Waste Litchi Peels for Cr(VI) Removal from Synthetic Wastewater in Batch and Continuous Systems: Sorbent Characterization, Regeneration and Reuse Study

Manikandan, N. Arul; Alemu, Addis Kokeb; Goswami, Lalit; Pakshirajan, Kannan; Pugazhenthi, G.

doi:10.1061/(asce)ee.1943-7870.0001099

Cited by 43 publications

(18 citation statements)

References 27 publications

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“…For decades, activated carbons are traditionally utilized for the removal of heavy metal ions from the wastewater which costs around $2000 USD per ton in India (Arul Manikandan et al, 2016). As previously mentioned in the literature, the sorbent utilized for performing this study i.e., Azolla filiculoides and Hydrilla verticillata, aquatic macrophytes, not associated with any economic use.…”

Section: Cost Estimationmentioning

confidence: 87%

“…Heavy metals tend to accumulate and concentrate in the living tissues through the food chain, imposing its adverse impact on human health (Etesami, 2018). Henceforth, treatment of wastewater containing heavy metals prior to their discharge is mandatory due to the increasingly restrictive legislation (Arul Manikandan, Alemu, Goswami, Pakshirajan, & Pugazhenthi, 2016).…”

Section: Introductionmentioning

confidence: 99%

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Comparative analysis of floating and submerged macrophytes for heavy metal (copper, chromium, arsenic and lead) removal: sorbent preparation, characterization, regeneration and cost estimation

Bind¹,

Goswami²,

Prakash³

2018

Geology, Ecology, and Landscapes

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In this study, a comparative evaluation of floating and submerged macrophytes was performed. Azolla filiculoides (free floating) and Hydrilla verticillata (submerged) aquatic macrophytes were utilized for arsenic, copper, chromium and lead removal from the respective metallic ion solutions. Batch experiments were performed initially with optimization of different physical parameters viz., pH, initial heavy metal concentration, biosorbent dosage, contact time, temperature and agitation speed. Submerged (Hydrilla verticillata) had depicted better removal efficiency in comparison to the floating macrophyte (Azolla filiculoides). Field emission scanning electron microscopy equipped with energy dispersive spectroscopy and Fourier transform infrared spectroscopy analysis was performed for the characterization of the metal loaded biosorbents. Biosorption of the respective heavy metal was clearly depicted in the FESEM-EDX spectrum, although not much change in the morphology of the biosorbents were examined. FTIR spectra of the biosorbents obtained after the experiments confirmed the involvement of C-H bend, -CH 2 -(C=O), N-H, -C-O, R 2 -C= bending and -C-C=O on the biomass. Furthermore, the biosorbent regeneration followed by heavy metal biosorption confirmed the reusability of the prepared biosorbent for at least two consecutive cycles without much significant change in the heavy metal biosorption capacity.

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Section: Cost Estimationmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Comparative analysis of floating and submerged macrophytes for heavy metal (copper, chromium, arsenic and lead) removal: sorbent preparation, characterization, regeneration and cost estimation

Bind¹,

Goswami²,

Prakash³

2018

Geology, Ecology, and Landscapes

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“…On the other hand, Manikandan et al (2016) studied Cr (VI) adsoption by waste litchi peels. They found that when inlet concentration increased, the breakthrough time decreased which is in accordance with the results obtained in this work.…”

Section: Resultsmentioning

confidence: 99%

Modeling the mass transfer in biosorption of Cr (VI) y Ni (II) by natural sugarcane bagasse

et al. 2018

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The Cr (VI) and Ni (II) ion biosorption process by natural sugarcane bagasse in a fixed bed column was investigated. The characteristic removal parameters such as retention capacity, removal percent and unused bed length were experimentally determined at different operating conditions. Overall mass transfer coefficient was investigated and reported for the studied biosorption system. The breakthrough curves were simulated using Matlab2010a software to check the validity of the obtained overall mass transfer coefficients. Experimental data fitted well with predicted data (R 2 = 0.94). A statistical analysis was performed using the software Statgraphics Centurion-X V 15.2.06 to compare the simulated and experimental data. No significant differences were observed between experimental and simulated data. The best operating conditions for Cr (VI) removal were 15 mg/L of inlet concentration and 1.5 g of biosorbent. For Ni (II) removal the best results were obtained with 25 mg/L of inlet concentration and 1.5 g of solid. The results obtained through the breakthrough curve showed high removal percentages (94.70 and 97.90% for chromium and nickel, respectively). Moreover, results indicated that sorption of these metals was irreversible and it was controlled by the mass transfer at the external film.

