Laboratory of Green Chemistry, School of Engineering Science, Lappeenranta University of Technology, Sammonkatu 12, FI-50130 Mikkeli, Finland.
Department of Environmental and Biological Sciences, University of Eastern Finland, P.O. Box 1627, FI-70211, Kuopio, Finland.
Int J Biol Macromol. 2018 Oct 15;118(Pt A):903-912. doi: 10.1016/j.ijbiomac.2018.06.095. Epub 2018 Jun 30.
A novel hydroxyapatite-bentonite clay-nanocellulose (CHA-BENT-NCC) composite material was successfully prepared as adsorbent for the removal of Ni, Cd and PO from aqueous solutions. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive analysis of X-rays (EDAX), X-ray diffraction analysis (XRD) and Fourier-transform infrared spectroscopy (FTIR) were used for characterization of the adsorbent. The effect of pH, contact time, temperature, and initial adsorbate concentration were studied for optimization purpose. The adsorption behavior of the investigated ions were well described by the Freundlich adsorption model, and the maximum adsorption capacity for Ni, Cd and PO was estimated to be 29.46 mmol/g, 10.34 mmol/g and 4.90 mmol/g, respectively. Desorption efficiency was achieved by treatment with 0.01 M HNO for metals and 0.10 M NaOH for PO. Five adsorption-desorption cycles were performed without significant decrease in adsorption capacities. The CHA-BENT-NCC material proved to be a very effective adsorption material for the treatment of mining water also from a copper mine in Finland.
一种新型的羟基磷灰石-膨润土-纳米纤维素（CHA-BENT-NCC）复合材料被成功制备为用于从水溶液中去除 Ni、Cd 和 PO 的吸附剂。采用扫描电子显微镜（SEM）、透射电子显微镜（TEM）、X 射线能谱分析（EDAX）、X 射线衍射分析（XRD）和傅里叶变换红外光谱（FTIR）对吸附剂进行了表征。研究了 pH 值、接触时间、温度和初始吸附质浓度对优化的影响。所研究离子的吸附行为很好地符合 Freundlich 吸附模型，Ni、Cd 和 PO 的最大吸附容量分别估计为 29.46mmol/g、10.34mmol/g 和 4.90mmol/g。用 0.01M HNO 处理金属和 0.10M NaOH 处理 PO 可实现解吸效率。进行了五次吸附-解吸循环，吸附容量没有明显下降。CHA-BENT-NCC 材料被证明是一种非常有效的吸附剂，可用于处理采矿废水，包括来自芬兰的一个铜矿的废水。
