Photocatalytic degradation of phenolic compound (phenol, resorcinol and cresol) by titanium dioxide photocatalyst on ordered mesoporous carbon (CMK-3) support under UV irradiation

Rahmani, Alireza; Rahimzadeh, Hadi; Beirami, Somayeh

doi:10.5004/dwt.2019.23673

Cited by 8 publications

(5 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Yusoff et al, (2019) reported that the COD removal efficiency was 82%-85% throughout 4 days while the removal efficiency of phenol ranged between 83%-85% at 200 mg L −1 of phenol. Rahmani et al,(2019) showed that the highest efficiency of phenol removal (100 mg L −1 initial concentration) was obtained using the UV/TiO2 process (94%) and the total organic carbon removal efficiency was observed to be 74%; however, this technology used is expensive and requires some technical proficiency, contrarily to the technology used in this study, which is the simplest and the most flexible environmental technology. Pasdar and Marandi (2013) showed that the COD removal efficiency was 61.5% at 100 ppm of phenol, but as phenol concentration was increased to 200 ppm, a 47.5% of COD removal efficiency was observed, showing that the effluent is of difficult biodegradability, probably because of the phenol toxic effects and the critical phenol loading was 100 ppm.…”

Section: Effect Of Phenol Concentrationmentioning

confidence: 74%

“…Phenol and its compounds are widely produced from textile, paper, pesticides, and petrochemical industries, which have recently been a danger to aquatic environments due to low biodegradability (Rahmani et al, 2019). Several studies have reported significant removal of phenol through physicochemical treatment processes such as chemical oxidation (Shukla et al, 2011), extraction (Xu et al, 2006), ion exchange (Caetano et al, 2009), polymerization (Pradeep et al, 2012), photocatalytic (Yusoff et al, 2015), membrane processes (Loh et al, 2016), reverse osmosis (Khazaali et al, 2014), and electrochemical methods (Hurwitz et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Upgrading sequencing batch reactor using attached biofilm

Abdelaziz¹,

Fouad

Mossad

2021

Water Environment Research

View full text Add to dashboard Cite

A conventional sequencing batch reactor (SBR) was upgraded using fixed biofilm carriers with a specific surface area around 18 m 2 m −3 . The upgraded SBR was investigated to remove phenol from high strength wastewater operated under various operational conditions. The operational conditions used were variable volume exchange ratio (VER) up to 75%, hydraulic retention time (HRT) from (10.7-21.3 hr), aeration time (from 2 to 8 hr), and initial phenol concentration up to 600 mg L −1 . It was found that the upgraded SBR increased the removal efficiencies of biological oxygen demand (BOD 5 ), chemical oxygen demand (COD), and total suspended solids (TSS) by about 10% using high strength wastewater without phenol compared to SBR. Furthermore, the removal rate of phenol for the upgraded SBR was higher than conventional SBR by about 18% at 600 mg L − of initial phenol concentration under the same operational conditions. Compared to the conventional SBR, the upgraded version reduced the aeration step by 25% and achieved higher removal efficiency of phenol. Moreover, it reduced the excess sludge by about 23% and enhanced its properties by lowering the sludge volume index (SVI) by about 33%. © 2021 Water Environment Federation • Practitioner points• Upgrading conventional SBR by adding biofilm carriers is necessary for wastewater treatment with high strength wastewater. • The upgraded SBR has a higher resistance toward phenol compound due to the presence of the attached biofilm. • The upgraded SBR enhances sludge settling properties, decreases the amount of excess sludge, and also reduces the start-up period. • The number of cycles per day by upgraded SBR was more than the conventional SBR by 15%. • The upgraded SBR is an effective system and has good operational stability.

show abstract

Section: Effect Of Phenol Concentrationmentioning

confidence: 74%

Section: Introductionmentioning

confidence: 99%

Upgrading sequencing batch reactor using attached biofilm

Abdelaziz¹,

Fouad

Mossad

2021

Water Environment Research

View full text Add to dashboard Cite

show abstract

“…As can be seen, the narrow (100) peaks at about 2θ = 0.9° for SBA-15, CMK-3, and Fe/CMK-3 were representative of the mesoporous structure and high orderings of the samples. Also, weak (110) and (200) peaks at 2θ = 1.5° and 1.7° show a two-dimensional hexagonal structure of the samples (Rahmani, Rahimzadeh, et al, 2019;Rahmani, Shabanloo, et al, 2019) In addition, after the grafting and immobilization of iron nanoparticles on the CMK-3, the intensity of the diffraction peaks in Fe/CMK-3 is weakened. The FTIR spectra for catalysts of SBA-15, CMK-3, and Fe/CMK-3 are shown in Figure 2.…”

