Remediation of Lead Contaminated Paddy Field Using Ramie Plants Combined with Bioremediation Agents and Inorganic Fertilizer

Abstract

Industrial waste containing heavy metals used for wetland irrigation will affect the heavy metals content in the soil. The accumulation of heavy metals in the soil may result in reducing microbial activity, soil fertility, soil quality, and heavy metals compounds in agricultural products. Agricultural products contaminated by heavy metals can influence human health. The purpose of this study was to reduce the Pb content in Pb contaminated paddy fields. This research was conducted in a contaminated paddy field using factorial research and a Completely Randomized Block Design consisting of 3 factors : P (Inorganic fertilizer), B (Bioremediation agents), T (Ramie). Every treatment combination was repeated 3 times. This study used a combination of Ramie with Rhizobium sp. I3 or manure as bioremediation agents to improve Pb uptake by plants so could decrease soil Pb. The results showed that the bioremediation agents were able to increase Pb uptake by Ramie. Rhizobium sp. I3 gave the highest Pb uptake of 103.77 mg.kg-1 or 2 more times than control. The best treatment in decreasing Pb is with inorganic fertilizer, Rhizobium sp. I3 and Ramie (P1B1T1) with Pb soil 8.57 mg.kg-1 or 8.4 % than control and with inorganic fertilizer..