School of Tea & Food Science and Technology, Anhui Agricultural University/State Key Laboratory of Tea Plant Biology and Utilization, Hefei 230036, Anhui, People's Republic of China.
College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, Jiangsu, People's Republic of China.
Carbohydr Polym. 2017 Mar 15;160:82-89. doi: 10.1016/j.carbpol.2016.12.052. Epub 2016 Dec 23.
In this study, porous corn starch was loaded with Zr, Al, Fe or La to produce the composites PS-Zr, PS-Al, PS-Fe and PS-La. Fluoride adsorption from water was tested at different biosorbent dosages, contact times, solution pH values and initial fluoride concentrations. The biosorbents were characterized by microscopy and spectroscopy. PS-Zr was shown superior defluoridation capacity over a pH range of 3.0-9.0. The adsorption process could be described by the Langmuir isotherm model and the Lagergren pseudo-second-order kinetic model. The maximum fluoride adsorption capacity calculated to be for PS-Zr was 25.41mg/g. Our results revealed that PS-Zr could be employed as an effective biosorbent for removal of fluoride from drinking water.
在这项研究中，多孔玉米淀粉被负载锆、铝、铁或镧，以制备 PS-Zr、PS-Al、PS-Fe 和 PS-La 复合材料。在不同的生物吸附剂剂量、接触时间、溶液 pH 值和初始氟浓度下，测试了从水中吸附氟化物的情况。通过显微镜和光谱法对生物吸附剂进行了表征。PS-Zr 在 pH 值为 3.0-9.0 的范围内表现出优越的除氟能力。吸附过程可以用朗缪尔等温模型和拉格朗日拟二级动力学模型来描述。计算得到 PS-Zr 的最大氟吸附容量为 25.41mg/g。我们的结果表明，PS-Zr 可以用作去除饮用水中氟化物的有效生物吸附剂。
