高效微波辐射制备Fe-MSB对磷的吸附
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摘要
采用高效微波辐射法,以Fe_2(SO_4)_3为改性剂对钠基膨润土进行改性,制得硫酸铁改性钠基膨润土(Ferric sulfate modified sodium bentonite, Fe-MSB)。通过对基本结构和形貌进行表征后,分析试样对吸附剂的吸附性能,探讨反应条件对Fe-MSB吸附磷的影响,运用吸附动力学和热力学对吸附过程进行分析。结果表明:改性后钠基膨润土的吸附性能得到明显提高;当Fe-MSB投加量为20g/L、初始pH为6、温度为303K和振荡时间为120min时,制得的Fe-MSB对磷的吸附效果最佳,磷的去除率高达98.72%;Fe-MSB吸附磷过程用准二级动力学方程表达时相关性最好;吸附规律符合Langmuir等温吸附方程,且Fe-MSB对磷的吸附以化学吸附为主,其吸附过程是一个自发进行、吸热、不可逆的过程。
In order to prepare environmentally friendly phosphorus adsorption materials and explore phosphorus adsorption law, ferric sulfate modified sodium bentonite(Fe-MSB) was prepared using Fe_2(SO_4)_3andsodium bentonite by efficient microwave irradiation method. The product as the adsorbents was characterized in terms of structure and morphology before the investigation. The influence of reaction conditions on Fe-MSB adsorption of phosphorus was first studied. Adsorption kinetics and thermodynamics were employed to analyze the adsorption process. The results showed that adsorption capacity of Fe-MSB is obviously enhanced. The phosphorus adsorption efficiency is 98.72% under the optimal conditions with Fe-MSB dosage of 20 g/L, pH of 6, temperature of 303 K and reaction time of 120 min. An experimental kinetic equation for the adsorption of phosphorus by Fe-MSB was obtained and could be well described by the pseudo-second-order kinetic model. The adsorption behavior accords well to the Langmuir isotherm equation. Moreover, the phosphorus adsorption by the Fe-MSB is mainly chemically adsorbed, spontaneous, endothermic, and irreversible.
In order to prepare environmentally friendly phosphorus adsorption materials and explore phosphorus adsorption law, ferric sulfate modified sodium bentonite(Fe-MSB) was prepared using Fe_2(SO_4)_3andsodium bentonite by efficient microwave irradiation method. The product as the adsorbents was characterized in terms of structure and morphology before the investigation. The influence of reaction conditions on Fe-MSB adsorption of phosphorus was first studied. Adsorption kinetics and thermodynamics were employed to analyze the adsorption process. The results showed that adsorption capacity of Fe-MSB is obviously enhanced. The phosphorus adsorption efficiency is 98.72% under the optimal conditions with Fe-MSB dosage of 20 g/L, pH of 6, temperature of 303 K and reaction time of 120 min. An experimental kinetic equation for the adsorption of phosphorus by Fe-MSB was obtained and could be well described by the pseudo-second-order kinetic model. The adsorption behavior accords well to the Langmuir isotherm equation. Moreover, the phosphorus adsorption by the Fe-MSB is mainly chemically adsorbed, spontaneous, endothermic, and irreversible.
引文
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[21] H.-Y. Zhu, Y.-Q. Fu, R. Jiang, et al. Adsorption Removal of Congo Red Onto Magnetic Cellulose/Fe3O4/Activated Carbon Composite: Equilibrium, Kinetic and Thermodynamic Studies[J]. Chemical Engineering Journal, 2011, 173(2): 494～502.
[22] Michael Wang. Fuel Choices for Fuel-cell Vehicles: Well-to- wheels Energy and Emission Impacts[J]. Journal of Power Sources, 2002, 112(1): 307～321.
[23] 张金利,张林林,谷鑫. 重金属Pb(II)在膨润土上去除特性研究[J]. 岩土工程学报, 2013, 35(1): 117～123.
[24] 邓红梅,王耀龙,吴宏海,等. 纳米二氧化钛对Tl(I)离子的吸附性能研究[J]. 广州大学学报(自然科学版), 2015, 3: 17～23.
[25] Baojiao Gao,Yuechao Gao,Yanbin Li. Preparation and Chelation Adsorption Property of Composite Chelating Material Poly (Amidoxime)/SiO2towards Heavy Metal Ions[J]. Chemical Engineering Journal, 2010, 158(3): 542～549.
[26] JS Piccin,MLG Vieira,JO Gon?倞alves,et al. Adsorption of FD&C Red No. 40 by Chitosan: Isotherms Analysis [J]. Journal of Food Engineering, 2009, 95(1): 16～20.
[27] 冯其明,王倩,刘琨,等. 纤蛇纹石吸附Cu(Ⅱ)的动力学及热力学研究[J]. 中南大学学报(自然科学版), 2011, 42(11): 3225～3231.
[28] 范荣玉,郑细鸣. 铅(Ⅱ)离子印迹复合膜对重金属离子的吸附热力学与吸附动力学[J]. 化工学报, 2013, 64(5): 1651～1659.
[29] 李志娟,甄卫军,庞桂林. 改性膨润土对城市污水中COD吸附的热力学行为研究[J]. 合肥工业大学学报自然科学版, 2007, 30(9): 1131～1133.
[30] M K1l1c,H Yaz1c1,M Solak. A Comprehensive Study on Removal and Recovery of Copper(II) from Aqueous Solutions by NaOH-pretreated Marrubium globosum ssp. Globosum, Leaves Powder: Potential for Utilizing The Copper(II) Condensed Desorption Solutions in Agricultural Applications[J]. Bioresource Technology, 2009, 100(7): 2130～2137.
