Linear and cyclic volatile methylsiloxanes (VMS) are Si and O containing organic compounds that are increasingly subject to scientific studies in recent years. They are used as solvents and coating materials in personal care products, cleaning materials and industrial applications. In this study, it was aimed to investigate the spatial variations of VMS levels in river water and ambient air in Kucuk Menderes Basin and their air-water exchange patterns. Grab river water samples and passive ambient air samples collected from 10 sites throughout Kucuk Menderes Basin located in Izmir region in Turkey, and they were analyzed for VMS. The concentrations of ΣVMS in river water and ambient air ranged from 48.4 to 148 ng L⁻¹ and from 41.7 to 433 ng m⁻³, respectively. Among the VMS compounds, the predominant compounds were found to be D5 and D3 in ambient air and river water, respectively. In general, concentrations of all VMS congeners increased towards downstream of the river for both water and ambient air samples and there were substantial fluctuations between the sampling points. These fluctuations may be due to wastewater discharges at some sites (increase), followed by loss by volatilization along the river (decrease). VMS concentrations measured in air and river water samples were used to estimate the net air-water exchange fluxes. In all cases, fluxes were negative, ranging between −159 (L4) and −11100 (D3) ng m⁻² day, indicating volatilization from water is a source for atmospheric VMS.

线性和环状挥发性甲基硅氧烷（VMS）是含Si和O的有机化合物，近年来越来越受到科学研究的关注。它们在个人护理产品，清洁材料和工业应用中用作溶剂和涂料。在这项研究中，旨在调查库丘克·曼德斯盆地河流水和环境空气中VMS水平的空间变化及其气水交换模式。从位于土耳其伊兹密尔地区的库科克·曼德斯盆地的10个地点采集到的河水样品和被动环境空气样品进行了VMS分析。河流水和环境空气中ΣVMS的浓度范围为48.4至148 ng L ^-1和41.7至433 ng m ^{- 3}， 分别。在VMS化合物中，主要化合物分别是环境空气和河水中的D5和D3。通常，对于水和环境空气样品，所有VMS同系物的浓度都向河流下游增加，并且采样点之间存在很大的波动。这些波动可能是由于某些地点的废水排放（增加），然后是河水挥发造成的损失（减少）。空气和河水样品中测得的VMS浓度用于估算净空气-水交换通量。在所有情况下，通量均为负值，介于-159（L4）和-11100（D3）ng m ^{- 2}天之间，表明从水中挥发是大气VMS的来源。