ABSTRACT
The following study evaluates the effect of different chemicals (amitrole, atrazine, carbofuran, diquat, linear alkylbenzene sulphonate (LAS), lindane, 4-nitrophenol, and penta-chlorophenate (PCP)) on the pH in aquatic outdoor microcosms. Before the application of the test chemicals, the outdoor microcosms were divided into three compartments. Each compartment contained sediment, macrophytes, phytoplankton, zooplankton, and destruents. The test chemical was applied to two of these compartments, while the third served as the control. The compartments treated with LAS and 4-nitrophenol, as well as those with the herbicides atrazine, diquat, and amitrole showed a pH decrease. The insecticides lindane, carbofuran and the ubiquitous pesticide PCP had no effect on the pH.
