Kirisenage Priyalatha M, Zulqarnain Syed M, Myers Jordan L, Fahlman Bradley D, Mueller Anja, Marquez Itzel
Department of Chemistry and Biochemistry, Central Michigan University, Mount Pleasant, MI 48859, USA.
School of Engineering and Technology, Central Michigan University, Mount Pleasant, MI 48859, USA.
Polymers (Basel). 2022 Aug 2;14(15):3146. doi: 10.3390/polym14153146.
The presence of arsenic and ammonia in ground and surface waters has resulted in severe adverse effects to human health and the environment. Removal technologies for these contaminants include adsorption and membrane processes. However, materials with high selectivity and pressure stability still need to be developed. In this work, adsorbents and adsorptive membranes were prepared using nanostructured graphitic carbon nitride decorated with molecularly imprinted acrylate polymers templated for arsenate and ammonia. The developed adsorbent removed arsenate at a capacity and selectivity similar to commercial ion-exchange resins. Ammonia was removed at higher capacity than commercial ion exchange resins, but the adsorbent showed lower selectivity. Additionally, the prepared membranes removed more arsenate and ammonia than non-imprinted controls, even in competition with abundant ions in water. Further optimization is required to improve pressure stability and selectivity.
地下水和地表水中砷和氨的存在已对人类健康和环境造成严重不利影响。去除这些污染物的技术包括吸附和膜工艺。然而，仍需要开发具有高选择性和压力稳定性的材料。在这项工作中，使用装饰有针对砷酸盐和氨的分子印迹丙烯酸酯聚合物的纳米结构石墨相氮化碳制备了吸附剂和吸附膜。所开发的吸附剂去除砷酸盐的容量和选择性与商业离子交换树脂相似。氨的去除容量高于商业离子交换树脂，但吸附剂的选择性较低。此外，即使在与水中大量离子竞争的情况下，制备的膜去除的砷酸盐和氨也比非印迹对照更多。需要进一步优化以提高压力稳定性和选择性。
