Synthesis and application of modified Litchi peel for removal of hexavalent chromium from aqueous solutions

Yi, Yunhong; Lv, Junliang; Liu, Yi; Wu, Gongqing

doi:10.1016/j.molliq.2016.10.140

Cited by 68 publications

(26 citation statements)

References 33 publications

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“…Industrial wastewaters contain pollutants which are hazardous to living creatures and environment [8]. Unlike organic pollutants, heavy metals once introduced into the environment cannot be biodegraded [2]. Health metal contamination come from diverse industries such as metal plating facilities, batteries, as well as agricultural sources where fertilizers are intensively used [3].…”

Section: Introductionmentioning

confidence: 99%

Adsorption kinetics of orange peel biosorbents for Cr (VI) uptake from water

Tejada-Tovar¹,

González-Delgado²,

Villabona-Ortíz³

2018

ces

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Adsorptive materials have been widely investigated for removing heavy metal water pollutants and agricultural residues such as fruit peels seems to be a promising alternative due to its low cost and availability. This work attempts to study kinetics of Cr (VI) adsorption onto different orange peels-based biosorbents (OP, OPAC and OP-Chitosan). The activated carbon from orange peels was obtained by carbonizing the biomass and its activation with H3PO4 acid solution. The OP-Chitosan was prepared by immersing orange peels into chitosan-acetic acid gel. The OP biomass was characterized by ultimate analysis in order to determine the composition of main elements (carbon, nitrogen and hydrogen). Batch experiments were carried to analyse adsorption process over time and fit the experimental data to kinetic models such as pseudo-first order, pseudo-second order, Elovich and intraparticle diffusion. It was found that elemental composition of orange peels biomass was C (%) 42.02, H (%) 5.44 % and N (%) 0.7. The pseudo-second order model best fits adsorption results for OPAC and OP-Chitosan with ,2 value of 17.27 and 17.24 mg/g, respectively. For OP biosorbent, pseudo-first order describes appropriately the data with parameter (,1) value of 18.21 mg/g.

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Section: Introductionmentioning

confidence: 99%

Adsorption kinetics of orange peel biosorbents for Cr (VI) uptake from water

Tejada-Tovar¹,

González-Delgado²,

Villabona-Ortíz³

2018

ces

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“…Os íons de metais pesados de valência variável mais comuns são o cromo (Yi et al, 2017) ( III, IV) e o arsênio (III, V) (Chao, H.P. et al, 2014), (Wen et al, 2018).…”

Section: Principais Poluentes Encontrados No Corpos Hídricosunclassified

A Nanotecnologia como Método Alternativo para Remediação de Águas Contaminadas

Silva¹

2021

RECURSO ÁGUA - Tecnologias E Pesquisas Para O Uso E a Conservação De Ecossistemas Aquáticos

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“…Modified litchi peel 9.55 mg/g Yi et al [35] Residual coated silica 0.27 mg/g Kan et al [36] Burcucumber 17.02 mg/g Upamali et al [37] Eucalyptus globulus bark biochar 21.3 mg/g Choudhary and Paul [38] Oleaster seed 0.474 mmol/g Kahraman and Pehlivan [39] Olive stones coated with iron nanoparticles 4.11 mg/g Vilardi et al [40] Activated red mud 25.64 mg/g This work…”

Section: Adsorption Capacity Referencementioning

confidence: 99%

Red mud (aluminum industrial waste): An eco‐friendly treatment of electroplating effluent

Verma

Balomajumder

2020

Can J Chem Eng

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In this work, aluminum industrial waste, red mud (RM), was activated to verify its potential in the management of electroplating wastewater containing hexavalent chromium (Cr(VI)). A comparison between the adsorption capabilities of RM and activated red mud (ARM) towards Cr(VI) from aqueous solutions was made. The effects of several parameters were evaluated. The adsorbents were characterized by field emission scanning electron microscopy (FESEM), Fourier transmission infrared spectroscopy (FTIR), x-ray diffraction (XRD), zeta potential, and thermogravimetric analysis (TGA). The particle size was observed as 23.59 nm. The ARM demonstrated an acceptable adsorption capacity of 25.641 mg/g at a pH of 2, adsorbent dosage of 2 g/L, initial Cr(VI) concentration of 100 mg/L, at 25 C. The experimental data is in good agreement with Langmuir adsorption isotherm. The kinetic study was performed to verify that the adsorption follows pseudo-second-order kinetics. In addition, the ARM showed decent recyclability for adsorbing Cr(VI) as even after three adsorption cycles, and the adsorption capacity was reduced by 30%. The results recommend ARM to be an efficient and cost-effective adsorbent for Cr(VI) removal from industrial wastewater.

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Synthesis and application of modified Litchi peel for removal of hexavalent chromium from aqueous solutions

Cited by 68 publications

References 33 publications

Adsorption kinetics of orange peel biosorbents for Cr (VI) uptake from water

Adsorption kinetics of orange peel biosorbents for Cr (VI) uptake from water

A Nanotecnologia como Método Alternativo para Remediação de Águas Contaminadas

Red mud (aluminum industrial waste): An eco‐friendly treatment of electroplating effluent

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