期刊
REACTIVE & FUNCTIONAL POLYMERS
卷 174, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.reactfunctpolym.2022.105239
关键词
Hydrogel adsorbent; Calcium hydroxide nano-spherulites; Anionic dye; Adsorption; Wastewater
资金
- National Natural Science Foundation of China, Excellent Young Scientists Fund [5212290021]
- Shenzhen-Hong Kong-Macao science and technology plan (c) [SGDX2020110309360]
- Science and Technology Development Fund, Macau SAR [0138/2020/A3]
- Multi-Year Research Grant [MYRG2019-00118-IAPME]
- Univer-sity of Macau
In recent years, hydrogel adsorbents have gained significant attention as promising candidates for the removal of organic dyes. This study successfully developed a polyelectrolyte hydrogel adsorbent for the removal of anionic dyes, which exhibited high adsorption capacity and short contact time. The experimental results demonstrated that this hydrogel adsorbent showed high adsorption capacities for various organic dyes, indicating its potential application in wastewater treatment.
Treatment of wastewater which containing organic dyes has attracted great attention in the last decades since organic dyes were produced in an increasing quantity. Hydrogel adsorbent, as a promising candidate for organic dye removal from aqueous solution, has been studied by many researchers in recent years. However, it's still a challenge to create hydrogel adsorbent with high adsorption capacity and short contact time concurrently. Herein, we present a polyelectrolyte hydrogel adsorbent for anionic dyes removal which constructed by cationic monomer diallyldimethylammonium chloride (DADMAC) and acrylamide (AAm). Using calcium hydroxide nano-spherulites (CNS) as crosslinker, this physical hydrogel adsorbent showed a loosely crosslinked network structure. In optimal condition, the obtained P(AAm-DADMAC)/CNS hydrogel adsorbent showed a maximum adsorption capacity of 409 mg/g for methyl orange with a short contact time of 135 min. In addition, the adsorption process of this hydrogel adsorbent was well described by pseudo-first-order kinetic model and Langmuir adsorption isotherm model. Moreover, our P(AAm-DADMAC)/CNS hydrogel adsorbent also exhibited high adsorption capacities for other anionic dye, including Congo red (862 mg/g), Eriochrome black T (1139 mg/g) and methyl blue (722 mg/g). These results indicated that the P(AAm-DADMAC)/CNS hydrogel was a promising adsorbent material in wastewater treatment application.
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