期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 4, 期 12, 页码 7217-7224出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.6b02178
关键词
Cellulose; Clay; Nanocomposite; Superabsorbent hydrogels; Dye removal
资金
- Pearl River S&T Nova Program of Guangzhou [201506010101]
- Guangzhou science and technology project [201510010221]
- Hubei Province Science Foundation for Youths [2015CFB499]
- National Natural Science Foundation of China [21304021]
- Jiangsu Province Science Foundation for Youths [BK20150382]
Toxic dyes have threatened human health through the consumption of polluted water, so removal of dyes from wastewater has become a hot topic in both academic and industrial fields. Herein, we reported a kind of celluloseclay hydrogel with superabsorbent properties, superior mechanical performance, and high dye removal efficiency. The main strategy for the preparation of superabsorbent hydrogels was chemical cross-linking of cellulose, carboxymethyl cellulose (CMC), and the intercalated clay in NaOH/urea aqueous solution. The as-prepared hydrogels exhibited high absorption capacity for methylene blue (MB) solution through a spontaneous physic-sorption process which fitted well with pseudo-second-order and Langmuir isotherm models. The maximum removal efficiencies of hydrogel samples for MB solutions with concentrations of 10 mg L-1 and 100 mg L-1 were 96.6% and 98%, respectively. These results demonstrated that celluloseclay nanocomposite hydrogels were effective adsorbents for removal of MB dyes, which would provide a new platform for dye decontamination.
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