فهرست مطالب

Journal of Chemical Reviews
Volume:1 Issue: 4, Autumn 2019

  • تاریخ انتشار: 1398/07/09
  • تعداد عناوین: 5
|
  • Dana Mohammadnazar *, Amir Samimi Pages 252-259
    Today, diseases and accidents on one of the social concerns of workers and those involved in occupational safety and health issues has become. In addition to the general culture of health and safety factors related to non-compliance with relevant laws and regulations and lack of education can be a lack of planning and attention to occupational health and safety of workers in most industries, including the reasons for the high rate of accidents and work-related disease outlined. Due to the importance of the health of workers in all countries need to manage to achieve a coherent approach to improve working conditions, more than ever appears. Safety position in the heart of the organization's current management and its elements such as organizational structure, planning activities, responsibilities specified in the methods of work according to the resources available to maintain the policy of health, Safety and the environment is working. Maybe HSE management concept is abet complex in first glance. But this is simple concept and it has close relationship with us and we understand simple city. Maybe hygienic, security and environment concepts and not simple for you. HSE management increase hygienic awareness, security and environment level and decrease dangerous factors and event occurrence and it is possible with workspace security. HSE position is in the organization current heart and elements like organizational structures, activities planning, determine responsibility in methods for doing and try for hygienic way maintain, security and environment. In this paper discussed HSE significance in Iran oil industry.
    Keywords: diseases, accidents, HSE, Work Environment Security, Environment, Health, safety factors
  • Trupti Pagar, Suresh Ghotekar *, Khanderao Pagar, Shreyas Pansambal, Rajeshwari Oza Pages 260-270
    Developing a rapid, reliable and eco-accommodating methodology for the synthesis of metal/metal oxide nanoparticles (NPs) is an important step in the area of nanotechnology. Cobalt oxide nanoparticles (Co3O4 NPs) have been widely studied due to their potential applications including, antibacterial, antifungal, electrochromic sensors, heterogeneous catalysis, and energy storage devices. Due to the large rate of perilous chemicals employed in the physical and chemical production of these NPs, green methods employing the use of plants, fungus, algae, and bacteria have been adopted. However, plant-mediated synthesis of metal NPs has been developed as a substitute to defeat the restrictions of conventional synthesis approaches such as physical and chemical methods. Biomolecules, such as tannins, saponins, proteins, amino acids, steroids, enzymes, flavonoids, and vitamins from several plant extracts have been used as a stabilizing and reducing agents for the synthesis of Co3O4 NPs. Recently, several attempts were made to develop plant-mediated synthesis methods to produce stable, cost-effective, and eco-accommodating Co3O4 NPs. In this review, a comprehensive study was conducted on synthesis, characterization, and various applications of Co3O4 NPs produced using various plant sources.
    Keywords: Green synthesis, Plant extracts, Nanotechnology, Co3O4 NPs, applications
  • Niket Powar, Rajkumar Pandav * Pages 271-281
    Energy problem is one of the serious concerns in modern society; therefore, we have to take hastily an effective action. Hence, researchers are looking for some attractive materials with low-cost, lightweight, and environmentally effective. Recently, 2D materials have taken notable recognition in the field of materials science for multiple energy application, because of its unique electronic and optical properties; and borophene is one of the 2D material which is commendatories than graphene. However, it has not much experimentally explored yet. This review discusses the synthesis process of borophene and discussed energy-related application such as energy storage, optoelectronic, photocatalytic activity, and hydrogen storage. Moreover, this work provides a summary of each application that could help to understand the importance of borophene materials for energy applications.
    Keywords: Borophene, Energy Storage, Optoelectronic, Hydrogen storage, Photocatalytic activity
  • Tejas Suma Shyam *, Hazel Dhruve Pages 282-286
    Rhodium is a rare and highly expensive metal with widespread and diverse industrial applications. This makes rhodium recovery and recycling extremely important. Various processes and methods have been developed for rhodium recovery which are very specific to the nature of the application of rhodium.  This research study aims at providing a brief yet holistic, classified overview of the many methods that are being employed over the last few decades for rhodium recovery at both laboratory and industrial scale. Specifically, the focus is on the processes employed for recovery of rhodium from waste water, radioactive waste, catalysts, scrap and by leaching with the objective of facilitating a better understanding of such methods. This research study enables researchers to better understand the various processes employed in rhodium recovery.
    Keywords: Rhodium recovery, Rhodium leaching, Recycling
  • Onesmus Mulwa Munyao *, Joseph Karanja ThiongO, Jackson Muthengia Wachira, Daniel Karanja Mutitu, Mwirichia Romano, Genson Murithi Pages 287-299

    Deleterious ions in the environment such as sulfates may degrade the concrete structures. The interaction of cement hydration products with these destructive agents contributes to severe durability threat of the concrete structures. External sulfate attack is well-known for causing permanent changes in concrete. Microbially induced calcium carbonate (MICP) precipitation has been considered as a unique technique in enhancing the durability properties of concrete. This review paper discusses the possibility of bio-deposition from MICP process as a barrier in microbial treated concrete against the penetration of sulfate ions in a sulfate- rich environment. The effect associated with chemical and physical sulfate attack is discussed in line with the mechanical properties of cement such as compressive strength whereas microscopic evaluation is based on scanning electron microscopy studies. The shortcomings associated with sulfate ions in cement-based materials and the positive effects of incorporating bacillus species bacteria in sulfate rich areas is discussed. This review found that, MICP can significantly reduce the ingress of sulfate ions in cement-based materials, which results in improving the mechanical properties of the cement mortar/concrete.

    Keywords: Sulphate attack, MICP, Bacteria, Concrete, degradation