Adsorption characteristics of sericite for nickel ions from industrial waste water
Adsorption characteristics of sericite for nickel ions from industrial waste water
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DOI：
10.1016/j.jiec.2012.07.002
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发表时间：
2013-01
影响因子：
6.1
通讯作者：
Taik-Nam Kwon;C. Jeon
中科院分区：
文献类型：
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作者：
Taik-Nam Kwon;C. Jeon
以绢云母为吸附剂，对高浓度Na（I）的实际工业废水中Ni（II）进行了有效吸附研究。Ni（II）的去除率不受产生离子强度的Na（I）的影响，在pH 7.5时去除率最高，约为93%。绢云母中的SiO_2和Al_2O_3基团在吸附过程中起着重要作用。吸附过程在120 min内完成，绢云母的去除率高于Amberlite IR 120 plus树脂。温度对Ni（II）去除率的影响可以忽略不计。利用扫描电子显微镜（SEM）、能谱（EDX）、红外光谱（FT-IR）等手段对绢云母的表面状态和表面官能团进行了研究。此外，以前吸附到绢云母上的Ni（II）可以很容易地和完全洗脱HNO 3。
Sericite was used as an adsorbent to efficiently remove Ni(II) from actual industrial wastewater which has Na(I) of high concentration. The removal efficiency for Ni(II) could not be affected by Na(I) which generates ionic strength and the highest removal efficiency was about 93% at pH 7.5. The silanol (SiO2) and aluminol (Al2O3) groups in sericite are likely to play important role in adsorption process. All adsorption process was completed in 120min and removal efficiency of sericite was higher than that of Amberlite IR 120 plus resin. The effect of temperature on the removal efficiency of Ni(II) was negligible. Also, to investigate the surface condition and functional groups of sericite, SEM (Scanning electron microscopy) photograph, EDX (Energy dispersive X-ray) spectrum, and FT-IR spectrum were applied. In addition, previously adsorbed Ni(II) onto sericite could be easily and completely eluted by HNO3.