Several low cost adsorbents such as xanthated saw dust, peanut skins, rice straw and hulls, peat, activated charcoal, rice husk, coconut husk and rice bran, silica, Albizzia lebbeck pods, lime, steel wool, lignin and Ablesmoschus esculentus etc.
Albizzia lebbeck pods, Groundnut shells have been procured from Thapar Institute of Engineering & Technology campus and local market respectively.
Groundnut shell, Albizzia lebbeck pods are pretreated to improve the physical characteristics of the adsorbents to prevent color leaching as well as to insolubilise the tannins.
3 parts of Groundnut and 1 part of Albizzia lebbeck) have been loaded into glass column of height 57cm and diameter 1.7cm to promote even distribution of packing, the ends of which were closed by glass wool to prevent the sorbent particles from separating and floating to design PBR.
Although Albizzia lebbeck pods had potential for biosorption but being seasonal cannot be exploited for commercialization.
Amount of Biosorbent = 10gm (3parts GNSP: 1part Albizzia lebbeck), pH = 2.5, Flow Rate = 0.3 ml/min., Total Binding capacity of Hybrid column = 61mg
Albizzia lebbeck and Groundnut shell in combination and of pure Groundnut shell column.