Adsorption of Cr (VI) ion from tannery wastewater on tea waste: Kinetics, equilibrium and thermodynamics studies

Nigam, Mohit; Rajoriya, Sunil; Singh, Surendra Prasad; Kumar, Pradeep

doi:10.1016/j.jece.2019.103188

Cited by 102 publications

(24 citation statements)

References 46 publications

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“…The maximum adsorption capacity was 17.6 mg/g achieved by using BW compared to 21 mg/g for AC at 2 g/L dosage. Similar trend was reported by (4), (6) and (45).…”

Section: Effect Of Adsorbent Dosage On Cr Adsorptionsupporting

confidence: 91%

“…Hence, the equilibrium time obtained is 3 hours for the Cr adsorption on all adsorbents except for PPP and RS as they gave unsatisfying results so they we refused in further experiments for higher concentrations. These results agree with the trends of (31), (45), (46) and (47) . The optimum Chromium removal percentage obtained at 3 hours equilibrium time was for BW with 80.91% at pH = 3 and 10 g/L dosage followed by 73.79% for SD at the same conditions.…”

Section: Effect Of Contact Time On Cr Adsorptionsupporting

confidence: 91%

“…Banana waste achieved the optimum removal efficiency of about 84% at Chromium initial concentration of 25 mg/L followed by sawdust with removal efficiency of about 76% then by Phragmites Australis and sugarcane bagasse with removal efficiency of 48%. These results match the trend of (6), (2), (34), (4), (48) and (45). At the highest concentration of 200 mg/L, BW registered the optimum removal efficiency of 60.2%.…”

Section: Effect Of Initial Concentration On Cr Adsorptionsupporting

confidence: 86%

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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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“…The maximum adsorption capacity was 17.6 mg/g achieved by using BW compared to 21 mg/g for AC at 2 g/L dosage. Similar trend was reported by (4), (6) and (45).…”

Section: Effect Of Adsorbent Dosage On Cr Adsorptionsupporting

confidence: 91%

Section: Effect Of Contact Time On Cr Adsorptionsupporting

confidence: 91%

Section: Effect Of Initial Concentration On Cr Adsorptionsupporting

confidence: 86%

See 1 more Smart Citation

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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show abstract

“…188 Some adsorbents recently reported in the literature are waste materials which are regarded as low-cost sorbents. Typical examples include eggshell powder, 189 orange peels, 190 coffee ground and mixed waste tea, [191][192][193] human hair waste 194 as well as rock wool. 4 The application of these adsorbents in water purication is advantageous in green chemistry perspectives as these are prevented from invading the environment.…”

Section: Most Recent Applications Challenges and Future Perspectivesmentioning

confidence: 99%

Recent advances in hexavalent chromium removal from aqueous solutions by adsorptive methods

2019

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“…The use of biomass from agricultural residues as adsorbents has been widely researched, due to the low cost, immediate availability and high removal efficiency. Various bio-adsorbents such as plantain peels [6], [13], cassava shells [14], orange peels [15], rice husk [5], cocoa peels [16], tea waste [17], potato husks [1], lemon [18], coffee pulp [19], and other husks were tested for the removal of these contaminants [20], [21]. Therefore, in the present study, the adsorption kinetics of Cr (VI) in aqueous media were investigated using plantain peels, at different temperature conditions ( • C), adsorbent dose (g) and particle size.…”

Section: Introductionmentioning

confidence: 99%

Determination of Kinetic Parameters in the Biosorption of Chromium (VI) in Aqueous Solution

Tovar

Ortega-Toro

2020

ing.cienc

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he contamination of aquatic bodies by heavy metals is a growing environmental problem, making more critical the study and development of new technologies and materials that can be used for the removal of this type of pollutants. Thus, adsorption arises using residual materials as a sustainable alternative for the solution to this problem. In the present study, the use of plantain peels in the adsorption of Cr (VI) in a batch system is proposed, establishing the kinetics of the process at different temperature conditions, particle size and amount of adsorbent. The fit of the data was done using the theoretical models of pseudo-first-order, pseudo-second-order and Elovich. From the data, it is established that the pseudo-second-order and Elovich models show a better adjustment, so that the adsorption in the material occurs on two adsorption sites and that such process is related to chemical adsorption. The maximum adsorption capacity of Cr (VI) was found at a condition of 0.0306 g, 0.6775 mm and 55°C at a time of 420 min establishing the efficient use of plantain peels for the removal of the ion metallic in the studio.

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Adsorption of Cr (VI) ion from tannery wastewater on tea waste: Kinetics, equilibrium and thermodynamics studies

Cited by 102 publications

References 46 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

Recent advances in hexavalent chromium removal from aqueous solutions by adsorptive methods

Determination of Kinetic Parameters in the Biosorption of Chromium (VI) in Aqueous Solution

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