Structural investigation of raw clinoptilolite over the Pb2+ adsorption process from phosphoric acid
Physico-chemical methods are the most informative studies for natural zeolites. In the present study, zeolite derivative material called as clinoptilolite was employed for the purpose of adsorption. The lead ions (Pb2+) were investigated for removability from phosphoric acid (H3PO4) medium by clinoptilolite. Many works including heavy metal adsorptions of zeolite material from aqueous medium have previously conducted by many researchers but the acid medium experiments haven't been studied yet. Accordingly, this put forth the novelty of work. The clinoptilolite was employed for purification of phosphoric acid from lead ions. The structure durability and reusability of clinoptilolite after acid treatment was also evaluated. The spectral data which were collected by FT-IR, TGA/DTA, SEM, BET, XRD, and ATM make it possible to obtain exact information about changing on clinoptilolite structure. Thus, the clinoptilolite species such as natural, acid-treated, and isolated after sorption were structurally investigated. And the Pb2+ cation sorption capability of clinoptilolite was discussed. It has demonstrated that clinoptilolite is a versatile material also for the purification of acid from heavy metal ions.