The use of complexes of algae polysaccharides and Ce4+ to degrade compounds containing peptides or phosphate ester bonds

Effective degradation of compounds containing peptides or phosphate ester bonds in environment is important. In this paper complexes of algae polysaccharides (APS) and Ce4+ were made, and catalysts of the complexes for degradation of compounds containing peptides or phosphate ester bonds were examined. The results show that the complexes could hydrolyze bovine serum albumin (BSA). The complex composed of laminaran and Ce4+ could not only significantly hydrolyze BSA but also rapidly convert the supercoil DNA (plasmid DNA form) into the linear form DNA (plasmid DNA form) in neutral pH solution. They could also promote the degradation of chlorpyrifos. The chlorpyrifos residual in neutral pH solution treated by the complex was 1.16 mg/l and the degradation rate was about 94.28% after 48 h, whereas without the complex treatment the residual 9.37 mg/l and the ration 53.82%. The chlorpyrifos residual in spinach from the treatment plot was only1.14 mg/kg on 10 days after spraying the complex, whereas the residual in spinach from the control plot was 3.10 mg/kg.