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

Abstract

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 PhLD 50 value was suggested. The PhLD 50 value is a doze of metal in soil that causes 50% reduction of plant biomass (mg·kg -1 ). According to PhLD 50 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 PhLD 50 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.

Metals phytotoxicity assessment and phyto maximum allowable concentration

“…Moreover, the level of significance of deviations, which are considered sufficient for ecological and biological research at the 5% level (p < 0.05) was chosen. The algorithm of obtaining the PhLD 5 was represented in previous papers (Ryzhenko et al 2017b). Table 2 presents the values of PhLD 5 and PMAC for all investigated metals, as well as the background concentration in the soil (0-20 cm).…”

“…After all, the existing standards for the content of metals in environmental objects are sanitary-hygienic and focused just on human health (Lewis 1998, Smirnov et al 2002, Warne and van Dam 2008. Determination of the metals safe level in the soil for plants can help to objectively assess state of the ecosystem and prevent the metals dangerous influence on plant (Ryzhenko et al 2017b). The phyto maximum allowable concentration (PMAC) was suggested as a safe level of metal in the soil for plants.…”

Dynamic capacity modelling of soil environment carrying capacity, and developing a soil quality early warning framework for development land in China

“…At high concentration Zn causes toxicity in plants, while Cd rarely causes phytotoxicity (Ryzhenko et al, 2017). The concentration of ionic Cu in soil solution is typically very low but the form of hyperoxide radicals for example is carcinogenic when interacting with thiol compounds in cell membranes (Lockwood et al, 2015).…”

Metals Phytotoxicity Assessment and Classification

“…It relies on using the phytotoxicologic classification which includes several criteria: PhLD 50 value, PhLD 5 value, Phyto Maximum Allowable Concentration, polarity of metal compounds, Bioaccumulation. Obtaining the PhLD 50 value, PhLD 5 value, Polarity (µ) of metal compounds and assessment of trace metals by these values was represented in previous papers [20,23].…”