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首页> 外文期刊>Separation and Purification Technology >Study on the preparation of orange peel cellulose adsorbents and biosorption of Cd2+ from aqueous solution
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Study on the preparation of orange peel cellulose adsorbents and biosorption of Cd2+ from aqueous solution

机译：桔皮纤维素吸附剂的制备及水溶液对Cd2 +的生物吸附研究

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In this paper,orange peel modified with different chemical reagents as biosorbents were used to remove cadmium ion from aqueous solution.Effects of different chemical modifications on the biosorbent properties including washing,alkali saponification,cross-linking temperature and concentration of cross-linking reagent were investigated.Meanwhile,influence of pH of solution,initial cadmium concentration,shaking time and solid/liquid ratio on the removed of Cd(II) by different chemically modified biosorbents were studied.It can be concluded that cadmium ion could be removed by 0.6SCA80 (orange peel modified with 0.6 mol L_1 citric acid under 80 °C after alkali saponification) biosorbent effective and quick.We obtained a series of biosorbents with the order of cadmium: 0.6SCA80 > SOP > CA2 > CAl > PAl > PA2 > OP.For 0.6SCA80,the maximum capacity of cadmium was 0.90 mol kg-1,the optimum pH value was 6,the reaction balance was established after shaking 120 min and the optimum solid/liquid ratio was 4.3 g L_1.The desorption rate of cadmium was 94% with 0.15 mol L-1 HCl solution.A comparison of different isotherm models revealed that the Langmuir isotherm model is fitted the experimental data best.The biosorption follows the Lagergren first-order kinetics model.
机译：本文采用以不同化学试剂改性的橙皮作为生物吸附剂去除水溶液中的镉离子。不同化学改性对生物吸附性能的影响包括洗涤，碱皂化，交联温度和交联剂浓度。同时研究了溶液的pH值，初始镉浓度，振荡时间和固液比对不同化学改性生物吸附剂去除Cd（II）的影响。可以得出结论：0.6SCA80可以去除镉离子（碱性皂化后在80°C下用0.6 mol L_1柠檬酸改性橙皮）生物吸附剂快速有效，我们得到了一系列镉的生物吸附剂：0.6SCA80> SOP> CA2> CAl> PAl> PA2> OP。对于0.6SCA80，镉的最大容量为0.90 mol kg-1，最佳pH值为6，摇动120分钟后建立反应平衡，最佳固/液比tio为4.3 g L_1.0.15 mol L-1 HCl溶液中镉的解吸率为94％。不同等温模型的比较表明，Langmuir等温模型最适合实验数据。生物吸附遵循Lagergren一级动力学模型。

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