The Impact of Pesticides - Academy Publish

Figure 3. DDTs in mussel samples for years 2002-2008Lindane and its isomersConcentration of hexachlor cyclohexanes (HCH) found in musel samples waspresented in Figure 4. ∑HCH ranging from 5.75 ng/g fresh weight sample (year2008) to 52.82 ng/g fresh weight sample (year 2007).This sum is going on accordinga descending linear function besides the HCHs values found during the years 2006and 2007. Technical HCH isn’t in use in our country but the present concentrationsare being influenced by past produce and a use of HCHs. Lindane was not the majorcontributor. Concentrations of other Lindane isomer were highest in musselsamples. These isomers and other compounds such as chlor-benzenes wereconsidered waste of Lindane fabric. These wastes were discharged directly to thesea. Degradation process, physical-chemical properties for HCH isomers build theirrelative contribute. Concentration of b- HCH was higher than the other isomers’because of its higher tendencies to accumulate in fatty tissue. It was noted that betaisomer is missing for samples of years 2003 and 2006. Alfa and delta isomers ofHCH were found almost for all analyzed samples. They come into in industrialprocess of Lindane produce. These isomers and other compound were separate fromtechnical Lindane and were treated as waste. This was the main factor for theirpresence in mussel samples for Porto-Romano station. The α/γ HCH ratio, anindicator of current technical HCH application, was lower. Again this likely reflectsrecent use of HCH formulations. Discharging of waste in working period forLindane chemical plant before 90’ and after that mismanagement of wasterepositories of ex-chemical plant were the main factors for found levels in thisstation. Found levels for Lindane and its isomers were in the same range with otherreports for Adriatic and Mediterrean Sea.AcademyPublish.org - The Impact of Pesticides232