基于桔子皮废弃物从含铼废水中高效、高选择地提取钼(英文)

Recovery of Mo(Ⅵ) from Re(Ⅶ)-Containing Wastewater by Chemically Modified Orange Waste:Competitiveness and Selectivity

以生物质废弃物桔子皮为原料,直接氨化后得到OW-NH2生物吸附剂,OW-NH2对Mo髩的吸附具有很高的选择性,对其他共存离子Re(Ⅶ)、Pb(Ⅱ)、Fe(Ⅲ)、Zn(Ⅱ)、Mn(Ⅶ)、Ca(Ⅱ)和Cu(Ⅲ)基本不吸附,尤其是对Mo(Ⅵ)、Re(Ⅶ)的分离具有高选择性。红外光谱分析表明阴离子形式的H3Mo7O243-、H2Mo7O244-、HMo7O245-、Mo8O264-、Mo7O246-和MoO42-与引入在纤维素上的RNH3+发生离子缔合反应。OW-NH2吸附Mo(Ⅵ)的过程符合Langmiur吸附模型,最大吸附量为1.71 mmol·g-1。另外,OW-NH2对工业实际料液的动态模拟实验的结果表明Mo(Ⅵ)回收率可达99%以上。

New adsorption gel （OW-NH2） was prepared by chemicall orange waste. For the system of Mo（Ⅵ） coexisted with Re（Ⅶ）, Pb（Ⅱ）, Fe y immobilizing functional group of amine （Ⅲ）, Zn（Ⅱ）, Mn（Ⅶ） Ca（Ⅱ） and Cu（Ⅱ）, the gel exhibits selectivity only for Mo（VD. The maximum adsorption capacity for Mo（Ⅵ） is 1.71 mmol .g-l, and the adsorption behavior obeys the Langmuir model. The adsorption mechanism of molybdenum anion could be explained as the anion exchange reactions. In addition, the excellent adsorption characteristics for Mo（Ⅵ） are confirmed by separation of Mo（VI） from Mo-Re containing industrial effluent.