Effect of urban wastewater treatment plant effluent irrigation on heavy metals uptake by fenugreek (Trigonella Foenum graceum L.)

Document Type : Research Paper

Authors

1 Assistant professor= Shahid Rajaee Teacher Training University

2 Biological Sciences, Shahid Rajaee Teacher Training University

Abstract

In order to investigate of different levels of south Tehran wastewater treatment plant irrigation on fenugreek phytoremediation potential, a completely randomized design with 5 treatments (0%, 25%, 50%, 75% and 100% wastewater) and 3 replicates carried out in a greenhouse experiment. Results showed that soil chrome, copper, iron, nickel and zinc contents increased with the increase of wastewater irrigation levels. Besides, with the increase of wastewater level only iron in shoots increased and all of the heavy metals roots content decreased. Furthermore, the content of chromium, iron and zinc in roots were higher than in shoots and the content of these metals in roots higher than in soil. Soil copper and nickel contents were higher than roots and the content of these heavy metals were higher than shoots. Also, shoots and roots fresh and dry weights were decreased with the increase of wastewater levels. Therefore, it seems that fenugreek can effect on reducing chromium and zinc in soil, without transfer large amount of them to shoots.

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Volume 35, Issue 2
June 2022
Pages 403-417
  • Receive Date: 11 January 2020
  • Revise Date: 01 December 2020
  • Accept Date: 14 January 2021
  • First Publish Date: 08 March 2021