Advances in Materials Science and Engineering / 2016 / Article / Tab 4

Research Article

Solidification/Stabilization of Fly Ash from a Municipal Solid Waste Incineration Facility Using Portland Cement

Table 4

Summary of TCLP leaching results for solidified fly ash samples.

Cement/fly ash Curing timeConcentration of metals in leachate (mg/L)
CrCdPbNiCuMn

Untreated fly ash0.856.4015.501.040.19
40 CFR 261.24515100100

8 : 23 d0.7220.0840.8210.1880.1150.113
7 d0.6010.0760.6880.1820.0920.094
14 d0.5410.0730.4650.1760.0840.040
28 d0.4330.0560.2550.1690.0090.034
56 d0.4550.0570.2360.1570.0130.045

7 : 33 d0.8430.1480.9070.2000.1890.194
7 d0.5470.1060.7410.1900.1670.145
14 d0.4720.0690.6690.1560.1090.037
28 d0.3610.0440.3210.1400.0990.034
56 d0.3670.0480.1890.1380.0980.014

6 : 43 d0.8230.0941.0140.2180.1310.157
7 d0.7460.0920.5470.2070.1120.148
14 d0.4860.0730.4930.1980.0920.116
28 d0.4500.0450.4480.1760.0870.097
56 d0.5300.0570.4940.1880.0970.078

5 : 53 d0.7980.1060.8930.2450.1730.152
7 d0.4930.0880.6840.2360.0960.132
14 d0.4440.0660.2200.2250.0790.046
28 d0.4230.0480.1420.2140.0450.021
56 d0.4800.0690.2380.2050.0340.013

4 : 63 d0.8280.1040.9440.2410.1230.147
7 d0.6010.0920.6440.2210.0980.129
14 d0.4900.0800.4800.2130.0860.071
28 d0.3570.0700.3900.2150.0620.031
56 d0.3410.0670.3420.2130.0880.033

Note: “—” = not available.