Facile green synthesis of ZnO–CdWO4 nanoparticles and their potential as adsorbents to remove organic dye

Fatima, Bushra; Siddiqui, Sharf Ilahi; Nirala, Ranjeet Kumar; Vikrant, Kumar; Kim, Ki‐Hyun; Ahmad, Rabia; Chaudhry, Saif Ali

doi:10.1016/j.envpol.2020.116401

Cited by 54 publications

(14 citation statements)

References 64 publications

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“…ZnO–CdWO 4 nanoparticles had been synthesized by a green method with lemon leaf extract to favorably anchor functional groups on their surfaces [ 13 ]. The prepared nanoparticles were used as an adsorbent of Congo red.…”

Section: Adsorbents For the Removal Of Anionic Dyes From Watersmentioning

confidence: 99%

Organic Dyes versus Adsorption Processing

López

2021

Molecules

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Even in the first quarter of the XXI century, the presence of organic dyes in wastewaters was a normal occurrence in a series of countries. As these compounds are toxic, their removal from these waters is a necessity. Among the separation technologies, adsorption processing appeared as one of the most widely used to reach this goal. The present work reviewed the most recent approaches (first half of the 2021 year) regarding the use of a variety of adsorbents in the removal of a variety of organic dyes of different natures.

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Section: Adsorbents For the Removal Of Anionic Dyes From Watersmentioning

confidence: 99%

Organic Dyes versus Adsorption Processing

López

2021

Molecules

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“…ZnO-CdWO4 nanoparticles have been synthesized by a green method with lemon leaf extract to favorably anchor functional groups on their surface [23]. The prepared nanoparticles were used as adsorbent of Congo red.…”

Section: Adsorptionmentioning

confidence: 99%

Organic Dyes Versus Adsorption Processing

López

2021

Preprint

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Even in the first quarter of XXI century, the presence of organic dyes in wastewaters is a normal occurrence in a series of countries, and being these compounds toxics, their removal from these waters is of a necessity. Among the separation technologies, adsorption processing appeared as one of the most widely used to reach this goal. The present work reviewed the most recent approaches (first half of 2021 year) about the use of a variety of adsorbents on the removal of, also, a variety of organic dyes of different nature.

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“…In some studies, virgin CdWO 4 has also been used as an adsorbent [8]; however, further study has hardly been reported. Cd is a very toxic element; however, in the bound state with another MO, its toxicity may reduce (e.g., zinc oxide coupled CdWO 4 ) [14]. Hence, to make further advance and efficient virgin CdWO 4 , CdWO 4 is mixed with several other metals [15], metal sulfides (MS) [16], and MO [14], of which the zinc oxide coupled CdWO 4 is the only one which showed adsorption application [14].…”

Section: Introductionmentioning

confidence: 99%

“…Cd is a very toxic element; however, in the bound state with another MO, its toxicity may reduce (e.g., zinc oxide coupled CdWO 4 ) [14]. Hence, to make further advance and efficient virgin CdWO 4 , CdWO 4 is mixed with several other metals [15], metal sulfides (MS) [16], and MO [14], of which the zinc oxide coupled CdWO 4 is the only one which showed adsorption application [14]. This material was prepared with a green method using plant extract.…”

Section: Introductionmentioning

confidence: 99%

“…This material was prepared with a green method using plant extract. The couplings of MS and MO with CdWO 4 have shown advantageous properties (such as nominal cost and ease of production, environmentally benign, high surface properties, and narrow band gap) over other NMs and virgin CdWO 4 [14][15][16][17]. All these materials prominently displayed photocatalytic properties and showed better ability than virgin.…”

Section: Introductionmentioning

confidence: 99%

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Facile Synthesis of Cu-Zn Binary Oxide Coupled Cadmium Tungstate (Cu-ZnBO-Cp-CT) with Enhanced Performance of Dye Adsorption

Fatima

Alwan

Siddiqui

et al. 2021

Water

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This study reports the synthesis of copper–zinc binary oxide coupled cadmium tungstate through a simple bio-precipitation method followed by calcination at 600 °C and its adsorption application. The characterization analysis reveals that the prepared composite has low particles size (nano-range), high porosity, and functional groups on the surface. The calcination of sample at 600 °C causes some essential function groups to disappear on the surface. Prepared composite was found to be effective adsorptive material to treat Congo red dye in aqueous solution. 2.5 g L−1 dose of adsorbent could remove more than 99% Congo red dye from 10 mg L−1 solution and more than 80% Congo red dye from 60 mg L−1 aqueous solution. The maximum adsorption capacity of present adsorbent was calculated to be 19.6 mg Congo red per gram of adsorbent. Isotherms analysis suggested a physio-chemical adsorption process. Thermodynamic analysis revealed a exothermic and feasible adsorption process. Adsorption rate was well explained by pseudo second order kinetics. The rate determining step was intra-particle diffusion evaluated from the Weber-Morris plot. To assess the adsorption performance of present adsorbent for Congo red dye the partition coefficient and adsorption equilibrium capacity were compared with other adsorbents. The partition coefficient and adsorption equilibrium values for 10 mg L−1 aqueous solution were found to be approximately 83.3 mg g−1 µM−1 and 4.0 mg g−1 at 30 °C and 7.0 pH using 2.5 g L−1 adsorbent. The value of partition coefficient was found to be higher than previous reported zinc oxide coupled cadmium tungstate having partition coefficient = as 21.4 mg g−1 µM−1 at 30 °C and 7.0 pH using 2.0 g L−1 adsorbent. These results suggested that present adsorption technology is efficient for wastewater treatment.

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Facile green synthesis of ZnO–CdWO4 nanoparticles and their potential as adsorbents to remove organic dye

Cited by 54 publications

References 64 publications

Organic Dyes versus Adsorption Processing

Organic Dyes versus Adsorption Processing

Organic Dyes Versus Adsorption Processing

Facile Synthesis of Cu-Zn Binary Oxide Coupled Cadmium Tungstate (Cu-ZnBO-Cp-CT) with Enhanced Performance of Dye Adsorption

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