Adsorpcja Cr(III) na klinoptylolicie naturalnym i modyfikowanym manganem / Rafał Schmidt, Anna Maria Anielak // Zeszyty Naukowe Wydziału Budownictwa i Inżynierii Środowiska. Inżynieria Środowiska ... więcej

Adsorpcja Cr(III) na klinoptylolicie naturalnym i modyfikowanym manganem / Rafał Schmidt, Anna Maria Anielak // Zeszyty Naukowe Wydziału Budownictwa i Inżynierii Środowiska. Inżynieria Środowiska / Politechnika Koszalińska. – 2007, nr 23, s. 503-513 : tab., wykr. – Bibliogr. 8 poz., Streszcz., Abstr. – Tyt. streszcz.: Adsorption of Cr(III) on natural and manganese modified clinoptilolite. – Mat. konf.: VIII Ogólnopolska Konferencja Naukowa na temat: Kompleksowe i szczegółowe problemy inżynierii środowiska = VIII National Polish Scientific Conference on: Complex and detailed problems of environmental engineering, Koszalin–Darłówko, 24-27.05.2007. – Seria gł.: Zeszyty Naukowe Wydziału Budownictwa i Inżynierii Środowiska / Politechnika Koszalińska, ISSN 1640-6249

The paper concerns adsorption of Cr ions from water solution on zeolite-H and zeolite-Mn, from the point of view of applying this method for treatment ofindustrial wastewater with increased Cr concentration. ... więcej

The paper concerns adsorption of Cr ions from water solution on zeolite-H and zeolite-Mn, from the point of view of applying this method for treatment ofindustrial wastewater with increased Cr concentration. Chrome both on (III) and on (VI) degree of oxidation is extremely toxic. Admissible concentration of total Cr in drinking water is on the level 0.05 mg/L in many countries. Process of Cr(VI) removal consists in its reduction to Cr(III) and neutralization in order to precipitate Cr(OH)(3). Also adsorption, ion exchange, membrane and catalytic processes are applied. Calcium and less often sodium hydroxide are used for chemical precipitation. Investigations on application of natural zeolites in the process of heavy metals removal have been carried out for many years. Own investigations consisted in adsorption of Cr(III) ions on natural zeolite in the hydrogen form (zeolite H) and on zeolite modified with manganesedioxide (zeolite Mn). Conducted investigations confirmed considerably better efficiency of Cr(III) removal on zeolite Mn. Efficiency of Cr(III) removal onzeolite Mn at concentration Cr = 100 mg/L calculated on the mass unit is: Zeolite Mn = 220.64 mu g/g, Zeolite H 99.01 mu g/g, so it is 2.5 times larger in comparison to zeolite H. The considerable capacity of Zeolite-Mn in relation to adsorbed Cr(III) ions shows on the possibility of the use of this the material for treatment ofindustrial wastewater with considerable content of Cr in amount of several dozens of mg/L. Application of zeolite Mn eliminates the necessity of applying precipitating compounds. Used up zeolite can be easily and cheap regenerated with 0,3% solution of KMnO4.