Effect of biochar and supper absorbent on remediation of Cadmium by sunflower(Helianthus annuus L .) from contaminated soil

Subject Areas : Journal of Food Safety and Processing

Arash Borzoo ¹ , Mohammad Reza Momayezi ² , Alireza Nowroozi ³

1 - Assistant Professor, Department of Agro-Ecology, Faculty of Agriculture, Islamic Azad University, Varamin-Pishva and Qarchak branch
2 - Assistant Professor, Department of Agro-Ecology, Faculty of Agriculture, Islamic Azad University, Varamin-Pishva and Qarchak branch
3 - A graduate of the Master's degree in Agroecology Department, Faculty of Agriculture, Varamin-Pishva and Qarchak branch

Received: 2022-11-12 Accepted : 2023-05-08 Published : 2023-08-23

Keywords: phytoremediation, Cadmium, Superabsorbent, Sunflower, Biochar,

Abstract :

This experiment was conducted in order to investigate effect of  biochar and superabsorbent in the phytoremediation of cadmium from contaminated soil by sunflower. This experiment conducted in the greenhouse of the faculyy of agriculture of Islamic azad university, Varamin-Pishva and Qarchak branch, in a factorial and completely randomized design. The treatments included biochar at 4 levels 0, 1, 2 and 4g/kg of soil and superabsorbent at 2 levels 0 and 4 g/kg of soil. The soil pots was contaminated with 60 mg/kg of cadmium from the source of cadmium sulfate and then 3 sunflower seeds of Azar Gol variety were planted in each pot. After two weeks, two of them were thinned. Plants were harvested 75 days after planting and the amount of cadmium in leaves, stems, roots, seeds and oil was measured. Also, the absorption coefficient and transfer coefficient of cadmium were calculated. The results showed that biochar and superabsorbent had a significant effect on the amount of cadmium in the stem, cadmium in the root and absorption coefficient. Regarding the interaction effect, only a significant effect was observed on the amount of cadmium in the stem. According to the obtained results, the addition of 4 grams of biochar per kilogram of soil caused the most significant increase in the amount of cadmium in the stem, root and transfer coefficient, and the lowest was observed in the control treatment. Among the superabsorbent treatments, the highest content of cadmium in the stem, root and transfer coefficient was obtained in the treatment of 4 grams of superabsorbent and the lowest content of cadmium in the stem, root and the corresponding transfer coefficient was obtained in the control treatment.