地下水污染情况

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

染料厂所处区域位于冲洪积扇中下部地区,承压水含水层多以中细砂层、粉细砂层为主,含水层为多层结构,砾石含量少。第四系孔隙水主要为上更新统潜水、浅层微承压水(20~40m)、浅层承压水(40~80m)和中更新统中深层承压水(底板埋深一般<150m)。

              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

北京染料厂以生产分散染料、还原染料和有机颜料为主,有机颜料主要为酞菁系列颜料和染料。在生产过程中造成土壤污染的主要污染物包括持久性有机污染物PCBs、1,2,4-三氯苯和六氯苯,重金属镉和砷等。其中POPs类污染物主要存在于原染料生产车间区域。

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

斯德哥尔摩公约明确规定于2028年前完成含PCBs液体和被PCBs污染设备的环境无害化管理。为了尽快查明PCBs污染物,推进履约的进程,提高中PCBs管理和处置的水平,我国政府在全球环境基金的支持下,同世界银行合作开展“中国PCBs管理与处置示范项目”。该项目场地位于中国浙江省。

封存点的清运和处置工作由杭州大地环保有限公司负责实施,清运工作结束后,采用热脱附装置对污染土壤进行处置,PCBs电力设备及热脱附过程产生的高浓度残渣将运往沈阳做最终处置。

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

目前由于房产开发建设的原因,场地已被开挖重新改造,在发现的电容器埋藏点附近,用简易设施在封存电容器的土堆进行围护隔离。在土堆附近,可闻出略有电容器废油挥发出的气味。土堆东西长约25米,南北宽约16米,土堆高约5米。土堆的上部有部分新土覆盖,覆盖土堆高大约为2.4-3.0米。土堆两侧已开辟施工道路,两侧道路宽分别为3米和4.5米。由于封存点位于塔山山顶上,山顶相对山下路面地势较高,地下水不会对该封存点的施工造成影响。

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

不同的污染废物,需采用不同的清运过程,包括清理顺序、包装方法、包装容器及运输方式等。因此,有必要对该封存点的污染废物进行分类,根据分类结果计算各类废物的量,并决定所采用的包装方法、包装容器、容器数量及运输方式。根据中国PCBs废物的现状,按PCBs废物的存在形态并结合该封存点实际情况,将该封存点的废物分为以下几类:(1)PCBs污染土壤;(2)电容器及破损的电容器配件;(3)操作过程中的污染废物,包括吸附PCBs的物料(抹布、木屑等),个人防护设备(防护服、手套、一次性防护服等),包装(包装容器、防渗膜、防渗袋)等;(4)PCBs洗涤废液,黑区收集的雨水等。

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主要潜在修复技术介绍

3.1 Introduction of the main potential remediation technologies

 

3.2修复技术筛选矩阵介绍

3.2 Introduction of the remediation technology screening matrix

 

3.3修复技术筛选结果

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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