Effect of pore structure on the removal of clofibric acid by magnetic anion exchange resin

Tan, Liang; Shuang, Chendong; Wang, Yunshu; Wang, Jun; Su, Yihong; Li, Aimin

doi:10.1016/j.chemosphere.2017.10.005

Cited by 21 publications

(7 citation statements)

References 39 publications

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“…For the removal of pharmaceuticals and acidic drugs such as CA metabolites, several physicochemical water treatment procedures were investigated, e.g., coagulation, adsorption through granular activated carbon [12,13], sedimentation, or filtration [14]. However, the main disadvantage of these techniques is that they transfer the pollutant from one phase to another but do not completely remove it through a mineralization mechanism.…”

Section: Introductionmentioning

confidence: 99%

New Evidence of the Enhanced Elimination of a Persistent Drug Used as a Lipid Absorption Inhibitor by Advanced Oxidation with UV-A and Nanosized Catalysts

Vrînceanu

Hlihor²,

Simion

et al. 2019

Catalysts

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This work demonstrates new evidence of the efficient destruction and mineralization of an emergent organic pollutant using UV-A and titanium nanosized catalysts. The target compound considered in this work is the primary metabolite of a lipid regulator drug, clofibrate, identified in many studies as refractory during conventional wastewater treatment. The photocatalytic performance study was carried out in batch mode at laboratory scale, in aqueous suspension. Kinetic data showed that titanium dioxide P25 Aeroxide® exhibits the highest photocatalytic efficiency compared to the other investigated catalysts. Pollutant degradation and mineralization efficiencies strongly increased when decreasing the initial substrate concentration. Target molecules oxidized faster when the catalyst load increased, and the mineralization was enhanced under acidic conditions: 92% of mineralization was achieved at pH 4 after 190 min of reaction. Radical quenching assays confirmed that HO• and ( h vb + ) were the reactive oxygen species involved in the photocatalytic oxidation of the considered pollutant. In addition, further results revealed that the removal efficiency decreased in real water matrices. Finally, data collected through a series of phytotoxicity tests demonstrated that the photocatalytic process considerably reduces the toxicity of the treated solutions, confirming the process’s effectiveness in the removal of persistent and biorefractory emergent organic water pollutants.

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Section: Introductionmentioning

confidence: 99%

New Evidence of the Enhanced Elimination of a Persistent Drug Used as a Lipid Absorption Inhibitor by Advanced Oxidation with UV-A and Nanosized Catalysts

Vrînceanu

Hlihor²,

Simion

et al. 2019

Catalysts

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“…Removing these contaminants from industrial wastewaters before effluents are discharged into the aquatic environment is obviously necessary. Various methods, such as biological processes [2], ultrasound [3], active carbon adsorption [4], ozone treatment [5], coagulation/flocculation [6], and ion exchange resin [7,8] and ion exchange membrane adsorption methods [9], have been investigated in an attempt to remediate dye-containing wastewaters. However, these methods are not always efficient and economical enough, so new alternative technologies that rely on low-cost materials are mandatory to solve the issues related to dye-containing wastewaters [10].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Zeolite A from Metakaolin and Its Application in the Adsorption of Cationic Dyes

et al. 2018

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“…Hence, the higher the functional group density of a resin, the higher the PTSA adsorption capacity. Nevertheless, the adsorption amount of resins significantly decreased with increase in the initial concentration of Na 2 SO 4 , suggesting that there was a strong competitive effect between the sulfate radical and the PTSA anion [24]. When the Na 2 SO 4 content in the solution increased to 1%, it was found that the adsorption amount order completely reversed to SD5 < SD4 < SD3 < SD2 < SD1.…”

Section: Effect Of So4 2− On Adsorption and Selectivity Of Ptsamentioning

confidence: 94%

“…However, the results were not always satisfactory because of lower selectivity of these commercial resins for ASAs to inorganic anions, especially sulfate, which is often present in ASA waste streams at a high level [19,20]. Therefore, many efforts have been made by scientists to modify weak-base anion exchangers to improve their adsorption capacity and selectivity, mainly focusing on the optimization of functional groups [11,12,[21][22][23] and the adjustment of the resin matrix structure [24]. It is worth noting that the functional group density of an adsorbent also affects its adsorption selectivity [25,26].…”

Section: Introductionmentioning

confidence: 99%

Effect of Functional Group Density of Anion Exchange Resins on Removal of p-Toluene Sulfonic Acid from Aqueous Solution

Sun

Zheng

et al. 2019

Applied Sciences

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Adsorption using anion exchange resins is an efficient method for the removal of aromatic sulfonic acids (ASAs) from industrial wastewater. In this study, a series of weak-base anion exchangers (SD1–SD5) were synthesized to investigate the effect of functional group density of resins on the adsorption of ASAs from wastewater containing competitive inorganic anions. p-Toluene sulfonic acid (PTSA) was selected as a target pollutant, and Na2SO4 was chosen as the competitive inorganic salt because of its widespread existence in industrial wastewater. Adsorption performances of these resins were evaluated and compared in terms of selectivity, kinetics, isotherms, regeneration, and dynamic adsorption behavior. Importantly, the PTSA uptake increased with the raising content of functional groups on resins in the absence of Na2SO4; however, in the presence of a high level of Na2SO4 (for example, ≥1%), a decrease in the functional group density could improve the adsorption capacity of resins for PTSA. Moreover, desorption and fixed bed column experiments were conducted in all resins, thereby confirming the effect of functional group density of resins on the PTSA adsorption in actual application. In brief, this research will provide a better understanding for the design and preparation of anion exchangers for the effective removal of ASA from wastewater.

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Effect of pore structure on the removal of clofibric acid by magnetic anion exchange resin

Cited by 21 publications

References 39 publications

New Evidence of the Enhanced Elimination of a Persistent Drug Used as a Lipid Absorption Inhibitor by Advanced Oxidation with UV-A and Nanosized Catalysts

New Evidence of the Enhanced Elimination of a Persistent Drug Used as a Lipid Absorption Inhibitor by Advanced Oxidation with UV-A and Nanosized Catalysts

Synthesis of Zeolite A from Metakaolin and Its Application in the Adsorption of Cationic Dyes

Effect of Functional Group Density of Anion Exchange Resins on Removal of p-Toluene Sulfonic Acid from Aqueous Solution

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