Cd, Zn, Cu, Pb, Co, Ni phytotoxicity assessment

Nataliia Olexandraivna Ryzhenko,Volodimir Mycolayovich Kavetsky,Sergiy Volodymyrovich Kavetsky

doi:10.17951/pjss.2017.50.2.197

Abstract

In this paper, we investigate using of probit analysis for heavy metals (Pb, Cd, Cu, Zn, Co, Ni) toxicity assessment for spring barley (Hordeum vulgare L.) in sod podzolic sandy loam and chernozem soils. Estimation of the heavy metals phytotoxicity by means of PhLD50 value was suggested. The PhLD50 value is a doze of metal in soil that causes 50% reduction of plant biomass (mg·kg-1). According to PhLD50 value, metals can be ranked by the effect on biomass reduction as: Cd>Cu>Ni>Co>Pb>Zn (sod podzolic soil) and Cd>Cu>Ni>Co>Zn>Pb (chernozem soil). Results of the study could be useful indicators of Cu, Ni, Co, Cd, Pb and Zn phytotoxicity assessment at the growing of Hordeum vulgare (L.) in heavy metals contaminated areas. The PhLD50 value demonstrates the comparative toxicity of metals. Tight correlation between studied metals phytotoxicity for plants of spring barley and polarity shift caused by adding to organic matrix – diphenilthiocarbazone (ditizone) for studied metals was observed. This approach may be prominent for metals risk assessment. This work is an attempt to extend our investigations on correlation and methods of polarity assessment and ecotoxicological risk of different groups of contaminants.

Highlights

Environmental degradation is a widely recognized global challenge
We applied the same approach – probit analysis for estimation of dose effecting 50% reduction of initial weight of plants to assess the heavy metals (HM) phytotoxicity in soils for spring barley (Hordeum vulgare L.) in condition of impact polluted sod podzolic sandy loam and chernozem soils
We suggest to estimate the heavy metals phytotoxicity by means of PhLD50 value

Summary

Introduction

Environmental degradation is a widely recognized global challenge. Some of the problems affecting the world are acid rain, global warming, hazardous wastes, over population, ozone depletion, smog and environmental pollution (Kaonga et al 2010). Heavy metals are one of the major contaminating agents in our food supply (Kaonga et al 2010, Zhang et al 2008, Gill 2014, Kabata-Pendias and Mukherjee 2007, Valavanidis and Vlachogianni 2010, Ryzhenko 2012, Ryzhenko and Kavetsky 2015, Alloway 2010). Metals are non-degradable and, they can persist for long periods in aquatic and terrestrial environments (Kaonga et al 2010, Zhang et al 2008, Liu et al 2007, Römbke and Moltmann 1996). Investigation of heavy metals phytotoxicity in polluted soil is important because pollutants concentration in crops determines the quality of agricultural products

Methods

Results

Conclusion