Investigating the Effect of Organic Adsorbents and Nano Materials in Order to Prevent the Accumulation of Zinc in Plant and Land Degradation

One of the most important issues that put a lot of pressure on the quality of the world’s environment is the phenomenon of desertification and land degradation. Irrigation with effluent can have the greatest impact on the physical and chemical properties of the soil. Heavy metals are the most important environmental pollutants that are found in large quantities in domestic and industrial waste water. These metals are important because of their physiological effects on soil, plants and living organisms even at very low concentrations. Therefore, in this study, the effect of organic adsorbents and nanomaterial’s on reducing concentrations Heavy metals in soil and wheat plants irrigated with industrial wastewater were investigated. In this regard, using polyethylene pipes, pots used in this study were prepared. Also, special filters were made of sawdust (micro-sawdust, nano-sawdust of ornamental tree at 0.1%, nano-sawdust at 0.25%, nano-sawdust at 0.5% level). The wastewater used in this study is passed through these filters. Then, to investigate the effect of filters on the amount of zinc collected in the plant, a number of wheat seeds were planted in each pot. At the end of the experiment, soil and plant samples were prepared for each pot and the concentration of zinc metal was measured by atomic absorption (GBC). Statistical analysis of results and data analysis was performed by completely randomized design (CRD) and comparison of means using Duncan test using SPSS software version 22. The results showed that the treatment of nano sawdust at the level of 0.5%, had the greatest effect and micro-sawdust had the least effect on reducing the accumulation of zinc metal in soil and plant.