Using a Dielectric Capacitance Cell to Determine the Dielectric Properties of Pure Sand Artificially Contaminated with Pb, Cd, Fe, and Zn

Table 1

The basic properties of the four heavy metals [32, 33, 34].

Country/Organization	Residential area
	As	Cd	Cr	Cu	Hg	Ni	Pb	Zn
Max. limits on heavy metals applied to soils (USEPA, 2000)	75	85	1500	4300	57	420	840	7500
European Union standards	60	1–3	100–180	50–140	50	30–75	50–300	150–300
Australia	20	3	50	100	1	60	300	200
Canada	20	3	250	150	0.8	100	100	200
Germany	50	5	500	200	5	200	1000	600
UK	43	1.8	-	-	26	230	-	200
USA	0.11	20	11	270	1	210	150	1100