Degradation of dimethyl phthalate using persulfate activated by UV and ferrous ions: optimizing operational parameters mechanism and pathway

Badi, Mojtaba Yegane; Esrafili, Ali; Pasalari, Hasan; Kalantary, Roshanak Rezaei; Ahmadi, Ehsan; Gholami, Mitra; Azari, Ali

doi:10.1007/s40201-019-00384-9

Cited by 84 publications

(15 citation statements)

References 52 publications

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“…The following first-order reaction (Equation 1) (Badi et al, 2019) was employed to describe the degradation kinetics of PAEs in all of the experiments,…”

Section: Resultsmentioning

confidence: 99%

Photodegradation Pathways of Typical Phthalic Acid Esters Under UV, UV/TiO2, and UV-Vis/Bi2WO6 Systems

Wang

Zeng

et al. 2019

Front. Chem.

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Photolysis and photocatalysis of typical phthalic acid esters (dimethyl phthalate, DMP; diethyl phthalate, DEP; dibutyl phthalate, DBP) were carried out in UV, UV/TiO 2 , and UV-Vis/Bi 2 WO 6 systems. All of the selected phthalic acid esters and their decomposition byproducts were subjected to qualitative and quantitative analysis through HPLC and GC-MS. The results of 300 min of photolysis and photodegradation reaction were that each system demonstrated different abilities to remove DMP, DEP, and DBP. The UV/TiO 2 system showed the strongest degradation ability on selected PAEs, with removal efficiencies of up to 93.03, 92.64, and 92.50% for DMP, DEP, and DBP in 90 min, respectively. UV-Vis/Bi 2 WO 6 had almost no ability to remove DMP and DEP. However, all of the systems had strong ability to degrade DBP. On the other hand, the different systems resulted in various byproducts and PAE degradation pathways. The UV system mainly attacked the carbon branch and produced o-hydroxybenzoates. No ring-opening byproducts were detected in the UV system. In the photocatalytic process, the hydroxyl radicals produced not only attacked the carbon branch but also the benzene ring. Therefore, hydroxylated compounds and ring-opening byproducts were detected by GC-MS in both the UV/TiO 2 and UV-Vis/Bi 2 WO 6 photocatalytic systems. However, there were fewer products due to direct hole oxidation in the UV-Vis/Bi 2 WO 6 system compared with the UV/TiO 2 system, which mainly reacted with the pollutants via hydroxyl radicals.

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“…The following first-order reaction (Equation 1) (Badi et al, 2019) was employed to describe the degradation kinetics of PAEs in all of the experiments,…”

Section: Resultsmentioning

confidence: 99%

Photodegradation Pathways of Typical Phthalic Acid Esters Under UV, UV/TiO2, and UV-Vis/Bi2WO6 Systems

Wang

Zeng

et al. 2019

Front. Chem.

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“…The data transfer commands for connecting input to hidden layer and hidden to output layer were utilized as tansig and purelin , respectively. Some key statements of the algorithm as already described in our other publications 36 were: %creating ANN: net = newff (minmax[ input matrix ]) 1 , 10 , {'tansig','purelin'}, 'traingdx', 'mse'); %training of ANN: net = train( net , input vector , target vector ). %setting the maximum number of training epochs: net.trainParam.epochs = 10,000.…”

Section: Resultsmentioning

confidence: 99%

ANN-GA based biosorption of As(III) from water through chemo-tailored and iron impregnated fungal biofilter system

