Pollution Research Paper

Vol 39, Issue 1, 2020; Page No.(151-156 )

EFFECT OF HUMIC ACID AND ZEOLITE ON UPTAKE AND TRANS LOCATION OF MERCURY BY TURNIP PLANT IN A SALINE SOIL

ALAA E. ALSALEH, ALI. R. ASTARAEI, HOJAT EMAMI AND AMIR LAKZIAN

Abstract

Contaminated soils can be remediated by various methods. For this purpose, 3 kg of saline soil in pot was treated with humic acid (HA) and zeolite (Zol) both at concentrations of 0, and 0.5 mg/kg soil, and were irrigated with three mercury levels of 0, 75 and 150 mg /L using mercuric chloride salt. Saline soil in pots were treated with three levels of Hg (0, 75 and 150 mg/L) by using mercuric chloride salt 10 days after planting. Plants were harvested 70 days after sowing, and root and shoot fresh and dry weights and mercury concentration in root and shoot of turnip were determined. The results showed that the maximum concentration of mercury occurred in roots followed by shoots.According to the results, exposure to the mercury concentrations of 75, and 150 mg/L significantly reduced the growth of turnip through diminishing the shoot fresh and dry weight, Root dry and fresh weights and Leaf No. and leaf area. As per BCF values humic acid and zeolite showed both has shown <1, 0.46 and 0.66, respectively. As per TF values humic acid and zeolite showed both has shown <1, 0.43 and 0.42 respectively.

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