Biological activity and toxicitiy of imported and synthetic metal working fluids on &lt;i&gt;Scendesmus obliquus&lt;/i&gt; algae

Shimy, A El; Tantwy, N; Tabei, A; Omar, Asmaa M

doi:10.4314/ejbiot.v25i1.40278

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“…The ability of surfactants to reduce surface tension, leads to other pollutants accumulating on the surface of the water and eventually dissolving, thus entering the water bodies (Warne and Schifko 1999). Surfactants released are also likely to negatively impact flora and fauna as reported by Pavlić et al (2005) andEl Shimy et al (2007). Generally, however, surfactants have been observed to denature bind proteins from the cell walls of plants and consequently alter membrane permeability, hence, affecting aquatic food chains (Kimerle 1989;Lewis and Hamm 1986;Dyer et al 1997).…”

Section: Introductionmentioning

confidence: 99%

Composition and distribution of surfactants around Lake Chini, Malaysia

Latif

Wanfi

Hanif

et al. 2011

Environ Monit Assess

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This study aims to determine the composition of surfactants in the lake surface microlayer, rainwater, and atmospheric aerosols in the area surrounding Lake Chini, Pahang. Surfactants in the lake surface microlayer were taken from seven different stations around the lake, while samples of rainwater were taken from five different sampling stations. The samples of atmospheric aerosols were collected from the Lake Chini Research Centre which is in close proximity to the lake. The colorimetric analysis method was used to determine the composition and concentration of anionic surfactants as methylene blue active substances (MBAS) and cationic surfactants as disulphine blue active substances (DBAS). The concentration of anionic surfactants, as MBAS, in the surface microlayer ranged between 0.08 to 0.23 μmol L(-1), while the range of concentration of cationic surfactants as DBAS ranged from 0.09 to 0.11 μmol L(-1). The concentration of MBAS was higher in rainwater when compared to surfactants in the lake surface microlayer. The high concentration of surfactants in the fine mode of atmospheric aerosols suggests that natural and anthropogenic sources of surfactants contribute to the atmospheric surfactants.

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