Application of green synthesized nanocrystalline CuI in the removal of aqueous Mn(VII) and Cr(VI) ions

Archana, K. M.; Yogalakshmi, D.; Rajagopal, Revathy

doi:10.1007/s42452-019-0544-y

Cited by 21 publications

(13 citation statements)

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“…All the adsorption studies were carried out at room temperature and using a shaker for 20 min with 250 rpm. Sampling was made at a time interval of 30 min [51]. The concentration of chromium and zinc was analyzed and determined.…”

Section: Removal Of Cr and Zn By The Chemical Methods Using Chemicallymentioning

confidence: 99%

“…γ-CuI adopts a zinc blende structure with surface crystal defects making it a favorable adsorbent. The vacant positions may act as adsorbing sites for Cr and Zn [51]. Figure 6 shows the morphology and size of the copper iodide nanoparticles, which were determined using SEM analysis.…”

Section: Synthesis Characterization and Application Of Green-synthesmentioning

confidence: 99%

“…AOPs include UV/H 2 O 2 , Fenton and photo-Fenton processes (Fe 2+ /H 2 O 2 and Fe 2+ /H 2 O 2 /UV), ultrasonic process, photocatalysis and electrochemical processes. Among them, priority is given to the photocatalytic degradation with respect to the high efficiency and low energy consumption [50,51].…”

Section: Introductionmentioning

confidence: 99%

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Remediation of heavy metals (Cr, Zn) using physical, chemical and biological methods: a novel approach

et al. 2020

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Heavy metal pollution has become one of the most significant environmental problems globally leading to ecological imbalance. There are many physicochemical and biological methods for the removal of heavy metals. Most of the physicochemical methods are less eco-friendly and less cost-effective, while the biological methods are slow in nature. Recently, nanoparticles have been suggested as efficient alternatives to existing treatment methods, in both resource conservation and environmental remediation of anthropogenic compounds. Nanotechnologies are pervasive solution vectors in our economic environment. Biological synthesis of nanoparticles has grown markedly to create novel materials that are ecofriendly, cost-effective and stable with great importance in wider application in the areas of electronics, medicine and agriculture. Thus, the current work focuses on a comparative remediation of heavy metals using physical, chemical and biological methods and nano-structured copper iodide is used as an adsorbent for the removal of chromium (Cr) and zinc (Zn). In the present study, we have experimented with a few methods in physical (UV light irradiation, adsorption studies using CuI), chemical (UV photocatalysis using CuI) and biological methods (using co-culture bacteria strains). A combination of chemical and biological methods was also probed using CuI-polyvinyl alcohol nano-composite containing bacterial co-cultures. The synthesized nano-composite was characterized using scanning electron microscope. The present study revealed that the most effective and cost-friendly method was using biologically prepared nano-composite of CuI (a combination of both chemical and biological methods) to remediate heavy metals Cr and Zn with a removal efficiency up to ~ 67% for Cr and ~ 55% for Zn at the end of 48 h.

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Section: Removal Of Cr and Zn By The Chemical Methods Using Chemicallymentioning

confidence: 99%

Section: Synthesis Characterization and Application Of Green-synthesmentioning

confidence: 99%

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Remediation of heavy metals (Cr, Zn) using physical, chemical and biological methods: a novel approach

et al. 2020

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“…The petals of the flower were separated and ground to form a paste using distilled water. The paste was further diluted by addition of distilled water and centrifuged, from which the supernatant was used for the synthesis of Copper Iodide nanoparticle (CuI) (Archana et al, 2019). The process was carried out without further purification using AnalR-Grade CuSO4.5H2O and KI and the preparation of CuI nanoparticle form the flower extract was performed based on the literature (Indubala et al, 2018).…”

Section: Extract Preparation From Hibiscus Rosasinensis L Flowermentioning

confidence: 99%

“…INCA Energy 250 Microanalysis System), Fourier transform infrared spectroscopy (Bruker FTIR spectrometer, Alpha-T), UV-visible spectroscopy (Jasco UV-Vis Spectrophotometer, V-50)(Archana et al, 2019).…”

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confidence: 99%

Integrated Approach On Degaradtion Of Azo Dyes Using Laccase Enzyme And Nanoparticle With Its Interaction By In Silco Analysis

Sridharan¹,

Krishnaswamy²,

Murali.K

et al. 2019

Preprint

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Azo dyes, released by the textile industries causes severe damage to the environment and living organisms. The degradation of azo dyes is widely studied using enzymatic methods. Laccase, is a copper containing enzyme that degrades the azo dyes into less toxic compounds. In this work, Laccase enzyme produced by the alkaliphile Pseudomonas mendocina in the degradation of mixed azo dye showed 0.386 U/Ml activity at pH 8.5. Combination of enzymatic and green synthesised nanoparticle were used in the degradation mixed azo dye. Laccase used in the degradation of mixed azo dyes showed 58.46% in 72 hours while the photocatalytic degradation of mixed azo dyes showed 15.98%. The degradation of azo dyes using copper iodide nanoparticle resulted in 15.835% of mixed azo dye degradation. But it was noticed that combined method removed 62.35% of mixed azo dyes in 60 minutes.Interaction of laccase enzyme with azo dyes using in silico analysis predicted the binding energy of RR (-7.19 kcal/mol), RB (-8.57 kcal/mol) and RBL (-9.17 kcal/mol).

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A Smartphone Coupled Freshness Indicator Prepared by Rub‐coating of Hibiscus Flowers on Paper substrates for Visual Monitoring of the Spoilage of Milk

Chaithra

2022

ChemistrySelect

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This study developed an inexpensive and easy-to-use milk freshness indicator (H-Paper) by rub-coating hibiscus flowers onto paper. As per the best of our knowledge, this is the first example of a food quality indicator prepared by direct handrubbing of a natural halochromic material onto paper substrates. Unlike the previously reported colorimetric indicators from natural sources, our indicator does not require the extraction of anthocyanins from the natural product. The H-Paper undergoes a quantifiable color change from green to purple to pink corresponding to fresh, spoiling, and spoiled milk samples. Digital photographs of H-Paper treated with milk samples were acquired using a smartphone, and RGB indices were analyzed using a free application. The red chromatic shift was used as a parameter to quantify color change of H-Paper to follow the spoilage of milk. Anthocyanins present in the hibiscus flowers are responsible for this colorimetric response. This work demonstrates a proof-of-concept for directly rubcoating halochromic materials onto a substrate to fabricate food freshness indicators. The H-Paper indicator has advantages of naked-eye analysis, consumer-friendliness, and instrument-free operation. This requires neither any laboratory accessories nor the expertise of a trained analyst for its preparation and operation, which is appropriate for use in resource-limited settings.

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Application of green synthesized nanocrystalline CuI in the removal of aqueous Mn(VII) and Cr(VI) ions

Cited by 21 publications

References 50 publications

Remediation of heavy metals (Cr, Zn) using physical, chemical and biological methods: a novel approach

Remediation of heavy metals (Cr, Zn) using physical, chemical and biological methods: a novel approach

Integrated Approach On Degaradtion Of Azo Dyes Using Laccase Enzyme And Nanoparticle With Its Interaction By In Silco Analysis

A Smartphone Coupled Freshness Indicator Prepared by Rub‐coating of Hibiscus Flowers on Paper substrates for Visual Monitoring of the Spoilage of Milk

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