Removal of manganese by catalytic oxidation and sedimentation

Prisustvo mangana u vodi za piće je nepoželjno. U novije vrijeme se proučavaju napredni oksidacijski procesi za uklanjanje anorganskih spojeva kao što su teški metali iz vode. U radu je otopina mangana obrađivana s Greensandom, Birmom i Piroluzitom. Mangan je određivan spektrofotometrijski pri 565nm. Birm i Piroluzit, kod otopine mangana s vodovodnom vodom, su uklanjali mangan ispod zakonski dozvoljene koncentracije u vodi za pice od 0,05 mgL-1. Nakon prolaska otopine mangana kroz Greensand, povećana je izlazna koncentracija mangana. Birm i Pirulozit uklanjali su mangan ispod 0,05 mgL-1 kada su u vodi prisutni željezo i humusne tvari. Točka proboja kolone kod Piroluzita iznosi 1856 V/Vm kod ulazne koncentracije od 0,2 mgL-1 Mn i 420 V/Vm kod ulazne koncentracije od 2 mgL-1 Mn. Električna provodnost i pH otopine nisu značajnije promijenjene izvođenjem pokusa.Occurrence of manganese in water is undesirable. Recently, advanced oxidation processes are being investigated for removal of inorganic matter such as heavy metals from water. In this work, manganese was treated by Greensand, Birm and Pyrolusite. The concentration of manganese was determined spectrofotometricaly at 565nm. Birm and Pyrolusite removed manganese from tap water to levels below the legal limit of 0.05 mgL-1. After filteration of the manganese solution through Greensand, the level of manganese increased. Birm and Pyrolusite removed manganese below 0.05 mgL-1 also when the water contained iron and humic compunds. The breaking point at which Pyrolusite effectively stops absorbing was 1856 V/Vm when initial concentration was 0.2 mgL-1 Mn and it was 420 V/Vm when initial concentration was 2 mgL-1 Mn. Electric conductivity and pH value of the solution were not significantly altered during experiments