FTIR spectroscopy and scanning electron microscopic analysis of pretreated biosorbent to observe the effect on Cr (VI) remediation |
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| Authors: | Bala Kiran Nisha Rani Anubha Kaushik |
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| Affiliation: | 1. Department of Environmental Science and Engineering, Guru Jambheshwar University of Science and Technology, Hisar, India;2. Department of Mechanical Engineering, Indian Institute of Technology, Indore, Simrol, India;3. Centre for Biosciences and Biomedical Engineering, Indian Institute of Technology, Indore, Simrol, Indiakiranb@iiti.ac.in;5. Department of Bioscience, Himachal Pradesh University, Shimla, India;6. University School of Environment Management, Guru Govind Singh Indraprastha Universiy, Dwarika, India |
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| Abstract: | Various chemical and physical treatments have been applied to indigenously isolated cyanobacterial strain, Lyngbya putealis HH-15, to observe the effect on chromium removal capacity. Pretreatment with hydrochloric acid (99.1%) and nitric acid (98.5%) resulted in enhanced chromium removal as compared to untreated control biosorbent (98.1%). Pretreatment with acetic acid (97.9%), methanol (97.0%), calcium chloride (96.0%), hot water (95.2%), and sodium hydroxide (93.9%) did not improve the chromium removal capacity of biosorbent. Fourier transform infrared spectrometry (FTIR) and scanning electron microscopy (SEM) analysis identified changes in biomass functionality and availability after physical and chemical modification—the results of which were in agreement with metal removal studies. In conclusion, this acid-treated biosorbent represents a suitable candidate to replace conventional removal technologies for metal-bearing wastewaters. |
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| Keywords: | hexavalent chromium cyanobacterial species FTIR SEM |
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