Toxicity study of UV/ZnO treated solution containing Reactive blue 29 using Daphnia magna as a biological indicator

Dehghani, Mohammad Hadi; Mahmoodi, Masoumeh; Zarei, Ahmad

doi:10.1016/j.mex.2019.03.019

Cited by 5 publications

(4 citation statements)

References 14 publications

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“…According to Khan and Malik (2018), textile dyes and the breakdown products of certain dyes like Malachite green (Zhou et al, 2019) are carcinogenic and have been linked to various diseases in plants, animals, and humans. This toxicity effect can last for a long period of time since most dyes are made up of stable aromatic compounds; thus, they are resistant to biodegradation (Dehghani et al, 2019). In a study performed by Gita et al (2019) Triphenylmethane dyes such as methyl violet (MV) and brilliant green (BG) are reported to cause gastrointestinal tract and respiratory problems in humans.…”

Section: Textile Dyesmentioning

confidence: 99%

Recent methods in the production of activated carbon from date palm residues for the adsorption of textile dyes: A review

Alharbi

Hameed

Alotaibi

et al. 2022

Front. Environ. Sci.

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Textile dyes are organic compounds that can pose an environmental threat if not properly treated. They can cause many problems ranging from human health, ecosystem disturbances, and the reduction of the esthetic value of water bodies. The adsorption process using activated carbon (AC) has been proven to be effective in treating dyes in wastewater. However, the production of AC is limited by the non-renewables and relatively expensive precursor of coal. Date palm residues (DPRs) provide a good alternative for AC’s precursor due to their continuous supply, availability in a large amount, and having good physiochemical properties such as high oxygen element and fixed carbon. This study provides a review of the potential of date palm residues (DPRs) as AC in adsorbing textile dyes and the recent technological advances adopted by researchers in producing DPR-based AC. This review article focuses solely on DPR and not on other biomass waste. This study presents a background review on date palms, textile dyes, biochar, and AC, followed by production methods of AC. In the literature, DPR was carbonized between 250 and 400°C. The conventional heating process employed an activation temperature of 576.85–900°C for physical activation and a maximum of 800°C for physicochemical activation. Chemical agents used in the chemical activation of DPR included NaOH, KOH, ZnCl2, H3PO4, and CaCl2. The maximum surface area obtained for DPR-AC was 1,092.34 and 950 m2/g for physical and chemical activation, respectively. On the other hand, conditions used in microwave heating were between 540 and 700 W, which resulted in a surface area of 1,123 m2/g. Hydrothermal carbonization (HTC) utilized carbonization temperatures between 150 and 250°C with pressure between 1 and 5 MPa, thus resulting in a surface area between 125.50 and 139.50 m2/g. Isotherm and kinetic models employed in the literature are also discussed, together with the explanation of parameters accompanied by these models. The conversion of DPR into AC was noticed to be more efficient with the advancement of activation methods over the years.

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Section: Textile Dyesmentioning

confidence: 99%

Recent methods in the production of activated carbon from date palm residues for the adsorption of textile dyes: A review

Alharbi

Hameed

Alotaibi

et al. 2022

Front. Environ. Sci.

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“…Consequently, recalcitrant compounds, such as polyvinyl alcohol, reactive dyes, dispersive dyes, aromatic amines, and amino‐naphthalene‐sulfonic acids, are usually present in the dyeing wastewater (Q. Chen et al, 2021; Sen et al, 2019). These dyes have stable chemical structures, which makes them resistant to micro‐biodegradation (Dehghani et al, 2019). Among different classes of dyes, ~60% of them belong to azo group (Dai et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

“…Chen et al, 2021;Sen et al, 2019). These dyes have stable chemical structures, which makes them resistant to micro-biodegradation (Dehghani et al, 2019). Among different classes of dyes, $60% of them belong to azo group (Dai et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Study on the catalytic degradation of Acid Orange 7 and the potential mechanism by ferrous–percarbonate

