Heavy metals uptake by leafy vegetables grown across railway lines of Mumbai and nearby suburb’s using irrigated wastewater
Tayade Sandeep, Chandrakant Singh, G Murali Achary
The leafy vegetables viz, Spinach, Lal Chauli, and Methi randomly collected from agricultural fields across the railway track of Central, Western and Harbour lines of Mumbai local trains at six different locations, were analyzed for heavy metals viz., Fe, Zn, Cd, Cr, Cu, Mn, and Pb using atomic absorption spectrophotometer. The heavy metal concentration was higher over year by year by using urban waste water used for irrigation use. Concentration of Iron content shows higher values in vegetable plants followed by Zinc, Manganese, Nickel, Copper, Chromium and Lead content. Spinach has higher transfer factor for the heavy metals among the three vegetables followed by Lal Chauli and Methi. Highest transfer factor is recorded for zinc metal followed by manganese. Lowest transfer factor is recorded for chromium and lead. It would be strongly recommended that consumption of vegetables by irrigated with wastewater should be restricted and continuous monitoring of vegetables from such sites should be carried out. Constructed wetland and natural plant based technology can be implemented to treat the wastewater and treated water can be used for vegetable farming, that will have very less or no impact on human after consumption of vegetables grown from such irrigated sites.