Applications of chitosan beads and porous crab shell powder for the removal of 17 organochlorine pesticides (OCPs) in water solution

A new method for the treatment and elimination of 17 organochlorine pesticides (OCPs) in water solution using porous crab shell and chitosan beads as adsorbents is described. The OCPs have been used worldwide as an agricultural insecticide, and shown to contaminate in both biological and environmental samples. In this report, we investigate the use of crab shell and chitosan powder for the reduction of water-soluble organochlorine pesticides present in water. Removal of OCPs was studied by means of solid-phase microextraction (SPME) method. Two commercially available SPME fibers, 100 μm PDMS and 65 μm PDMS/DVB, were compared in the SPME extraction of OCPs, where the 65 μm PDMS/DVB exhibited better performance. The experimental results indicate that chitosan beads and crab shell powder can both effectively remove the 17 OCPs from water solution with sum of their concentrations ranging from 2.0 to 2.8 ng mL−1.