Huang

Wang

Ruan

2022

Water Environment Research

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Factors affecting the degradation of Acid Orange 7 (AO7) were evaluated and optimized when ferrous was used to catalyze percarbonate in the present study. The optimized conditions included the initial pH values ranging from 3 to 11 for AO7 solution, the initial level of AO7, sodium percarbonate (SPC), and Fe 2+ . Some ions and natural organic materials, which commonly exist in natural water, were also tested to evaluate their potential impacts on the degradation of AO7. The degradation efficiency of AO7 was up to 95% under the optimized test conditions, where the ferrous/percarbonate/AO7 molar ratio was 15/10/1 in the 0.285 mmol/l AO7 aqueous solution. The presence of Cl À , SO 4 2À , NO 3 À , Na + , and Mg 2+ did not affect the removal of AO7. The addition of HCO 3 À significantly inhibited its removal, even when the concentration of HCO 3 À was low to 0.6 mmol/l. A slight inhibition effect was observed when the added concentration of humic acid ranged from 0.5 to 5 mg/l, whereas the residue of AO7 was significantly enhanced when the level of humic acid was continually increased from 50 to 100 mg/l. Hydroxyl radicals (•OH) were the main reactive intermediates controlling the oxidation of AO7 in the present Fe 2+ /SPC system. The produced intermediates through the degradation of AO7 were identified to include 2-coumaranone, 2-naphthol, phthalic acid, phthalimide, N-methylnaphthylamine, and 2-methylphenol. The proposed degradation pathways are consistent with the radical formation and the identified intermediates. Practitioner Points• The ferrous/percarbonate system can remove 95% of AO7 under the optimized conditions. • AO7 removal was inhibited by adding HCO 3 À and humic acid, but not affected by Cl À , SO 4 2À , NO 3 À , Na + , and Mg 2+ .• Hydroxylation, ring opening, and mineralization driven by the generated hydroxyl radicals were derived as the major processes for degrading AO7.

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“…Previous studies compared the catalytic activity of ZnO and TiO 2 for the degradation of sulfamethazine and chloramphenicol, respectively, and reported that ZnO was slightly more effective than TiO 2 [22,23]. e performance mechanism of these processes is that the semiconductor material is irradiated with ultraviolet radiation which stimulates the electron from the valence band to the conduction band causing the release of radical hydroxyl [24,25]. According to the studies conducted so far, no report on trifluralin removal using two methods simultaneously including UV/S 2 O 8 2− and UV/ZnO processes have been reported.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Degradation of Trifluralin in Aqueous Solutions by UV/S2O82− and UV/ZnO Processes: A Comparison of Removal Efficiency and Cost Estimation

Sadeghi

Fadaei

Mohammadi‐Moghadam

et al. 2021

International Journal of Chemical Engineering

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Trifluralin is one of the most widely used herbicides, being accounted as the cause of cancer in human. In the present research, the UV/S2O82− and ZnO/UV processes’ efficiency in the removal of trifluralin was investigated. A lab scale equipped with a UV lamp was applied. The parameters were studied, including initial trifluralin concentration (0.4–1.2 mg/L), contact time (20–60 min), S2O82− concentration (20–60 μM), and ZnO concentration (50–150 mg/L). The remained trifluralin concentration was measured by HPLC. This study proved the trifluralin removal of 92.90 ± 1.6% and 87.91 ± 19.22% for UV/S2O82− and UV/ZnO processes in the best operation conditions (contact time of 60 min, the persulfate concentration of 40 μM, and the ZnO concentration of 100 mg/L). The optimal trifluraline concentrations were 1.2 mg/L and 0.6 mg/L for UV/S2O82− and UV/ZnO processes, respectively. In both processes, the removal efficiency of trifluralin increased significantly with increasing contact time. The findings exhibited that both processes UV/S2O82− and UV/ZnO followed the zero-order kinetic. The electrical energy consumed of UV/S2O82 and UV/ZnO was about 43.95 and 20.41 Kwh/kg, respectively. The results show that UV/S2O82− and ZnO/UV processes were appropriate as the effective treatment method for trifluralin removal. Therefore, it is proposed to study the performance of these processes as an environmentally friendly practice in full scale with real wastewater.

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Toxicity study of UV/ZnO treated solution containing Reactive blue 29 using Daphnia magna as a biological indicator

Abstract: Graphical abstract

Cited by 5 publications

References 14 publications

Recent methods in the production of activated carbon from date palm residues for the adsorption of textile dyes: A review

Recent methods in the production of activated carbon from date palm residues for the adsorption of textile dyes: A review

Study on the catalytic degradation of Acid Orange 7 and the potential mechanism by ferrous–percarbonate

Photocatalytic Degradation of Trifluralin in Aqueous Solutions by UV/S2O82− and UV/ZnO Processes: A Comparison of Removal Efficiency and Cost Estimation

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