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化工新型材料  2019, Vol. 47 Issue (3): 216-220    
  科学研究 本期目录 | 过刊浏览 | 高级检索 |
改性钾长石的制备及其对Ni2+的吸附研究
徐曼,张婷,李信用,李玲*
新疆大学化学化工学院,乌鲁木齐830046
Preparation of modified K-feldspar and Ni2+ adsorption
Xu Man ,Zhang Ting, Li Xinyong ,Li Ling
College of Chemistry and Chemical Engineering,Xinjing University,Urumqi 830046
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摘要 通过在钾长石中掺加钙复合助剂对其进行焙烧改性制备Ni2+吸附材料(MKf),由正交试验得到最佳制备条件并对其进行表征,考察MKf添加量、初始pH、振荡时间、初始浓度对MKf吸附Ni2+的影响。结果表明:MKf最佳制备条件为CaSO40.08g,CaCO30.3g,焙烧温度900℃,焙烧时间3h;MKf呈棒状结构,并有新物相CaSiO3生成;在初始Ni2+浓度为200mg/L,MFf添加量为0.2g,初始pH为4,室温吸附24h条件下,MKf对Ni2+的吸附率达到99.3%;吸附过程符合准一级动力学模型,吸附速率主要受颗粒内扩散和吸附反应控制;Langmuir等温模型能更好地描述MKf的吸附行为,最大吸附量为14.973mg/g,较改性前提高了4倍左右。
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徐曼
张婷
李信用
李玲
关键词:  钙复合助剂  钾长石  Ni2+  吸附    
Abstract: Ni2+ adsorbent(MKf) was prepared by calcining k-feldspar with calcium compound additive.The optimal conditions obtained by the orthogonal experiment and MKf were characterized.The effects of MKf on Ni2+ adsorption,including MKf addition,initial pH,oscillation time and initial concentration were discussed.The results indicated that the optimal preparation conditions were as follows:CaSO4 mass of 0.08g,CaCO3 mass of 0.3g,the roasting temperature of 900℃,the roasting time of 3h.MKF presented rodlike structure and showed new phase CaSiO3.The adsorption rate of MKF to Ni2+ could reach 99.3% under the conditions of initial Ni2+ concentration of 200mg·L-1,MKf addition of 0.2g,the initial pH of 4,the adsorption time of 24h under room temperature.The Adsorption process fited the pseudo-first-order kinetic model and the adsorption rate was mainly controlled by intra-particle diffusion and adsorption reaction.The adsorption behavior of MKf can be adequately described by langmuir isothermal model.The maximum adsorption capacity was 14.973mg·g-1,which was improved about four times over that before modification.
Key words:  calcium compound additive    K-feldspar    Ni2+    adsorption
               出版日期:  2019-03-20      发布日期:  2019-03-20      期的出版日期:  2019-03-20
基金资助: 国家自然科学基金资助项目(21467029)
通讯作者:  李玲(1965-),女,副教授,主要研究方向为重金属污染与控制。   
作者简介:  徐曼(1992-),女,硕士研究生,主要研究方向为重金属废水治理。
引用本文:    
徐曼,张婷,李信用,李玲. 改性钾长石的制备及其对Ni2+的吸附研究[J]. 化工新型材料, 2019, 47(3): 216-220.
Xu Man ,Zhang Ting, Li Xinyong ,Li Ling. Preparation of modified K-feldspar and Ni2+ adsorption. New Chemical Materials, 2019, 47(3): 216-220.
链接本文:  
http://www.hgxx.org/CN/  或          http://www.hgxx.org/CN/Y2019/V47/I3/216
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