Related water-accelerated transformations

Most of the ways in which natural water/solid interfaces influence the rates of transformation of pesticide compounds, however, are consistent with the various effects of related chemical species on these reactions in homogeneous solution, discussed in preceding sections. Russell et al. (1968), for example, observed that the hydrolysis of atrazine at low pH was greatly accelerated in suspensions of montmorillonite clay, relative to the rate ofreaction in homogeneous solution at the same pH. The authors attributed this effect to the acid-catalysis of the reaction by the clay surface, which exhibited a pH that was considerably lower (by as much as 3-4 pH units) than that of the bulk solution. As noted previously, the sorption of pesticide... 

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