Muammer Kaya

Bio: Muammer Kaya is an academic researcher from Eskişehir Osmangazi University. The author has contributed to research in topics: Leaching (metallurgy) & Sulfuric acid. The author has an hindex of 11, co-authored 44 publications receiving 618 citations. Previous affiliations of Muammer Kaya include McGill University.

The Effect of Froth on Flotation Kinetics-A Mass Transfer Approach

Abstract: The effect of gas rate and froth thickness on the kinetics of transfer in the froth phase of laboratory semi-batch and continuous laboratory cells is described. Increasing froth thickness increases the dropback constant from the froth to the slurry, and decreases transfer rate constant into the concentrate. Increasing gas rate increases both the dropback constant and the froth transfer constant Hydraulic entrainment increases with increasing gas rate and decreasing froth thickness. A reasonable compromise that minimizes hydraulic entrainment and maximizes recovery of hydrophobic particles is the use of higher gas rate and froth thickness Preliminary testwork with wash water added to the froth yielded rejection of fine liberated gangue of up to 70%, at wash water superficial rates of 0.05-0.08 cm/s. Rejection is highly correlated to the rejection of feed water from the concentrate.

Electronic Waste and Printed Circuit Board Recycling Technologies

Abstract: This chapter introduces the definition, classification, and fundamentals of e-waste, which is the fastest growing waste stream in the world and grows three times faster than the municipal waste. Significance and characteristics of waste electrical and electronic equipment (WEEE) and e-waste, which contain both valuable inorganic/ organic materials and hazardous substances, are clarified. Harmful effects of toxic material and possible adverse health effects are covered. History and cornerstones of e-waste problem and recycling are reviewed. Representative sample preparation, sampling, and analysis for e-waste are described. Lifecycle of electronics and e-waste management hierarchy are given. Life cycle assessment and life cycle management principles, steps, and tools are defined. Objectives of waste printed circuit board (WPCB) and e-waste recycling opportunities are presented. General driving forces, concerns, and challenges for e-waste processing are expressed. E-waste recycling protects environment, saves energy, and conserves resources.

Toward sustainable and systematic recycling of spent rechargeable batteries

Abstract: Ever-growing global energy needs and environmental damage have motivated the pursuit of sustainable energy sources and storage technologies. As attractive energy storage technologies to integrate renewable resources and electric transportation, rechargeable batteries, including lead–acid, nickel–metal hydride, nickel–cadmium, and lithium-ion batteries, are undergoing unprecedented rapid development. However, the intrinsic toxicity of rechargeable batteries arising from their use of toxic materials is potentially environmentally hazardous. Additionally, the massive production of batteries consumes numerous resources, some of which are scarce. It is therefore essential to consider battery recycling when developing battery systems. Here, we provide a systematic overview of rechargeable battery recycling from a sustainable perspective. We present state-of-the-art fundamental research and industrial technologies related to battery recycling, with a special focus on lithium-ion battery recycling. We introduce the concept of sustainability through a discussion of the life-cycle assessment of battery recycling. Considering the forecasted trend of a massive number of retired power batteries from the forecasted surge in electric vehicles, their repurposing and reuse are considered from economic, technical, environmental, and market perspectives. New opportunities, challenges, and future prospects for battery recycling are then summarized. A reinterpreted 3R strategy entailing redesign, reuse, and recycling is recommended for the future development of battery recycling.