Dye Pollution in Water and Wastewater

Maheshwari, Karishma; Agrawal, Madhu; Gupta, Akhilendra Bhushan

doi:10.1007/978-981-16-2892-4_1

Cited by 67 publications

(26 citation statements)

References 71 publications

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“…Toxins are extracted from wastewater in different ways by each approach. Major methods include 1) Chemical methods such as chlorination and ozonation, 2) Physical methods such as ultra-filtration, adsorption, reverse osmosis and ion exchange, 3) Biological methods such as aerobic as well as anaerobic treatments ( Maheshwari et al, 2021 ). The majority of the traditional approaches just change the phase of chemicals without transforming them into eco-friendly products.…”

Section: Introductionmentioning

confidence: 99%

Perovskite LaNiO3/Ag3PO4 heterojunction photocatalyst for the degradation of dyes

et al. 2022

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Pristine lanthanum nickelate (LaNiO3), silver phosphate (Ag3PO4) and perovskite lanthanum nickelate silver phosphate composites (LaNiO3/Ag3PO4) were prepared using the facile hydrothermal method. Three composites were synthesized by varying the percentage of LaNiO3 in Ag3PO4. The physical properties of as-prepared samples were studied by powder X-ray diffraction (pXRD), Fourier-transform infrared (FT-IR), Scanning electron microscopy (SEM) and Energy-dispersive X-ray (EDX). Among all synthesized photocatalysts, 5%LaNiO3/Ag3PO4 composite has been proved to be an excellent visible light photocatalyst for the degradation of dyes i.e., rhodamine B (RhB) and methyl orange (MO). The photocatalytic activity and stability of Ag3PO4 were also enhanced by introducing LaNiO3 in Ag3PO4 heterojunction formation. Complete photodegradation of 50 mg/L of RhB and MO solutions using 25 mg of 5%LaNiO3/Ag3PO4 photocatalyst was observed in just 20 min. Photodegradation of RhB and MO using 5%LaNiO3/Ag3PO4 catalyst follows first-order kinetics with rate constants of 0.213 and 0.1804 min−1, respectively. Perovskite LaNiO3/Ag3PO4 photocatalyst showed the highest stability up to five cycles. The photodegradation mechanism suggests that the holes (h+) and superoxide anion radicals O2 •− plays a main role in the dye degradation of RhB and MO.

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Section: Introductionmentioning

confidence: 99%

Perovskite LaNiO3/Ag3PO4 heterojunction photocatalyst for the degradation of dyes

et al. 2022

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“…The existence of different textile dyes in water resources caused harmful effects on living organism life. The dyes are extensively used by small-scale to large-scale industries, with the production of 1,000,000 tons world widely (Maheshwari et al, 2021;Tkaczyk et al, 2020).…”

Section: Textiles Dyes Removalmentioning

confidence: 99%

Applications of graphitic carbon nitride-based S-scheme heterojunctions for environmental remediation and energy conversion

Sudhaik

SONU

Hasija

et al. 2023

Nanofab

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The contemporary era's top environmental problems include the lack of energy, recycling of waste resources, and water pollution. Due to the speedy growth of modern industrialization, the utilization of non-renewable sources has increased rapidly, which has caused many serious environmental and energy issues. In photocatalysis, as a proficient candidate, g-C3N4 (metal-free polymeric photocatalyst) has gained much attention due to its auspicious properties and excellent photocatalytic performance. But, regrettably, the quick recombination of photoinduced charge carriers, feeble redox ability, and inadequate visible light absorption are some major drawbacks of g-C3N4 that hamper its photocatalytic ability. Henceforth, these significant limitations can be solved by incorporating modification strategies. Among all modification techniques, the amalgamation of g-C3N4 with two or more photocatalytic semiconducting materials via heterojunction formation is more advantageous. In this review, we have discussed various modification strategies, including conventional, Z-scheme and S-scheme heterojunctions. S-scheme heterojunction is consideredan efficient and profitable charge transferal pathway due to the excellent departure and transferal of photoexcited charge carriers with outstanding redox ability. Consequently, the current review is focused on various photocatalytic applications of S-scheme-based g-C3N4 photocatalysts in pollutant degradation, H2 production, and CO2 reduction.

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“…Acute exposure to TPMs causes carcinogenicity, mutagenicity and associated serious health problems in humans, animals and aquatic life (Maheshwari et al, 2021;Liu et al, 2021;Al Prol, 2019). A major and inevitable consequence of water contamination is the polluted agriculture sector.…”

Section: Tpms -Applications and Consequencesmentioning

confidence: 99%

Microbial remediation of triphenylmethane dyes contaminated wastewater: A review

Jabeen¹,

Rasool

2021

PJBB

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Extensive dependence of textile and other industries on the synthetic dyes have made these chemicals a necessary evil nowadays. Among all classes of dyes, triphenylmethane dyes (TPMs) are most common and unfortunately most hazardous. The wastewater originated from various industries is usually found to contain a major portion of TPMs along-with other synthetic dyes, inorganic and organic contaminant which lead to serious environmental consequences. In this regard, microbial remediation of such synthetic chemicals seems to be a very robust, cost effective and environment friendly strategy. Microbial remediation exploits the enzymatic capabilities of microorganisms (bacteria, fungi or microalgae) to cope with recalcitrant synthetic dyes and other chemicals. The remediation of TPMs can occur either by the phenomenon of adsorption onto the microbial systems or through the degradation by the enzymatic or metabolic mechanisms of the microbe under optimized conditions. Both of the two ways convert the toxic chemicals to harmless and friendly products. Biodegradation or bioremediation of pollutants can be achieved through various living organisms such as plants and algae. But the current review only focuses on the remediation of TPMs by microbes such as bacteria, yeast and fungi. The factors such as pH, temperature, inoculum size, dye concentration etc. which have profound effect on optimization of degradation of TPMs, can never be neglected and hence they are discussed in detail in the present study. In this way we claim that the present article will provide deep insights into the current consequences of TPMs and related toxicants being added to our environment. Further, an emphasis on the implementation of bioremediation to get rid of such chemicals from our waters would be helpful to enhance the interest of researchers and scientists already working on the same theme.

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Dye Pollution in Water and Wastewater

Cited by 67 publications

References 71 publications

Perovskite LaNiO3/Ag3PO4 heterojunction photocatalyst for the degradation of dyes

Perovskite LaNiO3/Ag3PO4 heterojunction photocatalyst for the degradation of dyes

Applications of graphitic carbon nitride-based S-scheme heterojunctions for environmental remediation and energy conversion

Microbial remediation of triphenylmethane dyes contaminated wastewater: A review

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