Enhanced Cr(VI) Removal by Nanozerovalent Iron-Immobilized Alginate Beads in the Presence of a Biofilm in a Continuous-Flow Reactor

Ravikumar, K.; Kumar, Deepak; Kumar, Gaurav; Pulimi, Mrudula; Chandrasekaran, Natarajan; Mukherjee, Amitava

doi:10.1021/acs.iecr.6b01006

Cited by 50 publications

(17 citation statements)

References 44 publications

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“…TC removal percentage (%) and removal capacity (mg/g) can be determined by Eq. ( 6) and ( 7), respectively (Gokhale et al, 2009;Ravikumar et al, 2016a):…”

Section: Fixed-bed Column Study For Tc Removalmentioning

confidence: 99%

In situ formation of bimetallic FeNi nanoparticles on sand through green technology: Application for tetracycline removal

Ravikumar

Ghosh

Pulimi

et al. 2019

Front. Environ. Sci. Eng.

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In this study, FeNi nanoparticles were green synthesized using Punica granatum (pomegranate) peel extract, and these nanoparticles were also formed in situ over quartz sand (GS-FeNi) for removal of tetracycline (TC). Under the optimized operating conditions, (GS-FeNi concentration: 1.5% w/v; concentration of TC: 20 mg/L; interaction period: 180 min), 99AE0.2% TC removal was achieved in the batch reactor. The removal capacity was 181AE1 mg/g. A detailed characterization of the sorbent and the solution before and after the interaction revealed that the removal mechanism(s) involved both the sorption and degradation of TC. The reusability of reactant was assessed for four cycles of operation, and 77AE4% of TC removal was obtained in the cycle. To judge the environmental sustainability of the process, residual toxicity assay of the interacted TC solution was performed with indicator bacteria (Bacillus and Pseudomonas) and algae (Chlorella sp.), which confirmed a substantial decrease in the toxicity. The continuous column studies were undertaken in the packed bed reactors using GS-FeNi. Employing the optimized conditions, quite high removal efficiency (978AE5 mg/g) was obtained in the columns. The application of GS-FeNi for antibiotic removal was further evaluated in lake water, tap water, and ground water spiked with TC, and the removal capacity achieved was found to be 781AE5, 712AE5, and 687AE3 mg/g, respectively. This work can pave the way for treatment of antibiotics and other pollutants in the reactors using novel green composites prepared from fruit wastes.

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“…TC removal percentage (%) and removal capacity (mg/g) can be determined by Eq. ( 6) and ( 7), respectively (Gokhale et al, 2009;Ravikumar et al, 2016a):…”

Section: Fixed-bed Column Study For Tc Removalmentioning

confidence: 99%

In situ formation of bimetallic FeNi nanoparticles on sand through green technology: Application for tetracycline removal

Ravikumar

Ghosh

Pulimi

et al. 2019

Front. Environ. Sci. Eng.

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“…21,22 A series of technical methods such as adsorption, chemical leaching, ion exchange, precipitation, biological methods, and photocatalysis have been used to reduce the Cr(VI). 21,[23][24][25][26][27][28][29][30][31] However, it is not easy to nd a universal reduction technology, and we still need to make continuous efforts.…”

Section: Introductionmentioning

confidence: 99%

A facile approach to synthesize CdS–attapulgite as a photocatalyst for reduction reactions in water

Xie

Huang

et al. 2021

RSC Adv.

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“…Other studies employed host materials to immobilize nZVI. The reported host materials included PAN 27,28 , cellulose 29 , calcium alginate 30,31 , modified clays 32,33 , clinoptilolite 34 , mesoporous molecular sieves 35 , and porous polymers 36 .…”

Section: Introductionmentioning

confidence: 99%

Filter paper supported nZVI for continuous treatment of simulated dyeing wastewater

Sun

et al. 2019

Sci Rep

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In this study, polyacrylic acid modified filter paper (FP/PAA) was synthesized by in-situ polymerization of acrylic acid, which was used as a matrix to chelate nano-scale zero valent iron (nZVI). The loading content of nZVI in the filter paper reached 24.8%. The fabricated composite FP/PAA/nZVI was characterized by SEM, FT-IR and TGA respectively. Moreover, it was used for the removal of methyl blue and methylene blue as model anionic and cationic dyes. The effect of initial dye concentration on decolorization efficiency was investigated. The results showed that FP/PAA/nZVI enhanced the removal of dye from the simulated dye wastewater and the decolorization efficiency exceeded 95% for the dye solutions lower than 20 mg/L. More importantly, the filter paper supported nZVI realized the continuous treatment of simulated dye wastewater by a simple filtration process. This study hopes to serve as a basis for the application of nZVI in textile wastewater treatment.

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Enhanced Cr(VI) Removal by Nanozerovalent Iron-Immobilized Alginate Beads in the Presence of a Biofilm in a Continuous-Flow Reactor

Cited by 50 publications

References 44 publications

In situ formation of bimetallic FeNi nanoparticles on sand through green technology: Application for tetracycline removal

In situ formation of bimetallic FeNi nanoparticles on sand through green technology: Application for tetracycline removal

A facile approach to synthesize CdS–attapulgite as a photocatalyst for reduction reactions in water

Filter paper supported nZVI for continuous treatment of simulated dyeing wastewater

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