摘要：

Chromium (VI) is one of the highly toxic ions released into the environment through leather processing and chrome plating industries. There are a number of methods available for the removal of Cr (VI) from industrial wastewater. In recent years, cyanobacteria were used as bioadsorbent for the removal of certain heavy metals. However, most of the conventional methods generate secondary effluent impacts on the recipient environment. The aim of the present investigation is to develop a suitable phytoremediation technology for the procumbens removal of Cr (VI) in industrial wastewater. In the present research work, a novel biomaterial, Tridax (Asteraceae), a medicinal plant was used as a bioadsorbent. The optimum pH of the experimental solution was 2.5 and batch experiments were performed. The efficiency of the activated carbon of the biomaterials for Cr (VI) removal was evaluated by studying the contact time, quantity of adsorbent and concentration of Cr (VI). The result of the present study showed that, 97 percent Cr (VI) removal in synthetic wastewater sample was achieved when 5g of the bioadsorbent was used. This method is also applied to the removal of Cr (VI Hence, it is recommended that, this bioremediation technology is a cleaner and useful methodology for the removal of Cr (VI) from the industrial wastewater) from tannery industry wastewater.

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