Kocasoy Günay, Sahin Vicdan
Boğaziçi University, Institute of Environmental Sciences, Bebek, Istanbul, Turkey.
J Environ Sci Health A Tox Hazard Subst Environ Eng. 2007 Dec;42(14):2139-46. doi: 10.1080/10934520701629617.
Clinoptilolite- a natural zeolite has been investigated for the removal of heavy metals from the wastewaters. A pyrex-glass column of 30 mm diameter and 600 mm height was used. The column was filled with the conditioned clinoptilolite of 0.5-1 mm. In the first stage of the research, synthetic wastewater containing single cation 0.02 N and 0.04 N Cu and 0.02 N Fe and Zn solutions were passed through the column. Two liter of 0.02 N Cu and 750 ml of the 0.04 N Cu solution was treated with 100 percent removal efficiency. Clinoptilolite column was regenerated for the reuse when the removal efficiency decreased. The cation exchange capacities were calculated as 1.0663 and 1.5342 meq/g clinoptilolite for 0.02 N and 0.04 N Cu solutions, respectively. In the second stage of this research, the same procedure was repeated with the actual wastewater samples of the equalization and the neutralization tanks of the Telka-Rabak Electrolytic Copper Industry. A volume of 1811 ml of the wastewater of the equalization tank and 180 ml of the neutralization tank wastewater, which had high concentrations of Ni, Zn, Cu and Fe, was treated with 100 percent efficiency. The cation exchange capacities of clinoptilolite for the wastewater of the equalization and the neutralization tanks for Cu were 0.4483 and 0.4274, respectively. It was observed that only one third of the single copper ion solutions were obtained with the actual wastewater having competing ions such as Zn, Fe and Ni. The experimental results also indicate that the clinoptilolite is an effective cation exchanger for the removal of the metals from the wastewater and the removal efficiency is higher when there is not ant competing ions.
斜发沸石——一种天然沸石，已被研究用于去除废水中的重金属。使用了一个直径30毫米、高600毫米的派热克斯玻璃柱。该柱填充有0.5 - 1毫米的预处理斜发沸石。在研究的第一阶段，含有单一阳离子0.02 N和0.04 N的铜以及0.02 N的铁和锌溶液的合成废水通过该柱。两升0.02 N的铜溶液和750毫升0.04 N的铜溶液被处理，去除效率达100%。当去除效率下降时，斜发沸石柱进行再生以重复使用。对于0.02 N和0.04 N的铜溶液，斜发沸石的阳离子交换容量分别计算为1.0663和1.5342毫克当量/克斜发沸石。在本研究的第二阶段，对特尔卡 - 拉巴克电解铜工业的均衡池和中和池的实际废水样本重复相同程序。1811毫升均衡池废水和180毫升中和池废水（其中镍、锌、铜和铁浓度较高）被处理，去除效率达100%。斜发沸石对均衡池和中和池废水中铜的阳离子交换容量分别为0.4483和0.4274。观察到，对于含有锌、铁和镍等竞争离子的实际废水，仅获得了三分之一的单一铜离子溶液。实验结果还表明，斜发沸石是一种从废水中去除金属的有效阳离子交换剂，并且在没有竞争离子时去除效率更高。
