Synthesis of polyelectrolyte-modified ordered nanoporous carbon for removal of aromatic organic acids from purified terephthalic acid wastewater

Anbia, Mansoor; Salehi, Samira

doi:10.1016/j.cherd.2011.10.010

Cited by 35 publications

(20 citation statements)

References 44 publications

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“…Thus, studies have been continued to develop efficient adsorbents with short contact time for removing noxious compounds from an aqueous medium. [21] However, studies in this field have not manufactured materials, which meet all requests for adsorption activity. The use of natural materials for the treatment wastewaters containing dyes is gaining more attention as a simple, effective and economical means of pollution treatment.…”

Section: Introductionmentioning

confidence: 99%

“…In previous studies, we investigated the effect of functionalization by PDDA on the uptake of acidic compounds from purified terephthalic acid wastewater and found that electrostatic interaction is the main mechanism for adsorbing acidic compounds to the surface of adsorbents containing PDDA. [21] The present study shows the synthesis and characterization of a set of solids synthesized by modification of raw clay with silica (as pillaring agent), CTS (as biopolymer) and PDDA (as cationic polyelectrolyte agent), to obtain efficient adsorbents for the uptake of the AB 92 from aqueous media. The synthesized samples were characterized by several methods.…”

Section: Introductionmentioning

confidence: 99%

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Removal of Acid Blue 92 by Using Amino‐Functionalized Silica‐Pillared Clay as a New Nano‐Adsorbent: Equilibrium, Kinetic and Thermodynamic Parameters

2020

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In this study, silica-pillared clay (SPC) and functionalized samples by chitosan (SPC/CTS) and different amounts of poly diallyl dimethylammonium chloride (SPC/PDDA-10, SPC/PDDA-20, and SPC/PDDA-30) have been synthesized and have been employed as some low-cost and eco-friendly adsorbents in the adsorptive removal of Acid Blue 92 (AB 92) from contaminated waters. The structural variation of functionalized and unfunctionalized samples confirmed by different techniques such as Scanning electron microscopy (SEM), Energy Dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR) and N 2 adsorption-desorption analysis. The SPC/PDDA-30 was selected for further studies due to its effective adsorption. The optimum values of adsorbent dosage, dye concentration, contact time and pH were found 0.02 g, 120 mg/L, 120 min and 5.0 respectively by applying response surface methodology (RSM). The adsorption equilibrium data were satisfactorily predicted by the Langmuir model and the adsorption process best fitted with a pseudo-secondorder model. Adsorption thermodynamic analysis indicated the uptake of AB 92 on SPC/PDDA-30 was exothermic and spontaneous. The high adsorption capacity of the selected nanocomposite could maintain after five successive adsorptiondesorption cycles by using 0.5 M NaOH.[a] Prof.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Removal of Acid Blue 92 by Using Amino‐Functionalized Silica‐Pillared Clay as a New Nano‐Adsorbent: Equilibrium, Kinetic and Thermodynamic Parameters

2020

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“…Industrial activities other than food processing can also generate wastewater containing dissolved BA. For example, commercial production of terephthalic acid in the plastic and textile manufacturing industries generates BA, among other aromatic compounds, as a byproduct . BA is a precursor molecule to various phenolic compounds such as vanillic, gallic, veratric, and hydroxybenzoic acids, present in agro‐industrial wastewater .…”

Section: Introductionmentioning

confidence: 99%

“…In this respect, use of hollow fiber membrane contactor (HFMC) for the removal of benzoic acid and subsequent attempt to model the process is relatively novel concept. Conventionally, carbon‐based adsorbents, including granular activated carbon or activated carbon fibers, have been shown to be effective for the removal of BA because of their large Brunauer–Emmett–Teller (BET) surface areas . Non‐carbon‐based adsorbents, including bentonites and kaolinite, have also been developed and found effective for the remediation of wastewater laden with BA .…”

Section: Introductionmentioning

confidence: 99%

Removal of Benzoic Acid from Water by Reactive Extraction Using Hollow Fiber Membrane Contactor: Experiment and Modeling

