| 磁性壳聚糖接枝聚丙烯酰胺去除水体中腐殖酸 |
| 摘要点击 1706 全文点击 642 投稿时间：2018-03-13 修订日期：2018-06-11 |
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| 中文关键词 磁性吸附剂 制备 水源水 腐殖酸(HA) 吸附性能 磁改性壳聚糖接枝聚丙烯酰胺 |
| 英文关键词 magnetic adsorbent preparation source water humic acid(HA) adsorption performance MC-g-PAM |
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| 中文摘要 |
| 针对水源水中天然有机物腐殖酸的高效去除，采用原位共沉淀法研发出一种磁改性壳聚糖接枝聚丙烯酰胺（MC-g-PAM）的吸附剂，运用傅氏转换红外线光谱分析仪（FTIR）、扫描电子显微镜（SEM）、振动样品磁强计（VSM）、比表面积测试仪（BET）等对其进行表征分析，并借助批处理试验，探讨了MC-g-PAM对水样中腐殖酸的去除效能及机制.结果表明，所制备的MC-g-PAM比表面积和比饱和磁化强度值分别为27.065 m2·g-1和9.63 emu·g-1.MC-g-PAM对腐殖酸的吸附过程是吸热过程，Langmuir等温线模型和准二级动力学方程对吸附过程的拟合度较高.25℃时，MC-g-PAM对腐殖酸的理论饱和吸附量达到120.77 mg·g-1. |
| 英文摘要 |
| For high-efficiency removal of humic acid (HA), a natural organic matter in the water source, an adsorbent named magnetically modified chitosan-grafted polyacrylamide (MC-g-PAM) was developed by using an in situ coprecipitation method. Analytical instruments, such as a Fourier transform infrared (FTIR) spectroscope, scanning electron microscope (SEM), vibrating sample magnetometer (VSM), and specific surface area tester (BET), were used to characterize and analyze this material. With the aid of batch tests, the removal efficiency and mechanism of humic acid in water samples were investigated. The results show that the specific surface area and specific saturation magnetization values of the prepared MC-g-PAM are 27.065 m2·g-1 and 9.63 emu·g-1, respectively. The adsorption of humic acid by MC-g-PAM is an endothermic process and the Langmuir isotherm model and the pseudo-second-order kinetic equation fit the adsorption process well. At 25℃, the equilibrium adsorption capacity of MC-g-PAM to humic acid reaches 120.77 mg·g-1. |
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