Reduction of soil heavy metal bioavailability by nanoparticles and cellulosic wastes improved the biomass of tree seedlings

Journal of Plant Nutrition and Soil Science - Tập 180 Số 6 - Trang 683-693 - 2017
Mahya Tafazoli1, Seyed Mohammad Hojjati1, Pourya Biparva2, Yahya Kooch3, Norbert Lamersdorf4
1Sari Agricultural Sciences and Natural Resources University, Department of Forestry, 481816898 Sari, Iran
2Sari Agricultural Sciences and Natural Resources University, Department of Basic Sciences, 4818168984 Sari, Iran
3Tarbiat Modares University, Department of forestry, 4641776489 Noor, Iran
4University of Göttingen Department of Temperate Soil Science Institute of Soil Science 37077 Göttingen Germany

Tóm tắt

Abstract

The purpose of this study was to use zero‐valent iron nanoparticles (nZVI) and cellulosic wastes to reduce bioavailability of lead (Pb) and cadmium (Cd), and to establish Persian maple seedlings (Acer velutinum Bioss.) in contaminated soil. One‐year‐old seedlings were planted in pots filled with unpolluted soil. Lead [Pb(NO3)2] and Cd [Cd(NO3)2] were added with concentrations of 0 (Control), 100 (Pb100), 200 (Pb200), and 300 (Pb300) mg kg−1 and 10 (Cd10), 20 (Cd20), and 30 (Cd30) mg kg−1. Cellulosic wastes were mixed with soil at the same time of planting [four levels: 0, 10 (W1), 20 (W2), 30 (W3) g 100 g−1 soil]. The nZVI was prepared by reducing Fe3+ to Fe0 and injected to pots [four levels: 0, 1 (N1), 2 (N2), and 3 (N3) mg kg−1]. Height, diameter, biomass, tolerance index of seedlings, bioavailability of heavy metals in soil, and removal efficiency of amendments were measured. The highest values of seedling characteristics were observed in N3. The highest removal efficiency of Pb (Pb100: 81.95%, Pb200: 75.5%, Pb300: 69.9%) and Cd (Cd10: 92%, Cd20: 73.7%, Cd30: 68.5%) was also observed in N3. The use of nZVI and cellulosic waste could be a proper approach for seedling establishment in forests contaminated with heavy metals.

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Thông tin xuất bản

Journal of Plant Nutrition and Soil Science

Tập 180 Số 6

683-693

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