Tripathi

Ranjan

Verma

et al. 2022

Sci Rep

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The iron impregnated fungal bio-filter (IIFB) discs of luffa sponge containing Phanerochaete chrysosporium mycelia have been used for the removal of As(III) from water. Two different forms of same biomass viz. free fungal biomass (FFB) and modified free fungal biomass (chemically modified and iron impregnated; CFB and IIFB) have been simultaneously investigated to compare the performance of immobilization, chemo-tailoring and iron impregnation for remediation of As(III). IIFB showed highest uptake capacity and percentage removal of As(III), 1.32 mg/g and 92.4% respectively among FFB, CFB and IIFB. Further, the application of RSM and ANN-GA based mathematical model showed a substantial increase in removal i.e. 99.2% of As(III) was filtered out from water at optimised conditions i.e. biomass dose 0.72 g/L, pH 7.31, temperature 42 °C, and initial As(III) concentration 1.1 mg/L. Isotherm, kinetic and thermodynamic studies proved that the process followed monolayer sorption pattern in spontaneous and endothermic way through pseudo-second order kinetic pathway. Continuous mode of As(III) removal in IIFB packed bed bioreactor, revealed increased removal of As(III) from 76.40 to 88.23% with increased column height from 5 to 25 cm whereas the removal decreased from 88.23 to 69.45% while increasing flow rate from 1.66 to 8.30 mL/min. Moreover, the IIFB discs was regenerated by using 10% NaOH as eluting agent and evaluated for As(III) removal for four sorption–desorption cycles, showing slight decrease of their efficiency by 1–2%. SEM–EDX, pHzpc, and FTIR analysis, revealed the involvement of hydroxyl and amino surface groups following a non-electrostatic legend exchange sorption mechanism during removal of As(III).

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“…In the presence of Cl ions in solution, according to equation (8), it acts as a free radical and consumes SO 2− 4 ions. Terefore, following the decrease in the concentration of SO 2− 4 ions, the rate of oxidation in the system and fnally the removal efciency of ATN is greatly reduced [34].…”

Section: Efect Of Confoundersmentioning

confidence: 99%

“…Also, the presence of nitrate free radicals has a similar efect on the oxidation and fnal efciency of the process, but its efect is much less than chlorine [34].…”

Section: Efect Of Confoundersmentioning

confidence: 99%

Using Sono-Electro-Persulfate Process for Atenolol Removal from Aqueous Solutions: Prediction and Optimization with the ANFIS Model and Genetic Algorithm

Zahedi

Dehdashti

Mohammadi

et al. 2022

International Journal of Chemical Engineering

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Atenolol (ATN) is a drug that is widely used to treat some heart diseases, and since it cannot be completely decomposed in the human body, some amounts of it are found in surface water. These amounts may bring risks to the environment and humans, and for this reason, its removal is a must. In the present study, the combined sono-electro-persulfate method was used for ATN removal. Based on the design of the experiment conducted by response surface methodology (RSM), the effects of 5 main factors (pH, time, PS concentration, current intensity, and initial ATN concentration) have been investigated at 5 levels. After passing the test steps in different conditions, the remaining amount of ATN has been measured by high-performance liquid chromatography (HPLC). Finally, an adaptive neuro-fuzzy inference system (ANFIS) with 99.63% accuracy and a genetic algorithm (GA) were used to analyze and interpret data and predict optimal conditions. The obtained results indicate the possibility of a maximum efficiency of 99.8% in the mentioned conditions (Ph of 7.4, time of 18 min, PS concentration of 2000 mg/L, current intensity of 3.35 A, and initial ATN concentration of 11.2 mg/L). According to the obtained results, the initial concentration of ATN can be considered as the most effective factor in this process, and the best Ph range for this experiment was the neutral range. The sono-electro persulfate process can be mentioned as a new and effective method for removing ATN from water sources.

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Degradation of dimethyl phthalate using persulfate activated by UV and ferrous ions: optimizing operational parameters mechanism and pathway

Cited by 84 publications

References 52 publications

Photodegradation Pathways of Typical Phthalic Acid Esters Under UV, UV/TiO2, and UV-Vis/Bi2WO6 Systems

Photodegradation Pathways of Typical Phthalic Acid Esters Under UV, UV/TiO2, and UV-Vis/Bi2WO6 Systems

ANN-GA based biosorption of As(III) from water through chemo-tailored and iron impregnated fungal biofilter system

Using Sono-Electro-Persulfate Process for Atenolol Removal from Aqueous Solutions: Prediction and Optimization with the ANFIS Model and Genetic Algorithm

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