新型 MgS 掺杂纤维素纳米纤维对工业废水中 Cd(II)去除的性能 - 机理与优化。
Performance of novel MgS doped cellulose nanofibres for Cd(II) removal from industrial effluent - mechanism and optimization.
机构信息
Centre for Environmental Science and Engineering, Indian Institute of Technology Kanpur, Kanpur, U. P., 208016, India.
Department of Environmental Science and Technology, Banaras Hindu University, Varanasi, U.P., 221005, India.
出版信息
Sci Rep. 2019 Sep 2;9(1):12639. doi: 10.1038/s41598-019-49076-2.
Green environment friendly and novel nano MgS decorated cellulose nanofibres (MgS@CNF) were prepared, characterized and evaluated towards the removal of heavy metal namely, cadmium from aqueous solutions. Cellulose nanofibres acted as a template for effective dispersion of MgS nanoparticles and also aid in the complexation of cadmium ions. In depth X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD) and Fourier transform infra red spectroscopy (FTIR) studies revealed that doped MgS on mild acidification yields insitu production of HS which effectively complexes cadmium ion to form cadmium sulfide. The reaction followed pseudo first order kinetics with regression coefficient in the order of 0.98. A very high Langmuir adsorption capacity in the order of 333.33 mg/g was obtained for MgS@CNF. Finally, MgS@CNF was applied towards the removal of cadmium from organic and TDS rich tannery waste water. MgS@CNF was effective in bringing down the concentration from ppm to ppb levels.
制备、表征并评价了绿色环保的新型纳米 MgS 修饰纤维素纳米纤维（MgS@CNF），用于从水溶液中去除重金属，即镉。纤维素纳米纤维作为 MgS 纳米颗粒有效分散的模板，同时有助于镉离子的络合。深入的 X 射线光电子能谱（XPS）、X 射线衍射（XRD）和傅里叶变换红外光谱（FTIR）研究表明，在温和酸化条件下掺杂 MgS 会原位生成 HS，有效地将镉离子络合形成硫化镉。反应遵循拟一级动力学，回归系数在 0.98 左右。MgS@CNF 获得了非常高的朗缪尔吸附容量，约为 333.33mg/g。最后，MgS@CNF 被应用于从富含 TDS 的有机制革废水中去除镉。MgS@CNF 能够有效将浓度从 ppm 降低到 ppb 水平。
Zotero 插件