Sorption of acid dye by surfactant modificated natural zeolites

Mirzaei, Nezam; Mirfazaelian, Hadi; Gholami, Maryam; Fard, Reza Fouladi; Aminabad, Mehri Solaimany

doi:10.1016/j.jtice.2015.07.010

Cited by 58 publications

(21 citation statements)

References 57 publications

(66 reference statements)

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“…The reaction pathways, along times to reach the equilibrium is explained by adsorption kinetic [37][38][39]. Studying the adsorption kinetics is so important to understand the adsorption reactions dynamic and predicting the adsorption rate, which is useful for process design and modeling.…”

Section: Adsorption Kineticsmentioning

confidence: 99%

Efficiency of Multi Walled Carbon Nanotubes for Removing Direct Blue 71 from Aqueous Solutions

Fard¹,

Sar²,

Fahiminia³

et al. 2018

Eurasian J Anal Chem

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Dye wastewater produced from industrial activity is usually toxic, resistant to biodegradation and persistent in the environment. The aim of this study was to evaluate the efficiency of multiwalled carbon nanotubes (MWCNTs) for decolorization of Direct Blue 71 (DB71). In this experimental study, the effect of various variables including contact time, solution pH, adsorbent dose, and initial dye concentration was evaluated in a batch reactor. The adsorption and kinetic models were evaluated to explain the adsorbed dye and dynamic reaction. The results of this study showed that the efficiency of dye removal increased, as the contact time and adsorbent dose increased, but as pH and initial dye concentration increased, removal efficiency decreased. The maximum efficiency of Direct Blue 71 removal was observed at acidic solution (pH=3), contact time of 90 minutes, adsorbent dose of 0.6 g/l and initial dye concentration of 25 mg/l. The adsorption of direct blue 71 best fitted the Langmuir isotherm (R 2 =0.87) and pseudo first order kinetic equation (R 2 =0.99). According to the results obtained, multiwalled nanotubes was offered as an effective adsorbent for removing direct blue 71.

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Section: Adsorption Kineticsmentioning

confidence: 99%

Efficiency of Multi Walled Carbon Nanotubes for Removing Direct Blue 71 from Aqueous Solutions

Fard¹,

Sar²,

Fahiminia³

et al. 2018

Eurasian J Anal Chem

Self Cite

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“…Among the different sorbents used for this purpose, clay minerals, such as bentonite and zeolite, have shown effective results as adsorbent and ion exchange media for water and wastewater treatment applications, especially for removing heavy metals, organic pollutants, and nutrients [28][29][30]. Bentonite and/or zeolite have been used to remove organic pollutants such as dyes, hormones, pharmaceuticals, caffeine, and other ECs [31][32][33][34][35][36]; the rate of adsorption in these materials depends on factors such as temperature and pH, as well as the chemical nature of the retained compound. The adsorption of estradiol in clay minerals is an exothermic and spontaneous process; levels of pH higher to 10 decrease the adsorption capability [37].…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Estradiol by Natural Clays and Daphnia magna as Biological Filter in an Aqueous Mixture with Emerging Contaminants

Pérez‐González

Pinos-Vélez

Cipriani-Ávila

et al. 2021

Eng

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Among emerging pollutants, endocrine disruptors such as estradiol are of most concern. Conventional water treatment technologies are not capable of removing this compound from water. This study aims to assess a method that combines physicochemical and biological strategies to eliminate estradiol even when there are other compounds present in the water matrix. Na-montmorillonite, Ca-montmorillonite and zeolite were used to remove estradiol in a medium with sulfamethoxazole, triclosan, and nicotine using a Plackett–Burman experimental design; each treatment was followed by biological filtration with Daphnia magna. Results showed between 40 to 92% estradiol adsorption in clays; no other compounds present in the mixture were adsorbed. The most significant factors for estradiol adsorption were the presence of nicotine and triclosan which favored the adsorption, the use of Ca-montmorillonite, Zeolite, and time did not favor the adsorption of estradiol. After the physicochemical treatment, Daphnia magna was able to remove between 0–93% of the remaining estradiol. The combination of adsorption and biological filtration in optimal conditions allowed the removal of 98% of the initial estradiol concentration.

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“…Due to their adverse effects on human beings and aquatic life, these contaminants have been listed among the high priority toxic and dangerous pollutants [3][4][5][6]. In the recent years, application of nanoparticles in the treatment processes has been increased [7][8][9][10][11]. Advanced oxidation processes (AOPs) like zero valent iron/persulfate, ferrous iron/ persulfate and Nano zero valent iron/ persulfate are well known and effective techniques for elimination of various organic pollutants from aqueous solutions with generating sulfate free radicals and reactive oxygen species (ROS).…”

Section: Introductionmentioning

confidence: 99%

Application of Adaptive Neural Fuzzy Inference System and Fuzzy C- Means Algorithm in Simulating the 4-Chlorophenol Elimination from Aqueous Solutions by Persulfate/Nano Zero Valent Iron Process

Baziar¹,

Nabizadeh²,

Mahvi³

et al. 2017

Eurasian J Anal Chem

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This study investigated the application of adaptive neural fuzzy inference system (ANFIS) and Fuzzy c-means (FCM) algorithm for the simulation and prediction of 4-chlorophenol elimination in aqueous media by the persulfate/Nano zero valent iron process. The structure of developed model which resulted to the minimum value of mean square error was a Gaussian membership function with a total number 10 at input layer, a linear membership function at output layer and a hybrid optimum method, which is a combination of backpropagation algorithm and least squares estimation, for optimization of Gaussian membership function parameters. The prediction of developed model in elimination 4-chlorophenol was significantly close to the observed experimental results with R2 value of 0.9942. The results of sensitivity analysis indicated that all operating variables had a strong effect on the output of model (4-CP elimination). However, the most effective variable was pH followed by persulfate, NZVI dosage, reaction time and 4-CP concentration. The performance of developed model was also compared with a quadratic model generated in a study by Response Surface Methodology (RSM). The results indicated that the ANFIS-FCM model was superior to the quadratic model in terms of prediction accuracy and capturing the behavior of the process.

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Sorption of acid dye by surfactant modificated natural zeolites

Cited by 58 publications

References 57 publications

Efficiency of Multi Walled Carbon Nanotubes for Removing Direct Blue 71 from Aqueous Solutions

Efficiency of Multi Walled Carbon Nanotubes for Removing Direct Blue 71 from Aqueous Solutions

Adsorption of Estradiol by Natural Clays and Daphnia magna as Biological Filter in an Aqueous Mixture with Emerging Contaminants

Application of Adaptive Neural Fuzzy Inference System and Fuzzy C- Means Algorithm in Simulating the 4-Chlorophenol Elimination from Aqueous Solutions by Persulfate/Nano Zero Valent Iron Process

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