Agrahari

Verma

Bhattacharya

2014

CLEAN Soil Air Water

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A commercially available hydrophobic polypropylene based hollow fiber membrane contactor (HFMC: Liquicel® module) was used for the removal of dissolved benzoic acid (BA) from water. The module was operated in liquid–liquid extraction (LLE) mode using BA‐laden water as feed on the lumen side and trioctylamine (TOA) diluted in 1‐octanol as extractant on the shell side of the module. The aqueous and organic streams flowed counter‐currently within the HFMC module. Experiments were carried out under different operating conditions, that is, feed flow rates, extractant flow rates, and initial BA concentrations in the feed. The synthetic wastewater was prepared using BA at concentrations ranging from 150 to 2700 ppm in water, whereas the extractant solution consisted of 0.12 M TOA in 1‐octanol. BA reacted with TOA at the interface of the aqueous and membrane phases, forming a complex that was removed by the organic extractant flowing on the shell side of the module. In this study, up to 95% removal efficiency was obtained using the HFMC operated in the LLE mode. A mathematical model was developed that simulated transport of the bulk aqueous phase and within the pores of the membrane. The model simulation results were found to be in reasonable agreement with the experimental data.

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“…Hence, it is very necessary to determine the effective treatment technologies for PTA wastewater to achieve the prescribed discharge standards. In the recent years, numerous treatment technologies like adsorption [18][19][20][21], electrochemical methods [22,23], coagulationflocculation [3,24,25], thermochemical precipitation [26], crystallization [27], and oxidation process [28,29] have been used for PTA wastewater treatment. Electrochemical technologies like electrocoagulation as well as electro-Fenton are the efficient techniques used for wastewater treatment in the last few years.…”

Section: Introductionmentioning

confidence: 99%

A Comparative Study of Electrochemical Treatment of Para-Toluic Acid (p-TA) from Aqueous Solution: Process Optimization and Sludge Analysis

Sandhwar

Prasad

2017

Water Conserv Sci Eng

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The present study deals with the removal of paratoluic acid (p-TA) as well as chemical oxygen demand (COD) from synthetic solution. Pretreatment of aqueous solution was done by acid precipitation at different pH levels (3-6) and temperatures (15-60°C). The pretreated solution was further treated by electrocoagulation (EC) and electro-Fenton (EF) treatment technologies using iron anode and graphite cathode. Optimization of various independent operating parameters viz. initial pH (1-9), current density (30.48-152.44 A/m 2 ), electrolyte concentration (for EC) (0.03-0.07 mol/L), H 2 O 2 concentration (for EF) (300-700 mg/L), and electrolysis time (10-90 min) was performed using central composite design (CCD) in response surface methodology (RSM). At optimum operating conditions, maximum removal percent of p-TA 64.83, 74.50; COD 61.27, 68.21; and energy consumption (kWh/kg COD removed) 69.71, 41.60 were obtained by EC and EF processes, respectively. In this study, it was observed that the EF process was more efficient than EC process based on percent removal of p-TA and COD with minimum energy consumption (E.consumption). Sludge obtained after EC and EF treatments was analyzed for various physicochemical characteristics like settling, point of zero charge, XRD, FTIR, SEM/EDX, and DTA/TGA.

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Synthesis of polyelectrolyte-modified ordered nanoporous carbon for removal of aromatic organic acids from purified terephthalic acid wastewater

Cited by 35 publications

References 44 publications

Removal of Acid Blue 92 by Using Amino‐Functionalized Silica‐Pillared Clay as a New Nano‐Adsorbent: Equilibrium, Kinetic and Thermodynamic Parameters

Removal of Acid Blue 92 by Using Amino‐Functionalized Silica‐Pillared Clay as a New Nano‐Adsorbent: Equilibrium, Kinetic and Thermodynamic Parameters

Removal of Benzoic Acid from Water by Reactive Extraction Using Hollow Fiber Membrane Contactor: Experiment and Modeling

A Comparative Study of Electrochemical Treatment of Para-Toluic Acid (p-TA) from Aqueous Solution: Process Optimization and Sludge Analysis

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