Abstract
The corridor region between Beijing and Tianjin in China belongs to the alluvial and proluvial sedimentary plains of different water systems, and the social economy is very developed. By personally interviewing local villagers, the author obtained data on cancer morbidity and mortality at the village level. Using GIS operating platform, the author makes contour map, its value ranges from 10/10,000 to 100/10,000 and has significant zonal distribution characteristics. The authors analyzed the relationship between cancer distribution and natural geography, soil and hydrogeochemical data in the region, the results showed that there was a significant negative correlation (n=222, γ0.05=0.163): shallow water level buried depth -0.4218, surface soil pH-0.3702, altitude elevation -0.3448, surface soil SiO2-0.3158, significant positive correlation: surface soil Pb0.5769, Cd0.4629,deep soil (-1.3m) N0.5518, Hg0.4321, surface soil Mo0.3486, Cu0.3340, As0.3234, Fe2O30.2913, Mn0.2906,U0.2882, F0.2833, shallow groundwater NH4-N0.2768, surface soil V0.2835, Ni0.2707, F0.2604, Cr0.2460, Tl0.2241, shallow groundwater As0.2199,Cd0.2109, NO30.1644. According to the characteristic pollutant frequency table of 340 key industries in Langfang area, the correlation coefficient of organic pollutants and mercury was calculated: benzopyrene 0.4723, pyridine 0.1551, formaldehyde 0.1371, dioxin 0.1138.Based on the results of this study, the authors established a mode chart of the relationship between geochemical anomalies (contamination sources) of soil waters- geotechnical hydrological conditions (migration pathways)-resident cancer distribution (sensitive receptors).
Highlights
The corridor region between Beijing and Tianjin in China belongs to the alluvial and proluvial sedimentary plains of different water systems, and the social economy is very developed
There is a positive correlation between the number of cancer villages in each province and the total GDP of each province [5]
Based on the latest water soil geochemical survey and resident cancer incidence mortality data, using relevant analytical methods, this paper has studied the geological environment factors of cancer distribution in the Beijing-Tianjin Corridor region
Summary
Environmental pollution has caused public grievances and even evolved into sensitive political issues. The discharge of major pollutants exceeds the environmental carrying capacity, Water, atmosphere, soil and other pollution are becoming more and more serious. Automobile exhaust, persistent organic matter and other pollution continue to increase, The rivers flowing through the city are generally polluted. According to the statistics of China Environmental Statistics Annual Report (2004): Since 1998, with the improvement of industrial development and urbanization, China's domestic sewage and industrial wastewater discharge has been continuously increasing. Li Zhongchun pointed out that China's fertilizer utilization rate is not high, Nutrients that are not used by plants enter the environment through fixation, leaching and volatilization, causing soil plate harden and acidification, heavy metals such as copper, mercury and cadmium exceed the standard, atmospheric and water pollution [16]. The results show:1)Since 1980, the application rate of chemical fertilizers in China has increased rapidly, and the average growth rate of chemical fertilizer application intensity has been increasing every year 4.1%. 2)Beijing and Tianjin are ultra-high-strength fertilization areas;3)Environmental safety thresholds for chemical fertilizer application in more than 60% of provinces vary in the middle range; 4)In 2014, the application intensity of chemical fertilizers in China was 1.2 times the environmental safety threshold; Excessive application of nitrogen and phosphate fertilizers is more serious, and insufficient application of potassium fertilizer is more common [17]
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