Section: Resultsmentioning

confidence: 96%

“…where Y, β 0 , β i , β ii , β ij , and x i or x j are the predicted response, the constant coefficient, regression coefficients for linear effects, quadratic coefficients, interaction coefficients, and the coded values of the parameters, respectively (Rahmani, Rahimzadeh, & Beirami, 2019;Rahmani, Shabanloo, Fazlzadeh, Poureshgh, & Vanaeitabar, 2019). The fit of the models was evaluated by determining the coefficients (R 2 ) and adjusted R 2 (R 2 adj).…”

Section: Experimental Designmentioning

confidence: 99%

Sono‐photo‐assisted heterogeneous activation of peroxymonosulfate by Fe/CMK‐3 catalyst for the degradation of bisphenol A, optimization with response surface methodology

Rahimzadeh

Rahmani

Samadi

et al. 2019

Water Environment Research

Self Cite

View full text Add to dashboard Cite

The present study examined the removal of bisphenol A (BPA) and total organic carbon (TOC) from aqueous solutions by the Fe/CMK-3 as peroxymonosulfate activator used in the sono-photo-catalytic process. The synthesis of Fe/CMK-3 was carried out using the co-precipitation method, and it was characterized by FTIR, XRD, BET, EDX, and TEM. The results showed that the iron nanoparticles were uniformly embedded in the CMK-3 pores. The effect of factors affecting on the removal of BPA and TOC was evaluated by response surface methodology (RSM) with center composite design (CCD). The analysis of variance of the quadratic model showed that the model is significant (p value < .0001 and R 2 > 99.4%) and can be used to optimize the removal efficiency of BPA. Optimization results showed that the highest removal efficiency of BPA (100%) and TOC (80.6%) was achieved in optimum conditions of pH 7.8, catalyst dose 0.33 g/L, PMS dose 3.35 mmol/L, BPA concentration 39.3 mg/L, and 78.5 min. In addition, statistical analysis of the data showed that, in the studied range, the initial concentration of BPA was the most influential factor, followed by pH and PMS dose. Highest catalytic stability of Fe/CMK-3 showed the potential applicability of catalyst in the treatment of BPA-containing solutions. The quenching test showed that sulfate radical was the main responsible for the removal of BPA. The decrease in I OUR value after the 75-min reaction time indicates that this process has a high ability for oxidation of the pollutant and its intermediates. Generally, the observed results suggest that the Fe-CMK-3/UV/US/PMS system can be a promising procedure for the removal of persistent pollutants such as BPA from aqueous media.

show abstract

“…Various organic pollutants in wastewaters are highly toxic and non-biodegradable nature, one of which is phenol. Phenols are broadly used in textile, pesticides, paper and petrochemical industrier [1]. Treating wastewater containing phenol has been proposed by various technologies such as adsorption, activated carbon, chemical oxidation, and biological treatment.…”

Section: Introductionmentioning

confidence: 99%

Determination of photocatalytic process parameters on phenol degradation using TiO2-MWCNT (cocoPAS) composite

Heltina¹,

Putri²,

Utama³

et al. 2021

Int. J. Sci. Res. Arch.

View full text Add to dashboard Cite

Multi-walled carbon nanotubes (MWCNT) were prepared by treatment of cocoPas and titanium dioxide nanocomposites TiO2 – MWCNT (cocoPAS) prepared by stirring and mixing method was used as a photocatalyst for the degradation of phenol in water under light irradiation. The morphology and microstructure of the composites were characterized with SEM, FT-IR, BET, XRD and UV-visible spectrophotometer. The purpose of this study were synthesize TiO2-MWCNT (cocoPAS) composite and evaluate its performance for photodegradation phenol. It was found that the degree of photodegradation of phenol under UV light was highly dependent on the concentration of phenol and the degradation temperature. The presence of MWCNT worked as the adsorbent and electron acceptor to efficiently enhance the phenol photodegradation. The as-prepared nanotubes, with surfactant contents, showed high- photocatalytic activities with increase degradation. These results indicate that TiO2 – MWCNT (cocoPAS)composites using cocoPAS can be used to enhance degradation and can expand potential applications for the degradation of organic pollutants.

show abstract

Photocatalytic degradation of phenolic compound (phenol, resorcinol and cresol) by titanium dioxide photocatalyst on ordered mesoporous carbon (CMK-3) support under UV irradiation

Cited by 8 publications

References 46 publications

Upgrading sequencing batch reactor using attached biofilm

Upgrading sequencing batch reactor using attached biofilm

Sono‐photo‐assisted heterogeneous activation of peroxymonosulfate by Fe/CMK‐3 catalyst for the degradation of bisphenol A, optimization with response surface methodology

Determination of photocatalytic process parameters on phenol degradation using TiO2-MWCNT (cocoPAS) composite

Contact Info

Product

Resources

About