柚子皮改性前后对甲醛吸附特性的研究
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摘要
以废弃柚子皮为主要原料,考察其不同改性方法以及不同初始浓度、温度、吸附时间和pH值等吸附条件下柚子皮对溶液中甲醛的吸附效果影响,并研究其等温吸附模型和动力学模型.实验结果表明:30%H2SO4改性柚子皮吸附效果最佳;未改性柚子皮在最佳条件下,吸附率达到45%;改性柚子皮在最佳条件下,吸附率达79%;柚子皮改性前后对甲醛的吸附过程都符合Freundlich等温吸附模型,改性前柚子皮对甲醛的吸附符合一级动力学方程,改性后符合二级动力学方程.
Taking abandoned pomelo peel as the main raw material, the effects of pomelo peel on formaldehyde adsorption under different modification methods and different adsorption conditions such as initial concentration, temperature, adsorption time and pH value were investigated. And its isothermal adsorption and kinetics properties were studied. The experimental results showed that 30% H2 SO4 modified pomelo peel had the best adsorption effect. Under the best conditions, the adsorption rates of unmodified pomelo peel and modified pomelo peel reached 45% and 79% respectively. The adsorption process of formaldehyde all conformed to Freundlich isothermal adsorption model. The adsorption of formaldehyde by pomelo peel before modification accorded with the first-order kinetics equation and it conformed to the second-order kinetics equation after modification.
Taking abandoned pomelo peel as the main raw material, the effects of pomelo peel on formaldehyde adsorption under different modification methods and different adsorption conditions such as initial concentration, temperature, adsorption time and pH value were investigated. And its isothermal adsorption and kinetics properties were studied. The experimental results showed that 30% H2 SO4 modified pomelo peel had the best adsorption effect. Under the best conditions, the adsorption rates of unmodified pomelo peel and modified pomelo peel reached 45% and 79% respectively. The adsorption process of formaldehyde all conformed to Freundlich isothermal adsorption model. The adsorption of formaldehyde by pomelo peel before modification accorded with the first-order kinetics equation and it conformed to the second-order kinetics equation after modification.
引文
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[14]刘斌,顾洁,邱盼,等.稻壳活性炭对水中染料的吸附特性及其回收利用[J].环境科学学报, 2014, 34(9):2256-2264.
[2]杨波,胡成生,韦朝海.含甲醛废水的过氧化氢湿式氧化及其反应动力学[J].高校化学工程学报,2003,17(6):667-672.
[3]黄力群,张杰,田宁宁,等.用H2O2/Fe3+处理高浓度含甲醛废水的研究[J].环境工程学报, 2009, 3(7):1274-1278.
[4]奚小艳,支燎,池致超.稳定性二氧化氯对甲醛废水处理研究[J].化工中间体, 2012(3):25-27.
[5]刘雪梅,陈嘉玮,陈可欣,等.磷酸改性油茶壳活性炭吸附水中甲醛的研究[J].应用化工, 2018, 47(4):679-683.
[6]左卫元,仝海娟,史兵方.改性活性炭对废水中甲醛的吸附研究[J].安全与环境学报, 2015, 15(1):188-192.
[7]刘玲,谢绍娆.改性膨润土吸附废水溶液中甲醛的性能研究[J].工业水处理, 2012, 32(9):35-37.
[8]李章良,林小园,陈勇,等.甲醛降解菌的筛选及降解特性研究[J].环境工程学报, 2011, 5(11):2547-2551.
[9]邹君臣.柚子皮改性吸油材料的制备和性能研究[D].上海:上海大学, 2015.
[10]沈士德,徐娟.改性柚皮粉对水中Cu(Ⅱ)和Zn(Ⅱ)的吸附[J].环境科学与技术, 2010, 33(12):115-119.
[11]龙小平,王丽平,黄慧,等.改性柚子皮对六价铬的吸附性能研究[J].山东化工, 2015, 44(10):173-174, 176.
[12]王琼,付宏渊,何忠明,等.Fe Cl3改性柚子皮吸附去除水中的砷[J].环境工程学报, 2017, 11(4):2137-2141.
[13]张双杰,刑宝林,黄许光,等.柚子皮水热炭对六价铬的吸附[J].环境工程学报, 2017, 11(5):2731-2737.
[14]刘斌,顾洁,邱盼,等.稻壳活性炭对水中染料的吸附特性及其回收利用[J].环境科学学报, 2014, 34(9):2256-2264.