Recent update on photocatalytic degradation of pollutants in waste water using TiO2-based heterostructured materials

Madkhali, Nawal; Prasad, Ch. Durga; Malkappa, Kuruma; Choi, Hyeong Yeol; Govinda, V.; Bahadur, Indra; AbuMousa, Rasha A.

doi:10.1016/j.rineng.2023.100920

Cited by 88 publications

(12 citation statements)

References 152 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The optimal responses achieved for this w 25.58% COD removal and 66.88% turbidity removal. This is possibly due to TiO2 not be photoexcited by visible light due to its large energy band gap [22], and this is in line w the literature [45]. Due to turbidity caused by TiO2 particles, additional post-treatm It was also determined, according to the South African National Standards (SANS) 241 and the South African wastewater and industrial effluent law (2013), that the COD output parameter (498 mg/L) met the standards, whilst the turbidity output parameter (15.3 NTU) did not.…”

Section: Comparative Study Between Uv and Vis Lightsupporting

confidence: 86%

“…The optimal responses achieved for this were 25.58% COD removal and 66.88% turbidity removal. This is possibly due to TiO 2 not being photoexcited by visible light due to its large energy band gap [22], and this is in line with the literature [45]. Due to turbidity caused by TiO 2 particles, additional post-treatment separation methods are required.…”

Section: Comparative Study Between Uv and Vis Lightsupporting

confidence: 75%

See 1 more Smart Citation

Turbidity and COD Removal from Municipal Wastewater Using a TiO2 Photocatalyst—A Comparative Study of UV and Visible Light

et al. 2023

View full text Add to dashboard Cite

Water resources are depleting, and the availability and supply of clean, potable water are a global concern. Advanced oxidation processes (AOPs) possess immense prospects in water and wastewater treatment settings. This study investigated and optimized the photocatalytic treatment of wastewater using titanium dioxide (TiO2) as the photocatalyst. The one-factor-at-a-time (OFAT) technique was employed to evaluate the effects of reaction time (20–100 min), mixing speed (20–100 rpm), and catalyst load (0.3–1.5 g/L) on pH, colour, turbidity, and chemical oxygen demand (COD) removal from actual municipal wastewater. Reaction time and catalyst load were then identified as the two key factors selected to be modeled and were optimized for turbidity and COD removal using the Central Composite Design (CCD) of response surface methodology (RSM). These statistical models were developed and used to optimize the operating conditions. The results obtained showed a desirability efficiency of 74.7% at a 95% confidence level. The RSM model predicted results at the optimum conditions and showed reasonable agreement with the experimental results obtained. The optimal responses achieved were 32.64% COD removal and 95.17% turbidity removal. A comparative study between UV light and visible light was also conducted at optimum conditions, whereby the UV light was demonstrated to be highly effective for turbidity and COD removal. The optimal responses achieved were 25.58% COD removal and 66.88% turbidity removal for visible light.

show abstract

Section: Comparative Study Between Uv and Vis Lightsupporting

confidence: 86%

Section: Comparative Study Between Uv and Vis Lightsupporting

confidence: 75%

Turbidity and COD Removal from Municipal Wastewater Using a TiO2 Photocatalyst—A Comparative Study of UV and Visible Light

et al. 2023

View full text Add to dashboard Cite

show abstract

“…In recent times, several reviews 2,8,32,75–125 have been published on the photocatalytic degradation of various dye pollutants in an aquatic medium using different nanomaterials. However, only a few 2–4,77,81,82,86,91,96,102,123,124 focus on the biosynthesized NPs for the dye photodegradation application.…”

Section: Introductionmentioning

confidence: 99%

A pragmatic review on photocatalytic degradation of methyl orange dye pollutant using greenly biofunctionalized nanometallic materials: A focus on aquatic body

