Volume No. 7 Issue No.: 4A Page No.: 1547-1551 April-June 2013

 

TOXICITY EFFECTS OF MUNICIPAL SEWAGE EFFLUENT ON ONION ROOTS

 

Bhatt Shashank* and Dhyani Suresh

Department of Biotechnology, NIMS University, Jaipur, Rajasthan (INDIA)

 

Received on : October 05, 2012

 

ABSTRACT

 

The sewage effluent was collected at Mandsaur ( Madhya Pradesh) India having the population of about 4-5 lacs. The sewage effluent was physically and chemically characterized. The parameters were as following pH, Electrical Conductivity (EC), Organic Carbon (OC), Nitrogen (N), Phosphorus (P), Potash (K), Sulfur (S), and heavy metals Iron (Fe), Copper (Cu), Zinc (Zn) and Manganese (Mn). The cytotoxicity effects of sewage effluent was investigated on onion roots. The onion bulbs were treated with different concentrations for 10 days and the roots length was measured everyday. The root growth was decreased when the effluent concentration increased. This result shows that the onion bulb (Allium cepa) is better grown in 20% diluted water compared to undiluted water. The crops’ quantity also improved. This type of water can be used as a biofertilizer and can improve the crops’ quality and quantity too.

 

Keywords : Allium cepa, Cytotoxicity, Heavy metals, Municipal sewage effluent, Parameters

 

 

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