Comment: Underground sewage: a deadly threat loomed, 3
Comment: Underground sewage: a deadly threat loomed
, 3
Seepage wells, seepage pits diverse waste-water treatment, high pressure unscrupulous row
According to Comment to report, the northern areas, often through some bad business seepage pits, seepage wells, seepage pools for waste-water treatment. Public and Environmental Research Center, Ma Jun, director told reporters: "As serious overexploitation of groundwater, the formation of a number of groundwater in northern China funnel, easy infiltration of surface water for seepage pits, seepage wells discharge an opportunity to capitalize."
Public information, only in Hebei Province, currently has 20 groundwater funnel zone, an area of more than 40,000 square kilometers. Many other provinces also face the same situation. Water research vice president of Beijing Normal University, Jin-Sheng Wang pointed out that the underground sewage in these areas, not only pollute the shallow groundwater, deep groundwater is also very easily influenced, more dangerous.
The South through the cave of some polluting enterprises discharge industrial effluent to groundwater contamination cave because caves interconnected between the more often will lead to groundwater pollution into the film occurs.
Comment's survey found that, in addition to digging seepage pits, seepage wells outside the waste-water treatment, in order to avoid investigation, and some actually polluting a lot of high pressure pump sewage directly into the ground. Experts said that this bad behavior is far more than the danger of groundwater seepage, is simply unconscionable.
Wastewater, sewage transferred to the ground can not be ignored, solid contaminants illegal landfill on the groundwater hazards to be overlooked. Somewhere in the central province's interview was informed that a local environmental protection department of the chemical enterprise. The company will contain toxic elements arsenic (oxidation commonly known as "arsenic") of the solid waste landfill illegal underground, heavily polluted groundwater to local health and safety of people pose a significant threat. It is understood, caused by heavy metals in water and soil pollution have on our environment, food security, population health and sustainable development of agriculture causing serious harm.
Comment: black hand cut off transfer of contamination to the groundwater
Comment's lofty to Stella Y. Gao Xiu-Zhen ZHANG Honghe
Unlike surface water, groundwater, has been called the human "life water." Once contaminated, horrific consequences. East China's authorities have launched investigation and assessment of groundwater pollution typical area pilot project, the findings alarming?? Universal detection of trace organic pollutants, carcinogenic, cause distortion, caused by mutations cause of "three" substances were detected in varying degrees, groundwater pollution was a regional trend. And Beijing, Tianjin, Hebei and other places has yielded more than 100 kinds of water pollutants, many of which are carcinogenic, mutagenic substances cause distortion and. Experts pointed out that Shexian Hebei, Henan Shen Qiu county, Tianjin Beichen District, Shaanxi Hua county, Guangdong frequent Wengyuan County in the "cancer villages", are highly correlated with water pollution.
From now, almost no control of groundwater pollution potential, because the high cost of groundwater pollution control unbearable. Wealthy Japanese as early as in the last century on the status of their assessment of groundwater pollution, and concluded that: control of contaminated groundwater would cost 800 trillion U.S. dollars! Japan can only sighed with regret.
In addition to monetary costs, there is a time cost. Buried in the ground water within a certain depth, oxygen, low temperature, no light, the flow rate and water alternating cycle is long, once contaminated, contaminants, water and interaction between media complex. Even if the economy can afford pollution control costs, eliminate sources of pollution also need to 10 years, decades or even centuries.
The groundwater pollution in China is expanding, showing the evolution from point to area, from east to west extension, spreading from cities to rural areas, from local to regional spread of the trend; pollutant constituents from inorganic to organic growth, increasing levels of harm; expanding area of groundwater pollution, pollution is increasing.
Save the human "life water" into place in the environmental sector as a major issue before. How to cut off the transfer of pollution to the underground black hand, as soon as possible to curb this dangerous trend? Comment reporter interviewed several experts.
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