Efficient toxic nitrite monitoring and removal from aqueous media with ligand based conjugate materials

Kamel, Rasha M.; Shahat, Ahmed; Hegazy, W. H.; Khodier, Eslam M.; Awual, Md. Rabiul

doi:10.1016/j.molliq.2019.04.060

Cited by 174 publications

(18 citation statements)

References 110 publications

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“…A quantum confinement effect could explain the larger bandgap. Our work opens the door to the recycling of nanoparticles, an area that has little research to date but great importance and potential for the future [26]. e reported ZnO film has suitable properties for optoelectronic and photovoltaic applications.…”

Section: Discussionmentioning

confidence: 89%

Morphological, Structural, and Optical Bandgap Characterization of Extracted ZnO Nanoparticles from Commercial Paste

Nabil

Perez-Quintana

Acosta

et al. 2021

Advances in Materials Science and Engineering

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ZnO nanoparticles (NPs) were extracted from a commercial paste in both colloidal and precipitate forms. The Zetasizer analysis performed on the colloid showed ZnO NPs ranging from ∼30 nm to ∼100 nm. Thin films of ZnO were deposited on glass substrates by spin-coating technique from a mixture of the extracted colloid and precipitate. The scanning electron microscope (SEM) images showed uniformly arranged, mesoporous, and nanostructured ZnO particles of different shapes, with an estimated film thickness of 0.67 μm. Analysis by energy dispersive X-ray spectroscopy (EDS) and X-ray diffraction analysis (XRD) confirmed the presence of ZnO in the films, with no impurities or remnants of other materials. The XRD analysis showed a polycrystalline nature of the films and identified a pure phase formation of the hexagonal wurtzite structure. The average crystallite size calculated from the diffraction peaks is ∼43.25 nm. The calculated crystal tensile strain is 1.954 × 10−3, which increases the crystal volume by 0.728% compared with the crystal volume of standard ZnO. The calculated crystal parameters are a = b = 3.258 Å and c = 5.217 Å. The calculated dislocation density (d) and bond length Zn–O (L) are 5.35 × 10−4 nm−2 and 2.695 Å, respectively. Ultraviolet-visible absorption spectra showed an optical band gap of ∼3.80 eV.

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Section: Discussionmentioning

confidence: 89%

Morphological, Structural, and Optical Bandgap Characterization of Extracted ZnO Nanoparticles from Commercial Paste

Nabil

Perez-Quintana

Acosta

et al. 2021

Advances in Materials Science and Engineering

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“…Compared with other adsorbents such as nanomaterials, eggshell can be slower and harder to recover in its original form 10,[58][59][60] . A comparison is almost impossible due to the different base materials of the adsorbents as well as different contaminants and processing conditions.…”

Section: Possible Adsorption Mechanismmentioning

confidence: 99%

Adsorption of Remazol Brilliant Violet-5R Textile Dye from Aqueous Solutions by Using Eggshell Waste Biosorbent

