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Preparation of Surface Ion-Imprinted Materials Based on Modified Chitosan for Highly Selective Recognition and Adsorption of Nickel Ions in Aqueous Solutions
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2020-03-23 , DOI: 10.1021/acs.iecr.9b04755 Wei Liu 1 , Minghui Zhang 1 , Xueting Liu 1 , Hewei Zhang 1 , Jian Jiao 1 , Huiying Zhu 1 , Zhiyong Zhou 1 , Zhongqi Ren 1
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2020-03-23 , DOI: 10.1021/acs.iecr.9b04755 Wei Liu 1 , Minghui Zhang 1 , Xueting Liu 1 , Hewei Zhang 1 , Jian Jiao 1 , Huiying Zhu 1 , Zhiyong Zhou 1 , Zhongqi Ren 1
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Nickel with good corrosion resistance is usually used for electroplating. However, the human health and live environment will be in danger if the discharge of nickel wastewater exceeds certain levels. Nickel pollutants are derived mainly from mining, smelting, electroplating, and other industries. Thus, it is very important to separate them from wastewater. One way is via surface imprinting. Here, chitosan, nickel nitrate, and epichlorohydrin were used as the substrate, template ion, and cross-linking agent, respectively, to synthesize a novel imprinted material for selective nickel adsorption. The adsorption kinetics study indicated that equilibrium was reached within 200 min, and the adsorption behavior was in good agreement with a pseudo-second-order nonlinear model. The adsorption capacity approached 20.0 mg·g–1, and the selectivity to Ni2+ was 56.9, 55.2, and 49.2 in the presence of cobalt, calcium, and manganese ions, respectively. In addition, the adsorption capacity remained at 96.1% after the polymer was reused five times. Overall, the imprinted polymer was a highly selective adsorbent for efficiently sequestering Ni and removing it from water.
中文翻译：
基于改性壳聚糖的表面离子印迹材料的制备，用于水溶液中镍离子的高选择性识别和吸附
具有良好耐腐蚀性的镍通常用于电镀。但是，如果镍废水的排放量超过一定水平，将对人类健康和生活环境造成威胁。镍污染物主要来自采矿，冶炼，电镀和其他行业。因此，将它们与废水分离非常重要。一种方法是通过表面压印。在此，壳聚糖，硝酸镍和表氯醇分别用作底物，模板离子和交联剂，以合成用于选择性镍吸附的新型印迹材料。吸附动力学研究表明，在200 min内达到平衡，吸附行为与拟二阶非线性模型良好吻合。吸附量接近20.0 mg·g –1在钴，钙和锰离子存在下，对Ni 2+的选择性分别为56.9、55.2和49.2。另外，聚合物重复使用五次后，吸附能力保持在96.1％。总体而言，印迹聚合物是一种高度选择性的吸附剂，可有效隔离镍并将其从水中去除。
更新日期：2020-03-24
中文翻译：
基于改性壳聚糖的表面离子印迹材料的制备，用于水溶液中镍离子的高选择性识别和吸附
具有良好耐腐蚀性的镍通常用于电镀。但是，如果镍废水的排放量超过一定水平，将对人类健康和生活环境造成威胁。镍污染物主要来自采矿，冶炼，电镀和其他行业。因此，将它们与废水分离非常重要。一种方法是通过表面压印。在此，壳聚糖，硝酸镍和表氯醇分别用作底物，模板离子和交联剂，以合成用于选择性镍吸附的新型印迹材料。吸附动力学研究表明，在200 min内达到平衡，吸附行为与拟二阶非线性模型良好吻合。吸附量接近20.0 mg·g –1在钴，钙和锰离子存在下，对Ni 2+的选择性分别为56.9、55.2和49.2。另外，聚合物重复使用五次后，吸附能力保持在96.1％。总体而言，印迹聚合物是一种高度选择性的吸附剂，可有效隔离镍并将其从水中去除。
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