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Efficient removal of cationic dye mixtures from water using a bio-composite adsorbent optimized with response surface methodology

机译:使用与响应面法优化的生物复合吸附剂优化的生物复合吸附剂有效除去水中的阳离子染料混合物

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摘要

Bio-composite type functional adsorbents were prepared by integrating kappa-carrageenan (KC) and copolymers of poly (N-vinylpyrrolidone-co-acrylic acid) (CP). The CP was synthesized free radically from its monomers N-vinylpyrrolidone (NVP), acrylic acid (AA) and methylene bis-acrylamide (MBA) crosslinker comonomer in the presence of KC in water. The adsorbents were characterized and used for separation of Safranine T (ST) and brilliant cresyl blue (BCB) cationic dye mixtures from water. The synthesis and process parameters for adsorption were optimized with central composite design (CCD) of the response surface methodology (RSM). Accordingly, the CPKC bio-composite adsorbent with optimized composition of 2.5?wt% of KC, 1.5?wt% of MBA and NVP: AA molar ratio of 1.3:1 showed a high adsorption capacity of 362.5?mg/g for ST and 398?mg/g of BCB dye for a binary mixture containing 100?mg/L each of the dye in a solution pH of 7 and adsorbent dose of 0.25?g/L.
机译:通过整合Kappa-carrageenan(KC)和聚(N-乙烯基吡咯烷酮 - 共丙烯酸)(CP)的共聚物来制备生物复合型功能性吸附剂。 在KC在水中,从其单体N-乙烯基吡咯烷酮(NVP),丙烯酸(AA)和亚丙烯酰基丙烯酰胺(MBA)交联剂共聚单体自由地自由地合成CP。 吸附剂的特征在于并用于分离来自水的番茄T(ST)和辉煌的番茄蓝(BCB)阳离子染料混合物。 用响应面法(RSM)的中央复合设计(CCD)优化了吸附的合成和工艺参数。 因此,CPKC生物复合吸附剂的优化组合物为2.5〜Wt%KC,1.5□MBA和NVP的WT%:AA摩尔比为1.3:1显示出ST和398的高吸附容量为362.5Ω·mg / g 用于含有100μm×mg / L的二元混合物的二元混合物的Mg / g BCB染料,溶液pH的溶液pH值7和吸附剂量为0.25Ω·克/升。

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