Mycoremediation of chlorpyrifos and lambda-cyhalothrin by two species of filamentous fungi |
| |
| Authors: | Marwa T A Abdel-Wareth Rania M Abd El-Hamid |
| |
| Affiliation: | 1. Environmental Research and Medical Malacology Department, Theodor Bilharz Research Institute, Giza, Egypt;2. Central Agricultural Pesticides Laboratory, Agricultural Research Centre, Nadi El-Seed street no 7, Dokki, Giza, Egypt |
| |
| Abstract: | Chlorpyrifos and lambda-cyhalothrin are two of the most commonly used insecticides in agriculture. Their residues reach water courses, affecting aquatic fauna and subsequently human beings. Aspergillus viridinutans and Penicillium implicatum isolated from water drains at El-Giza and El-Ismailia governorates were grown in potato dextrose broth media supplemented with different concentrations of chlorpyrifos and lambda-cyhalothrin. Samples, taken at 0, 7 and 14 days, were analysed for pesticide residues by gas chromatography. The fungal species showed biodegradation potentials of 2.5, 5 and 20 ppm of chlorpyrifos and lambda-cyhalothrin. Degradation percentage reached 100% after 14 days of incubation of both pesticides (2.5 ppm) individually with the two tested fungal species. The values of degradation rate, besides the weights of dry fungal biomasses ensured that the optimum chlorpyrifosconcentration for A. viridinutans and P. implicatum was 5 ppm, while the optimum lambda-cyhalothrin concentration for A. viridinutanswas 5 ppm and 2.5 ppm for P. implicatum. |
| |
| Keywords: | Chlorpyrifos Lambda-cyhalothrin Aspergillus viridinutans Penicillium implicatum Degradation rate |
|
|
