Potable Water in S. China City Qualified After Purification of Polluted River
Posted on: Wednesday, 28 December 2005, 09:00 CST
Potable water in S. China city qualified after purification of polluted river
GUANGZHOU, Dec. 27 (Xinhua) -- An examination has shown that the water quality at a water plant in Yingde, a city in southern Guangdong Province, is almost back to normal after purification of the polluted Beijiang River.
Tests show the cadmium density in the water at the city's Nanhua Waterworks is 0.0022 mg/L, lower than the national standard of 0.005mg/L, the provincial health department said on Tuesday.
The department, however, warned that the cadmium density at the city's Baishiyao Reservoir remains above the standard. The city had stopped procuring water from the reservoir after the pollution incident.
Guangdong began on last Friday to purify the polluted river, hoping to dilute the excessive cadmium.
The project was launched in the river section in Yingde City under the supervision of local experts, by adding iron or aluminium polymer at the upper reaches of the river to induce cadmium sedimentation.
The toxic stretch, resultant from excessive cadmium discharges from a smelting works in Shaoguan City on Dec. 15, has polluted the Beijiang River, a major drinking water source in the northern part of Guangdong.
The measure is the most economical and reasonable choice to deal with the cadmium pollution, said experts, adding that 1,200 tons of such component can reduce the toxic density by 30 percent.
The move is expected to ensure safe water quality at the lower reaches of the river, said experts.
The provincial environmental protection department issued a notice on Tuesday ordering all the factories to stop discharging cadmium waste.
Cadmium is a soft, bluish-white metallic element occurring primarily in zinc, copper and lead ores, which is easily cut with a knife and is used in low-friction, fatigue-resistant alloys, solders, dental amalgams, nickel-cadmium storage batteries, nuclear reactor shields, and rustproof electroplating. It can cause liver and kidney damage and lead to bone diseases when ingested.
Source: Xinhua News Agency - CEIS
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