引用本文:聂晨曦,徐景涛,武道吉,王宁,丁国村,等.青贮秸秆活性炭的制备和改性及其对阿莫西林的吸附特性[J].环境科学研究,2017,30(7):1120-1128.
NIE Chenxi,XU Jingtao,WU Daoji,WANG Ning,DING Guocun,et al.Preparation of Activated Carbon with Silage Stalks and its Adsorption of Amoxicillin[J].Reserrch of Environmental Science,2017,30(7):1120-1128.]
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青贮秸秆活性炭的制备和改性及其对阿莫西林的吸附特性
聂晨曦1, 徐景涛1,2, 武道吉1,2, 王 宁1, 丁国村1
1.山东建筑大学市政与环境工程学院, 山东 济南 250101 ;2.山东省绿色建筑协同创新中心, 山东 济南 250101
摘要:
为提高秸秆活性炭性能及其对AMX(阿莫西林)的吸附效果,研究了青贮秸秆活性炭的制备和改性方法及其对AMX的吸附特性. 以青贮玉米秸秆为原料,通过响应面法(RSM),在活化温度为584 ℃、浸渍比为1∶1.9的条件下,制备了AC-S(青贮活性炭)和AC-SA(改性青贮活性炭). 通过比表面积和孔径分析,AC-S和AC-SA的SBET(比表面积)分别为1 521、1 347 m2/g,两种活性炭兼具中孔和微孔. 研究了吸附动力学、热力学特性及初始ρ(AMX)、pH对吸附结果的影响. 结果表明,AC-S和AC-SA对AMX的最大吸附量分别为39.69、45.60 mg/L,均符合伪二级动力学模型和Langmuir吸附等温模型(R2>0.99),吸附形式主要为化学吸附,在酸性条件下吸附量增加. 研究显示,改性后AC-SA的酸性官能团增加45.31%,提高了其与AMX的碱性基团结合能力,因此对AMX的吸附效果更好.
关键词:  响应面  青贮活性炭  丁二酸  阿莫西林  吸附
DOI:
分类号:
基金项目:国家自然科学基金项目(21307078);国家科技支撑计划课题(2014BAK13B04);住房与城乡建设部科学技术项目计划(2014-K5-015)
Preparation of Activated Carbon with Silage Stalks and its Adsorption of Amoxicillin
NIE Chenxi1, XU Jingtao1,2, WU Daoji1,2, WANG Ning1, DING Guocun1
1.School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan 250101, China ;2.Co-Innovation Center of Green Building, Shandong, Jinan 250101, China
Abstract:
Abstract: Activated carbon derived from silage stalks and modified activated carbon were investigated to improve the adsorption performance of amoxicillin. Based on response surface method (RSM), silage corn stalks were used as raw material to prepare the activated carbon (AC-S) at 584 ℃ and the succinic acid-modified activated carbon (AC-SA) (succinic acid dosage of 0.005 mol/g) with impregnation ratio of 1∶1.9. The specific surface areas of AC-S and AC-SA were 1521 and 1347 m2/g, respectively, both of which contained certain amount of mesopores and micropores. The effects of adsorption kinetics, thermodynamic properties, initial concentrations of amoxicillin and pH on adsorption were studied, and the results showed that the maximum adsorption capacities of AC-S and AC-SA were 39.69 and 45.60 mg/L, respectively. Both adsorption processes were well fitted by pseudo-second-order kinetic model and Langmuir isotherm (R2>0.99), implying the mechanism favored chemical adsorption. After modification, the acidic functional groups on AC-SA increased by 45.31%, enhancing the binding ability of the basic groups of amoxicillin. The results showed that the adsorption capacity of amoxicillin on succinic acid modified activated carbon was higher.
Key words:  response surface methodology  silage activated carbon  succinic acid  amoxicillin  adsorption