Operational parameters affecting the atrazine removal from water by using cyclodextrin based polymers as efficient adsorbents for cleaner technologies

Romita, Roberto; Rizzi, Vito; Semeraro, Paola; Gubitosa, Jennifer; Gabaldón, José Antonio; Gorbe, María Isabel Fortea; López, Vicente Manuel Gómez; Cosma, Pinalysa; Fini, Paola

doi:10.1016/j.eti.2019.100454

Cited by 40 publications

(21 citation statements)

References 68 publications

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“…The β-cyclodextrin-epichlorohydrin polymer (β-EPI) was synthesized by following the procedure reported by Pellicer et al (2019) and modified by Romita et al (2019). To obtain a final product with 1:25 CD:EPI molar ratio, 24 g of β-cyclodextrin and 60 mg of sodium borohydride were dispersed in 24 mL of deionized water, and the system was left under stirring at 50 °C for 10 min, then 26 mL of 40% (w/v) NaOH were added, and subsequently, 41.25 mL of epichlorohydrin (EPI) were introduced dropwise, keeping the system under agitation at 50 °C for 5 h. The so formed gel was washed four times according to the following order: first with 100 mL of acetone, then twice with 100 mL of water, and finally with 100 mL of acetone.…”

Section: Synthesis Of β-Cyclodextrin-epichlorohydrin and β-C Yclodextrin-epichlorohydrin-tio 2 Polymermentioning

confidence: 99%

“…Depending on the material used, adsorption can be very advantageous in terms of biocompatibility and environmental sustainability: several "bio-based" adsorbents, such as chitosan and cyclodextrin polymers, and industrial wastes, such as olive pomace, are very "green", cheap, harmless, and allow effective removal of several categories of EPs. Above all, they can be regenerated and reused multiple times, thus also promoting a circular economy (Rizzi et al 2017(Rizzi et al , 2018(Rizzi et al , 2019(Rizzi et al , 2020Romita et al 2019).…”

Section: Introductionmentioning

confidence: 99%

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The synergistic action of cyclodextrin-based adsorbent and advanced oxidation processes for sulfamethoxazole removal from water

Rizzi

Romita

Gómez‐López

et al. 2022

Int. J. Environ. Sci. Technol.

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In this work, the removal of sulfamethoxazole from water was studied by adsorption on a cyclodextrin–epichlorohydrin copolymer and through Advanced Oxidation Processes. The adsorption was efficient and fast, requiring only 10 min to reach the equilibrium; it was also highly favored, with adsorption efficiency higher than 80%, at slightly acidic pH and at room temperature. The desorption of sulfamethoxazole was obtained by raising the temperature to 80 °C. The regenerated polymer has been reused multiple times without any loss in performance, allowing a reduction in costs associated with the process. As an alternative method to regenerate the adsorbent material, the photodegradation of sulfamethoxazole adsorbed on the polymer alone and in the presence of TiO2 as a catalyst through continuous irradiation with UV light and Pulsed Light was attempted and studied. For this purpose, polymeric adsorbents containing different amounts of TiO2 were synthesized and tested. The Pulsed Light showed the highest efficiency since it allowed the complete removal of sulfamethoxazole, regardless of the presence of TiO2 which, however, reduces adsorption efficiency of the material. Furthermore, a qualitative assessment of formed pulsed light by-products was also attempted. The remains of SMX in solution were decomposed by Pulsed Light technology and the effect of the presence of hydrogen peroxide on the photodegradation process was also studied. Despite the presence of by-products after Advanced Oxidation Processes, the procedure proposed in this work is effective and easy to apply to water treatment plants, thanks to the use of environmental-friendly adsorbents and light sources. Graphical abstract

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Section: Synthesis Of β-Cyclodextrin-epichlorohydrin and β-C Yclodextrin-epichlorohydrin-tio 2 Polymermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The synergistic action of cyclodextrin-based adsorbent and advanced oxidation processes for sulfamethoxazole removal from water

Rizzi

Romita

Gómez‐López

et al. 2022

Int. J. Environ. Sci. Technol.

