| 诺氟沙星吸附剂生物炭-壳聚糖复合微球的制备优化 |
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| 引用本文： | 刘犇,郎印海,朱春苗,赵华轩.诺氟沙星吸附剂生物炭-壳聚糖复合微球的制备优化[J].环境科学研究,2018,31(6):1138-1143. |
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| 作者姓名： | 刘犇 郎印海 朱春苗 赵华轩 |
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| 作者单位： | 1.中国海洋大学环境科学与工程学院, 山东 青岛 266100 |
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| 基金项目： | 山东省自然科学基金项目（No.ZR2016EEM28） |
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| 摘 要： | 为了提高生物炭-壳聚糖复合微球对NOR（诺氟沙星）的吸附能力，以复合微球对NOR的吸附量为指标，考察了生物炭与壳聚糖质量比、壳聚糖脱乙酰度、戊二醛用量、交联时间、交联速率及生物炭热解温度对复合微球吸附NOR的影响，并由均匀试验确定复合微球的最佳制备条件.结果表明，生物炭与壳聚糖质量比、壳聚糖脱乙酰度、戊二醛用量、交联时间、交联速率及生物炭热解温度对复合微球吸附NOR具有明显影响.制备复合微球的关键影响因素是生物炭热解温度、戊二醛用量和交联速率.吸附NOR的复合微球最佳制备条件:生物炭热解温度为300℃、生物炭与壳聚糖质量比为5:1、壳聚糖脱乙酰度为77%、戊二醛用量为80 mL、交联速率为150 r/min、交联时间为3 h.此时，复合微球对NOR的吸附量为9.51 mg/g，且具有较高的耐酸溶性和机械强度.研究显示，复合微球能够高效吸附NOR，并且吸附后容易分离，具有修复水体污染的潜力.
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| 关 键 词： | 生物炭-壳聚糖复合微球 诺氟沙星 吸附 均匀试验 |
| 收稿时间： | 2017/9/16 0:00:00 |
| 修稿时间： | 2018/2/5 0:00:00 |
Optimal Preparation of Biochar-Chitosan Composite Microspheres for Highly Efficient Adsorption of Norfloxacin |
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| LIU Ben,LANG Yinhai,ZHU Chunmiao and ZHAO Huaxuan.Optimal Preparation of Biochar-Chitosan Composite Microspheres for Highly Efficient Adsorption of Norfloxacin[J].Research of Environmental Sciences,2018,31(6):1138-1143. |
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| Authors: | LIU Ben LANG Yinhai ZHU Chunmiao and ZHAO Huaxuan |
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| Affiliation: | 1.College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China2.Key Laboratory of Marine Environmental Science and Ecology, Ministry of Education, Ocean University of China, Qingdao 266100, China |
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| Abstract: | Norfloxacin (NOR) is one of the quinolone antibiotics and has been widely detected in the environment. Residual NOR in the aquatic environment may enhance drug resistance and contaminate drinking water, and further threatens human health. Adsorption is an attractive and favorable technique for effective NOR removal. The present study focuses on enhancing the adsorption properties of composite microspheres, which was evaluated by the adsorption capacity of NOR. Six factors were examined to ascertain the effects on the adsorption capacity of composite microspheres, which include mass ratio between biochar and chitosan, degree of deacetylation of chitosan, glutaraldehyde dosage, cross-linking time, cross-linking rate and pyrolysis temperature of biochar. The optimal condition of preparation composite microspheres was deduced by uniform design experiment. The results revealed that the selected factors have significant effects on NOR adsorption capacity. Pyrolysis temperature of biochar, glutaraldehyde dosage and cross-linking rate were the critical factors for preparation of composite microspheres. The adsorption capacity of NOR has achieved 9.51 mg/g under the optimal condition:pyrolysis temperature 300℃, mass ratio 5:1, degree of deacetylation 77%, glutaraldehyde dosage 80 mL, cross-linking rate 150 r/min and cross-linking time 3 h. In addition, composite microspheres have relatively high acid resistance and mechanical strength. In conclusion, composite microspheres could be used as an efficient adsorbent for NOR removal and conveniently separated from aqueous solution after adsorption, which have the potential in environment purification. |
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| Keywords: | biochar-chitosan composite microspheres norfloxacin adsorption uniform design experiment |
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