Fate of chemicals in plant-soil systems: Comparison of laboratory test data with results of open air long-term experiments

Atsdr Evaluation of Health Effects of Chemicals

“…Less than 10% of the applied chlordecone was degraded in the soil or converted by the barley plants, and there was no volatilization of the compound from the soil to the air (Kloskowski et al, 1981). A laboratory soil-plant system showed that degradation of chlordecone, as determined by soil residues remaining after volatilization and mineralization, was 1-3% after one week; this compared favorably with the residues remaining in soil in the field after one growing season (Scheunert et al, 1983). Analysis of soil contaminated with chlordecone collected in the vicinity of the chlordecone production facility showed some photolytic degradation of the compound with the production of small amounts of monohydro isomers of chlordecone (Borsetti and Roach, 1978).…”

Enhanced degradation of pesticide wastes in soil: implications for bioremediation of agrochemical dealer sites

“…For example, large quantities of CO2 liberated by the rhizosphere occupants form carbonic acid which causes a solubilization of insoluble, inorganic nutrients, that would not be readily available to the plant. This process effectively increases the supply of assimilable inorganic nutrients such as phcsphcrus, potassium, magnesium, and calcium, and thus improves crop nutrition /AlAvonHAr 1Q'77\ (Ebing and Schuphan, 1979;Kloskowski et al, 1981;Scheunert et al, 1983;Bellin and O'Connor, 1990;Malik and Drennan, 1990;Lee et al, 1991;Nair et al, 1993;Shimp et al, 1993). Enhanced degradation of nonagricultural chemicals has been noted to occur in vegetated soils (Rasolomanana and Balandreau, 1987;Federle and Schwab, 1989;Aprill and Sims, 1990).…”