After treating soils by $Iag, Shale and compost at the rate of 20 mg.g-¹ soil,
on the adsorption of Zinc in sandy silt soil, sandy soil, silt clay loam soil and silt clay
soil which were conducted under laboratory conditions. These soils had received
different concentrations of Zn , there was an increase in the equilibrium concentration
in this order as follows: Control > slag> shale> Compost. The maximum adsorption
of Zn in different soils after treating with soil amendments conformed to both
Freundlich isotherm in order: EI Sadat City (sandy silt soil) > Milig Shibin Elkom (Silt
clay loamy soil) > Malanta Slovakia R. (Silt loamy soil) > EI Tahrier (Sandy soil), and
Langmuir isotherm was formed as follow: Milig Shibin Elkom (Silt clay loamy soil) > EI
Sadat City (sandy silt soil) > Malanta Slovakia R. (Silt loamy soil) > EI Tahrier (Sandy
soil). The effect of soil treatments on the maximum adsorption means in spit of soil
types can be arranged in the following order: Compost > shale> slag > control
Regression analysis between soil properties and adsorption maximum according to the Frendlich equation were weakly positive correlated as follow: Clay % (r=0.6616) >
silt +clay % (r=0.6496) > C.E.C (r=0.5825) > pH (r=0.5374) > Cac03 % (r=0.5284) >
O.M % (r =0.4835) > silt (r = 0.4268) . Also Langmuir equation in was positively correlated in the order: Clay %
(r=0.8849) > silt + clay % (r=0.7291) > C.E.C (r= 0.7288) > pH (r = 0.6730) > silt %
(r= 0.5367) > O.M (r= 5278) > CaC03 % (r= 0.2514) under different investigated soils.
Key words: Shale, Slag, compost, Zinc, adsorption value.