Reclaiming Subsidized Land: An Evaluation of Coal Gangue Interlayers

Table 2

Coal gangue trace elements.

	S (%)	Cr (mg/kg)	Cu (mg/kg)	Zn (mg/kg)	As (mg/kg)	Pb (mg/kg)	Hg (mg/kg)	Cd (mg/kg)	Ni (mg/kg)
Trace elements content in coal gangue	0.34	40	60	90	<2	70	0.19	0.02	40
The average background of soil in Huainan [30]	—	64.93	24.6	80.81	10.45	30.47	0.02	0.06	25.74
Soil environment quality standard value in China [31]	—	350	100	300	20	350	1.0	1.0	60