Sampling Cd Cr Cu Ni Pb Zn site Sediment Duck ND 21.2 32.2 20.6 57.7 79.6 Duck 0.3 43.5 30.9 20.8 53.1 84.5 River-1 0.1 17.6 113 10.1 316 86.8 0.9 29.2 528 120 94.3 249 River-3 0.5 27.3 20.1 12.6 118 175 Reservoir ND 3.4 9.2 8.4 55.4 78.0 Reservoir ND 3.4 9.2 8.4 55.4 78.0 Soil quality standards Dutch Optimum 0.8 100 36 35 85 140 value Action value 12 380 190 210 530 720 China Grade I 0.2 90 35 40 35 100 (natural background) Grade II 0.3 200 100 50 300 250 (agricultural and related use) III 1 300 400 200 500 500 (industrial activity) 6.3.2. Soil The soil PAH concentrations were highest at the printer roller dump site and were dominated by two- and three-ring compounds. The concentration profile for the soil collected from the burnt plastic dump site differed from the printer roller dump site. The total PAH concentration at the reservoir was low compared to the other sites. Of the sediment and soil samples, soil from the burnt plastic dump site was the most toxic because the concentration of carcinogenic compounds contributed to 43%of the total
Sampling site Cd Cr Cu Ni Pb Zn Sediment Duck ND 21.2 32.2 20.6 57.7 79.6 Duck 0.3 43.5 30.9 20.8 53.1 84.5 River-1 0.1 17.6 113 10.1 316 86.8 0.9 29.2 528 120 94.3 249 River-3 0.5 27.3 20.1 12.6 118 175 Reservoir ND 3.4 9.2 8.4 55.4 78.0 Reservoir ND 3.4 9.2 8.4 55.4 78.0 Soil quality standards Dutch Optimum value 0.8 100 36 35 85 140 Action value 12 380 190 210 530 720 China Grade I (natural background) 0.2 90 35 40 35 100 Grade II (agricultural and related use) 0.3 200 100 50 300 250 III (industrial activity) 1 300 400 200 500 500 6.3.2. Soil The soil PAH concentrations were highest at the printer roller dump site and were dominated by two- and three-ring compounds. The concentration profile for the soil collected from the burnt plastic dump site differed from the printer roller dump site. The total PAH concentration at the reservoir was low compared to the other sites. Of the sediment and soil samples, soil from the burnt plastic dump site was the most toxic because the concentration of carcinogenic compounds contributed to 43%of the total
p-9318--e-waste%20management.docx