Experimental research on sorption of Pb²+, Zn²+, Cu2+, Mn²+, Ni²+, Na+, Ca²+ and Cl- from solutions on clinoptilolite

Abstract

The main goal for runoffs cleaning from heavy metals in the road environment should be focused on in situ remediation techniques, which serve for the fraction reduction of toxic elements that is potentially mobile or bioavailable. In this regard, naturally occurring zeolite is the appropriate technique for the heavy metals removing from aqueous medium. This paper presents the results of the investigations on sorption of Pb²+, Zn²+, Cu2+, Mn²+, Ni²+, Na+, Ca²+ and Cl- from solutions on clinoptilolite. The source of mentioned above heavy metals in a roadside environment is a motor transport. Sodium and calcium chlorides appear from the de-icing salts used on roads. There are some studies done in removal of heavy metals from water by means of natural zeolites. And it was noticed that there is a strong relationship between trace metal mobilization and de-icing salts. The influence of NaCl and CaCl2 for heavy metal sorption from solution by clinoptilolite is investigated and presented in this paper.