adsorption capacity

The possibility and effectiveness of using a natural sorbent – peat from the Vereshchytsia-Yanivske deposit for treating agricultural wastewater with a high urea content – has been studied. The humidity and moisture content of the upland and lowland types of peat from this peatland were determined. Comparing these indicators made it possible to establish that the lowland peat has a significantly higher humidity and moisture content. The adsorption capacities of wet and dried types of peat for urea were studied and compared.

A solid-phase material based on modified chitosan using tripolyphosphate (TPP) and ethylene glycol diglycidyl ether (EGDE) as a crosslinker has been prepared, and its ability in adsorbing Cr(VI) has been examined. In this work, a chitosan flake was shaped into beads using TPP, and its chemical stability was improved through reaction with EGDE as the crosslinker. Some parameters that may influence the product, such as composition and immersion time, were systematically studied to obtain the optimum conditions. The obtained material was characterized using SEM and FT-IR.