玉米芯生物炭对水中活性艳蓝的吸附特性
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摘要
以玉米芯为原料制备生物炭,采用SEM及比表面积分析仪对其表面形貌及孔结构进行了表征,通过批次吸附试验,研究其对水中活性艳蓝的吸附行为。结果表明:玉米芯生物炭对活性艳蓝的吸附在120 min达到平衡,吸附过程符合准二级动力学方程;Langmuir吸附模型能够很好的模拟吸附等温线,最大饱和吸附量为80.01 mg/g。吸附热力学结果显示:玉米芯生物炭对活性艳蓝的吸附是自发的,升高温度有利于吸附。
The biochar was prepared by using corncob as raw materials. The scanning electronic microscopy and specific surface area analyzer were used to characterize surface pattern and pore structure of corncob biochar. The adsorption property for reactive brilliant blue onto corncob biochar was studied by a batch of sorption technique. The results indicated that the adsorption of reactive brilliant blue on corncob biochar reached equilibrium within 120 min. The secondorder kinetic model was the best for the adsorption of reactive brilliant blue. The adsorption data could be fitted by Langmuir model and the maximum adsorption capacity was 80.01 mg/g. The thermodynamics results showed that the adsorption process was spontaneous and increasing temperature was beneficial to the adsorption.
The biochar was prepared by using corncob as raw materials. The scanning electronic microscopy and specific surface area analyzer were used to characterize surface pattern and pore structure of corncob biochar. The adsorption property for reactive brilliant blue onto corncob biochar was studied by a batch of sorption technique. The results indicated that the adsorption of reactive brilliant blue on corncob biochar reached equilibrium within 120 min. The secondorder kinetic model was the best for the adsorption of reactive brilliant blue. The adsorption data could be fitted by Langmuir model and the maximum adsorption capacity was 80.01 mg/g. The thermodynamics results showed that the adsorption process was spontaneous and increasing temperature was beneficial to the adsorption.
引文
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[2]刘艳,解立平,费学宁,等.一体式光催化-膜分离反应器处理酸性红B染料废水[J].天津工业大学学报,2011,30(2):60-64.
[3]张静,杜亚威,茹星瑶,等.pH对微气泡臭氧氧化处理染料废水影响[J].环境工程学报,2016,10(2):742-748.
[4]张卉,周宇,夏绯.开放体系中染料废水真菌脱色影响因素研究[J].安全与环境学报,2012,12(5):38-41.
[5]舒小铭,徐灿灿,文晓刚,等.铁刨花-Fenton-絮凝工艺对染料生产废水中AOX、色度和TOC的去除效果研究[J].环境科学,2016,37(7):2618-2624.
[6]尹丽,邹海燕,费陶,等.牛粪源生物炭对水中甲基紫的吸附动力学和热力学[J].环境化学,2017,36(12):2650-2657.
[7]徐雪斌,丁竹红,胡忻,等.花生壳基和木屑基生物炭对离子型染料和Pb(II)的吸附性能研究[J].环境污染与防治,2017,39(9):929-935.
[8]王丽敏,张勇虔.花生壳活性炭对水溶液中活性艳兰染料的吸附[J].吉林化工学院学报,2013,30(11):100-103.
[9]林宁,张晗,贾珍珍,等.不同生物质来源生物炭对Pb(II)的吸附特性[J].农业环境科学学报,2016,35(5):992-998.
[10]季雪琴,吕黎,陈芬,等.秸秆生物炭对有机染料的吸附作用及机制[J].环境科学学报,2016,36(5):1648-1654.
[11]马锋锋,赵保卫.玉米芯生物炭吸附水中对硝基苯酚的特性[J].环境化学,2017,36(4):898-906.
[12]陈灵智,吴瑞红,王燕,等.H3PO4活化玉米芯基活性炭的制备与表征[J].炭素技术,2015,34(6):32-36.
[13]余伟光,黎吉辉,王敦,等.香蕉茎干生物炭的制备及其对铜离子的吸附特性[J].化工进展,2017,36(4):1499-1506.