Abbas Yasir, Majeed Sahresh, Ali Shafqat, Ahmad Hafiz Badaruddin, Akhtar Naeem, Yokota Hiroshi
Water Environ Res. 2018 Dec 1;90(12):2106-2113. doi: 10.2175/106143017X15131012188240.
Arsenic decontamination of drinking water has grabbed significant attention due to arsenic's serious effects on health. A novel gravel-sand filter (GSF) holding zero-valent iron plates was designed and constructed in Muzaffargarh district (Pakistan) for arsenic removal from drinking water with lower iron concentration (0.3 ppm). The GSF efficiently removed arsenic up to 99.99% with long-term stability. The GSF provides 800 liters of arsenic-free drinking water in 39 hours with a rate of 2.5 L/h. A tentative mechanism for arsenic removal is evaluated and described on the basis of oxidation-coagulation-adsorption processes. Chemical composition of underground water is also analyzed and discussed. This GSF design will open a new avenue for arsenic removal and can be extended to other parts of the world.
由于砷对健康有严重影响，饮用水的砷净化已引起广泛关注。在巴基斯坦穆扎法拉格地区设计并建造了一种新型的装有零价铁板的砾石-沙子过滤器（GSF），用于去除铁浓度较低（0.3 ppm）的饮用水中的砷。该GSF能高效去除高达99.99%的砷，并具有长期稳定性。GSF以2.5升/小时的速率在39小时内提供800升无砷饮用水。基于氧化-混凝-吸附过程评估并描述了一种初步的砷去除机制。还对地下水的化学成分进行了分析和讨论。这种GSF设计将为砷去除开辟一条新途径，并可推广到世界其他地区。
