Arsenic: Toxic Effects and Remediation

Siddiqui, Sharf Ilahi

doi:10.1002/9781119407805.ch1

Cited by 10 publications

(6 citation statements)

References 138 publications

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“…Dyes have been detected in industrial effluents at varying concentrations, with general reports of 10–50 mg/L of dyes detected in effluents and reports of up to 300 mg/L from textile effluents [ 4 , 5 ]. It is difficult to quantify the amount of global dye consumption, but it is estimated that 700,000 tons of synthetic dyes are produced per year [ 6 ]. Regardless, the presence of dyes in wastewater is a pervasive issue that has led to safety concerns surrounding their discharge into the environment [ 6 ].…”

Section: Introductionmentioning

confidence: 99%

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Morphological and Behavioral Effects in Zebrafish Embryos after Exposure to Smoke Dyes

Mary

Wooley

et al. 2021

Toxics

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Solvent Violet 47 (SV47) and Disperse Blue 14 (DB14) are two anthraquinone dyes that were previously used in different formulations for the production of violet-colored smoke. Both dyes have shown potential for toxicity; however, there is no comprehensive understanding of their effects. Zebrafish embryos were exposed to SV47 or DB14 from 6 to 120 h post fertilization (hpf) to assess the dyes’ potential adverse effects on developing embryos. The potential ability of both dyes to cross the blood–brain barrier was also assessed. At concentrations between 0.55 and 5.23 mg/L, SV47 showed a dose-dependent increase in mortality, jaw malformation, axis curvature, and edemas. At concentrations between 0.15 and 7.54 mg/L, DB14 did not have this same dose-dependence but had similar morphological outcomes at the highest doses. Nevertheless, while SV47 showed significant mortality from 4.20 mg/L, there was no significant mortality on embryos exposed to DB14. Regardless, decreased locomotor movement was observed at all concentrations of DB14, suggesting an adverse neurodevelopmental effect. Overall, our results showed that at similar concentrations, SV47 and DB14 caused different types of phenotypic effects in zebrafish embryos.

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Section: Introductionmentioning

confidence: 99%

“…It is difficult to quantify the amount of global dye consumption, but it is estimated that 700,000 tons of synthetic dyes are produced per year [ 6 ]. Regardless, the presence of dyes in wastewater is a pervasive issue that has led to safety concerns surrounding their discharge into the environment [ 6 ].…”

Section: Introductionmentioning

confidence: 99%

Morphological and Behavioral Effects in Zebrafish Embryos after Exposure to Smoke Dyes

Mary

Wooley

et al. 2021

Toxics

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“…Furthermore, it is not biodegradable, which makes it necessary to have effective strategies for its disposal and removal from wastewater. Fortunately, Rose Bengal is light-sensitive, particularly to visible and UV wavelengths, rendering it prone to photodegradation [7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Heterojunction-Based Photocatalytic Degradation of Rose Bengal Dye via Gold-Decorated α-Fe2O3-CeO2 Nanocomposites under Visible-Light Irradiation

Alshammari,

Kosa,

Patel

et al. 2024

Water

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Developing photocatalytic nanomaterials with unique physical and chemical features using low-cost and eco-friendly synthetic methods is highly desirable in wastewater treatment. In this work, the magnetically separable α-Fe2O3-CeO2 nanocomposite (NC), with its respective metal oxides of α-Fe2O3 and CeO2 nanoparticles, was synthesized using a combination of hexadecyltrimethylammonium bromide (CATB) and ascorbic acid via the hydrothermal method. To tune the band gap, the heterojunction nanocomposite of α-Fe2O3-CeO2 was decorated with plasmonic Au nanoparticles (Au NPs). The various characterization methods, such as FTIR, UV-vis DRS, XRD, XPS, TEM, EDX, SEM, and PL, were used to determine the properties of the materials, including their morphology, elemental composition, optical properties, band gap energy, and crystalline phase. The nanocomposite of α-Fe2O3-CeO2@Au was utilized to remove Rose Bengal (RB) dye from wastewater using a photocatalytic technique when exposed to visible light. A comprehensive investigation of the impact of the catalyst concentration and initial dye concentration was conducted to establish the optimal photodegradation conditions. The maximum photocatalytic efficiency of α-Fe2O3-CeO2@Au (50 mg L−1) for RB (20 ppm) dye removal was found to be 88.9% in 120 min under visible-light irradiation at a neutral pH of 7 and 30 °C. Various scavengers, such as benzoquinone (BQ; 0.5 mM), tert-butyl alcohol (TBA; 0.5 mM), and ethylenediaminetetraacetic acid (EDTA; 0.5 mM), were used to investigate the effects of different free radicals on the photocatalytic process. Furthermore, the reusability of the α-Fe2O3-CeO2@Au photocatalyst has also been explored. Furthermore, the investigation of the potential mechanism demonstrated that the heterojunction formed between α-Fe2O3 and CeO2, in combination with the presence of deposited Au NPs, led to an enhanced photocatalytic efficiency by effectively separating the photogenerated electron (e−)–hole (h+) pairs.

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“…One of the major threats to natural ecosystems is the environmental pollution arising from urbanization and industrialization [1][2][3]. In particular, metal ions are released as a result of various human activities, causing a variety of negative environmental consequences [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Sequestration of Toxic Metal Ions from Industrial Effluent Using the Novel Chelating Resin Tamarind Triazine Amino Propanoic Acid (TTAPA)

Mandal

Abomuti

Al‐Harbi

et al. 2023

Water

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Due to higher levels of industrial activity, the concentrations of toxic substances in natural water bodies are increasing. One of the most dangerous groups of toxic compounds is heavy metals, with even trace amounts of most heavy metals being harmful to aquatic life. This is why purifying water has become an urgent priority. In this context, ion-exchange resins have become more widely used in water treatment processes. However, to reduce the costs and improve the sustainability of this strategy, natural resins are favored over synthetic versions. Therefore, in the present study, a natural tamarind-based chelating resin was developed. The tamarind triazine amino propanoic acid (TTAPA) resin was synthesized and characterized using Fourier-transform infrared spectroscopy, thermogravimetry analysis, scanning electron microscopy, elemental analysis, and physicochemical analysis of the moisture content, total ion-exchange capacity, bulk volume, bulk density, and percentage nitrogen content. The biological oxygen demand and chemical oxygen demand of the industrial effluent before and after treatment were also analyzed. The batch analysis was used to determine the distribution coefficient and percentage removal of the metal ions Fe(II), Zn(II), Pb(II), Cu(II), and Cd(II). The removal efficiency of the prepared TTAPA resin was highest for Fe(II), followed by Cu(II), Zn(II), Pb(II), and Cd(II) in order. The chelating ion-exchange resin also had a metal ion recovery of more than 95%, thus demonstrating great promise for the sequestration of heavy metal ions from industrial wastewater. The proposed TTAPA resin is biodegradable, non-toxic, cost-effective, reproducible, and eco-friendly.

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Arsenic: Toxic Effects and Remediation

Cited by 10 publications

References 138 publications

Morphological and Behavioral Effects in Zebrafish Embryos after Exposure to Smoke Dyes

Morphological and Behavioral Effects in Zebrafish Embryos after Exposure to Smoke Dyes

Heterojunction-Based Photocatalytic Degradation of Rose Bengal Dye via Gold-Decorated α-Fe2O3-CeO2 Nanocomposites under Visible-Light Irradiation

Sequestration of Toxic Metal Ions from Industrial Effluent Using the Novel Chelating Resin Tamarind Triazine Amino Propanoic Acid (TTAPA)

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