Effect Biochar on the absorption of lead in phytoremediation of contaminated soils by maize (Zea mays L.)

Subject Areas :

Omid Haji Najafi ¹ , Mohammadreza Momayezi ² , Hossein Ali Sheibani1 ³

1 - Agronomy Department, College of Agriculture, Islamic Azad University, Varamin- Phishva Branch, Varamin, Tehran, Iran
2 - Agronomy Department, College of Agriculture, Islamic Azad University, Varamin- Phishva Branch, Varamin, Tehran, Iran
3 - Agronomy Department, College of Agriculture, Islamic Azad University, Varamin- Phishva Branch, Varamin, Tehran, Iran.

Received: 2015-09-02 Accepted : 2016-01-10 Published : 2016-08-22

Keywords: phytoremediation, Soil Pollution, corn, Lead, Biochar,

Abstract :

Biochar as a process of pyrolysis of organic compounds and having specific characteristics which can absorb the material, leaching of nutrients and heavy metals affect. This study aimed to investigate the effect of Biochar the amount of Pb in the plant maize (Zea mays L.) in a greenhouse at the research farm of Islamic Azad University of Varamin in crop year 1394 was conducted. Factorial experiment in completely randomized design with three replications. Pb at a concentration of zero, 50, 100 and 200 milligrams per kilogram of lead sulfate salt supply Pb SO4 (respectively P0, P1, P2 and P3) as well as taking Biochar (charcoal made from almond wood) with a ratio of zero, 20 and 40% (respectively B0, B1 and B2) were considered as treatments. The results showed effects Biochar the weight of fresh and dry biomass, biomass, fresh root, stem and leaf concentration of lead in the five-percent probability level was significant. The results showed Biochar effects on fresh and dry weight, root fresh weight, the concentration of lead in roots and leaves were significant at the level of five percent. The highest shoot dry weight of the treatment (no biochar) and 50 mg Pb kg with 1.431 hot and the lowest shoot dry weight of 200 milligrams of lead per kilogram of treatment and lack of biochar with hot 0.261 at the root of the treatment of 100 mg Pb kg and 40 wt% biochar with 1.368 mg per kg and the lowest lead concentration at the root of the control (no lead) and 20 percent by weight biochar with 0.617 mg kg and the highest lead concentration in stems from the treatment of 200 mg Pb kg (and lack of biochar) with (1.239 mg kg) and the lowest concentration of lead in the stem of the treatment (no lead) and 20 percent by weight biochar (1.001 g) and the highest concentration of lead in leaves of treatment, 40% biochar with 1.941 mg per kg and the lowest lead concentration in leaves related to the treatment of 100 mg per kg of lead and 40% biochar with 0.166 mg kg. The results of this study suggest that lead pollution is causing negative effects on morphological and physiological characteristics of corn.