Treatment of water contaminated with heavy metals with bioadsorbent

Azerbaijan State University of Oil and Industry, 20, Azadlig Avenue, Baku, AZ1010, Azerbaijan

^* Corresponding author: abdullayeva-1974@inbox.ru

Abstract

The article presents a process for cleaning heavy metals (Cu and Zn ions) discharged into water bodies with banana peel waste. A comparative analysis of a bi-adsorbent made from banana peel waste and a traditional adsorbent, activated carbon, was performed. It was found that the ability of the prepared bio-adsorbent to adsorb Cu and Zn ions differs only slightly from that of the traditional adsorbent. The experiments were conducted with bio-adsorbents impregnated with sodium hydroxide solution of various concentrations as a modifier and carbonized at different temperatures. It was found that bi-adsorbents impregnated with 60% sodium hydroxide solution and carbonized at 240 0 C were more effective. It was found that the prepared bio-adsorbent can remove 97.5% and 98.5% of Cu and Zn ions, respectively, from water. And analyzed The spectral characteristics of the bioadsorbent were measured using Fourier transform infrared (FTIR) spectrometer, and the concentration of metal ions was measured using atomic absorption spectrophotometer (AAS). The arboxyl and hydroxyl functional groups, as well as the oxygen group O=C=O, which are important for adsorption, were confirmed by FTIR. It was suggested that the bioadsorbent obtained from biomass can be used as an adsorbent due to its large surface area, rich resource, various surface groups, cost-effectiveness and environmental safety.