Agricultural Waste Material as Potential Adsorbent for Heavy Metal Treated Vigna radiata (L.)Wilczek Sequestering Heavy Metal Ions from Aqueous Solutions

The effect of lead acetate on the growth and biochemical characteristics of Vigna radiata, (L. ) Wilczek. Seedling was studied with different concentration (5mM, 10mM, 15mM, 20mM, 25mM) of lead acetate. The heavy metal treatment on Vigna radiata has caused a steep decline in its growth, pigment content, other biochemical characteristics and enzyme activities with increasing concentration of lead acetate. On the other hand, a bioadsorption study carried out with the low cost biosorbent sugarcane bagasse in different concentration on lead acetate treated Vigna radiata, (L. ) Wilczek on the growth, pigment content and biochemical characteristics was found improving to reduced parameters significantly than in plants subjected to untreated metal solution. The photosynthetic pigment content such chlorophyll a, chlorophyll b and total chlorophyll carotenoids and biochemical parameters such as glucose, protein content were increased after the application of bioadsorbed metal solution. But in contrast, anthocyanin, aminoacid, proline, leaf nitrate and enzyme activities such as catalase and peroxidase were found to be reduced in the bioadsorbed metal treated seedlings. From the present study, it is concluded that sugarcane bagasse is a suitable alternate for the remediation to reduce the toxic effect of the metal and to relieve Vigna radiata, (L. ) Wilczek plants from metal stress.