Effect of HEDTA, CDTA, and EGTA Chelates on Remediation of Pb- and Zn-Polluted Soil Using Sunflower and Canola Plants: A Case Study; Soil Around Bama Pb and Zn Mine

摘要: Background: The soil heavy metal pollution caused by human activities is one of the main environmental problems. Therefore, it necessary to use appropriate methods remediate such soils. Objectives: current study aimed at investigating effect Hydroxyl Ethylene Diamine Tetra Acetic Acid (HEDTA), Trans-1,2-Cyclohexylene Dinitrilo (CDTA), and Glycol-bis (β-Aminoethyl Ether)-N,N,N’,N’-Tetra (EGTA) chelates on Pb Zn removal efficiency in a contaminated soil. Methods: This research was performed as factorial experiment randomized complete block design with four levels chelate application rate (0, 1.5, 3, 4.5 mM/kg soil), two times (one or weeks before harvesting), plant types (sunflower canola). At end experiment, concentrations samples were measured least significant difference (LSD) test employed determine differences between means. Results: effectiveness studied availability descending order HEDTA > CDTA EGTA. Application under sunflower canola cultivation increase compared 1.5 12.2% 13.3%, respectively. Plant type also had increasing Conclusions: type, rate, are important factors remediation metals However, role physicochemical properties its cannot be ignored.