slope and intercept of the plots of log (qe -qt) versus t (18). The Pseudo-second-order chemisorption kinetic rate equation is also expressed as:…”

Section: Adsorption Kineticsmentioning

confidence: 99%

“…Langmuir equation is based on the assumptions that maximum adsorption occurs on a saturated mono-layer of adsorbate molecules on the adsorbent surface that the energy of adsorption is constant and that there is no transmigration of adsorbate in the plane of the surface (18). The linearized form is:…”

Section: Langmuir Isotherm Modelmentioning

confidence: 99%

“…(17) used 0.1 N NaOH and 0.5 N NaOH as a chemical preparation for Banana Waste (BW) to increase its adsorption capacity. Although the pH is an important parameter; its effect and optimum value is a controversial topic, (18) reported that optimum removal achieved at pH of 1, while (19) and (20) found that optimum pH was at pH 3. On the other hand; (21) concluded that the optimum pH was 7.…”

Section: Introductionmentioning

confidence: 99%

“…Different adsorbent dosage ranges were used to find the effect of dosage on Cr (VI) removal. The optimum dosage was 0.4, 4 and 20 gm/L according to (18), (19) and (20). The initial concentration was studied also in a range of 1 to 70 mg/L by (18), (21) and (20) while (19) studied the effect of initial concentration at 100 to 600 mg/L.…”

Section: Introductionmentioning

confidence: 99%

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Adsorption of High Chromium Concentrations from Industrial Wastewater Using Different Agricultural Residuals

A¹,

Hendy²,

M³

et al. 2020

J. Environ. Treat. Tech.

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Hexavalent chromium Cr (VI) is a toxic material used in many industries such as tanneries and electroplating industries. Most of the previous researches studied the removal of chromium at lower concentrations up to 600 mg/L but did not tackle the behavior at higher concentrations, which resemble the real concentration of studied tanneries effluents. The present research is a comparative study of different agricultural low cost adsorbents in the removal of high Chromium concentration from industrial wastewater up to 1000 mg/L, compared to a commercial activated carbon. The tested adsorbents are (Banana Waste (BW), Sawdust (SD), Phragmites Australis (PA), Sugarcane Bagasse (SCB), Pea pod peels (PPP) and Rice straw (RS)). The materials were chemically pretreated with acid-alkali except BW was treated with acid only, to improve adsorbent metal binding capacity. Batch experiments were conducted to study the effect of pH, adsorbent dosage, contact time, initial Chromium concentration and temperature on the removal efficiency of Chromium from wastewater. The experiments were conducted in two sets, one for lower concentration (25-50-100-200-400) mg/L and the other for higher concentration (600-800-1000) to simulate the concentration of Chromium in tannery industry effluents. At 1000 mg/L initial concentration, BW achieved the optimum removal efficiency of 73.28% at pH = 3, adsorbent dosage = 25 g/L and contact time of 3 hours with the adsorption capacity was 39 mg/g. For SD at pH=2, 3 hours contact time, 10 g/L dosage, and 30oC the removal ratio was 64.83% and the adsorption capacity was 86.30 mg/g. The equilibrium data for various agricultural adsorbents was being tested with various adsorption isotherm models such as Langmuir, Freundlich and Tempkin. At low concentrations, AC, BW, PA and SCB follows Freundlich isotherm model while SD follows Langmuir isotherm model. At higher concentrations, BW, SD, PA follows Langmuir isotherm while SCB follows Tempkin isotherm model. To evaluate the mechanism of Cr adsorption on different adsorbents, Pseudo-first-order and Pseudo-second-order equations were used. The adsorption process follows Pseudo-second-order for all adsorbents, which confirms the chemisorption of Cr (VI) on different adsorbents.

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Section: Pseudo-second-order Kinetic Modelsupporting

confidence: 93%

Section: Adsorption Kineticsmentioning

confidence: 99%

Section: Langmuir Isotherm Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Adsorption of High Chromium Concentrations from Industrial Wastewater Using Different Agricultural Residuals

A¹,

Hendy²,

M³

et al. 2020

J. Environ. Treat. Tech.

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Methodologies of Removal of Heavy Metals from Contaminated Water Using Various Waste Materials: A Comprehensive Review

Jamkar,

Tripathy,

Mallik

et al. 2023

ChemBioEng Reviews

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The contamination of water with heavy metals like arsenic, cadmium, nickel, zinc, lead, and cobalt presents a pressing and formidable challenge for numerous countries. The surge in industrial activities has exacerbated the pollution of freshwater sources, resulting in an alarming escalation of toxic metal concentrations in lakes, rivers, and underground water reservoirs. Consequently, millions of individuals in developing nations face significant health risks associated with heavy metal exposure. Compounding this issue is the limited accessibility to advanced water treatment methods, intensifying the gravity of the situation. Extensive research efforts have been dedicated to investigating low‐cost adsorbents derived from waste materials. It has been observed that the complete removal of heavy metals can be obtained using waste materials like eggshells, neem leaves, red mud, and black tea waste. The objective is to enhance the efficacy of heavy metal removal from water by employing modified waste materials as effective adsorbents. In this comprehensive review, concise and in‐depth information about the utilization of readily available waste materials is provided, including black tea waste, fruit peels, vegetable peels, sawdust, and other similar resources. This review emphasizes the kinetics and mechanisms involved in removing heavy metals. Additionally, the factors that impact the efficiency and extent of heavy metal removal in different waste materials have also been discussed.

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Biomass Based Materials for Green Route Production of Energy

Tiwari

Nirupama

Mishra

et al. 2022

Green Nano Solution for Bioenergy Production Enhancement

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Enhanced chromium(VI) removal using banana peel dust: isotherms, kinetics and thermodynamics study

Cited by 46 publications

References 19 publications

Adsorption of High Chromium Concentrations from Industrial Wastewater Using Different Agricultural Residuals

Adsorption of High Chromium Concentrations from Industrial Wastewater Using Different Agricultural Residuals

Methodologies of Removal of Heavy Metals from Contaminated Water Using Various Waste Materials: A Comprehensive Review

Biomass Based Materials for Green Route Production of Energy

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