National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Mining, industrial processing, smelting and other industrial activities produce waste waters having toxic levels of Cu which have potential to contaminate natural water and soils. The present study focuses on the removal of Cu(II) from synthetic waste water containing Cu levels in the range of 15.9 to 143 mg L-1 onto Pine needle biochars prepared by pyrolysis at 300 (P300) and 450â—‹ C (P450). The results indicated that P450 had many fold higher Cu removal capacity which could retain 98% of Cu present in wastewater containing nearly 50 mg Cu/l. The sorption-desorption data of Cu onto P300 and P450 conformed best to Langmuir isotherm as compared to Freundlich adsorption model. Adsorption maxima for Cu sorption of P300 and P450 were 1068.5 and 3516.0 mg kg-1, respectively. The values of constant (k) related to bonding energy P300 and P450 were 0.094 and 0.741 kg mg-1, respectively. Hysteresis index calculated from Freundlich isotherms (n des./n ads.) were 37.3 and 299.5 for P300 and P450, respectively which clearly indicated an irreversible binding of Cu onto pine biochar which might work as a potential cheap adsorbent for remediation of Cu loaded toxic wastewaters.
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