Banfalvi Gaspar
Department of Animal Anatomy and Physiology, University of Debrecen, 1 Egyetem Street, Debrecen 4010, Hungary.
Chemosphere. 2006 May;63(7):1231-4. doi: 10.1016/j.chemosphere.2005.08.066. Epub 2005 Nov 17.
The necessity of heavy metal removal from wastewater has led to increasing interest in absorbents. We have developed a new approach to obtain high metal adsorption capacity by precipitating metal sulfides with sodium sulfide on the surface of bentonite and adhere them to the absorbent. This method allowed to remove approximately 90% of cadmium as CdS from 10(-4)-10(-6) M CdCl2 solutions. Additional reactions are related to the removal of excess sodium sulfide by the release of hydrogen sulfide and oxidation to sulfur using carbogen gas (5% CO2, 95% O2) followed by aeration.
从废水中去除重金属的必要性引发了人们对吸附剂的日益关注。我们开发了一种新方法，通过在膨润土表面用硫化钠沉淀金属硫化物并将其附着在吸附剂上，以获得高金属吸附容量。该方法能够从10⁻⁴ - 10⁻⁶ M的CdCl₂溶液中以CdS的形式去除约90%的镉。额外的反应涉及通过释放硫化氢去除过量的硫化钠，并使用混合气体（5% CO₂，95% O₂）将其氧化为硫，随后进行曝气。
