以聚合物阴离子交换树脂D201为载体,将纳米氧化铈(NCO)载入D201孔道内,制备出复合纳米吸附剂NCO@201,并用于酸性废水中氟的深度去除。结果表明,NCO@201具备良好的稳定性,能够在酸性水环境中长期稳定使用;溶液pH对NCO@201的除氟性能有较大影响,酸性条件下(pH=3,氟初始质量浓度为 10 mg/L)其最大除氟吸附量可达17.67 mg/g;NCO@201在高浓度竞争离子环境中对氟具有优异的吸附选择性。吸附动力学表明,酸性环境下NCO@201对氟的吸附可在180 min内达到平衡。NCO@201吸附饱和后可采用NaOH溶液进行脱附再生。

Taking D201 porous polymer anion exchanger as a carrier,NCO@201,a novel nanocomposite adsorbent,is synthesized by impregnating nanosized cerium oxides (NCO) into the channels of D201 through the technical route of "CE precursor adding-in situ alkali deposition".NCO@201 samples are used for efficient removal of fluorine from acidic wastewater.NCO@201 is found to have an excellent resistance to acid and alkali environment,allowing it to be utilized in a wide pH range.Fluorine adsorption by NCO@201 is a pH-dependent process with maximum adsorption capacity of 17.67 mg·g^-1 when pH is 3.0 and the initial concentration of fluorine is 10 mg·L^-1.Meanwhile,NCO@201 shows conspicuous adsorption affinity to fluorine in the coexistence of other competing anions with high concentration.Adsorption kinetics confirms its high efficiency for achieving equilibrium within 180 min.The exhausted NCO@201 can be effectively revived by sodium hydroxide solution for cyclic utilization without significant capacity loss.

唐欢(1997-),女,硕士研究生,主要从事污水深度处理等方面的研究,archertanghuan@163.com