Bioremediation of Chromium Based on Macrophytes
Annotatsiya
No research has yet been conducted in the field of wastewater treatment of tanneries containing a high concentration of chromium biologically using high algae in the Republic of Uzbekistan.That is why the treatment of wastewater from tanneries as well as waters purified by physico-chemical way requires adaptation of biological purification and has great scientific, practical and environmental significance.This article examines the tolerance of high algae, namely Azolla caroliniana, adapted to chrome-plated water in concentrations up to 30%, under artificial conditions, in polluted Artisian waters with different concentrations of chromium, as well as with the addition of wastewater from enterprises. In 5 days, the photosynthesis of the Azolla сaroliniana culture adapted to chrome-plated wastewater (30%) was restored to 50-80 %. During the entire time of growing Azolla caroliniana (7 days), there was a three-fold increase in culture than at the beginning of the experiment, and the reproduction rate reached 78.4-82.6%During the study, the level of tolerance of Azolla caroliniana to chromium was considered. As a result of the data obtained, an increase in Azolla caroliniana algae tolerant to wastewater contaminated with chromium (30%) was recorded by 3 times on the 7th day of the experiment. On the 5th day of the experiment, the photosynthesis of Azolla caroliniana was restored to 50-80%, and the reproduction of the culture reached 78.4-82.6%. As a result, the wastewater was purified from chromium from 4.87 mg/l to 2.34 mg/l.According to the obtained results, sorption of chromium by Azolla caroliniana gives averages 0.56-1.09mg/g relative to the dry mass.