Studies on the Effect of TiO2 Nano Photocatalysis in the Pretreatment of Seawater Reverse Osmosis Desalination

Jabri, Hasna Al; Shaik, Feroz

doi:10.7763/ijesd.2015.v6.653

Cited by 9 publications

(6 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For this reason, a research effort is underway to discover photocatalysts that can use the sizable visible light power available from the sun. Wide bandgap semiconductor catalysts have been modified in the attempt to harvest visible light and disinfect water, using a variety of techniques: (i) Transition-metal semiconductor doping with 148 (iv) Introduction of organic dyes and polymers sensitive to visible light on the nanostructured catalyst surface; 104 (v) Introduction of defect states in the midbandgap region of the semiconductor; 149 (vi) Addition on plasmonic metal nanoparticles for visible-range surface-plasmon resonance enhanced photo catalysis. 150 Reference.…”

Section: •-mentioning

confidence: 99%

Chlorination disadvantages and alternative routes for biofouling control in reverse osmosis desalination

et al. 2019

View full text Add to dashboard Cite

With an ever-increasing human population, access to clean water for human use is a growing concern across the world. Seawater desalination to produce usable water is essential to meet future clean water demand. Desalination processes, such as reverse osmosis and multi-stage flash have been implemented worldwide. Reverse osmosis is the most effective technology, which uses a semipermeable membrane to produce clean water under an applied pressure. However, membrane biofouling is the main issue faced by such plants, which requires continuous cleaning or regular replacement of the membranes. Chlorination is the most commonly used disinfection process to pretreat the water to reduce biofouling. Although chlorination is widely used, it has several disadvantages, such as formation of disinfection by-products and being ineffective against some types of microbes. This review aims to discuss the adverse effect of chlorination on reverse osmosis membranes and to identify other possible alternatives of chlorination to reduce biofouling of the membranes. Reverse osmosis membrane degradation and mitigation of chlorines effects, along with newly emerging disinfection technologies, are discussed, providing insight to both academic institutions and industries for the design of improved reverse osmosis systems.

show abstract

Section: •-mentioning

confidence: 99%

Chlorination disadvantages and alternative routes for biofouling control in reverse osmosis desalination

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Figure 6 shows the output variable's percentage removal efficiencies, depicted with reaction times. The reaction time steadily grew from 0 to 180 minutes before rapidly decreasing to 300 minutes [13]. TOC and COD increase sharply up to 180 min and decrease at 300 min [2].…”

Section: Effect Of Reaction Timementioning

confidence: 95%

“…During the experiments, it was revealed that the absorbance accuracy of H2O2 is dependent on its concentration. Therefore, the efficiency of the water treatment system increases with H2O2 concentration [13].…”

Section: Introductionmentioning

confidence: 99%

Experimental and Computational Analysis for Optimization of Seawater Biodegradability Using Photo Catalysis

