Microwave-assisted extraction of PAHs from soils

作者：Xiong, GH; Liang, JM; Zou, SC; He, XQ; Zhang, ZX^*

来源：Chemical Journal of Chinese Universities, 1998, 19(10): 1560-1565.

• microwave-assisted extraction (MAE)
• PAHs
• soil

The procedure of microwave-assisted extraction(MAE) of PAHs from synthetic soil samples has been studied with a MK-1 pressure automatically controlled sample-dissolving system. The digestion vessels coupled with this system were improved to suit to MAE. The optimum parameters for MAE of PAHs from soil have been studied in detail. Experimental results show that the MAE efficiency was influened by the solvent type, the microwave radiation time and the soil moisture and matrix. It was found that the MAE efficiency obtained by using acetone-hexane(volume ratio 1 : 1) was some equal to by using dichloromethane. The optimum MAE conditions for 2 g dry sample are as follows: adding water to 15% moisture, then adding 30 mL acetone-hexane (volume ratio 1 : 1), microwave power being at 600 W, pressure at the first stage (0.1 similar to 0.5 MPa) and microwave heating for 6 min. The extracts were detected by HPLC. The recoveries of naphthalene, acenaphthylene, fluorene, phenanthrene, anthracene, chrysene and benzo[a]pyrene were in the range of 82.2%-94.1%. Compared with the classical Soxhlet extraction, MAE is a more efficient, time-saving and solvent-saving method.

• 出版日期1998-10
• 单位中山大学