Preparation and flocculation properties of modified alginate amphiphilic polymeric nano-flocculants
- 76 Downloads
The novel nano-flocculants were synthesized through a conjugation of dodecylamine with partly oxidized sodium alginate. The structures of the flocculants were characterized by FTIR, 1HNMR, TGA, and EA. The flocculants possessed amphiphilic structures and formed nano-micelles through self-assembly in water. The nano-micelles showed rod-like shapes about 100 nm. Removal rates of the flocculants for Pb2+ and bisphenol A were determined under different conditions, showing the removal rates as high as 97.20% and 88.66% for Pb2+ and bisphenol A, respectively. The flocculation mechanisms were revealed by X-ray photoelectron spectroscopy (XPS) and scanning electron microscope (SEM), respectively. Isotherm adsorption studies indicated that the flocculation for Pb2+ accorded with the Langmuir single-layer adsorption model, and for bisphenol A accorded with the Freundlich multi-layer adsorption model. The quasi-second-order kinetic model was suitable for describing the adsorption kinetics. The new nano-flocculant was a promising agent for removing both heavy metal ions and organic pollutants of wastewater.
KeywordsNano-flocculants Modified alginate Flocculation Heavy metal ions Organic pollutants
This work was supported by the Natural Science Foundation of Jiangsu Province (BK20161128), MOE & SAFEA for the 111 Project (B13025), and Research Fund of Central University (JUSRP51626B).
Compliance with ethical standards
The authors declare that they have no conflict of interest.
- Cao GP, Zhuang YF, Liu BL (2014) Simultaneous determination of bisphenol A and bisphenol S in environmental water using ratio derivative ultraviolet spectrometry. South Afr J Chem Suid Afr Tydskr Chem 67:99–103Google Scholar
- Xie SY, Wu SS, Bao SH, Wang YQ, Zheng YT, Deng DF, Huang LP, Zhang LL, Lee M, Huang ZG (2018) Intelligent mesoporous materials for selective adsorption and mechanical release of organic pollutants from water. Adv Mater 30Google Scholar