Utilization of agricultural waste to herbicide removal: Magnetic BEA zeolite adsorbents prepared by dry-gel conversion using rice husk ash–derived SiO2 for paraquat removal

Phouthavong, Vanpaseuth; Hagio, Takeshi; Park, Jae‐Hyeok; Nijpanich, Supinya; Srihirunthanon, Teeranun; Chantanurak, Nutchanan; Duangkhai, Kanchanok; Chounlamany, Vanseng; Phomkeona, Kesiny; Kong, Long; Li, Liang; Ichino, Ryoichi

doi:10.1016/j.arabjc.2023.104959

Cited by 3 publications

(1 citation statement)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Accordingly, various treatment methods have been developed for removing MG from wastewater such as advanced oxidation, membrane separation, and adsorption. − Among these methods, adsorption is one of the most economical and effective methods due to its simple process and operation, less harmful secondary products, and low price. Traditional adsorbents such as activated carbon, charcoal, hydrogel, rice husks, eggshell, metal–organic frameworks, and nanocomposites are currently used in wastewater treatment. − Nonetheless, the abovementioned adsorbents are associated with being expensive to synthesize, significant environmental toxicity, and nonbiodegradability. − …”

Section: Introductionmentioning

confidence: 99%

Environmental Applications of Biobased Polydopamine-β-Cyclodextrin-Epichlorohydrin Supramolecular Hydrogel with Tuneable Swelling and Selective Adsorption Behaviors

Hu,

Wan

et al. 2024

ACS Appl. Polym. Mater.

View full text Add to dashboard Cite

Supramolecular hydrogels have been extensively studied for environmental applications owing to their biocompatible, nontoxic, and cost-effective properties. Herein, a polydopamine-β-cyclodextrin-epichlorohydrin (PDA-β-CD-EP) supramolecular hydrogel was facilely prepared through one-pot polymerization using a molar ratio of dopamine (DA)/β-cyclodextrin (β-CD)/epichlorohydrin (EP) of 1/2/50. Compared with other hydrogels, the (PDA-β-CD-EP) supramolecular hydrogel can selectively adsorb malachite green from mixed dyes. The structure, surface morphology, and thermostability of the PDAβ-CD-EP supramolecular hydrogels were illustrated by FT-IR, SEM−EDX, and TGA-DTG, respectively. Interestingly, the PDA-β-CD-EP-2 supramolecular hydrogel exhibited excellent pH-responsive swelling behavior. The influences of the pH, adsorption time, dosage, and initial concentration were systematically studied. Under optimal conditions, the maximum adsorption capacity of the PDA-β-CD-EP-2 supramolecular hydrogel was 652.1 mg/g for MG according to the Langmuir fitting results, much higher than those of the other adsorbents. More importantly, the PDA-β-CD-EP-2 supramolecular hydrogel possessed good reproducibility, reusability, and biodegradability. Besides, the selective adsorption mechanism was proposed and proved, such as hole size and shape effect, electrostatic force, and host−guest interaction. Overall, this study could provide a method to prepare a PDA-β-CD-EP-2 supramolecular hydrogel as a biosorbent for wastewater remediation.

show abstract