Effects of iron on the degradation of triphenyltin by pyoverdins isolated from Pseudomonas chlororaphis

Abstract

The yellow compound pyoverdin was isolated from the bacteria Pseudomonas chlororaphis, isolated from mud in Japan. A study of the effects of iron, phosphorus, manganese and zinc on degradation of triphenyltin (TPT) by pyoverdin (20 mg) was carried out in distilled water (30 ml) containing 6 mg l À1 concentration of TPT at 20°C for 48 or 96 h. The organotins in water were analyzed by gas chromatograph±mass spectrometry in the selected ion mode. The degradation of TPT by pyoverdin decreased with increase of phosphorus at 0±35 mg l À1 and Fe-EDTA at 0±2 mg l À1 concentrations.Also, degradation of diphenyltin by pyoverdin decreased with increase of Mn-EDTA at 0±1 mg l À1and Zn-EDTA at 0±1 mg l À1. On the other hand, degradation of TPT by pyoverdin was found to be unaffected by manganese and zinc in water.

Degradation of dibutyltin in sea water by pyoverdins isolated from Pseudomonas chlororaphis

“…The properties of pyoverdins are consistent with their role as siderophores with a strong affinity for ferric iron. 9 Yamaoka et al 6 found that degradation of TPT by pyoverdins was inhibited by iron in water. In conclusion, the results suggest that DBT and TPT was reacted with the iron chelate site on pyoverdins.…”