Evaluation of Growth and Nutrient Profiles of Phaseolus vulgaris L. in Soil Treatment with Paint Waste Water

Abstract

 Samuel Eguom Osim, Benefit Onu

The effects of paint wastewater on the growth and nutrient contents of Phaseolus vulgaris L were examined. Paint wastewater used for this study was obtained from discarded used paint buckets around construction sites in Otuoke, Bayelsa State,
Nigeria. The paint wastewater sample was adjusted to concentration levels of 20, 40, 60, 80, and 100% as contamination
treatments alongside a control treatment (0%). Viable seeds of the test crop were sown in soil (2kg sandy loamy) per treatment. Growth parameters and mineral element content of the test crop were determined using standard procedures. This study showed that growth parameters such as shoot length, root length, leaf number, leaf length, leaf width, and petiole length of P. vulgaris seedlings significantly (P< 0.05) decreased with an increase in the concentration of paint wastewater with values relatively lower than that of the control. The calcium, sodium, potassium, magnesium, zinc, copper and iron contents in the leaves of P. vulgaris at 20%, 40%, 60%, 80%, and 100% concentrations of paint wastewater significantly (P < 0.05) increased with an increase in the concentration of paint wastewater, however, the concentration of calcium was relatively lower than that of 0% concentration of paint wastewater, while those of sodium, potassium, magnesium, zinc, copper and iron were relatively lower than that of 0% concentration. Conversely, the phosphorus content at 20%, 40%, 60%, 80% and 100% concentrations of paint waste water decreased with an increase in the concentration of paint wastewater, but with the values recorded here relatively higher
than that of 0% concentration of paint wastewater. Therefore, this result showed that paint wastewater had deleterious effects on the growth and nutrient contents of P. vulgaris. Therefore, paint waste water is not a good source of irrigation water for the test crop