Structural of natural and modified sorbents Characterization of chromium, zinc, lead and heavy metals Cadmium for surface water treatment

Author: Nino Gagniashvili
Keywords: zeolites, heavy metals, Mordenite, sorbtion
Annotation:

Environmental pollution with heavy metals is one of the most pressing environmental problems worldwide today, including in Georgia.Heavy metals, such as lead, cadmium, chromium and zinc are major anthropogenic environmental pollutants. These heavy metals significant threat to both environment and public health, form stable complexes, are non-biodegradable, can be easily dissolved in water and meets in the food chain of living organisms.Thus, their removal becomes inevitable and in this endeavor, absorption seems to be a promising alternative for treating metal contaminated waters. In this study we would use natural zeolite–Mordeniteas asorbent, which is found in Georgia. The work presents the natural zeolite mordenite as a heavy metals adsorbent, the results of the modification and chemical analysis and physico-chemical research. Initial mordenite is resistant to both acid and alkali processing – practically didn’t changed silicate module, acid processing has led to the release from the channels the calcium only. XR results showed that the initial zeolite contained quartz, which was slightly dissolved when treated with an alkaline mixture. The most intense absorption line in the area is 1047-1056 cm-1 and responds to Si - O - Si bond oscillation, and 466.95 cm-1 strip - to Al - O4 deformation oscillations of the structural unit. The presence absorption bands in the range 3100-3700 cm-1indicates to zeolite water. That is, more drastic modification conditions are needed to achieve more drastic structural changes and deeper decationation.