Nayeemuddin,

PALANIANDYA,

Shaik

et al. 2023

IIUMEJ

View full text Add to dashboard Cite

Seawater pollution is a significant global environmental problem. Various technologies and methods have been used to remove the contaminants found in saltwater. This experimental study investigates the degradation of contaminants present in seawater using solar photocatalysis, where a combination of TiO2 and ZnO was used. The effects of catalyst dosage, pH, and reaction duration were assessed using percentage removal efficiencies of total organic carbon (TOC), chemical oxygen demand (COD), biological oxygen demand (BOD), and biodegradability (BOD/COD). Biodegradability is essential for removing pollutants from saltwater and plays a vital role. The higher the biodegradability, the more efficient the treatment procedure will be. The most effective percentage reduction rates from the experimental data obtained were TOC=59.80%, COD=75.20%, BOD=23.94%, and biodegradability=0.055. For modeling, optimizing, and assessing the effects of parameters, the Design Expert based on Box Behnken design (RSM-BBD) and a predictive model based on the MATLAB adaptive neuro-fuzzy inference system (ANFIS) tools were used. The coefficient of determination R2 was found to be 0.977 for the RSM-BBD model and 0.99 for the ANFIS model. According to the RSM-BBD design, the maximum percentage pollutant elimination efficiencies were found to be TOC=55.4, COD=73.4, BOD=23.70%, and BOD/COD=0.054, but for the ANFIS model, they were TOC=59.4, COD=75.4, BOD=24.1%, and BOD/COD=0.055. It was discovered that the ANFIS model outperformed RSM-BBD in process optimization. ABSTRAK: : Pencemaran air laut adalah masalah alam sekitar global yang ketara. Pelbagai teknologi dan kaedah telah digunakan bagi menyingkirkan pencemaran yang dijumpai dalam air laut. Kajian eksperimen ini menilai degradasi pencemaran yang hadir dalam air laut menggunakan fotopemangkin, di mana kombinasi TiO2 dan ZnO digunakan. Kesan dos pemangkin, pH, dan tempoh reaksi dipantau menggunakan peratus kecekapan penyingkiran jumlah karbon organik (TOC), keperluan kimia oksigen (COD), keperluan biologi oksigen (BOD), dan kebolehdegradasian (BOD/COD). Kebolehdegradasian adalah sangat penting bagi menyingkirkan bahan cemar dari air laut dan berperanan penting. Semakin tinggi kebolehdegradasian, semakin cekap prosedur rawatan. Peratus kadar pengurangan yang paling berkesan daripada data eksperimen adalah didapati pada TOC=59.80%, COD=75.20%, BOD=23.94%, dan biodegradasi=0.055. Bagi mengkaji kesan parameter terhadap model, kadar optimum, dan memantau keberkesanan parameter, kaedah Pakar Reka Bentuk pada rekaan Kotak Behnken (RSM-BBD) dan model ramalan berdasarkan sistem pengaruh menggunakan sistem MATLAB iaitu Inferens Neural-Fuzi Boleh Suai (ANFIS) digunakan. Pekali penentu R2 terhasil pada 0.977 bagi model RSM-BBD dan 0.99 pada model ANFIS. Berdasarkan reka bentuk RSM-BBD, peratus maksimum keberkesanan penyingkiran bahan cemar dijumpai pada TOC=55.4, COD=73.4, BOD=23.70%, dan BOD/COD=0.054, tetapi bagi model ANFIS, TOC=59.4, COD=75.4, BOD=24.1%, dan BOD/COD=0.055. Model ANFIS adalah lebih berkesan daripada model RSM-BBD dalam proses pengoptimuman.

show abstract

“…Titanium dioxide is widely studied as a photocatalyst due to its high photocatalytic activity. Furthermore, it is resistant to chemicals, insoluble in water, nontoxic, and inexpensive [ 6 ].…”

Section: Introductionmentioning

confidence: 99%

Jordanian Kaolinite with TiO2 for Improving Solar Light Harvesting Used in Dye Removal

et al. 2023

View full text Add to dashboard Cite

TiO2–Kaolinite nanocomposite photocatalysts were synthesized using the sol–gel method, with titanium isopropoxide/HCl as reactants and Jordanian kaolinite clay as a support material. The samples’ TiO2 content ranged from 10% to 70% (m/m). TiO2–Kaolinite composites were characterized using FTIR, SEM, XRF, and XRD. According to XRD measurements of the nano-composite samples, the intensity of the anatase peaks increased as the TiO2 percentage of the composition increased. As the percentage of TiO2 increased, so did the peaks of Ti–O–Si in FTIR. The extent of photocatalytic degradation of Congo-red dye was used to evaluate the photocatalytic activity of the prepared nanocomposites. After four hours under the sun, the percentage of Congo-red degradation ranged from 27 to 99 percent depending on the TiO2 content of the used nanocomposite. Meanwhile, the concentration drop in the dark did not exceed 10%. Photodegradation outperforms traditional treatment methods in terms of target degradation. Using naturally abundant materials such as clay in conjunction with metal oxides is widely regarded as an effective method of modifying the photoresponse properties of TiO2 particles, thereby improving solar light harvesting for target degradation.

show abstract

Studies on the Effect of TiO2 Nano Photocatalysis in the Pretreatment of Seawater Reverse Osmosis Desalination

Cited by 9 publications

References 2 publications

Chlorination disadvantages and alternative routes for biofouling control in reverse osmosis desalination

Chlorination disadvantages and alternative routes for biofouling control in reverse osmosis desalination

Experimental and Computational Analysis for Optimization of Seawater Biodegradability Using Photo Catalysis

Jordanian Kaolinite with TiO2 for Improving Solar Light Harvesting Used in Dye Removal

Contact Info

Product

Resources

About