Identification of sludge properties of environmental protection companies

4.

1.

Sampling personnel went to an environmental protection technology company in Jiangmen City to collect solid waste materials for sampling and identification of hazardous waste leaching toxicity (inorganic elements) and corrosiveness (pH)

Table 10-8 One of the sludge monitoring results

Table 10-9 Monitoring results of sludge 2

3.

The total copper, total zinc, total cadmium, total lead, total chromium, total mercury, total copper, total zinc, total cadmium, total lead, total chromium, total mercury, The mass concentration values ​​of total beryllium, total barium, total nickel, total arsenic, hexavalent chromium , fluoride, and cyanide are all lower than the identification standard value of leaching toxicity in "Identification Standard of Hazardous Wastes" (GB5085.

Reduced sludge (3) The mass concentration of total copper is 334mg/L and the mass concentration of total nickel is 23.

The pH range of nickel-containing sludge (1), copper-containing sludge (2), reduced sludge (3), reduced sludge (4), and physicochemical sludge (5) is 7.

Two of the five samples in this batch of samples have two and three leaching toxicity inorganic monitoring factors that exceed the standard limit, which can identify the batch of samples as hazardous wastes with higher risks