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首页> 外文期刊>Journal of Polymers and the Environment >Adsorption of Zn(Ⅱ) and Pb(Ⅱ) Ions from Aqueous Solution Using Chitosan Cross-Linked Formaldehyde Adsorbent to Protect the Environment
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Adsorption of Zn(Ⅱ) and Pb(Ⅱ) Ions from Aqueous Solution Using Chitosan Cross-Linked Formaldehyde Adsorbent to Protect the Environment

机译：用壳聚糖交联甲醛吸附剂吸附Zn（Ⅱ）和Pb（Ⅱ）离子的水溶液，保护环境

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Synthesis of chitosan cross-linked formaldehyde was successfully prepared from shrimp chitosan. Characterization of the adsorbent using functional properties such as Fourier transform infrared spectroscopy and scanning electron microscope shows the present of amide and hydroxyl groups at their respective position, also the morphological structure of the adsorbent. Adsorption study of the above adsorbent was carry out for the removal of Zn(II) and Pb(II) from aqueous solution. The effect of cross-linked chitosan dosage, initial concentration, contact time, temperature and pH of the solution for the removal of Zn(II) and Pb(II) were discussed. The optimum dosage required for the removal of Zn(II) and Pb(II) were found to be at 0.4g at the maximum temperature of 25 degrees C and the percentage removal were 20.34 and 13.54% respectively. The time required for equilibrium to be reached was 50min. Effectiveness of the cross-linked adsorbent was observed to increase by increase in contact time. Further studies were also done on isotherms and kinetics of Zn(II) and Pb(II) removal from aqueous solution using chitosan cross-linked formaldehyde. Adsorption Isotherm study conducted from the cross-linked absorbent, shows that the Langmuir plot for the removal of Zn(II) was best fitted with R-2 value of 0.9934, and the adsorption process follows the pseudo second order kinetics with an R-2 value of 0.996. This adsorption process was established to be reversible with an R-L values of zinc (0.8232) and lead (0.8853) respectively. Therefore this implies a successfully reduction in the adsorption of zinc and lead ions from cross-linked formaldehyde solution to protect our environment.
机译：用虾壳聚糖成功制备壳聚糖交联甲醛的合成。使用傅里叶变换红外光谱和扫描电子显微镜等功能性的吸附剂的表征显示了它们各自位置的酰胺和羟基的本发明，也是吸附剂的形态学结构。上述吸附剂的吸附研究进行从水溶液中除去Zn（II）和Pb（II）。讨论了交联壳聚糖剂量，初始浓度，接触时间，温度和pH的去除去除Zn（II）和Pb（II）的效果。发现除去Zn（II）和Pb（II）所需的最佳剂量在25℃的最高温度下为0.4g，分别去除百分比和13.54％。达到均衡所需的时间为50分钟。观察到交联吸附剂的有效性以增加接触时间增加。还使用壳聚糖交联甲醛从水溶液中除去水溶液的等温线和Zn（II）和Pb（II）的进一步研究。从交联吸收剂进行的吸附等温线研究表明，用于去除Zn（II）的Langmuir图最佳地配有0.9934的R-2值，并且吸附过程遵循伪二阶动力学用R-2价值0.996。建立该吸附过程以可与锌（0.8232）和铅（0.8853）的R-L值逆转。因此，这意味着成功地减少了来自交联甲醛溶液的锌和铅离子的吸附以保护我们的环境。

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