IJERT-Removal of Nickel from Simulated Wastewater using Pongamia Pinnata Seed Shell As Adsorbent (original) (raw)

2014, International Journal of Engineering Research and Technology (IJERT)

https://www.ijert.org/removal-of-nickel-from-simulated-wastewater-using-pongamia-pinnata-seed-shell-as-adsorbent https://www.ijert.org/research/removal-of-nickel-from-simulated-wastewater-using-pongamia-pinnata-seed-shell-as-adsorbent-IJERTV3IS060903.pdf Electroplating and metalworking industries discharge large amounts of heavy metal including nickel (Ni) ions, in their effluents have been recognized as a major problem to human health and aquatic life. Nickel exposure varies from skin irritation to damage of the lungs, nervous system, and mucous membranes. The current regulation of wastewater and drinking water standards are require contamination of heavy metal reduced up to few parts per million. Several processing techniques are available to reduce the concentrations of heavy metals in wastewater, including precipitation, flotation, ion exchange, solvent extraction, adsorption, cementation onto iron, membrane processing, and electrolytic methods. Adsorption onto activated carbon is a well-known method for removing toxic metal ions, but the high cost of activated carbon restricts its use in developing countries, so cheap and effective alternatives for the removal of heavy metals should reduce operating costs, reduce the prices of products, improve competitiveness, and benefit the environment. In this study, removal of poisonous Ni from artificially contaminated water has been investigated with the aim of detoxifying industrial effluents before their safe disposal onto land or into river waters. Low-cost natural adsorbent pongamia pinnata seed shell was used to remove Ni from synthetic wastewater. The adsorption equilibrium data correlate well with Langmuir model with regression, R2 0.925. The results showed that efficiency of pongamia pinnata seed shell for Ni ion removal was more than 95%. High adsorption capacity of the tested adsorbent makes it preferable and very attractive alternative adsorption material.