Evaluation Of Soil Organic Pollution And Pollution Control In A Petrochemical Plant

In this paper, the contaminated soil in a petrochemical plant was selected to researeh. According to the soil monitoring data, the relationship between organic pollutants content and depth was determined using SPSS, and evaluation of soil pollution used Single-factor pollution index method, Nemerow integrated pollution index and health risk assessment. Through research and evaluation, the following conclusions:(1) A variety of organic pollutants have been caused soil pollution, the upper pollution is serious, particularly benzene pollution, pollution levels decreased along with the depth of the soil, the soil is not contaminated to 2.0m deep.(2) There exists a relationship between soil contaminants and soil depth, and different pollutants have different function curves. Chlorotoluene and 2,4-dimethylphenol is a logarithmic relationship; benzene is an exponential relationship; chlorobenzene and nitrobenzene is an inverse relationship; toluene and aniline is a linear relationship; 2-nitrophenol is a cubic relationship; 2-chlorophenol and naphthalene is a quadratic relationship.(3) Health risk assessment results show that there are some risk of non-carcinogenic and carcinogenic in the site, and the exposure route of non-carcinogenic and carcinogenic risk rankings were:inhalation of air> oral exposure> dermal contacting polluted soil> inhalation of dust. Substances played a major role are benzene, nitrobenzene and aniline.(4) Comparing the two sets of management program of incineration and landfill, the results show that the landfill does not require the composition of the soil, and it is low investment and treatment cost. So, the article recommend landfill to control soil.