the purpose of this study is comparison of manganese absorption capacity by natural and modified zeolite. for this purpose used by from semnan mines zeolite with mean particle diameter of 360 micrometer. for modified zeolite, 5 g amount of natural zeolite with 100 ml of 1 m sodium chloride solution mixed and maintained at 24 hours in room temperature. for measure specific surface of absorbents,...

this study investigated the photocatalytic behaviors for the nanocomposite of tio2 p25 and semnan natural zeolite in the decomposition of tetracycline under visible light in an aqueous solution. the structural features of the composite were investigated by a series of complementary techniques that included x-ray diffractometer (xrd), fourier transform infrared spectroscopy (ftir), scanning elec...

This study investigated the photocatalytic behaviors for the nanocomposite of TiO2 P25 and Semnan natural zeolite in the decomposition of tetracycline under visible light in an aqueous solution. The structural features of the composite were investigated by a series of complementary techniques that included X-ray diffractometer (XRD), Fourier transform infrared spectroscopy (FTIR), scanning elec...

conclusions the findings of this study showed that the modification of natural zeolites can achieve higher adsorption capacity for organics. in addition, based on the results, natural zeolite being modified with sds as a cationic surfactant had good efficiency for the adsorption of nom. results the results indicated that sds-modified zeolite showed greatly enhanced adsorption capacity. findings...

results the batch kinetics experiments showed that nom adsorption by the adsorbents followed the pseudo-second order model. results showed that the acidic ph is optimum for adsorption of nom by smz. conclusions the findings of this study show that natural zeolite modified with sodium dodecyl sulfate, as a cationic surfactant, is a promising adsorbent for removal of nom. materials and methods in...

background nowadays, adsorption techniques are widely used to remove certain classes of pollutants from water. objectives the aim of this study was to remove ametryn from water solutions by natural zeolite nanoparticles from the semnan region of iran. materials and methods for this purpose zeolite nanoparticles were synthesized from natural zeolite using planetary ball-mill. the zeolite nanopar...

ammonia in air can be hazardous to human and animal life and should be removed from the environment. recently the removal of environmental pollutants such as ammonia by means of natural and modified zeolites has attracted a lot of attention and interests. in this study the capability of three iranian natural zeolites (clinoptilolite) in point of view of removal of ammonia from air was investiga...

ammonia in air can be hazardous to human and animal life and should be removed from the environment. recently the removal of environmental pollutants such as ammonia by means of natural and modified zeolites has attracted a lot of attention and interests. in this study the capability of three iranian natural zeolites (clinoptilolite) in point of view of removal of ammonia from air was investiga...

Nitrogen in the Ammonia form can have deleterious effects in water resources. Ion Exchange by zeolite and biological Nitrification processes are two proposed methods for removing Nitrogen compounds from wastewater and effluents. The main objective of this research was to investigate the efficiency of nitrifying bacteria for regenerating Clinoptilolite zeolite. In this research, the Semnan Clino...

this study deals with the uptake of cd2+ and  mn2+ ions from contaminated water using two iranian natural clinoptilolite-rich tuffs from meyaneh (z-m), and semnan (z-s) regions , and a synthetic zeolite-p from z-m sample (z-p) under static (batch operation) and dynamic (column operation) conditions. to investigate the selectivity of the zeolites toward cd2+ and mn2+ cations, the ion exchange is...