Emmanuel

Adesibikan

Opatola

et al. 2023

Applied Organom Chemis

View full text Add to dashboard Cite

Water is the source of life. But unfortunately, 80% of wastewater is discharged into the aquatic body untreated globally, of which industry is responsible for 70% of such water abstraction through the discharge of pollutants like methyl orange. According to the WWAP, water pollution kills 100 million individuals, 2 million marine animals, and seabirds yearly, and by 2025, it is forecasted that ~1000 million inhabitants in arid zones will experience severe water crisis, and thus, the security of water has become focal outcry due to daily environmental pollution escalation caused by rapid growth in industries and population. Recently, biosynthesized nanoparticles as photocatalysts have answered the call for sustainable treatment of methyl orange dye effluent through photodegradation because of their efficient photoactivity, inexpensiveness, and eco‐benignness. In this review, photocatalytic‐degradation mechanism and pathways of methyl orange in the aquatic environment in the presence of •OH− and •O2− using green nanoparticles were mechanistically discussed. The highest degradation efficiency was found to be 100%, the final mineralization products were H2O and CO2, and the least degradation time taken was 2 min with silver nanoparticles being the most commonly used degrader and plant extracts being the most commonly employed bioreductant for the biosynthesis of nanoparticles.

show abstract

“…Mechanochemical methods are considered as promising approach for the synthesis of semiconductor-semiconductor composite catalysts to obtain nano-scale powder with homogeneous mixture. [29][30][31][32][33] An overview on these various subjects and a state of the art in relation to these topics are provided in this review as well. In the first section, an overview of the different types of environmental pollution is presented with the occurrence of pharmaceuticals in water resources.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, reducing TiO 2 to sub‐stochiometric Ti n O 2n–1 can be an effective solution to promote the properties of titanium dioxide. Mechanochemical methods are considered as promising approach for the synthesis of semiconductor‐semiconductor composite catalysts to obtain nano‐scale powder with homogeneous mixture [29–33] …”

Section: Introductionmentioning

confidence: 99%

A Comprehensive Review on Modification of Titanium Dioxide‐Based Catalysts in Advanced Oxidation Processes for Water Treatment

Tanos,

Razzouk,

Lesage

et al. 2023

ChemSusChem

View full text Add to dashboard Cite

It has become necessary to develop effective strategies to prevent and reduce water pollution as a result of the increase in dangerous pollutants in water reservoirs. Consequently, there is a need to design new catalyst materials to promote the efficiency of advanced oxidation processes (AOPs) in the field of wastewater treatment plant to ensure the mineralization of trace organic contaminants. A notable approach gaining attention involves the coupling of sulfate radicals‐based AOPs to photocatalysis or electrocatalysis processes, aiming to achieve the complete removal of refractory contaminants into water and carbon dioxide. Titanium dioxide as metal oxide has received great attention for its catalytic application in water purification. TiO2 catalysts offer a multitude of advantages in AOPs. They are characterized by their high photocatalytic activity under both ultraviolet and visible light, making them environmentally friendly due to the absence of toxic byproducts during oxidation. Their versatility is remarkable, finding utility in various AOPs, from photocatalysis to photo‐Fenton processes. TiO2′s durability ensures long‐lasting catalytic activity, which is crucial for continuous treatment processes, and their cost‐effectiveness is particularly advantageous. Furthermore, their chemical stability allows it to withstand varying pH conditions. However, the large band gap energy and low electrical conductivity hinder the catalytic reaction effectiveness. This review aims to examine various approaches to enhance the catalytic performance of titanium dioxide, with the objective of enabling more efficient water purification methods.

show abstract

Recent update on photocatalytic degradation of pollutants in waste water using TiO2-based heterostructured materials

Cited by 88 publications

References 152 publications

Turbidity and COD Removal from Municipal Wastewater Using a TiO2 Photocatalyst—A Comparative Study of UV and Visible Light

Turbidity and COD Removal from Municipal Wastewater Using a TiO2 Photocatalyst—A Comparative Study of UV and Visible Light

A pragmatic review on photocatalytic degradation of methyl orange dye pollutant using greenly biofunctionalized nanometallic materials: A focus on aquatic body

A Comprehensive Review on Modification of Titanium Dioxide‐Based Catalysts in Advanced Oxidation Processes for Water Treatment

Contact Info

Product

Resources

About