Chemical Engineering / Kimya Mühendisliği

Permanent URI for this collectionhttps://hdl.handle.net/11147/14

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Access type: Open accessSubject: search.filters.subject.Risk assessment

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  • Article
    Citation - WoS: 32
    Citation - Scopus: 36
    A Review of Boron Removal From Aqueous Solution Using Carbon-Based Materials: an Assessment of Health Risks
    (Elsevier, 2022) Gören, Ayşegül Yağmur; Gören, Ayşegül Yağmur; Karagündüz, Ahmet; Recepoğlu, Yaşar Kemal; Yoon, Yeojoon; 03.07. Department of Environmental Engineering; 03.02. Department of Chemical Engineering; 03. Faculty of Engineering; 01. Izmir Institute of Technology
    Carbon-based compounds have gained attention of researchers for use in boron removal due to their properties, which make them a viable and low cost adsorbent with a high availability, as well as environmental friendliness and high removal efficiency. The removal of boron utilizing carbon-based materials, including activated carbon (AC), graphene oxide (GO), and carbon nanotubes (CNTs), is extensively reviewed in this paper. The effects of the operating conditions, kinetics, isotherm models, and removal methods are also elaborated. The impact of the modification of the lifetime of carbon-based materials has also been explored. Compared to unmodified carbon based materials, modified materials have a significantly higher boron adsorption capability. It has been observed that adding various elements to carbon-based materials improves their surface area, functional groups, and pore volume. Tartaric acid, one of these doped elements, has been employed to successfully improve the boron removal and adsorption capabilities of materials. An assessment of the health risk posed to humans by boron in treated water utilizing carbon-based materials was performed to better understand the performance of materials in real-world applications. Furthermore, the boron removal effectiveness of carbon-based materials was evalu ated, as well as any shortcomings, future perspectives, and gaps in the literature.
  • Article
    Citation - WoS: 108
    Citation - Scopus: 113
    Spatial and Seasonal Variations, Sources, Air-Soil Exchange, and Carcinogenic Risk Assessment for Pahs and Pcbs in Air and Soil of Kutahya, Turkey, the Province of Thermal Power Plants
    (Elsevier Ltd., 2017) Dumanoğlu, Yetkin; Gaga, Eftade O.; Sofuoğlu, Sait Cemil; Sofuoğlu, Sait Cemil; Odabaşı, Mustafa; 03.07. Department of Environmental Engineering; 03. Faculty of Engineering; 01. Izmir Institute of Technology
    Atmospheric and concurrent soil samples were collected during winter and summer of 2014 at 41 sites in Kutahya, Turkey to investigate spatial and seasonal variations, sources, air-soil exchange, and associated carcinogenic risks of polycyclic aromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs). The highest atmospheric and soil concentrations were observed near power plants and residential areas, and the wintertime concentrations were generally higher than ones measured in summer. Spatial distribution of measured ambient concentrations and results of the factor analysis showed that the major contributing PAH sources in Kutahya region were the coal combustion for power generation and residential heating (48.9%), and diesel and gasoline exhaust emissions (47.3%) while the major PCB sources were the coal (thermal power plants and residential heating) and wood combustion (residential heating) (45.4%), and evaporative emissions from previously used technical PCB mixtures (34.7%). Results of fugacity fraction calculations indicated that the soil and atmosphere were not in equilibrium for most of the PAHs (88.0% in winter, 87.4% in summer) and PCBs (76.8% in winter, 83.8% in summer). For PAHs, deposition to the soil was the dominant mechanism in winter while in summer volatilization was equally important. For PCBs, volatilization dominated in summer while deposition was higher in winter. Cancer risks associated with inhalation and accidental soil ingestion of soil were also estimated. Generally, the estimated carcinogenic risks were below the acceptable risk level of 10− 6. The percentage of the population exceeding the acceptable risk level ranged from < 1% to 16%, except, 32% of the inhalation risk levels due to PAH exposure in winter at urban/industrial sites were > 10− 6.