发布时间:2011-09-08 22:08:43

Figure 3 Location of the contaminated site

2.2.2 场地环境及水文地质情况

2.2.2 Environment and hydrology of the site


              The dye plant lies at the middle and lower parts of an alluvial-proluvial fan. The artesian aquifer comprises mostly medium fine sand layer and fine silt layer, multi-layer structured an containing little gravel. The quaternary system pore water is mainly the upper pleistocene phreatic water, shallow slightly confined water (20 - 40m), shallow confined water (40 -80m) and the middle pleistocene confined water of intermediate focal depth (The depth of the buried floor is generally less than 150m).

2.2.3 场地主要污染物


2.2.3 Main pollutants in the site

   This Beijing dye plant mainly produce disperse dye, vat dye and organic and organic pigment and the organic pigments are mainly dyes and pigments of phthalocyanine series. The main pollutants that cause pollution to the soil in the process of production include the enduring organic pollutants PCBs, trichlorobenzene, HCB, cadimium and arsenium. Of all these pollutants, the POPs pollutants mainly exist in the former dye workshops.





2.3 某多氯联苯(PCBs)污染场地

2.3 Site polluted by PCBs

2.3.1 场地简介

2.3.1 Brief introduction of the site



The Stockholm Convention states clearly that management of the environmentally harmless disposal of the equipment containing or polluted by PCBs liquids shall be finished by 2028. In order to find out the PCBs pollutants, promote the progress of the covenant and enhance the management and disposal level of the high and intermediate PCBs, supported by the global environmental fund, China is working with the World Bank on the "China PCBs Management and Disposal Demonstration Project". The project site is in Zhejiang Province, China. In September 2007, due to the need of developing the local economy, the site was developed by a estate developer of Zhejiang Province. And in the construction process, the burial place of this capacitor was discovered.

Clearing, transport and disposal at the sealing place was put in the charge of Hangzhou Da Di Environmental Protection Co., Ltd. On the completion of the clearing and transport, the thermal desorption device was used to dispose of the polluted soil and the PCBs electric equipment and high-density slags produced in the process of thermal desorption will be transported to Shenyang for final treatment.




Figure 4 Location of PCBs contaminated site

2.3.2 场地环境及水文地质情况

2.3.2 Environment and hydrology of the site


Owing to the development of real estate, the site has been dug for reconstruction. Around the spot where the capacitor was found, simple means have been used to surround and keep off the earth heap where the capacitor is sealed. Near the earth heap, people can smell faintly the odour from the waste oil of the capacitor. The heap is some 25 meters from east to west and 16 meter wide from north to south and some 5 meters high. The top of the heap is partly covered with new soil about 2.4-3.0 meters. On either side of the heap is construction road, 3 meters and 4.5 meters wide respectively. Because the sealing place is on the top of Tashan Mountain, far above the road at the foot of the mountain, the underground water will not affect the construction on the sealing point.

2.3.3 场地主要污染物

2.3.3 Main pollutants in the site


Different pollutant wastes require different clearing processes, including the clearing order, packing method, packing container and transport means and etc. Therefore, it is necessary to classify the pollutants at this sealing point, calculate the amounts of various wastes according to the classification results and to determine the packing method, packing container, number of the containers and transport means. According to China's current PCBs situation and in light of the existing states of the PCBs wastes and the circumstances of the sealing point, the wastes at the sealing point fall within the following classes: 1. PCBs polluted soil; 2. The capacitor and the damaged components of the capacitor; 3. Pollutant wastes produced in the operation process, including materials (cleaning rags, wood chips and etc) that absorbed PCBs, personal protective devices (protective clothes, gloves, one-off protective clothes and etc ), package (packing container, impervious membrane and impervious bags ) and etc; 4. The PCBs washing and rain water collected in the black areas.

3. 场地修复技术筛选

3. Site remediation technology screening


3.1 Introduction of the main potential remediation technologies



3.2 Introduction of the remediation technology screening matrix



3.3 Remediation technology screening result


4. 案例场地修复方案及修复实施

5.  Remediation plan and implementation on the case sites

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