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“…Bands enveloped from 1634 to 1648 cm −1 correspond to the primary amine, attributing to the amide I and II bands. A wide band spectrum at around 3250 cm −1 assigned O-H groups (Arul Manikandan et al 2016).…”

Section: Characterization Of Heavy-metal-loaded Biomassmentioning

confidence: 99%

“…Globally, heavy metals are very well recognized for their ill effects since ages, representing a serious environmental concern and threat to the ecosystem (Ahmad et al 2018;Kushwaha et al 2018). Unlike organic contaminants, heavy metals (HMs), viz., copper, chromium, arsenic and lead, are among the prime pollutants of the aquatic bodies because of their toxic, persistent, non-degradable nature, and bioaccumulative capability among the food web and tissues in human bodies (Singh et al 2019;Bind et al 2018;Goswami et al 2017a;Arul Manikandan et al 2016). It causes serious problems to human beings in relation to the respiratory, reproductive, cardiovascular, endocrine and immunological systems leading to insomnia, irritability, anemia, dizziness and muscles weakness (Kushwaha et al 2015, Goswami et al 2019.…”

Section: Introductionmentioning

confidence: 99%

Biosorption valorization of floating and submerged macrophytes for heavy-metal removal in a multi-component system

et al. 2019

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This study comprises the comparative evaluation of floating (Azolla filiculoides) and submerged (Hydrilla verticillata) macrophytes for potential biosorption of Cu(II), Cr(VI), As(III) and Pb(II) from aqueous solution in a multi-component study. Statistically valid Plackett-Burman design of experiments was employed with four heavy metals at two different levels by varying their initial concentration in the range 10-50 mg L −1 for both the macrophytes. The maximum removal efficiency for Pb(II) was obtained for both the biosorbents, i.e., Azolla sp. (81.4%) and Hydrilla sp. (84.3%) within 4 h of the experimental runs, with an initial concentration of 10 mg L −1 of all the heavy metals. Followed by Pb(II) removal, a declining trend for the removal (%) for Cu(II), As(III) and Cr(VI) was obtained, for all the experimental runs. Also, the minimum removal (%) for all the experimental runs was attained at 25 mg L −1 (maximum) for all the heavy-metal concentration level. The removal efficiency (%) trends follow the order: Pb(II) > Cu(II) > As(III) > Cr(VI) for both the biosorbents. Analysis of variance and Student's t test of the metal bioremoval revealed that main (individual) effect due to the metals was highly significant (P value < 0.05) on each other's removal. Student's t test results revealed that both Pb(II) and Cu(II) strongly inhibited both Cu(II) removal (P value < 0.01), while Cr(VI) has only inhibitory effect on Pb(II) removal. Henceforth, all these results simultaneously depicted good potential of the aquatic macrophytes for the biosorption capability of heavy metal and the effect of individual metals on each other's removal in the multi-component system. Keywords Heavy metals • Multi-component system • Aquatic macrophytes • Plackett-Burman design of experiments • Azolla filiculoides • Hydrilla verticillata

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Waste Litchi Peels for Cr(VI) Removal from Synthetic Wastewater in Batch and Continuous Systems: Sorbent Characterization, Regeneration and Reuse Study

Cited by 43 publications

References 27 publications

Comparative analysis of floating and submerged macrophytes for heavy metal (copper, chromium, arsenic and lead) removal: sorbent preparation, characterization, regeneration and cost estimation

Comparative analysis of floating and submerged macrophytes for heavy metal (copper, chromium, arsenic and lead) removal: sorbent preparation, characterization, regeneration and cost estimation

Modeling the mass transfer in biosorption of Cr (VI) y Ni (II) by natural sugarcane bagasse

Biosorption valorization of floating and submerged macrophytes for heavy-metal removal in a multi-component system

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