Feng Ningchuan, Guo Xueyi, Liang Sha
School of Metallurgical Science and Engineering, Central South University, Changsha, China.
J Hazard Mater. 2009 May 30;164(2-3):1286-92. doi: 10.1016/j.jhazmat.2008.09.096. Epub 2008 Oct 2.
An adsorbent, the chemically modified orange peel, was prepared from hydrolysis of the grafted copolymer, which was synthesized by interaction of methyl acrylate with cross-linking orange peel. The presence of poly (acrylic acid) on the biomass surface was verified by infrared spectroscopy (IR), scanning electron microscopy (SEM) and thermogravimetry (TG). Total negative charge in the biomass surface and the zeta potentials were determined. The modified biomass was found to present high adsorption capacity and fast adsorption rate for Cu (II). From Langmuir isotherm, the adsorption capacity for Cu (II) was 289.0 mg g(-1), which is about 6.5 times higher than that of the unmodified biomass. The kinetics for Cu (II) adsorption followed the pseudo-second-order kinetics. The adsorbent was used to remove Cu (II) from electroplating wastewater and was suitable for repeated use for more than four cycles.
一种吸附剂——化学改性橙皮，由接枝共聚物水解制备而成，该接枝共聚物是通过丙烯酸甲酯与交联橙皮相互作用合成的。通过红外光谱（IR）、扫描电子显微镜（SEM）和热重分析（TG）验证了生物质表面聚（丙烯酸）的存在。测定了生物质表面的总负电荷和zeta电位。发现改性生物质对Cu（II）具有高吸附容量和快速吸附速率。根据朗缪尔等温线，对Cu（II）的吸附容量为289.0 mg g(-1)，约为未改性生物质的6.5倍。Cu（II）吸附动力学遵循准二级动力学。该吸附剂用于从电镀废水中去除Cu（II），并且适合重复使用超过四个循环。
