粤港澳大湾区某三旧改造地块土壤和地下水污染状况初步调查研究

Soil and Groundwater of a Three Old Renovation Plot in the Guangdong Hong Kong Macao Greater Bay Area Preliminary Investigation and Study on Pollution Situation

粤港澳大湾区某三旧改造地块,二十世纪80至90年代存在工业生产活动,工业企业拆除后用作道路、办公、绿化公园和停车场,并且在建设过程中存在大量回填土,回填土的来源不明,地块未来利用规划为二类居住用地。为了确保地块未来能够进行安全开发利用,相关部门对该地块进行了土壤和地下水的初步调查研究。第一阶段的调查结果显示,由于地块存在工业生产活动,需进行第二阶段现场采样分析。采用判断布点和网格布点相结合的方法,在地块内共布设了57个土壤监测点位、6个地下水监测点位和1个对照监测点位。调查结果显示:该地块地下水存在砷污染,土壤存在重金属砷、铅、镍和有机污染物苯并(b)荧蒽、苯并(a)芘、二苯并(ah)蒽污染,所以需要开展土壤污染状况异常点位排查和详细调查。

A certain three old renovation plot in the Greater Bay Area of Guangdong,Hong Kong,and Macao had industrial production from the 1980s to the 1990s.After the demolition of industrial enterprises,it was used for roads,offices,green parks,and parking lots.During the construction process,there was a large amount of backfill soil,and the source of the backfill soil is unknown.The future use plan of the plot is for Class II residential land.To ensure the safe development and utilization of the plot in the future,preliminary soil and groundwater investigations were conducted on the plot.The survey results of the first stage show that there are industrial production activities on the plot,and the second stage on-site sampling analysis is required.Using a combination of judgment and grid layout methods,a total of 57 soil monitoring points,6 groundwater monitoring points,and 1 control monitoring point were set up within the plot.The survey results show that there is arsenic pollution in the groundwater of the plot,and heavy metals such as arsenic,lead,nickel,and organic pollutants such as benzo(b)fluoranthene,benzo(a)pyrene,and dibenzo(ah)anthracene are present in the soil.It is necessary to conduct a detailed investigation and investigation of abnormal soil pollution points.