Simultaneous removal of Cu(II), Cd(II), Cr(VI), and rhodamine B in wastewater using TiO2 nanofibers membrane loaded on porous fly ash ceramic support

Zhang, Jiayu; Yan, Mi; Sun, Guangai; Liu, Kaiqi

doi:10.1016/j.seppur.2021.118888

Cited by 40 publications

(13 citation statements)

References 43 publications

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“…It was found that photocatalytic degradation of methyl orange increased as Cr (III) ion concentration increased from 1 mg/L to 50 mg/L [82]. Recently, TiO 2 nanofibers on a porous ceramic support of fly ash (TNM-PFACS), manufactured using the hydrothermal technique, showed the simultaneous elimination of the rhodamine B (RhB) dye and Cu (II), Cd (II), and Cr (VI) heavy metal ions through synergism and antagonism between the adsorption and photodegradation process [83]. A high elimination rate (90.15%) was found and the adsorption capacity (9.56 mg/g) of Cu (II) was maintained while the adsorption of the Cd (II) ion was disabled.…”

Section: Removal Of Heavy Metal Ions Frommentioning

confidence: 99%

Heavy Metal Removal from Aqueous Effluents by TiO₂ and ZnO Nanomaterials

Lissarrague

Alshehri

Alsalhi

et al. 2023

Adsorption Science & Technology

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The presence of heavy metals in wastewater, such as Ni, Pb, Cd, V, Cr, and Cu, is a serious environmental problem. This kind of inorganic pollutant is not biodegradable for several years, and its harmful effect is cumulative. Recently, semiconductor nanomaterials based on metal oxides have gained interest due to their efficiency in the removal of heavy metals from contaminated water, by inducing photocatalytic ion reduction when they absorb light of the appropriate wavelength. The most commonly applied semiconductor oxides for these purposes are titanium oxide (TiO2), zinc oxide (ZnO), and binary nanomaterials composed of both types of oxides. The main purpose of this work is to critically analyse the existent literature concerning this topic focusing specially in the most important factors affecting the adsorption or photocatalytic capacities of this type of nanomaterials. In particular, photocatalytic activity is altered by various factors, such as proportion of polymorphs, synthesis method, surface area, concentration of defects and particle size, among others. After a survey of the actual literature, it was found that, although these metal oxides have low absorption capacity for visible light, it is possible to obtain an acceptable heavy metal reduction performance by sensitization with dyes, doping with metallic or nonmetallic atoms, introduction of defects, or the coupling of two or more semiconductors.

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Section: Removal Of Heavy Metal Ions Frommentioning

confidence: 99%

Heavy Metal Removal from Aqueous Effluents by TiO₂ and ZnO Nanomaterials

Lissarrague

Alshehri

Alsalhi

et al. 2023

Adsorption Science & Technology

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“…In another study, the removal of Cr increased from 7.09 % to 59.47 % in the presence of rhodamine B, Cu (II), and Cd (II). [42] The Cr removal percentage increased from 23 % to the highest removal of almost 100 % in the presence of Fe. [41] This removal behavior was attributed to absorptive competition among cationic species.…”

Section: Chromium (Iii) Lead (Ii) and Methyl Orange (Om) Removalmentioning

confidence: 94%

“…Several studies have been conducted on the application of filters in the removal of dyes such as methyl orange (MO) and toxic metals including chromium (Cr). [24][25][26][27][28][29][30] A comparative analysis of the capabilities of the filters used in the above-mentioned studies and the filters fabricated and used in the current study is discussed. The fabricated ceramic filters are deemed to be cost-effective and environmentally friendly because they were derived from natural clay (a sustainable and natural material) and the macadamia nutshells (an agricultural waste product from the macadamia nuts processing industry).…”

Section: Introductionmentioning

confidence: 99%

Fabrication, Characterization and Removal of Methyl Orange, Chromium (Cr) and Lead (Pb) in Aqueous Solutions by Low‐Cost Clay/Macadamia Nutshell Powder Ceramic Filters

