QUESTIONS ON OPTIMIZATION OF HEAVY METALS IONS REMOVAL PROCESS USING THE MODIFIED BIOADSORBENTS
One of widely used methods for removal of heavy metals ions from media is utilization of bioadsorbents. On the basis of held analysis of known results of experimental researches of dependence of adsorption capability and percentage of removed ions on concentration of adsorbent and initial concentration of heavy metals ions it is concluded that there is a fixed value of initial concentration of heavy metals ions upon exceeding of which the adsorption capability increases with increase of concentration of bioadsorbent. Upon decrease of initial concentration of heavy metals ions less than the fixed level following processes occur: 1. The adsorption capability decreases with increase of bioadsorbents concentration. 2. The percentage of removed ions increases with increase of bioadsorbents concentration till some fixed level exceeding of which also lead to decrease of percentage of removal.The carried outoptimization of technological cycle of bioadsorption of heavy metals ions does show that physical-chemical properties of bioadsorption process make it possible to chose such a regime point of technological process upon which all expenditures for obtaining adsorbent and modificator reaches the minimum. The optimization of heavy metal bioadsorption processes series using the bioadsorbents modified in different levels. The condition meeting of which lead to maximum of percentage of removed ions is found. The held experimental researches confirmed the general regularities of dependence of major parameters of bioadsorption process on concentration of adsorbent. These results are used as basis of suggested procedure of op[timization of removal of heavy metal ions using bioadsorbents.