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1991年7月,漯河市某村居民反映有的手压式抽水井(取水深度3～5m)水质近二个月来颜色发绿、有咸味、水垢大,已不能饮用。经现场调查,发现水井西侧30m处有一电镀厂废水排放口,日排放电镀废水0.5吨。 我们对电镀废水进行采样检验。经测定废水呈黄色,浊度75度,氯化物556.8mg/L,硫酸盐200mg/L,铬(六价)7mg/L,铁0.1mg/L,铜未检出。并对污染区距废水排放口30、50、70、80、100m的压水井进行了水质感观和理化项目的检验分析。在距废水排放口30m处水质为黄绿色,味咸,氯化物406.9mg/L,超标0.63倍,
In July 1991, some village residents in Luohe City, hand-pressure pumping wells (water depth of 3 ~ 5m) water quality nearly two months to the color of green, salty, large scale, has been unable to drink. After field investigation, it was found that there was a discharge outlet of electroplating factory at 30m west of the well, and the discharge of electroplating wastewater was 0.5 ton per day. We sample the plating wastewater inspection. The measured wastewater was yellow, turbidity 75 degrees, chloride 556.8mg / L, sulfate 200mg / L, chromium (hexavalent) 7mg / L, iron 0.1mg / L, copper was not detected. The water quality of the pressure water wells in the contaminated area 30, 70, 70, 80 and 100 m away from the waste water discharge port was checked and analyzed. At a distance of 30m from the wastewater discharge port, the water quality is yellow-green, salty, chloride 406.9mg / L, exceeding the standard by 0.63 times,