Studies on the removal of Cobalt(II) from aqueous solutions by adsorption with<i>Ficus benghalensis</i>leaf powder through response surface methodology

Hymavathi, D.; Prabhakar, G.

doi:10.1080/00986445.2017.1365063

Cited by 27 publications

(8 citation statements)

References 36 publications

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“…Figure 3 shows the effect of contact time and pH on biosorption of Co(II) (200 mg/L) to the dried fungal biomass; it was found that the highest removal occurred in 24 h of incubation and at pH 5.0: 93%, 77.5%, and 70.4%, for Paecilomyces sp., Penicillium sp., and Aspergillus niger , respectively, and these results are similar to those reported by the calcium alginate of seaweed Macrocystis pyrifera [26], by Cocos nucifera L. leaf powder [27], and by Ficus benghalensis leaf powder [28]. But they are different from those reported by Vannela and Verma [13], who reported the maximum metal biosorption by S. platensis biomass which was observed at pH 6.0, with free and immobilized biomass; by P. catenlannulatus , as the uptake of Co(II) increases with increasing pH from 4.5 to 7.0 and at last remains at a high level at pH 7.0, due to formation of precipitates such as Co(OH) 2 (s) [12]; by alga H. valentiae , at a pH value of 6 [15]; and by P. aeruginosa SPB-1, in which the maximum adsorption of [Co(III)-EDTA] was found to be at pH 7.0 [16].…”

Section: Resultssupporting

confidence: 85%

“…Figure 4 shows the effect of varying temperatures (20°C, 28°C, 40°C, and 50°C), and the maximal adsorption capacity was found at 50 ± 1°C: 100%, 97.1%, and 94.1%, for Paecilomyces sp., Penicillium sp., and A. niger , respectively, at 24 hours, and these results are similar to those reported for P. catenlannulatus , as the uptake of Co(II) increases with increasing temperature from 20 to 40°C [12], P. aeruginosa SPB-1 [16], Cocos nucifera L. leaf powder [27], and F. benghalensis leaf powder [28] and are different from those reported for alga H. valentiae [15], in which it can be seen that the maximum monolayer capacity of the adsorbent decreases from 47.44 to 46.03 mg/L by increasing the temperature from 25°C to 45°C. On the contrary, enhancement of the adsorption capacity of the fungal biomasses at higher temperatures may be attributed to the activation of the adsorbing surface and the accelerated diffusivity of the metal with the increasing temperature and increase in the mobility of metal ions [12].…”

Section: Resultssupporting

confidence: 78%

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Bioremoval of Cobalt(II) from Aqueous Solution by Three Different and Resistant Fungal Biomasses

González

Pérez

Morales

et al. 2019

Bioinorganic Chemistry and Applications

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The biosorption of Co(II) on three fungal biomasses: Paecilomyces sp., Penicillium sp., and Aspergillus niger, was studied in this work. The fungal biomass of Paecilomyces sp. showed the best results, since it removes 93% at 24 h of incubation, while the biomasses of Penicillium sp. and Aspergillus niger are less efficient, since they remove the metal 77.5% and 70%, respectively, in the same time of incubation, with an optimum pH of removal for the three analyzed biomasses of 5.0 ± 0.2 at 28°C. Regarding the temperature of incubation, the most efficient biomass was that of Paecilomyces sp., since it removes 100%, at 50°C, while the biomasses of Penicillium sp. and Aspergillus niger remove 97.1% and 94.1%, at the same temperature, in 24 hours of incubation. On the contrary, if the concentration of the metal is increased, the removal capacity for the three analyzed biomasses decreases; if the concentration of the bioadsorbent is increased, the removal of the metal also increases. It was observed that, after 4 and 7 days of incubation, 100%, 100%, and 96.4% of Co(II) present in naturally contaminated water were removed, respectively.

