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Mercury Removal From Aqueous Solution Using Natural, Synthetic, And Modified Zeolites, Mahshid Attari
Mercury Removal From Aqueous Solution Using Natural, Synthetic, And Modified Zeolites, Mahshid Attari
Electronic Thesis and Dissertation Repository
Mercury has been recognized as one of the most hazardous heavy metals. The discharge of effluents containing mercury in soil, sediments and water can inflict an irreversible harm to the environment and human health. In this work, zeolitized coal fly ash as well as gold and gold-iron modified zeolites were successfully employed for mercury removal from a typical industrial wastewater. X-ray diffraction (XRD), thermo-gravimetrical analyses (TGA), surface area measurement (BET), and scanning electron microscopy (SEM-EDX) were utilized to explore the characteristics of the raw and modified zeolites. A pseudo-second-order kinetic model was identified to best represent the kinetic data for …
Solar Photocatalytic Reduction Of Zn2+ Using Graphene-Based Tio2 Composite Catalyst For Application To Cso Treatment, Gloria Kumordzi
Solar Photocatalytic Reduction Of Zn2+ Using Graphene-Based Tio2 Composite Catalyst For Application To Cso Treatment, Gloria Kumordzi
Electronic Thesis and Dissertation Repository
The improvement of photocatalyst efficiency in utilizing the majority of wavelengths in the solar spectrum, an abundant natural resource, presents the next step in the large scale application of photocatalysis for the treatment of dissolved organic and inorganic pollutants in wastewater. In this study, a composite catalyst of TiO2 and Graphene synthesized by a hydrothermal treatment method is used to photo-reduce Zn2+, the most abundant heavy metal found in combined sewer overflows (CSOs). The performance of this composite catalyst was assessed under various process conditions such as pH, light intensity, catalyst loading and light source. The TiO …