Removal of Dyes from Water Using a TiO2 Photocatalyst Supported on Black Sand

Bowden, Derek; Brimblecombe, Peter

doi:10.1007/s11270-008-9841-6

Cited by 22 publications

(10 citation statements)

References 26 publications

(34 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Additionally, the use of mesoporous materials, like zeolite as a support for these series of semiconductors, has recently become the focus of intensive research on vat dye photodecolorization, due to the fact that the semiconductor support influences the photocatalytic efficiency through structural features, and the interaction between the vat dyes leads to the enhancement of contact between the surface, and irradiation likewise decreases with the amount of semiconductor required [179]. Thus, there are some studies focused on the importance of semiconductor supported zeolite for vat dye photodegradation, including Co-ZSM-5, TiO 2 -HZSM-5, Fe-exchange zeolite, and CuO-X zeolite [180, 181]. …”

Section: Photocatalytic Decolorization Of Synthetic Dyesmentioning

confidence: 99%

Recent Advances in Heterogeneous Photocatalytic Decolorization of Synthetic Dyes

Julkapli

Bagheri

Hamid

2014

The Scientific World Journal

282

View full text Add to dashboard Cite

During the process and operation of the dyes, the wastes produced were commonly found to contain organic and inorganic impurities leading to risks in the ecosystem and biodiversity with the resultant impact on the environment. Improper effluent disposal in aqueous ecosystems leads to reduction of sunlight penetration which in turn diminishes photosynthetic activity, resulting in acute toxic effects on the aquatic flora/fauna and dissolved oxygen concentration. Recently, photodegradation of various synthetic dyes has been studied in terms of their absorbance and the reduction of oxygen content by changes in the concentration of the dye. The advantages that make photocatalytic techniques superior to traditional methods are the ability to remove contaminates in the range of ppb, no generation of polycyclic compounds, higher speed, and lower cost. Semiconductor metal oxides, typically TiO2, ZnO, SnO, NiO, Cu2O, Fe3O4, and also CdS have been utilized as photocatalyst for their nontoxic nature, high photosensitivity, wide band gap and high stability. Various process parameters like photocatalyst dose, pH and initial dye concentrations have been varied and highlighted. Research focused on surface modification of semiconductors and mixed oxide semiconductors by doping them with noble metals (Pt, Pd, Au, and Ag) and organic matter (C, N, Cl, and F) showed enhanced dye degradation compared to corresponding native semiconductors. This paper reviews recent advances in heterogeneous photocatalytic decolorization for the removal of synthetic dyes from water and wastewater. Thus, the main core highlighted in this paper is the critical selection of semiconductors for photocatalysis based on the chemical, physical, and selective nature of the poisoning dyes.

show abstract

Section: Photocatalytic Decolorization Of Synthetic Dyesmentioning

confidence: 99%

Recent Advances in Heterogeneous Photocatalytic Decolorization of Synthetic Dyes

Julkapli

Bagheri

Hamid

2014

The Scientific World Journal

282

View full text Add to dashboard Cite

show abstract

“…For instance, it has been used to remove undesirable organic contaminants which dissolved in air and water. Additionally, in focus of water treatment, TiO 2 has been mainly used in the form of suspension or in the form of thin film Chang, Wu & Zhu 2000;Chen & Zhao 1999;Gad-Allah et al 2009;Hurum et al 2003;Kwon et al 2008;Luo, Bowden & Brimblecombe 2009;Noorjahan et al 2003;Rashed & El-Amin 2007;Samarghandi et al 2007;Theron et al 2001;Watson, Beydoun & Amal 2002;Zainudin, Abdullah & Mohamed 2008).…”

Section: Magnetised Tiomentioning

confidence: 99%

Magnetised titanium dioxide (TiO2) for water purification: preparation, characterisation and application

