Biosurfactant in Membrane Separation of Atrazine from Water
2014
Saxena, Mayank | Jain, Rakeshkumar M. | Brahmbhatt, H. | Mody, Kalpana | Bhattacharya, A.
We present the study of atrazine, the pesticide separation using the typical thin film composite (TFC) membranes, made up of polyamide formation between m-phenylenediamine (MPDA) and trimesoyl chloride (TMC) on the polysulfone membrane matrix. The unreacted acyl moieties in TFC membranes are chiefly responsible for the preferential rejection of bivalent counter ion (SO₄ ⁼) due to their residual charges compared to monovalent (Cl⁻) ion. These two low-pressure-driven membranes show the similar trend as salt and organic markers. Changing the feed matrix is also an interesting direction to improve the performance apart from choosing the membrane. This approach sheds light on the separation behaviour with the addition of biosurfactant. Biosurfactant-mediated filtration showed better performance of the membranes, though it depends on the nature of membranes. The membranes having more porous (in terms of organic markers) structure showed improvement in separation of atrazine. The increase in separation 20.29 % is observed for 200 mg/L biosurfactant for Memb-I, whereas 13.81 % increase is observed for Memb-II.
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