Table 2.

Concentrations of Heavy Metals and Soil Characteristics of E-waste Dumpsites in Lagos and Ibadan

Sampling Location	Depth (cm)	Cu	Zn	Cd	Pb	Ni	Cr	pH	TOM (%)
Lagos
LLS1	15	5,390	1,820	5.63	2,840	51.5	113	5.77	8.85
	30	3,830	1,550	5.85	1,630	36.1	110	5.77	8.63
	45	2,780	1,480	2.63	260	25.1	108	5.76	6.73
LLS2	15	50.5	220	0.45	193	17.5	114	5.80	8.32
	30	57.5	1,930	0.58	114	12.0	118	5.77	6.88
	45	50.0	1,750	0.43	142	11.0	111	5.77	3.48
Ibadan
ISS1	15	1,150	3,420	4.53	2,090	48.7	114	5.93	8.65
	30	440	161	2.28	768	27.7	107	5.88	6.79
	45	310	1,430	1.98	302	40.5	104	5.89	3.09
ISS2	15	101	1,840	6.30	1,030	46.4	103	5.84	7.95
	30	356	571	2.88	365	27.7	111	5.88	6.54
	45	1,210	815	6.50	840	41.1	105	5.89	3.06
ISS3	15	79.3	105	0.03	246	128	325	6.30	3.27
	30	51.8	77.8	0.03	253	104	117	6.17	0.88
	45	42.8	27.5	ND	178	47.5	94.0	6.10	0.36
CSS	15	3.98	47.4	0.35	6.25	0.33	3.95	6.89	1.56
	30	7.55	26.2	0.45	6.75	2.35	3.58	7.21	0.29
	45	4.75	19.8	0.50	13.8	2.23	5.08	7.07	0.24

Values presented as mg/kg

Abbreviations: ND, not detected