Enhanced Cr(VI) removal based on reduction-coagulation-precipitation by NaBH 4 combined with fly ash leachate as a catalyst

Zhao, Shengxin; Chen, Zhonglin; Shen, Jimin; Qu, Yanfeng; Wang, Binyuan; Wang, Xin

doi:10.1016/j.cej.2017.04.057

Cited by 43 publications

(7 citation statements)

References 39 publications

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“…Using aforementioned concept, reduction of Cr(VI) to Cr(III) by NaBH 4 in the presence of fly ash leachate (FAL) has been reported by Zhao et al (2017) . They reported that NaBH 4 reduces metal ions present in FAL to metal nanoparticles which act as catalyst for reduction Cr(VI) by NaBH 4 .…”

Section: Chemistry Of Cr(vi) Reductionmentioning

confidence: 99%

Inorganic nanoparticles for reduction of hexavalent chromium: Physicochemical aspects

Farooqi

Akram

Begum

et al. 2021

Journal of Hazardous Materials

107

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Section: Chemistry Of Cr(vi) Reductionmentioning

confidence: 99%

Inorganic nanoparticles for reduction of hexavalent chromium: Physicochemical aspects

Farooqi

Akram

Begum

et al. 2021

Journal of Hazardous Materials

107

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“…Cr(VI) is one of the most toxic and dangerous heavy metal cations, and many studies have been conducted on the removal of Cr(VI) or reduction of highly toxic Cr(VI) to Cr(III), which has a much lower toxicity [197,198]. Different methods such as membrane separation, adsorption, ion exchange, and reduction have been reported for Cr(VI) removal [199]. Photocatalytic reduction of Cr(VI) from wastewater using renewable solar energy is an effective and promising method to control chromium pollution.…”

Section: 3 Metal Organic Framework For Photocatalytic Water Treatmentmentioning

confidence: 99%

Photocatalytic Water and Wastewater Treatment

2022

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This book aims to provide an overview of how photocatalysis can be employed in water and wastewater treatment. Each chapter will attend to a different area of interest, starting with an introduction on the fundamentals of photocatalysis. The covered topics include metal organic frameworks (MOFs), photocatalytic reactor types and configurations, landfill leachate treatment, and life cycle assessment (LCA) of solar photocatalytic wastewater treatment. In addition, the final two chapters provide fresh new insight, by analyzing international patents on photocatalytic materials, solar photocatalysis, and nanotechnology. ISBN: 9781789061925 (Paperback) ISBN: 9781789061932 (eBook) ISBN: 9781789061949 (ePUB)

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“…Therefore, chromium (III) oxide (Cr 2 O 3 ) is a promising material due to its low cost; wide utilization in applications, including solar energy collectors; its non-reciprocal optical properties; etc. [ 52 , 53 , 54 , 55 , 56 , 57 ]. In addition, Cr 2 O 3 is studied to accelerate NaBH 4 hydrolysis reactions.…”

Section: Introductionmentioning

confidence: 99%

A High-Performance Cr2O3/CaCO3 Nanocomposite Catalyst for Rapid Hydrogen Generation from NaBH4

Alshammari,

Alhassan

et al. 2024

Nanomaterials

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This study aims to prepare new nanocomposites consisting of Cr2O3/CaCO3 as a catalyst for improved hydrogen production from NaBH4 methanolysis. The new nanocomposite possesses nanoparticles with the compositional formula Cr2−xCaxO3 (x = 0, 0.3, and 0.6). These samples were prepared using the sol-gel method, which comprises gelatin fuel. The structure of the new composites was studied using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, environmental scanning electron microscopy (ESEM), and X-ray spectroscopy (XPS). The XRD data showed the rhombohedral crystallinity of the studied samples, and the average crystal size was 25 nm. The FTIR measurements represented the absorption bands of Cr2O3 and CaO. The ESEM micrographs of the Cr2O3 showed the spherical shape of the Cr2O3 nanoparticles. The XPS measurements proved the desired oxidation states of the Cr2−xCaxO3 nanoparticles. The optical band gap of Cr2O3 is 3.0 eV, and calcium doping causes a reduction to 2.5 and 1.3 eV at 15.0 and 30.0% doping ratios. The methanolysis of NaBH4 involved accelerated H2 production when using Cr2−xCaxO3 as a catalyst. Furthermore, the Cr1.7Ca0.3O3 catalyst had the highest hydrogen generation rate, with a value of 12,750 mL/g/min.

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Enhanced Cr(VI) removal based on reduction-coagulation-precipitation by NaBH 4 combined with fly ash leachate as a catalyst

Cited by 43 publications

References 39 publications

Inorganic nanoparticles for reduction of hexavalent chromium: Physicochemical aspects

Inorganic nanoparticles for reduction of hexavalent chromium: Physicochemical aspects

Photocatalytic Water and Wastewater Treatment

A High-Performance Cr2O3/CaCO3 Nanocomposite Catalyst for Rapid Hydrogen Generation from NaBH4

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