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Title: Determination of Henry's law constants of organochlorine pesticides in deionized and saline water as a function of temperature
Authors: Çetin, Banu
Özer, Serdar
Sofuoğlu, Aysun
Odabaşı, Mustafa
Keywords: Pesticides
Gas-stripping technique
Henry's law constant
Organochlorine pesticides
Salting-out effect
Issue Date: Aug-2006
Publisher: Elsevier Ltd.
Source: Çetin, B., Özer, S., Sofuoğlu, A., and Odabaşı, M. (2006). Determination of Henry's law constants of organochlorine pesticides in deionized and saline water as a function of temperature. Atmospheric Environment, 40(24), 4538-4546. doi:10.1016/j.atmosenv.2006.04.009
Abstract: The Henry's law constant (H) is an important parameter that is required to estimate the air-water exchange of semi-volatile organic compounds. Henry's law constants for 17 banned/restricted/currently used organochlorine pesticides (OCPs) were experimentally determined using a gas-stripping technique in deionized and saline water (3%) over a temperature range of 5-35 °C. H values (at 25 °C) ranged between 0.066±0.037 Pa m3 mol-1 (endosulfan II) and 62.0±24.2 Pa m3 mol-1 (heptachlor) in deionized water while the range in saline water was 0.28±0.03 Pa m3 mol-1 (γ-HCH) and 135.2±31.3 Pa m3 mol-1 (heptachlor). The increase in dimensionless Henry's law constants (H′) for OCPs over the studied temperature range was between 3 (γ-HCH)-19 times (chlorpyrifos) and 3 (endosulfan II)-80 times (trans-nonachlor) in deionized and saline water, respectively. The calculated enthalpies of phase change (ΔHH) were within the ranges previously reported for OCPs and other organic compounds (23.8-100.2 kJ mol-1). The salting-out constant, ks, ranged between 0.04 (γ-HCH) and 1.80 L mol-1 (endosulfan II) indicating the importance of assessing the H values of OCPs in saline water to accurately determine their partitioning and fate in seawater.
ISSN: 1352-2310
Appears in Collections:Chemical Engineering / Kimya Mühendisliği
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
Sürdürülebilir Yeşil Kampüs Koleksiyonu / Sustainable Green Campus Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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