Heavy metal concentration in iron slags (ppm)									Reference
Fe	Cr	Mn	Co	Cd	Ni	Pb	Cu	Zn	Reference
430000	11000	46000	*nd	nd	nd	759	500	3531	Guinea et al. [13]
271100	nd	13800	nd	nd	nd	<7.50	nd	nd	Alamoudi and Almehmadi [14]
29.82	910	nd	7.86	<1	7.44	6.83	4.21	9.13	Legret et al. [15]
327000	2760	33300	50	nd	1000	2200	3500	1075000	Rizescu et al. [16]
74190	122	nd	nd	13	nd	381	84	2528	Zhang et al. [17]
16.6	85	48	11.1	nd	nd	nd	100	72	Ene et al. [18]
124240	1110	50690	52.5	*bd	23.13	20.94	98.38	1840	This work (IFS)
14029	689	67870	100.94	bd	9.38	bd	bd	575	This work (LFS)