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Chromium(VI) sorption efficiency of acid-activated banana peel over organo-montmorillonite in aqueous solutions.
Int J Phytoremediation. 2017 Jul 03; 19(7):605-613.IJ

Abstract

In the present study, we examined sorption of chromate (Cr(VI)) to acid-activated banana peel (AABP) and organo-montmorillonite (O-mont) as a function of pH, initial Cr(VI) concentration at a sorbent dose of 4 g L-1 and at 20 ± 1°C in aqueous solutions. In sorption edge experiments, maximum Cr(VI) removal was obtained at pH 3 after 2 hours by AABP and O-mont (88% and 69%). Sorption isotherm data showed that the sorption capacity of AABP was higher than O-mont (15.1 vs. 6.67 mg g-1, respectively, at pH 4). Freundlich and Langmuir models provided the best fits to describe Cr(VI) sorption onto AABP (R2 = 0.97) and O-mont (R2 = 0.96). Fourier transform infrared spectroscopy elucidated that for AABP mainly the -OH, -COOH, -NH2, and for O-mont intercalated amines and -OH surface functional groups were involved in Cr(VI) sorption. The scanning electron microscopy combined with energy dispersive X-ray spectroscopy (SEM-EDX) analyses, although partly, indicate that the (wt. %) proportion of cations (e.g., Ca, Mg) in AABP decreased after Cr(VI) sorption. This may be due to ion exchange of chromite (Cr(III)) (produced from Cr(VI) reduction) with cationic elements in AABP. Also, Cr(VI) desorption (using phosphate solution) from AABP was lower (29%) than that from O-mont (51%) up to the third regeneration cycle. This bench scale comparative study highlights that the utilization of widely available and low-cost acid-activated biomaterials has a greater potential than organo-clays for Cr(VI) removal in aqueous media. However, future studies are warranted to precisely delineate different mechanisms of Cr(VI) sorption/reduction by acid-activated biomaterials and organo-clays.

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Authors+Show Affiliations

Ashraf A
a Institute of Soil and Environmental Sciences, University of Agriculture Faisalabad , Faisalabad , Pakistan.
Bibi I
a Institute of Soil and Environmental Sciences, University of Agriculture Faisalabad , Faisalabad , Pakistan. b MARUM and Department of Geosciences , University of Bremen , Bremen , Germany.
Niazi NK
a Institute of Soil and Environmental Sciences, University of Agriculture Faisalabad , Faisalabad , Pakistan. b MARUM and Department of Geosciences , University of Bremen , Bremen , Germany. c Southern Cross GeoScience , Southern Cross University , Lismore , NSW , Australia.
Ok YS
d Korea Biochar Research Center and Department of Biological Environment , Kangwon National University , Chuncheon , Korea.
Murtaza G
a Institute of Soil and Environmental Sciences, University of Agriculture Faisalabad , Faisalabad , Pakistan.
Shahid M
e Department of Environmental Sciences , COMSATS Institute of Information Technology , Vehari , Pakistan.
Kunhikrishnan A
f Chemical Safety Division , National Academy of Agricultural Science , Wanju , Korea.
Li D
g College of Resource and Environmental Science , Chongqing University , Chongqing , China.
Mahmood T
a Institute of Soil and Environmental Sciences, University of Agriculture Faisalabad , Faisalabad , Pakistan.

MeSH

AdsorptionBentoniteBiodegradation, EnvironmentalChromiumHydrogen-Ion ConcentrationKineticsMusaSolutionsWater Pollutants, Chemical

Pub Type(s)

Journal Article

Language

eng

PubMed ID

27849143

Citation

Ashraf, Anam, et al. "Chromium(VI) Sorption Efficiency of Acid-activated Banana Peel Over Organo-montmorillonite in Aqueous Solutions." International Journal of Phytoremediation, vol. 19, no. 7, 2017, pp. 605-613.
Ashraf A, Bibi I, Niazi NK, et al. Chromium(VI) sorption efficiency of acid-activated banana peel over organo-montmorillonite in aqueous solutions. Int J Phytoremediation. 2017;19(7):605-613.
Ashraf, A., Bibi, I., Niazi, N. K., Ok, Y. S., Murtaza, G., Shahid, M., Kunhikrishnan, A., Li, D., & Mahmood, T. (2017). Chromium(VI) sorption efficiency of acid-activated banana peel over organo-montmorillonite in aqueous solutions. International Journal of Phytoremediation, 19(7), 605-613. https://doi.org/10.1080/15226514.2016.1256372
Ashraf A, et al. Chromium(VI) Sorption Efficiency of Acid-activated Banana Peel Over Organo-montmorillonite in Aqueous Solutions. Int J Phytoremediation. 2017 Jul 3;19(7):605-613. PubMed PMID: 27849143.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Chromium(VI) sorption efficiency of acid-activated banana peel over organo-montmorillonite in aqueous solutions. AU - Ashraf,Anam, AU - Bibi,Irshad, AU - Niazi,Nabeel Khan, AU - Ok,Yong Sik, AU - Murtaza,Ghulam, AU - Shahid,Muhammad, AU - Kunhikrishnan,Anitha, AU - Li,Dongwei, AU - Mahmood,Tariq, PY - 2016/11/17/pubmed PY - 2018/1/27/medline PY - 2016/11/17/entrez KW - FTIR KW - biosorption KW - contaminated water KW - modeling KW - organo-clays KW - remediation SP - 605 EP - 613 JF - International journal of phytoremediation JO - Int J Phytoremediation VL - 19 IS - 7 N2 - In the present study, we examined sorption of chromate (Cr(VI)) to acid-activated banana peel (AABP) and organo-montmorillonite (O-mont) as a function of pH, initial Cr(VI) concentration at a sorbent dose of 4 g L-1 and at 20 ± 1°C in aqueous solutions. In sorption edge experiments, maximum Cr(VI) removal was obtained at pH 3 after 2 hours by AABP and O-mont (88% and 69%). Sorption isotherm data showed that the sorption capacity of AABP was higher than O-mont (15.1 vs. 6.67 mg g-1, respectively, at pH 4). Freundlich and Langmuir models provided the best fits to describe Cr(VI) sorption onto AABP (R2 = 0.97) and O-mont (R2 = 0.96). Fourier transform infrared spectroscopy elucidated that for AABP mainly the -OH, -COOH, -NH2, and for O-mont intercalated amines and -OH surface functional groups were involved in Cr(VI) sorption. The scanning electron microscopy combined with energy dispersive X-ray spectroscopy (SEM-EDX) analyses, although partly, indicate that the (wt. %) proportion of cations (e.g., Ca, Mg) in AABP decreased after Cr(VI) sorption. This may be due to ion exchange of chromite (Cr(III)) (produced from Cr(VI) reduction) with cationic elements in AABP. Also, Cr(VI) desorption (using phosphate solution) from AABP was lower (29%) than that from O-mont (51%) up to the third regeneration cycle. This bench scale comparative study highlights that the utilization of widely available and low-cost acid-activated biomaterials has a greater potential than organo-clays for Cr(VI) removal in aqueous media. However, future studies are warranted to precisely delineate different mechanisms of Cr(VI) sorption/reduction by acid-activated biomaterials and organo-clays. SN - 1549-7879 UR - https://www.unboundmedicine.com/medline/citation/27849143/Chromium_VI__sorption_efficiency_of_acid_activated_banana_peel_over_organo_montmorillonite_in_aqueous_solutions_ DB - PRIME DP - Unbound Medicine ER -