• Vandana Gupta
• Naresh Chandra

The discharge of heavy metals from industrial effluents has been a major concern in the present era. Heavy metals not only cause pollution to the air, water and soil but also cause various health hazards. Various methods are available for the removal of heavy metals from industrial effluents but all these methods are costly and involve tedious techniques. The present work reports a cost effective, rapid and easy method to remove metal ions viz. Cu(II), Cr(VI), Pb(II) and Zn(II) from industrial effluents using powder lemon peels through biosorption process. The factors viz. pH, temperature, biosorbent dosage and contact time affecting biosorption process were investigated. Lemon peels were found to be efficient to remove Cu(II), Cr(VI), Pb(II) and Zn(II) ions from effluents of electroplating, textile, powder coating and chemical industries. The surface morphology of lemon peels showed distinct changes after biosorption process which was observed under Scanning Electron Microscope (SEM). Further, the desorption of adsorbed metal ions from powder lemon peels were studied by using various eluents viz. HNO3, NaOH, EDTA and deionized water. EDTA was found to be best desorbing agent as compared to other eluents for the recovery of metal ions. The use of lemon peels (waste) as biosorbent can help in environmental sustainability as it combines two goals i.e. the removal of heavy metals from wastewaters and the reuse of waste materials thus resulting in green technology.

Lemon peels, Biosorption, metal ions, desorbing agent, SEM analysis.

"BIOSORPTION AND RECOVERY OF Cu(II), Cr(VI), Pb(II) AND Zn(II) IONS FROM INDUSTRIAL EFFLUENTS BY USING LEMON PEELS", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 5, page no.119-125, May-2019, Available :http://www.jetir.org/papers/JETIRCB06016.pdf

"BIOSORPTION AND RECOVERY OF Cu(II), Cr(VI), Pb(II) AND Zn(II) IONS FROM INDUSTRIAL EFFLUENTS BY USING LEMON PEELS", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 5, page no. pp119-125, May-2019, Available at : http://www.jetir.org/papers/JETIRCB06016.pdf