Department of Chemistry, National Sun Yat-sen University, 70 Lien-Hai Rd., Kaohsiung, 80424, Taiwan.
Division of Cardiology, Department of Internal Medicine, Kaohsiung Armed Forces General Hospital, 2 Zhongzheng 1st Rd., Kaohsiung, 80284, Taiwan.
Chemosphere. 2020 Sep;254:126903. doi: 10.1016/j.chemosphere.2020.126903. Epub 2020 Apr 29.
We used discarded oyster shells to prepare vaterite calcium carbonate microparticles and explored the removal effects and the underlying mechanism toward several heavy metal ions. The removal efficiency for each ion type was: Pb (99.9%), Cr (99.5%), Fe (99.3%), and Cu (57.1%). With the exception of Cu, vaterite calcium carbonate particles exhibited excellent removal performance on all tested heavy metal ions, with exceptional results for Pb. The factor affecting the removal efficiency of heavy metal ions is shown to involve an ion exchange reaction between calcium and the heavy metal ions resulting in recrystallization. Vaterite calcium carbonate particles prepared by this method have the advantage of low price, easy synthesis, and reduction of environmental waste. Thus, this procedure for synthesizing vaterite CaCO provides an environmentally responsible method for preparing materials that can be economically incorporated into common consumer products such as household drinking water filtration systems.
我们使用废弃的牡蛎壳来制备文石碳酸钙微颗粒，并探索了其对几种重金属离子的去除效果和作用机制。每种离子类型的去除效率分别为：Pb（99.9%）、Cr（99.5%）、Fe（99.3%）和 Cu（57.1%）。除了 Cu 之外，文石碳酸钙颗粒对所有测试的重金属离子都表现出优异的去除性能，尤其是对 Pb 的去除效果非常显著。影响重金属离子去除效率的因素被认为涉及钙与重金属离子之间的离子交换反应，从而导致再结晶。通过这种方法制备的文石碳酸钙颗粒具有价格低廉、合成简单和减少环境废物的优点。因此，这种合成文石 CaCO 的方法为制备材料提供了一种环境友好的方法，这些材料可以经济地纳入常见的消费品，如家用饮用水过滤系统。
