(On October 5, 1987, the National Environmental Protection Agency issued the implementation on February 1, 1982)
1.1 agricultural pulverized coal ash maximum allowable volume should meet the following requirements contaminants.
Standard value of pollutant control in agricultural fly ash mg/kg dry fly ash
project | Maximum allowable content | ||
On acidic soil | On neutral and alkaline soils | ||
(pH<6.5) | (pH≥6.5) | ||
Total cadmium (calculated as Cd) Total arsenic (as As) Total molybdenum (in terms of Mo) Total selenium (calculated as Se) | 5 75 10 15 | 10 75 10 15 | |
Total boron (based on water soluble B) | Sensitive crop | 5 | 5 |
Strong resistant crop | 25 | 25 | |
Strong resistant crop | 50 | 50 | |
Total nickel (in terms of Ni) Total chromium (in terms of Cr) Total copper (calculated as Cu) Total lead (in Pb) | 200 250 250 250 | 300 500 500 500 | |
Total salt and chloride | Non-salt alkaline soil | Saline-alkaline soil | |
3000 (where chloride 1000) | 2000 (where chloride 600) | ||
pH | 10.0 | 8.7 | |
1.2 When applying fly ash in accordance with this standard, the cumulative amount per acre shall not exceed 30,000 KG (based on dry ash).
In order to implement the "Environmental Protection Law of the People's Republic of China (Trial)", to prevent the pollution of agricultural fly ash against soil, crops, groundwater, surface water, and to ensure the production of agricultural, livestock and fishery and human health, this standard has been formulated.
The scope of application of this standard is the wet process of thermal power plants. After more than one year of weathering, the fly ash used to improve the soil.
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