Rápó

Aradi

Szabó

et al. 2020

Sci Rep

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Based on the well-known excellent adsorbent ability of chicken eggshells, the adsorptive capacity and mechanism of Remazol Brilliant Violet-5R (RBV-5R) dye by eggshell was investigated. Exploiting the high surface-area-to-volume ratio and porous structure of this natural adsorbent, the developed procedure showed to be useful for the efficient adsorption of RBV-5R dye from contaminated water. The protocol was thoroughly optimized by investigating the effect of the dye concentration, biomasscontaminated water ratio, particle size of the adsorbent, pH and temperature, as they are key factors in the efficiency of the dye removal process. The eggshell material was characterized by different types of microscopy techniques (stereo, polarization, SEM) as well as elemental analysis (element distribution mapping, EDX), Raman spectroscopy and BET-surface density measurements. EDX, FTIR and Raman spectroscopy proved the presence of the adsorbed dye on the surface of the biomaterial. It was shown that under optimal conditions, the environmentally friendly and inexpensive eggshell could be a reliable adsorbent for Remazol dye removal from wastewater. One of today's global challenges is to supply healthy, pure and consumable water to safeguard public health since a growing variety of toxic organic and inorganic pollutants are occurring in water bodies 1. According to the 2015 World Water Development Report, the demand for water around the world will increase by 55% over the next 15 years, indicating that the Earth's current water supplies can cover only 60% of our future needs by 2030 2. With rapid industrial development, the overexploitation of natural resources, industrial and natural disasters, the number of polluted water sites contaminated with heavy metals 3-6 , radioactive elements 7,8 , nitrite 9,10 , phosphate 11,12 , pesticides 13 , dyes 14-16 , etc., are continuously increasing. Dyes are widely utilized in the paper, pulp, paint and textile industries, with a large amount of water demand for washing and cleaning purposes. Based on the Colour Index, currently, more than 10 000 various types of synthetic dyes are available worldwide. In 2014, more than 1.5 million tons of dyes were produced annually. Fifty percent of these dyes are used by the textile industry, where during the colouring process, 1-10% of these dyes are discharged 17,18. Due to the high solubility and low biodegradability of these compounds, dye-polluted industrial wastewater is one of the most difficult types of wastewater to clean. Remazol Brilliant Violet-5R (RBV-5R), a reactive dye, is used to colour cellulosic fibres. After the colorization process, approximately 10-50% of the initial dye load remains unused 19. Biosorption is a promising method for removing persistent compounds, i.e., non-biodegradable compounds. Recently, various materials such as nanocomposites, households and industrial wastes have been used as biosorbents for inorganic and organic contaminant removal 5,11,20,21. Coconut residual fibres 22 , low-cost activated charcoal from to...

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“…Influence of initial concentration and temperature on ammonium adsorption is shown in Figure 6. With the increase of initial NH 4 + concentration, adsorption capacity first increased and then reached a plateau which represents the maximum sorption capacity of the adsorbent [20]. At low initial concentration (less than 75 mg/L), the adsorption is positively correlated to the NH 4 + concentration.…”

Section: Resultsmentioning

confidence: 99%

Green synthesis of fly ash‐based zeolite Y by mixed alkali fusion method

Shi

Chang

2021

Micro & Nano Letters

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A solvent-free process was used to synthesize high-purity zeolite Y from fly ash. Different from the traditional two-step method, fly ash was activated efficiently by mixed alkali of NaOH and Na 2 CO 3 at 750 • C for 2 h. For prepared zeolite Y, the composition, phase structure, morphology, specific surface areas and ammonium adsorption were evaluated comprehensively. The results show that a single phase zeolite Y with octahedral structure and an average diameter of 2.5 µm is obtained. The Brunauer-Emmett-Teller surface area is as high as 503.34 m 2 /g. Ammonium adsorption isotherm model on obtained zeolite Y was more consistent with the Langmuir model (R 2 > 0.99). And the maximum adsorption capacity is 18.6 mg/g. It can be concluded that the study provides an economic process to utilize fly ash for the synthesis of zeolite Y, which is an excellent adsorbent to remove ammonium. In addition, this study provides an eco-friendly approach to synthesize lowcost zeolite Y from solid waste, which is of excellent adsorption for ammonium removal.

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Efficient toxic nitrite monitoring and removal from aqueous media with ligand based conjugate materials

Cited by 174 publications

References 110 publications

Morphological, Structural, and Optical Bandgap Characterization of Extracted ZnO Nanoparticles from Commercial Paste

Morphological, Structural, and Optical Bandgap Characterization of Extracted ZnO Nanoparticles from Commercial Paste

Adsorption of Remazol Brilliant Violet-5R Textile Dye from Aqueous Solutions by Using Eggshell Waste Biosorbent

Green synthesis of fly ash‐based zeolite Y by mixed alkali fusion method

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