An attempt was made to determine the residual distribution of organochlorine and organophosphorus pesticides in the various kinds of Korean tea which were purchased from the market. The organochlorine pesticides investigated in this study were BHC, DDT and dicofol and the organophosphorus pesticides were diazinon, EPN, fenitrothion and parathion. The pesticide residues were determined by GC-ECD and NPD. Only BHC was detected in all the samples and it's level were ranged from 0.00064 ppm to 0.05995 ppm and it's average was 0.00682 ppm and DDT, dicofol and organophosphorus pesticides were not detected in all samples. The organophophorus pesticides were detected(0.0035-0.0983 ppm) in raw materials but were not in the manufactured material and it is considered that the largely components of the pesticides is removed by drying and high temperature while the tea was manufactured. The recovery tests of the pesticides gave satisfactory results showing an average yield of 97.6% with organochlorine pesticides and 92.5% with organophosphorus pesticides and the detection limits level were 0.00008 ppm to 0.0010 ppm.

As a result of analyzing the contents of organic chlorine pesticide-containing wastes, HCB 421.8 ng/g, Endosolfan- 2 73.044 ng/g, PeCB 53.972 ng/g, Endosolphan-1 43.649 ng/g respectively. In the case of liquid pesticides, the HCB concentration was the highest at 167.489 ng/g, similar to that of the solid phase, followed by PeCB at 23.462 ng/g. As a result of decomposition experiments on total OCPs among the pesticide liquid and solid phase components, initial concentrations were 597.384 ng/L for liquid pesticides and 198.176 ng/L for solid pesticides. However, the final effluent gas after decomposition showed a decomposition rate of more than 99.99% at a minimum of 0.005 ng/L and a maximum of 0.055 ng/L. Degradation test results for 25 species of OCPs such as PeCB, HCB, and Endosolfan for pesticide solid phase and liquid phase at reaction temperatures of 850℃ and 1,100℃. Of the 25 OCPs in the exhaust gas, trace amounts of PeCB and HCB were detected in the range of 0.006 to 1.025 ng/L at 1,100 ℃ and 850 ℃, and 23 OCPs were not detected. In the case of pesticides, the method of high temperature incineration and high temperature melting is proposed as the designated waste, but detailed methods of treatment conditions such as incineration conditions are not presented. Organochlorine pesticides were decomposed smoothly at 850 ℃ as well as incineration temperature of 1,100 ℃. However, since the dioxin concentration in exhaust gas exceeds 850 ℃, it is safe to operate at more than 1,100 ℃ in order to prevent the possibility of dioxin in advance.

The Stockholm Convention is an agreement to reduce POPs use, production and emissions. POPs are highly toxic substances and can not be decomposed in their natural state. It has the characteristic of long distance movement. In this study, we calculated the theoretical air volume based on the result of element analysis. Considering that the inside of the reactor is small, more than 10 times of the air ratio was injected. Also, the retention time was set to 4 seconds or longer by giving a margin. The incineration temperature was 850℃ and 1,100℃ degrees. As a result of thermogravimetric method analysis, the weight of chlorine-based flame retardant-containing wastes was 300∼600℃, and that of organic chlorine-based pesticides was 200∼400℃. On the basis of this, it was experimentally investigated whether the environmentally stable incineration is achieved when the sample is thermally treated using lab-scale, 1 kg/hr. As a result of analyzing five kinds of exhaust gas, the concentration of O2 was high, but the amount of CO was decreased. It is considered that complete combustion is difficult because of the small size of the furnace due to the nature of lab-scale. The chlorinated flame retardants had a decomposition rate of 100 % and the average organochlorine pesticides were 99.9935%. Considering the decomposition rates of chlorinated flame retardants and organochlorine containing pesticide derived wastes derived from this study, incineration treatment at over 2 tons/hour, which is a conventional incinerator, is considered to be possible. Considering the occurrence of dioxins and unintentional persistent organic pollutants, it is considered possible to operate at more than 1,100℃.

본 실험은 1998년 1월부터 2001년 12월가지 4년간 경기도와 인천지역에 납품된 군납 농산물 17종(배추, 무, 오이, 감자, 사과, 양파, 파, 양배추, 고추, 당근, 상추, 호박, 마늘, 미나리, 시금치, 쑥갓, 부추)을 대상으로 유기염소계 농약 10종 (BHC, captafol, captan, chlorobenzilate, chlorothalonil, DDT, dicofol, endosulfan, folpet, tetradifon)을