Shahid

McDonagh

Kim

et al. 2015

Desalination and Water Treatment

View full text Add to dashboard Cite

The study of titanium dioxide (TiO 2 ) as a photocatalyst for water purification has attracted significant attention over the past four decades. However, the separation of photocatalyst from water suspension may be difficult, costly and jeopardize the use of this water treatment technology. Recently, the development and production of magnetised TiO 2 have been achieved to offer a solution for the photocatalyst separation problem. This paper discusses the preparation techniques, characterisation and the applications of magnetised TiO 2 . Many researchers have studied magnetised TiO 2 photocatalysts but the lack of articles discussing the water purification processes is still slowing any advance in this field. Here, the progress of the scientific research on preparation techniques to coat magnetic particles by materials such as organic polymers, silica, magnesia and alumina are reviewed to compare and discuss recent findings. The doping of photoactive TiO 2 photocatalyst into the magnetic coated particles is also emphasised. In addition, the characterisation of magnetised TiO 2 in terms of physicochemical properties and operating conditions produced by each technique are critically reviewed. Moreover, examples of applications of TiO 2 and magnetised TiO 2 photocatalyst in water purification are summarised. In general, the effectiveness of organic removal by magnetised TiO 2 is still lower compared to single phase TiO 2 . The future prospect of this field is deliberated to develop a novel, economic and efficient magnetised TiO 2 photocatalyst, which has high organic removal properties.

show abstract

“…More than 1000 substances have been tested [2]. Advanced oxidation using TiO 2 offer potential treatment opportunities for: tertiary treatment of municipal wastewater [3,4], for removal of endocrine disrupting chemicals [5][6][7] and disinfection [8,9], especially effluents containing pathogens resistant to chlorination [10][11][12][13][14][15][16]; treatment of hazardous effluents from hospitals [17,18]; industrial effluents from pulp and paper [19][20][21][22], dairy manufacturing [23], textile dyeing [24][25][26][27][28][29][30][31], agricultural oil mills and distilleries [32,33], and pharmaceutical industry [34][35][36][37]; wastewater effluents containing phenols [38][39][40][41] and chlorophenols [42,43], herbicides and pesticides [44][45][46], ammonia [4...…”

Section: Introductionmentioning

confidence: 99%

TiO2 Solar Photocatalytic Reactor Systems: Selection of Reactor Design for Scale-up and Commercialization—Analytical Review

2016

View full text Add to dashboard Cite

For the last four decades, viability of photocatalytic degradation of organic compounds in water streams has been demonstrated. Different configurations for solar TiO 2 photocatalytic reactors have been used, however pilot and demonstration plants are still countable. Degradation efficiency reported as a function of treatment time does not answer the question: which of these reactor configurations is the most suitable for photocatalytic process and optimum for scale-up and commercialization? Degradation efficiency expressed as a function of the reactor throughput and ease of catalyst removal from treated effluent are used for comparing performance of different reactor configurations to select the optimum for scale-up. Comparison included parabolic trough, flat plate, double skin sheet, shallow ponds, shallow tanks, thin-film fixed-bed, thin film cascade, step, compound parabolic concentrators, fountain, slurry bubble column, pebble bed and packed bed reactors. Degradation efficiency as a function of system throughput is a powerful indicator for comparing the performance of photocatalytic reactors of different types and geometries, at different development scales. Shallow ponds, shallow tanks and fountain reactors have the potential of meeting all the process requirements and a relatively high throughput are suitable for developing into continuous industrial-scale treatment units given that an efficient immobilized or supported photocatalyst is used.

show abstract

Removal of Dyes from Water Using a TiO2 Photocatalyst Supported on Black Sand

Cited by 22 publications

References 26 publications

Recent Advances in Heterogeneous Photocatalytic Decolorization of Synthetic Dyes

Recent Advances in Heterogeneous Photocatalytic Decolorization of Synthetic Dyes

Magnetised titanium dioxide (TiO2) for water purification: preparation, characterisation and application

TiO2 Solar Photocatalytic Reactor Systems: Selection of Reactor Design for Scale-up and Commercialization—Analytical Review

Contact Info

Product

Resources

About