Improved waste water treatment by bio-synthesized Graphene Sand Composite

Parvathi, V. Poornima; Umadevi, M.; Raj, R Bhaviya

doi:10.1016/j.jenvman.2015.07.055

Cited by 38 publications

(9 citation statements)

References 19 publications

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“…With regard to the supported AC composites, there are reports in the literature. Some researchers − have prepared AC–sand composite by coating AC on quartz sand. Furthermore, powdered carbonaceous materials were used to coat glass fiber to form composites.…”

Section: Introductionmentioning

confidence: 99%

Waste Glass Fiber Fabric as a Support for Facile Synthesis of Microporous Carbon To Adsorb Cr(VI) from Wastewater

Huang

Mishra

Liu

2017

ACS Sustainable Chem. Eng.

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Activated carbon coated glass fiber fabric (AC@GFF) was successfully synthesized by the carbonization of polyvinylpyrrolidone with the assistance of KOH onto waste glass fiber fabric (GFF). The samples were characterized by XRD, SEM, N 2 -sorption, FTIR, XPS, TG, and DSC measurements. It is shown that KOH not only acted as an activator during the carbonization process but also facilitated the adherence of PVP onto the surface of the glass fibers by increasing the viscosity of the PVP precursor solutions. The prepared AC@GFF was applied to uptake Cr(VI) from synthetic wastewater, and the factors such as the pH, initial concentration of adsorbate, contact time, and adsorption temperature influencing the adsorption of the Cr(VI) were investigated. The adsorption data were fitted with the isotherm and kinetic models. The adsorption of metal ions by the AC@GFF from a real metal passivation wastewater proved that the synthesized adsorbent was highly selective to Cr(VI) against its inferring Zn(II). The spent adsorbent together with the adsorbed Cr ions was used as an effective glass colorant. The method provided a sustainable entrapment of toxic chromium ions in a glass matrix to produce a color glass, eliminating pollutions from the Cr(VI), waste GFF, and spent adsorbent.

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Section: Introductionmentioning

confidence: 99%

Waste Glass Fiber Fabric as a Support for Facile Synthesis of Microporous Carbon To Adsorb Cr(VI) from Wastewater

Huang

Mishra

Liu

2017

ACS Sustainable Chem. Eng.

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“…Also strong peak at 1385 cm −1 could be attributed to C‐O stretching groups. Due to attachment of GQDs to the surface of QS, the vibration of functional groups decreased remarkably, which could be prove the suitable attachment of GQDs to the surface of QS . Disappearance of carbonyl peak in around of 1700 cm −1 proves the reduction of GQDs, which resulted insoluble GQDs|QS.…”

Section: Resultsmentioning

confidence: 86%

“…In the case of GQDs|QS (curve B), the absorption bands at 720 and 1025 cm 21 are attributed to the symmetric SiAOASi stretching and asymmetric SiAO stretching, respectively. Also [20,24]. Disappearance of carbonyl peak in around of 1700 cm 21 proves the reduction of GQDs, which resulted insoluble GQDs|QS.…”

Section: Physico-chemical Properties Of Adsorbentsmentioning

confidence: 94%

Graphene quantum dots coated on quartz sand as efficient and low‐cost adsorbent for removal of Hg²⁺ and Pb²⁺ from aqueous solutions

Mohammad‐Rezaei

Jaymand

2018

Env Prog and Sustain Energy

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Herein, a novel, efficient and inexpensive adsorbent based on graphene quantum dots (GQDs) coated on quartz sand (GQDs|QS) for removal of Hg2+ and Pb2+ from aqueous solutions was reported. The GQDs|QS was characterized by scanning electron microscopy, energy‐dispersive X‐ray spectroscopy, Fourier transform infrared spectroscopy, and X‐ray powder diffraction techniques. To optimize operation parameters and study removal efficiency of the prepared adsorbent, a batch removal system followed by anodic stripping voltammetry technique was used during the experiments. The maximum adsorption capacity of GQDs|QS for Hg2+ and Pb2+ were calculated 24.65 and 24.92 mg g−1, respectively, which reveal more improved adsorption capacitance of the GQDs|QS in comparison with nontreated QS. According to experimental results, adsorption of Hg2+ and Pb2+ on the developed adsorbent follows pseudo‐second order kinetic model. In addition, equilibrium experimental data appropriately fit with the Langmuir isotherm (R2 > 0.99). It was found that the stability and removal performance of the GQDs|QS strongly depend to the particle size of GQDs. Due to low cost, stability and effectiveness of the GQDs|QS, it could be used as a suitable choice for water treatment in industrial scale. © 2018 American Institute of Chemical Engineers Environ Prog, 38: S24–S31, 2019

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“…Hydroxyapatite [HA; Ca 10 (PO4) 6 (OH) 2 ] is commonly used in various forms and shapes in bone and tissue engineering. However, due to their lack of mechanical strength, its usage is discouraged from replacing various parts of the bone system [ 136 ]. Materials such as hydrogels and nano-TiO 2 have been used due to the lack of mechanical strength, aggregation and migration of TiO 2 , limiting their application in tissue engineering [ 134 , 137 , 138 ].…”

Section: Biomedical Applications Of Gbns In Engineeringmentioning

confidence: 99%

A Review on Graphene-Based Nanomaterials in Biomedical Applications and Risks in Environment and Health

et al. 2018

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Graphene-based nanomaterials (GBNs) have attracted increasing interests of the scientific community due to their unique physicochemical properties and their applications in biotechnology, biomedicine, bioengineering, disease diagnosis and therapy. Although a large amount of researches have been conducted on these novel nanomaterials, limited comprehensive reviews are published on their biomedical applications and potential environmental and human health effects. The present research aimed at addressing this knowledge gap by examining and discussing: (1) the history, synthesis, structural properties and recent developments of GBNs for biomedical applications; (2) GBNs uses as therapeutics, drug/gene delivery and antibacterial materials; (3) GBNs applications in tissue engineering and in research as biosensors and bioimaging materials; and (4) GBNs potential environmental effects and human health risks. It also discussed the perspectives and challenges associated with the biomedical applications of GBNs.

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Improved waste water treatment by bio-synthesized Graphene Sand Composite

Cited by 38 publications

References 19 publications

Waste Glass Fiber Fabric as a Support for Facile Synthesis of Microporous Carbon To Adsorb Cr(VI) from Wastewater

Waste Glass Fiber Fabric as a Support for Facile Synthesis of Microporous Carbon To Adsorb Cr(VI) from Wastewater

Graphene quantum dots coated on quartz sand as efficient and low‐cost adsorbent for removal of Hg²⁺ and Pb²⁺ from aqueous solutions

A Review on Graphene-Based Nanomaterials in Biomedical Applications and Risks in Environment and Health

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Improved waste water treatment by bio-synthesized Graphene Sand Composite

Cited by 38 publications

References 19 publications

Waste Glass Fiber Fabric as a Support for Facile Synthesis of Microporous Carbon To Adsorb Cr(VI) from Wastewater

Waste Glass Fiber Fabric as a Support for Facile Synthesis of Microporous Carbon To Adsorb Cr(VI) from Wastewater

Graphene quantum dots coated on quartz sand as efficient and low‐cost adsorbent for removal of Hg2+ and Pb2+ from aqueous solutions

A Review on Graphene-Based Nanomaterials in Biomedical Applications and Risks in Environment and Health

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Graphene quantum dots coated on quartz sand as efficient and low‐cost adsorbent for removal of Hg²⁺ and Pb²⁺ from aqueous solutions