麦秆水凝胶的制备及其对Cu(Ⅱ), Mn(Ⅱ)的吸附

作者：Lyu Xiaoping; Wang Yang^*; Sun Qianyu; Sheng Jie; Yang Rendang

来源：China Pulp and Paper, 2019, 38(11): 37-41.

DOI：10.11980/j.issn.0254-508X.2019.11.006

• Adsorption properties
• Heavy metal ions
• Hydrogel
• Wheat straw

Wheat straw hydrogel with high adsorption capacity for Cu(II) and Mn(II) was prepared by using wheat straw as raw material via free radical graft copolymerization. In the experiment, the wheat straw was first pulverized into powder and ultrasonically purified with sodium hydroxide solution. Then, the wheat straw hydrogel was obtained by graft copolymerization using ammonium persulfate as an initiator, acrylic acid and acrylamide as monomers, and N,N-methylenebisacryloyl as a crosslinking agent. The hydrogels were characterized by fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM) and thermogravimetry (TGA), and its adsorption properties for heavy metal ions such as Cu(II) and Mn(II) were studied. The results of FT-IR and SEM analysis confirmed the wheat straw hydrogel had been successfully prepared. Wheat straw hydrogel had good adsorption properties for Cu(II) and Mn(II), and the adsorption process conformed to the quasi-secondary kinetic model. When the ion concentrations were 500 mg/L and 400 mg/L and shaking adsorption time was 6 h, the ion adsorption amounts reached 238.1 mg/g and 176.9 mg/g, respectively. ? 2019, China National Pulp and Paper Research Institute(CNPPRI). All right reserved.

• 单位
  华南理工大学