Vodotehnika d.d. Koturaska 49, Zagreb, Croatia.
J Hazard Mater. 2010 Jun 15;178(1-3):572-7. doi: 10.1016/j.jhazmat.2010.01.123. Epub 2010 Feb 1.
The removal of ammonium from the Valpovo region ground water (VGW) with the use of natural clinoptilolite samples from the Donje Jesenje deposit (Croatia) and the Zlatokop deposit in Vranjska Banja (Serbia) was studied. The natural Serbian (SZ) and Croatian zeolites (CZ) were transformed to the Na-form (Na-CZ and Na-SZ) in order to increase the exchange capacity of zeolite. The CZ and SZ theoretic ammonium sorption capacities were 24.24 mg NH(4)(+)/g CZ and 32.55 mg NH(4)(+)/g SZ, respectively. The application of natural and Na-form of clinoptilolite for efficient removal of ammonium ions from VGW was further investigated. For that purpose, the four "filter guard" vessels filled with zeolite samples were set in parallel in the ground water purification pilot plant. The complete ammonium removal, with the use of SZ and Na-SZ was achieved during 20 h. After having observed saturation of clinoptilolite, the samples were regenerated with the use of 2 mol/L NaCl, and reused for determination of ammonium sorption efficiency. The regenerated samples showed to be still very efficient for NH(4)(+) removal and, in addition, the SZ was shown as superior for ammonium removal in comparison to the CZ.
采用来自克罗地亚 Donje Jesenje 矿床（SZ）和塞尔维亚 Vranjska Banja 的 Zlatokop 矿床（CZ）的天然斜发沸石样品，研究了从瓦尔波沃地区地下水（VGW）中去除铵的过程。为了提高沸石的交换容量，将天然塞尔维亚（SZ）和克罗地亚沸石（CZ）转化为 Na 型（Na-CZ 和 Na-SZ）。CZ 和 SZ 的理论铵吸附容量分别为 24.24 mg NH(4)(+)/g CZ 和 32.55 mg NH(4)(+)/g SZ。进一步研究了天然和 Na 型斜发沸石在从 VGW 中有效去除铵离子方面的应用。为此，在地下水净化中试工厂中并排设置了四个装满沸石样品的“过滤保护”容器。使用 SZ 和 Na-SZ 在 20 小时内完成了完全去除铵。在观察到斜发沸石饱和后，使用 2 mol/L NaCl 对样品进行再生，并再次用于测定铵吸附效率。再生样品对于 NH(4)(+)的去除仍然非常有效，并且与 CZ 相比，SZ 显示出对铵去除的优越性。