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“…An organic solvent such as acetonitrile increases atrazine solubility in water, justifying its selection for this desorption study. The use of methanol as the most adequate extraction solvent for atrazine desorption from synthetic polymers was demonstrated in a recent study, achieving 73.5% as maximum atrazine desorption percentage [67]. In the same study, it was concluded that higher efficiency values are reached for all materials when using a lower content of organic solvent, which minimizes the environmental impact of this process.…”

Section: Prb Breakthrough Modellingmentioning

confidence: 90%

Cleaner Approach for Atrazine Removal Using Recycling Biowaste/Waste in Permeable Barriers

Lago¹,

Silva²,

Tavares³

2021

Recycling

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This work addresses the rehabilitation of water contaminated with atrazine, entrapping it in a permeable and sustainable barrier designed with waste materials (sepiolite) and with biomaterials (cork and pine bark). Atrazine adsorption was assessed by kinetics and equilibrium assays and desorption was tested with different extraction solvents. Adsorbed atrazine was 100% recovered from sepiolite using 20% acetonitrile solution, while 40% acetonitrile was needed to leach it from cork (98%) and pine bark (94%). Continuous fixed-bed experiments using those sorbents as PRB were performed to evaluate atrazine removal for up-scale applications. The modified dose-response model properly described the breakthrough data. The highest adsorption capacity was achieved by sepiolite (23.3 (±0.8) mg/g), followed by pine bark (14.8 (±0.6) mg/g) and cork (13.0 (±0.9) mg/g). Recyclability of sorbents was evaluated by adsorption-desorption cycles. After two regenerations, sepiolite achieved 81% of atrazine removal, followed by pine with 78% and cork with 54%. Sepiolite had the best performance in terms of adsorption capacity/stability. SEM and FTIR analyses confirmed no significant differences in material morphology and structure. This study demonstrates that recycling waste/biowaste is a sustainable option for wastewater treatment, with waste valorization and environmental protection.

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“…In contrast, the adsorption rate of DS on unmodified zeolite was 52%. Romita et al (2019) studied the adsorption and removal of atrazine in water by α-, β-, and γ-cyclodextrin-epichlorohydrin water-insoluble copolymers (CEWICs). The order of adsorption capacity was found to be α-CEWICs > β-CEWICs > γ-CE-WICs, and the best contact time of adsorbent solution was 1 hr.…”

Section: Mineral Surface Adsorption and Ion Exchangementioning

confidence: 99%

Emerging pollutants—Part II: Treatment

Liu

Zhang

Chang

2020

Water Environment Research

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Emerging pollutants (EPs) refer to a class of pollutants, which are emerging in the environment or recently attracted attention. EPs mainly include pharmaceutical and personal care products (PPCPs), endocrine-disrupting chemicals (EDCs), and antibiotic resistance genes (ARGs). EPs have potential threats to human health and ecological environment. In recent years, the continuous detections of EPs in surface and ground water have brought huge challenges to water treatment and also made the treatment of EPs become an international research hotspot. This paper summarizes some research results on EPs treatment published in 2019. This paper may be helpful to understand the current situations and development trends of EP treatment technologies.

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Operational parameters affecting the atrazine removal from water by using cyclodextrin based polymers as efficient adsorbents for cleaner technologies

Cited by 40 publications

References 68 publications

The synergistic action of cyclodextrin-based adsorbent and advanced oxidation processes for sulfamethoxazole removal from water

The synergistic action of cyclodextrin-based adsorbent and advanced oxidation processes for sulfamethoxazole removal from water

Cleaner Approach for Atrazine Removal Using Recycling Biowaste/Waste in Permeable Barriers

Emerging pollutants—Part II: Treatment

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