Preparation of adsorbents for hydrogen sulfide absorption from thermal waters

Author: sopio jalaghania
Keywords: Adsorption, hydrogen sulfide, thermal waters, clinoptilolite, activated carbon, purification
Annotation:

Thermal waters are a cheap, environmentally safe, stable and uninterrupted source of energy, its use plays an important role in combating climate change, improving ambient air. Georgia is rich in geothermal waters. More than 300 thermal water wells are registered. Their debit is 220–250 ml m3 / year, but their widespread use is limited by the presence of hydrogen sulfide (H2S) and dissolved hydrosulfide ion (HS-) in water at 5–18 mg / L (norm 0.03 mg / L). Both of these forms of hydrogen sulfide are characterized by toxicity and cause corrosion. Because of this, the population refuses to use thermal water. Existing cleaning methods are multi-step and expensive. The general aim of the research is therefore: to develop environmentally safe thermal water treatment technology in the form of adsorbents using cheap local materials activated carbon and Tedzami zeolite clinoptilolite (CL). At this stage of the study, adsorbents were developed for the absorption of hydrogen sulfide from thermal waters. Modification was done by triple acid treatment with 1N HCl 80-900C, then by appropriate combination of previously unused acid and heat treatment with the corresponding metal salt with wet grinding. The chemical content of the obtained decioned (De), iron, copper and manganese samples was determined by maintaining the ISO and structure of the analysis by RDA methods. A coal diffractogram was also taken. X-ray analysis made it possible to determine that the studied coal is characterized by a micro-homogeneous (heterogeneous) structure. Diffractometric measurements of zeolites indicate the presence of impurities of quartz, montmorillonite, field slope. The content of clinoptilolite in the initial sample reached 80%. Fairly rigid decathonization causes partial amorphization of the structure, disappearance and displacement of some reflexes. But the introduction of copper and iron ions contributes to the inverted structuring of zeolite. This is indicated by fluorescent spectra - the arrangement of iron and copper ions in the pores is regulated.