Table 4
The mean of heavy metal removal percentage of leachate at four value sizes
Zeolite	Size (μm)	Na	Ca	Mg	EC	pH	Pb	Cd	Ni	r
Miyaneh	840	−20.7	10.3	11	0.93	0.19	13	8.6	7.11	1.8
	270	−24	8.03	16	1.8	0.33	5.5	8.2	8.2	10.1
	140	−22.8	9.9	10	0.23	−0.06	10.4	7.01	9.2	−11
	70	−19.6	10.9	22	0.66	0.96	14.4	9.92	9.3	1.3
Mashhad	840	−15.8	3.9	9	−0.4	−0.33	6.4	8.3	10.6	11.8
	270	−12.4	7.1	1.9	0.18	−0.15	11.9	17.1	15.1	21.1
	140	−12.8	6.5	6.5	0.23	−0.3	8.05	12.3	11.6	24
	70	−14	4.8	−0.8	0.1	−0.55	8.43	21.2	8	24
Semnan	840	−14.5	11.9	8	−1.5	0.18	2.53	14.8	7.3	8.8
	270	−16.8	16.7	14	−0.8	0.33	7.2	23.8	4.7	16.8
	140	−16.1	10	21	−1.7	0.17	4.57	15.3	3.7	13.3
	70	−16.1	12.5	10	0.72	0.1	5.13	22.2	11.5	17.9

EC, salinity reduction; r, ratio.

Tabatabaei et al. International Journal Of Recycling of Organic Waste in Agriculture 2012 1:2   doi:10.1186/2251-7715-1-2