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Section: Resultssupporting

confidence: 85%

Section: Resultssupporting

confidence: 78%

Bioremoval of Cobalt(II) from Aqueous Solution by Three Different and Resistant Fungal Biomasses

González

Pérez

Morales

et al. 2019

Bioinorganic Chemistry and Applications

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“…South African coal fly ash 0.40 [51] Ficus benghalensis leaf powder 5.65 [52] Banana peel 2.55 [17] Coal based Granular Activated Carbon 0.34 [53] Orange peel 1.82 [17] Ficus religiosa leaf powder 3.60 [54] Cross-Linked Calcium Alginate Beads 1.38 [16] Kaolinite 0.92 [19] Saudi activated bentonite 7.3 [2] Montmorillonite 6.92 [18] Clearing nut seed powder 4.25 This study…”

Section: Adsorbent Adsorption Capacity (Mg/g) Referencesmentioning

confidence: 99%

Adsorptive removal of Co(II) in aqueous solutions using clearing nut seed powder

Ranaweera

Godakumbura

Perera

2020

Heliyon

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The present study assessed the potential use of clearing nut seed powder (Strychnos potatorum) as an adsorbent for the removal of Co(II) ions from aqueous solutions. Based on FTIR analysis, the adsorbent possesses hydroxyl, C-N, and C-O functional groups and SEM analysis indicated the presence of uneven porous surface structure, which is important for adsorption. Batch adsorption studies were performed to investigate the effect of contact time, initial pH, initial Co(II) concentration, adsorbent dosage, and temperature on adsorption. The Langmuir isotherm model provided the best explanation to experimental data with the highest correlation coefficient and the maximum monolayer adsorption capacity obtained was 4.245 mg/g. The pseudo-second-order kinetic model fitted well with the adsorption kinetic data. Sorption thermodynamic data showed that the adsorption process is spontaneous and exothermic in nature. The clearing nut seed powder obtained after surface modification by acid treatment showed a higher adsorption capacity.

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“…FT‐IR Spectra of the adsorbent, before and after adsorption are as shown in Figure (a,a) . Active sites containing O–H stretch and H‐bond in alcohol group, CH bend, CN stretch in amine form and C–Br stretch in alkyl halide are indicated to be responsible for accommodating lead ions.…”

Section: Resultsmentioning

confidence: 99%

“…A multiple regression analysis is conducted to obtain the coefficients so that the equation could be used to estimate the response. The accuracy of the proposed model is then identified by using analysis of variance (ANOVA) and the regression coefficient ( R 2 ) .…”

Section: Methodsmentioning

confidence: 99%

Biosorption of Pb(II) ions onto Cocos nucifera leaf powder: Application of response surface methodology

Hymavathi

Prabhakar

2018

Env Prog and Sustain Energy

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This article presents the outcome obtained when Cocos nucifera leaf powder is used for the adsorptive removal of Pb(II) from aqueous solutions. A 24 full‐factorial design with six center points and eight axial points leading to 30 experimental run, as indicated by Design Expert version 10.0.03 is followed. Surface response analysis is carried out to understand the interactions among the contributing variables—metal ion concentration, initial solution pH, sorbent dosage, and temperature in the removal of metal ions. A 20 mg/L of Pb(II) solution, treated with 25 g/L of adsorbent at a pH of 5.0 and 303 K yielded 97.68% removal of Pb(II). Adsorption equilibrium is as per Freundlich isotherm model and the kinetics are represented by a pseudo second‐order expression with a regression coefficient of 0.999. The maximum biosorption capacity of Cocos nucifera leaf powder is 8.475 mg/g. Thermodynamic analysis suggests that the adsorption is endothermic and spontaneous in nature. Surface morphology of the adsorbent is studied using Fourier Transform Infrared Spectroscopy (FTIR) and Scanning Electron Microscopy‐Energy Dispersive Analysis System (SEM‐EDAX). © 2018 American Institute of Chemical Engineers Environ Prog, 38: S118–S127, 2019

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Studies on the removal of Cobalt(II) from aqueous solutions by adsorption withFicus benghalensisleaf powder through response surface methodology

Cited by 27 publications

References 36 publications

Bioremoval of Cobalt(II) from Aqueous Solution by Three Different and Resistant Fungal Biomasses

Bioremoval of Cobalt(II) from Aqueous Solution by Three Different and Resistant Fungal Biomasses

Adsorptive removal of Co(II) in aqueous solutions using clearing nut seed powder

Biosorption of Pb(II) ions onto Cocos nucifera leaf powder: Application of response surface methodology

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