2023

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Producing drinking water from polluted water is expensive; thus, the fabrication of environmentally‐friendly and cost‐effective materials to treat polluted water is vital. A strategy involving the exploitation of waste resources to mitigate their impact on the environment has attracted special attention. This strategy is achievable by, among other things, developing materials including ceramic filters. In this study, natural clay, and macadamia nutshell powder were used to fabricate ceramic filters to remove methyl orange (MO), chromium (Cr), and lead (Pb) from aqueous solutions. The physicochemical characteristics of the fabricated filters were carried out and their ability to remove the pollutants was investigated. The filter with 20 wt% macadamia nutshell powder (M2) removed 92 %, 62 %, and 29 % of MO, Pb (II), and Cr (III), respectively. This was attributable to the high porosity of the filter as demonstrated by Brunauer‐Emmett‐Teller analysis. Furthermore, there was an increase on the removal of Cr (29.71 % to 84.5 %) in the presence of other competing co‐metals, however, a drop in Pb removed was observed (62.99 % to 38.67 %). Turbidity removal of up to 97.2 % was achieved using the M2 filter. The reported filter fabrication approach is facile, easy to replicate without special training, and environmentally friendly.

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“…In some cases, the presence of one pollutant was found to enhance the removal of another pollutant. For instance, the presence of rhodamine B dye, during the transformation of aqueous metal chromium (IV) to chromium (III) using titanium dioxide nano-fibre membrane accelerated the removal rate (Zhang et al 2021 ), and under optimized conditions, the removal efficiency of chromium (IV) was found to be 97.09%.…”

Section: Applications Of Titanium Dioxidementioning

confidence: 99%

Synthesis and application of titanium dioxide photocatalysis for energy, decontamination and viral disinfection: a review

Nachiappan²,

et al. 2022

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Global pollution is calling for advanced methods to remove contaminants from water and wastewater, such as TiO 2 -assisted photocatalysis. The environmental applications of titanium dioxide have started after the initial TiO 2 application for water splitting by Fujishima and Honda in 1972. TiO 2 is now used for self-cleaning surfaces, air and water purification systems, microbial inactivation and selective organic conversion. The synthesis of titanium dioxide nanomaterials with high photocatalytic activity is actually a major challenge. Here we review titanium dioxide photocatalysis with focus on mechanims, synthesis, and applications. Synthetic methods include sol-gel, sonochemical, microwave, oxidation, deposition, hydro/solvothermal, and biological techniques. Applications comprise the production of energy, petroleum recovery, and the removal of microplastics, pharmaceuticals, metals, dyes, pesticides, and of viruses such as the severe acute respiratory syndrome coronavirus 2.

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Simultaneous removal of Cu(II), Cd(II), Cr(VI), and rhodamine B in wastewater using TiO2 nanofibers membrane loaded on porous fly ash ceramic support

Cited by 40 publications

References 43 publications

Heavy Metal Removal from Aqueous Effluents by TiO₂ and ZnO Nanomaterials

Heavy Metal Removal from Aqueous Effluents by TiO₂ and ZnO Nanomaterials

Fabrication, Characterization and Removal of Methyl Orange, Chromium (Cr) and Lead (Pb) in Aqueous Solutions by Low‐Cost Clay/Macadamia Nutshell Powder Ceramic Filters

Synthesis and application of titanium dioxide photocatalysis for energy, decontamination and viral disinfection: a review

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Simultaneous removal of Cu(II), Cd(II), Cr(VI), and rhodamine B in wastewater using TiO2 nanofibers membrane loaded on porous fly ash ceramic support

Cited by 40 publications

References 43 publications

Heavy Metal Removal from Aqueous Effluents by TiO2 and ZnO Nanomaterials

Heavy Metal Removal from Aqueous Effluents by TiO2 and ZnO Nanomaterials

Fabrication, Characterization and Removal of Methyl Orange, Chromium (Cr) and Lead (Pb) in Aqueous Solutions by Low‐Cost Clay/Macadamia Nutshell Powder Ceramic Filters

Synthesis and application of titanium dioxide photocatalysis for energy, decontamination and viral disinfection: a review

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Heavy Metal Removal from Aqueous Effluents by TiO₂ and ZnO Nanomaterials

Heavy Metal Removal from Aqueous Effluents by TiO₂ and ZnO Nanomaterials