黄药酸酯改性的交联壳聚糖/聚乙烯醇颗粒从水溶液中去除重金属离子<a href="#fn1" title="提供电子补充信息（ESI）。参见DOI：10.1039 / c7ra02810e">†</a>,RSC Advances

当前位置： X-MOL 学术 › RSC Adv. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

黄药酸酯改性的交联壳聚糖/聚乙烯醇颗粒从水溶液中去除重金属离子 †
RSC Advances ( IF 3.9 ) Pub Date : 2017-05-26 00:00:00 , DOI: 10.1039/c7ra02810e
Long Lv _{1,

2,

3,

4} , Nan Chen _{1,

2,

3,

4} , Chuanping Feng _{1,

2,

3,

4} , Jing Zhang _{1,

2,

3,

4} , Miao Li _{4,

5,

6,

7}

Affiliation

合成了黄药改性的交联的壳聚糖/聚乙烯醇磁性颗粒（XCMCP），并用于从水溶液中去除Pb（II）和Cu（II）离子。为了进一步探索吸附机理，通过傅里叶变换红外光谱（FTIR），扫描电子显微镜（SEM），振动样品磁强计（VSM），X射线衍射（XRD）和X射线光电子能谱（XPS）对复合物进行了表征。）。研究了pH，接触时间和温度对吸附过程的影响。结果表明，该颗粒是超顺磁性的，饱和磁化强度为34.8 emu g ^-1，表面不规则，并成功引入了黄原酸酯基团。XCMCP对Pb（II）或Cu（II）在接近中性的pH下更好。动力学数据通过伪二级动力学模型得到了很好的描述。Langmuir和Freundlich等温线很好地拟合了平衡数据。根据Langmuir等温模型，XCMCP在328 K下对Pb（II）和Cu（II）的最大吸附容量分别为59.855和139.797 mg g ^-1。同时，温度对反应过程的影响不显着。XCMCP表现出良好的重复使用性能，并且在七个循环后仍可保持有效的吸附效率。Pb（II）和Cu（II）的机理）XCMCP上的吸附涉及N和S原子与重金属的相互作用，晶体形成和表面吸附。其中，晶体形成的贡献占主导。XCMCP的这些特性使其在实际应用中很有希望，这表明XCMCP是用于有害金属离子污染的水处理的有前途的吸附剂。

"点击查看英文标题和摘要"

Heavy metal ions removal from aqueous solution by xanthate-modified cross-linked magnetic chitosan/poly(vinyl alcohol) particles†

Xanthate-modified cross-linked magnetic chitosan/poly(vinyl alcohol) particles (XCMCP) were synthesized and applied to remove Pb(II) and Cu(II) ions from aqueous solutions. To further explore the adsorption mechanisms, the complexes were characterized by Fourier transform infrared spectroscopy (FTIR), Scanning Electron Microscope (SEM), Vibrating Sample Magnetometer (VSM), X-ray Diffraction (XRD), and X-ray Photoelectron Spectroscopy (XPS). The effects of pH, contact time, and temperature on the adsorption process were investigated. The results showed that the particles were super-paramagnetic with a saturation magnetization of 34.8 emu g⁻¹, had an irregular surface, and successfully introduced xanthate groups. The adsorption capacity of XCMCP for Pb(II) or Cu(II) was better in near-neutral pH. The kinetic data were well-described by the pseudo-second-order kinetic model. The Langmuir and Freundlich isotherms fit the equilibrium data well. Based on the Langmuir isotherm model, the maximum adsorption capacities of XCMCP at 328 K were 59.855 and 139.797 mg g⁻¹ for Pb(II) and Cu(II), respectively. Meanwhile, the effect of temperature on the reaction process was not significant. XCMCP exhibited a good property for repeated use and could still retain an effective adsorption efficiency after seven cycles. The mechanism for Pb(II) and Cu(II) adsorption onto XCMCP involves the interactions of N and S atoms with heavy metals, crystal formation and surface adsorption. Thereinto, contributions of crystal formation were dominant. These properties of XCMCP make it promising for practical use, which suggests that XCMCP is a promising adsorbent for hazardous-metal-ion-contaminated water treatment.

更新日期：2017-05-26

点击分享查看原文

点击收藏

公开下载

阅读更多本刊新发论文本刊介绍/投稿指南