Abatement of Cr (VI) from wastewater using a new adsorbent, cantaloupe peel: Taguchi L16 orthogonal array optimization

Ramavandi, Bahman; Asgari, Ghorban; Faradmal, Javad; Sahebi, Soleyman; Roshani, Babak

doi:10.1007/s11814-014-0172-6

Cited by 53 publications

(26 citation statements)

References 15 publications

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“…The results showed that BSO was a mesopore adsorbent. The specific surface area of BSO was 0.487 m 2 /g, which was sup-ported by the data stated in other researches (17,(23)(24)(25). The strong interaction between adsorbate ions and pore walls further controls the filling of mesopores during the adsorption process.…”

Section: Characteristics Of Adsorbentsupporting

confidence: 72%

“…The data related to FTIR spectra before and after Cu 2+ adsorption are presented in Figure 1 and Table 2. The corresponding assignments identified for the BSO are listed in Table 2 according to the previous literatures (24,26). From Table 2, it is reveal that the nitrogen and sulfur groups were absent in the BSO structure, whereas we noted the presence of different oxygen groups, mainly alcohol and phenol groups, carbonyl, ethers and esters.…”

Section: Characteristics Of Adsorbentmentioning

confidence: 68%

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The Potential of Sargassum oligocystum Harvested From Persian Gulf for the Adsorption of Copper Ions From Aqueous Solutions

Ramavandi¹,

Ebrahimi²,

Hashemi³

et al. 2015

Avicenna J Environ Health Eng

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This study revealed the potential of a brown alga, Sargassum oligocystum, harvested from Persian Gulf for the Cu 2+ adsorption from aqueous solutions. The adsorption kinetic and isotherm and the characteristics of the biomass prepared from S. oligocystum (BSO) were investigated. The BSO was a mesoporous adsorbent with Brunauer, Emmett, and Teller (BET) surface area, a total pore volume, and an average pore diameter of 0.487 m 2 /g, 1.423 cm 3 /g and 12.5 nm, respectively. Fourier transform infrared spectroscopy (FTIR) analysis showed that there were many active functional groups such as alcohol and phenol groups, carbonyl, ethers, and esters on the BSO. Batch tests demonstrated that the Langmuir isotherm model best represented the equilibrium data with maximum copper ions adsorption capacity of 8.23 mg/g. Pseudo-second-order kinetic model was found to satisfactory describe the adsorption process. BSO is an easy-prepared adsorbent and could be an option for the treatment of Cu 2+ -laden wastewaters.

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Section: Characteristics Of Adsorbentsupporting

confidence: 72%

Section: Characteristics Of Adsorbentmentioning

confidence: 68%

The Potential of Sargassum oligocystum Harvested From Persian Gulf for the Adsorption of Copper Ions From Aqueous Solutions

Ramavandi¹,

Ebrahimi²,

Hashemi³

et al. 2015

Avicenna J Environ Health Eng

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“…The thermodynamics of Zn(II) adsorption onto the prepared ACTH was evaluated using adsorption experiments performed by Table 1 Isotherm and kinetic models and thermodynamic equations used in this study [14][15][16].…”

Section: Methodsmentioning

confidence: 99%

The behaviors and characteristics of a mesoporous activated carbon prepared from Tamarix hispida for Zn(II) adsorption from wastewater

Khademi

Ramavandi

Ghaneian

2015

Journal of Environmental Chemical Engineering

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“…According to the calculations, the average pore size was 0.71 nm, confirming that DPB was a microporous adsorbent. Because the specific surface area of DPB is relatively low, functional groups likely play a greater role than particle surface area [37] in adsorbing chromium ions from wastewaters.…”

Section: Physical and Chemical Characteristics Of Dpbmentioning

confidence: 99%

Physico-chemical study of dew melon peel biochar for chromium attenuation from simulated and actual wastewaters

Ahmadi

Kouhgardi

Ramavandi

2016

Korean J. Chem. Eng.

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Abstract−This work introduces a biochar as novel adsorbent prepared from the dew melon peel by pyrolysis method, and demonstrates its potential for eliminating Cr(VI) from simulated and actual wastewaters. The dew melon peel biochar (DPB) was characterized by several techniques and methodologies such as, BET, SEM, FTIR, Boehm titration, ultimate analysis, and pHzpc. DPB is a microporous material with the BET specific surface area of 196 m 2 /g. The effects of different parameters including pH, amount of adsorbent, Cr(VI) concentration, and mixing time on the removal of Cr(VI) from wastewater were studied. Maximum adsorption (98.6%) was observed at pH 6 and 100 mg/L metal concentration. The equilibrium adsorption was analyzed by Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich isotherms. Kinetic data were evaluated by pseudo-first order, pseudo-second order, intraparticle diffusion, film diffusion (Boyd), Elovich, and Avrami models. The kinetic data were best fitted to the pseudo-second order model. The Langmuir isotherm model gives the better correlation to predict the adsorption equilibrium, with a maximum adsorption capacity of 198.7 mg/g. The thermodynamic parameters showed that the adsorption of Cr(VI) was endothermic and spontaneous. Competition between the co-existing ions of Cl − , NO 3 − , SO 4 2− , PO 4 3− , and HCO 3 − on the adsorption process was studied. The efficacy of DPB was successfully examined by analyzing the removal of Cr(VI) from two industrial wastewaters. The results indicate that DPB is promising as an effective and economical adsorbent for Cr(VI) ions removal and could be repeatedly used with no significant loss of adsorption efficiency.

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Abatement of Cr (VI) from wastewater using a new adsorbent, cantaloupe peel: Taguchi L16 orthogonal array optimization

Cited by 53 publications

References 15 publications

The Potential of Sargassum oligocystum Harvested From Persian Gulf for the Adsorption of Copper Ions From Aqueous Solutions

The Potential of Sargassum oligocystum Harvested From Persian Gulf for the Adsorption of Copper Ions From Aqueous Solutions

The behaviors and characteristics of a mesoporous activated carbon prepared from Tamarix hispida for Zn(II) adsorption from wastewater

Physico-chemical study of dew melon peel biochar for chromium attenuation from simulated and actual wastewaters

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