期刊
RSC ADVANCES
卷 8, 期 3, 页码 1274-1280出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7ra12798g
关键词
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资金
- Natural Science Foundation of China [21467024, 51764049, 21661027]
- Found of State Key Laboratory of Mineral Processing [BGRIMM-KJSKL-2015-10]
- China Postdoctoral Science Foundation [2014M561426]
- Scientific Research Start-up Fund for High- Level Talents, Shihezi University [KX0138]
- National Training Programs of Innovation and Entrepreneurship for Undergraduates [201710759054]
- Transformation of Technological Achievements in Shihezi Unviersity [CGZH201715]
A pH-responsive amphoteric starch derivative (PRAS) bearing dual functional groups (amino and carboxyl groups) was prepared through etherification of starch with 2-chloro-4,6-diglycino-[1,3,5]-triazine. PRAS exhibits a reversible pH-response property in aqueous solution. The attractive property of PRAS is that it could be used as an effective flocculant for heavy metal-ion (e.g. Cu(II) and Zn(II)) removal from wastewater by changing pH. The transition of hydrophobicity-hydrophilicity would produce shrinkage of the polymer matrix, facilitating the release of heavy-metal ions from the saturated flocculant. As an ideal flocculant PRAS displayed outstanding stability and reproducibility, whose remove rate for Cu(II) and Zn(II) remained at 93% and 91% after three flocculation/regeneration cycles.
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