Ramin Salmasi
Abstract
Heavy metals fixation in-situ by using inorganic amendments is a method for remediation of polluted soils. The goal of this research is to determine five kinds of amendments efficiency for heavy metals fixation of waste-water-irrigated soils of Tabriz city and to suggest the best amendment/amendments. ...
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Heavy metals fixation in-situ by using inorganic amendments is a method for remediation of polluted soils. The goal of this research is to determine five kinds of amendments efficiency for heavy metals fixation of waste-water-irrigated soils of Tabriz city and to suggest the best amendment/amendments. For this purpose, solutions containing Cd, Pb, Cu, Ni, and Zn were added to 0.5 gram of five amendments including calcite, hematite, zeolite, illite, and bentonite; and 10 soil samples from around of Tabriz city. After shaking, these five element concentrations were determined in filtered solution by using atomic absorption instrument. Retention capacity percentages of these elements were calculated and the best amendments were determined by using Dunkan method. There were sharp differences of heavy metals retention between amendments. Calcite had the highest retention of Cd, Ni, and Zn; hematite the highest one of Cu and Pb; and the least one was for illite. Calcite, zeolite, bentonite, and hematite had significant (in 5 % level) higher retention capacities of Cd, Ni, and Zn in compared to 10 the soil samples. The highest retention capacities were done by calcite and hematite (without significant differences) for Pb. Calcite hematite, and zeolite had the highest retention of Cu. However, the highest retention was done by illite with significant difference with other two amendments. The retention capacities of calcite and hematite amendments for the five elements were higher than all 10 soil samples in 5% level and can cause low uptake and accumulation of these elements in agricultural crops of polluted soils of around Tabriz city.
Ramin Salmasi; Hamid Reza Peyrowan
Abstract
The most of the soil erosion and sediment yield in the Talkheh Rood watershed are mainly related to marl formations. This study was conducted to evaluate physico- chemical properties of Talkheh Rood marl samples in rill, gully, mass and badland erosion types. For this purpose, marl samples were taken ...
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The most of the soil erosion and sediment yield in the Talkheh Rood watershed are mainly related to marl formations. This study was conducted to evaluate physico- chemical properties of Talkheh Rood marl samples in rill, gully, mass and badland erosion types. For this purpose, marl samples were taken from marl sediment of homogenous work units. Twenty four samples were selected, in total. Some of main physic - chemical properties of these marls were measured in lab. These properties were pH, EC, CEC, Lime, gypsum and OC content, SAR, Na, K, Cl, Ca, Mg, clay, silt and sand percentage. These data were interpreted by ANOVA and mean comparisons analysis methods. Results showed that pH, gypsum content and sand percentage had statistically significant differences between four erosion types. Mean comparison showed that significant difference of pH, was between mass and badland erosions, sand between badland and gully ones, and gypsum, rill and gully, also badland and gully ones.
