Faculty of Engineering, Environmental Engineering Department, Autonomous University of Yucatan, Av. Industrias no contaminantes por anillo periférico norte, Apdo Postal 150, Mérida, Yucatán, México.
Cinvestav Saltillo, Sustainability of Natural Resources and Energy, Ramos Arizpe, México.
Bull Environ Contam Toxicol. 2020 Dec;105(6):934-940. doi: 10.1007/s00128-020-03036-z. Epub 2020 Nov 2.
The presence of regulated inorganic contaminants in water such as AsO and PO anions, is becoming a relevant environmental research topic. The harm that these anions cause to human health and the ecosystem have been reported in several works. The adsorption processes using low-cost materials, such as zeolites, have proven to be an option to removal hazardous contaminants from water. The coal fly ash, a waste from thermoelectrical plants, offers a raw pollutant material to synthesis an effective adsorbent (Zeolite W). In this research was studied the removal of arsenic and phosphates anions from water, applying a functionalized by iron and zirconium Zeolite W, which was modified using a fast and efficient process through microwave-assisted method (1 min at 150°C). The obtained Zeolite W did not show significant changes in its structure and morphology. The maximum adsorption capacity (Qm expressed in mg g) was found to be 42.31 (Iron-zirconium-zeolite) and 27.82 (Iron-zeolite) for AsO, while it reached 50.89 for PO using Zirconium-zeolite. Results showed that functionalized zeolites are efficient adsorbents for hazardous anionic species; therefore, it could be useful for aqueous effluents remediation.
水中受管制的无机污染物（如砷酸盐和磷酸盐阴离子）的存在正成为一个相关的环境研究课题。这些阴离子对人类健康和生态系统造成的危害已在多项研究中有所报道。使用沸石等低成本材料进行吸附处理已被证明是一种从水中去除有害污染物的有效方法。煤灰是热电厂的废物，它为合成高效吸附剂（沸石 W）提供了一种原始污染物材料。本研究应用经铁和锆功能化的沸石 W 从水中去除砷和磷酸盐阴离子，该沸石 W 通过微波辅助法（在 150°C 下 1 分钟）进行快速高效的改性。得到的沸石 W 在结构和形态上没有明显变化。对于砷酸盐，最大吸附容量（以 mg g 表示的 Qm）分别为 42.31（铁-锆-沸石）和 27.82（铁-沸石），而使用锆沸石则达到 50.89 用于磷酸盐。结果表明，功能化沸石是有害阴离子的有效吸附剂，因此对于水基废水的修复可能很有用。
