Min-Suk Kim1, Hyungi Min2, ByeongJoo Lee2, Eunjee Kim2 and Jeong-Gyu Kim2, (1)Department of Environmental Science and Ecological Engineering, Korea University, Seoul, Korea, Republic of (South) (2)Korea University, Seoul, Korea, Republic of (South)
We investigated that the effect of phosphorus (P) and iron (Fe) on the phytotoxicity of lettuce in arsenic (As)-contaminated soil using response surface methodology (RSM). To stabilize arsenic and supply nutrient, Fe and P were applied, respectively. From a chemical assessment, As extractability was decreased by Fe but increased by P. From a biological assessment, phytotoxicity test, As in lettuce roots was negatively associated with not only root elongation but also P in roots. From a confirmation study, we could verify that the former result was not a passing phenomenon and Fe was necessarily needed to protect secondary pollution by exclusive usage of phosphorus fertilizer.