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ŞENGÜL, BURCU

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ŞENGÜL

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    Effects of hydrogen peroxide and temperature on removal of polycyclic aromatic hydrocarbons (Pahs) from soil during photodegradation applications
    (Taylor, 2021-01-07) Sengül, Burcu; Eker Sanlı, Gizem; Sakin, Ahmet Egemen; ŞENGÜL, BURCU; EKER ŞANLI, GİZEM; SAKIN, AHMET EGEMEN; Mühendislik Fakültesi; Çevre Mühendisliği Bölümü; 0000-0003-0877-402X; 0000-0002-0513-0520; AAZ-1166-2020; AAH-3216-2021; AAH-3216-2021
    This study investigated the removal of polycyclic aromatic hydrocarbons (PAHs) from soils around a cement factory in Bursa-Turkey. UVA and UVA-H2O2 applications were carried out with the particular apparatus. The evaporated PAHs were collected with the polyurethane foam (PUF) column in this apparatus. UVA applications were carried out simultaneously at two temperatures (18 degrees C and 35 degrees C) to determine the effect of temperature on PAHs' removal. Evaporated PAH amounts and PAH removal efficiencies were calculated. In UVA applications (without using H2O2), n-ary sumation (12) PAH removal efficiency was calculated as 90%, and this value increased to 95% with the use of H2O2. The highest PAH removal ratio (95%) was obtained with UVA-H2O2 (1% H2O2) application. An increase in temperature did not contribute significantly to the removal of PAHs (except for 20% H2O2). During the experiments, the amount of evaporated PAHs from soil to air increased depending on the temperature. It was observed that 80% of evaporated PAHs were formed 3 ring compounds (Phe, Ant) at 35 degrees C. It was concluded that only low H2O2 dose (1%) was effective on the removal of PAHs from soils at 18 degrees C and 35 degrees C.
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    Performance evaluation of diethylamine to the removal of polycyclic aromatic hydrocarbons (PAHs) from polluted soils with sunlight
    (Taylor, 2021-02-07) Eker, Gizem; Şengül, Burcu; Cindoruk, Sabahattin Sıddık; EKER ŞANLI, GİZEM; ŞENGÜL, BURCU; CİNDORUK, SABAHATTİN SIDDIK; Mühendislik Fakültesi; Çevre Mühendisliği Bölümü; 0000-0003-0877-402X; 0000-0001-7536-0332; AAZ-1166-2020; CNL-8702-2022; JRB-1424-2023; GBB-7012-2022
    In the present study, the removal of polycyclic aromatic hydrocarbon (PAH) compounds from contaminated soil with solar radiation was investigated. In this context, the effect of diethylamine (DEA) as a photo-sensitizer on the photodegradation of PAH was examined, and the ring distributions of the PAHs were determined. DEA was added to samples at the doses of 1%, 10%, and 20% of dry weight of soil, and samples were kept in ambient air for 24 hours. Concentrations of sigma(12)PAH in soil samples were detected with Gas Chromatography-Mass Spectrophotometer (GC-MS) as 4382 ng/g dry matter (DM). The total PAH content of the soil decreased by 45% in the presence of sunlight without using DEA. sigma 12PAH removal efficiency was at the maximum level of 76% with the addition of 1% DEA to the soil. The increase in the dose of DEA adversely affected the PAH elimination process, and minimum removal ratio (32%) was obtained in the sample containing 20% DEA. The use of DEA has contributed to the elimination of most 3-ring PAH species. Heavy species, 5-6 ring compounds, have not been removed in the presence of sunlight.