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Huanchuang (Xiamen) Technology Co.,Ltd
Phone: ：+86 592 5029670
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| Lanzhou water pollution treatment of the latest developments: emergency measures to lift the three D |
| Edited：HuanChuang technology Date：2014-4-14 13:28:41 |
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Lanzhou water benzene exceed the standard event has in the past three days, on the causes of this event can be said to be striking one snag after another. The first is that the local environmental protection department of petrochemical sector a pipeline leak is the incident "arch-criminal", experts and then participated in the survey also said yesterday, the pollution from "historical events".
determination of the cause of underground sewage caused by benzene exceed the standard
Yesterday, Beijing Normal University Professor, Research Institute of water sciences, national environmental emergency experts group members Wang Jinsheng said in Lanzhou, preliminary judgment, Lanzhou tap water in the benzene from Lanzhou Petrochemical 80's of last century occurred pollutants into the underground leakage accident.
Wang Jinsheng said, Lanzhou tap water from the the Yellow River River, Lanzhou Veolia Water (Group) Co. Ltd. the first water to second water has an approximately self ditch 3 kilometers, and the Yellow River are all from the west to the East, the south is Lanzhou Petrochemical flow channel. The access to information is found, the enterprises in the 80's of last century, there had been some accident, some organic material with the groundwater seepage into the ground, from high to low motion. And gravity flow channel depth of four or five meters, and in the water downstream, blocking the movement of ground water, flowing groove side forms the groundwater Residence District, preliminary judgement is the retention area containing benzene water into the flow channel.
Why only now benzene pollution? Wang Jinsheng explained, gravity flow channel is the cement structure, every once in a while there is a contraction joint, after design life self ditch to (self channel for completion has been in operation for nearly 60 years), contraction joint aging, retention area of benzene in the groundwater by the contraction joints into the flow channel, and the pollution to the water quality.
Wang Jinsheng said, now in the gravity near the ditch is about one meter found deep underground sewage waste oil, but its composition need further testing.
A day earlier, the Lanzhou municipal environmental protection departments that Lanzhou Petrochemical a pipeline leak, pollute the self channel number 4 line, leading to the benzene exceed the standard.
Three latest progress to lift the emergency measures of
Yesterday, Lanzhou "4 · 11" local water benzene indexes exceed the standard emergency disposal of the leading group accident investigation group deputy head Zheng Zhiqiang said, the investigation group the next step will be to cause local water benzene exceed the standard event relevant responsible units and persons responsible for further survey evidence.
In addition, because the Chengguan District and Qilihe District of Lanzhou city has not been detected in benzene, water quality remained stable, 12 on the evening of 6 two district has lifted the emergency measures. The Anning District Water benzene index range due to the continued stability, comply with the relevant national standards (benzene content of not more than 10 micrograms per liter). From 5 pm yesterday, has been the district lifted emergency measures, emergency pull transport water and bottled water, bottled water free. |
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