[31] Sergei I. Lyubchik,Andrei I. Lyubchik,Olga L. Galushko,et al. Kinetics and Thermodynamics of the Cr(III) Adsorption on the Activated Carbon from Co-mingled Wastes[J]. Colloids & Surfaces A Physicochemical & Engineering Aspects, 2004, 242(1～3): 151～158.
[32] 谢永,高志凤,王红艳,卓馨,郑文雷,刘超. 秸秆黑碳的制备及吸附特性[J]. 环境工程学报, 2013, 7(8): 2968～2972.
[2] 于海琴. 膨润土基吸附材料的制备、表征及其吸附性能研究[D].中国海洋大学硕士学位论文,毕彩丰,山东,2012.
[3] 郑东升,黄瑞华,王博,张增强. 改性膨润土的制备及其对苯胺的吸附性能[J]. 材料科学与工程学报, 2012, 30(3): 136～141.
[4] 陈秋禹,田飞,等. 微波辐射改性有机膨润土对吸附甲醛性能的影响[J].石河子大学学报(自科版), 2015, 33(3): 346～350.
[5] 宋珍霞,郑伏安,徐大勇,徐建平, 蔡昌凤. 微波有机改性膨润土处理含磷废水工艺优化研究[J]. 非金属矿, 2015, 3: 65～68.
[6] 范恒,聂锦旭,吴光锋,刘世杭. 微波改性膨润土对含磷废水的吸附性能研究[J]. 非金属矿, 2014, 1: 69～71.
[7] 胡敏. Fe-Al柱撑蒙脱石的制备与表征[D].中南大学硕士学位论文,刘晓文,湖南,中南大学, 2008.
[8] 聂锦旭,唐文广,刘立凡,阮彩群. 微波强化改性膨润土的制备及其对磷吸附性能研究[J]. 非金属矿, 2010, 33(3): 74～76.
[9] 莫晓余,程培夏,许银,等. 微波改性膨润土吸附—PAM混凝联用技术处理冶炼废水中的重金属[J]. 水处理技术, 2013, 39(7): 84～88.
[10] Michael Holmboe, Susanna Wold, Mats Jonsson. Porosity Investigation of Compacted Bentonite Using XRD Profile Modeling[J]. Journal of Contaminant Hydrology, 2012, 128(128): 19～32.
[11] 曾秀琼,许映杰,张砚,刘维屏. Al-Fe柱撑膨润土的制备及其对活性艳红X-3B的吸附[J]. 浙江大学学报(理学版), 2001, 28(4): 423～427.
[12] 赵慧凯,杨昆,秦泽华,王益林. CdS/膨润土复合材料的制备及其光催化性能[J].发光学报, 2015, 36(1): 33～38.
[13] 林涛,李雪,徐永建,等. 用于除硅的铝盐改性膨润土的制备与表征[J]. 岩石矿物学杂志, 2014, 33(3): 567～573.
[14] 邵红,孙伶.铁镍交联改性膨润土的表征及对铬的吸附性能研究[J].化学世界, 2007, 48(12): 709～712.
[15] 刘学贵,刘长风,高品一,等. 聚丙烯酰胺改性膨润土防渗材料的制备及其表征[J]. 新型建筑材料, 2012, 4: 10～13.
[16] 吴光锋,聂锦旭,等. 微波强化掺Al-TiO2改性膨润土的制备及其结构表征[J]. 复合材料学报, 2015, 32(3): 769～775.
[17] 胡凤杰,赵涛涛,张勇. 壳聚糖改性膨润土对含磷废水的处理研究[J]. 世界有色金属, 2016, 6: 49～52.
[18] 陈泳,王时雨,康桂英. 凹凸棒负载Zn-Al-La类水滑石对磷的吸附[J]. 兰州理工大学学报, 2016, 42(4): 74～79.
[19] 顾玮,张俊宝,许伶俐. 改性膨润土去除含磷废水实验研究[J]. 科学技术与工程, 2011, 11(14): 3350～3353.
[20] Manjot Toor, Bo Jin. Adsorption Characteristics, Isotherm, Kinetics, and Diffusion of Modified Natural Bentonite for Removing Diazo Dye[J]. Chemical Engineering Journal, 2012, 187(2):79～88.
[21] H.-Y. Zhu, Y.-Q. Fu, R. Jiang, et al. Adsorption Removal of Congo Red Onto Magnetic Cellulose/Fe3O4/Activated Carbon Composite: Equilibrium, Kinetic and Thermodynamic Studies[J]. Chemical Engineering Journal, 2011, 173(2): 494～502.
[22] Michael Wang. Fuel Choices for Fuel-cell Vehicles: Well-to- wheels Energy and Emission Impacts[J]. Journal of Power Sources, 2002, 112(1): 307～321.
[23] 张金利,张林林,谷鑫. 重金属Pb(II)在膨润土上去除特性研究[J]. 岩土工程学报, 2013, 35(1): 117～123.
[24] 邓红梅,王耀龙,吴宏海,等. 纳米二氧化钛对Tl(I)离子的吸附性能研究[J]. 广州大学学报(自然科学版), 2015, 3: 17～23.
[25] Baojiao Gao,Yuechao Gao,Yanbin Li. Preparation and Chelation Adsorption Property of Composite Chelating Material Poly (Amidoxime)/SiO2towards Heavy Metal Ions[J]. Chemical Engineering Journal, 2010, 158(3): 542～549.
[26] JS Piccin,MLG Vieira,JO Gon?倞alves,et al. Adsorption of FD&C Red No. 40 by Chitosan: Isotherms Analysis [J]. Journal of Food Engineering, 2009, 95(1): 16～20.
[27] 冯其明,王倩,刘琨,等. 纤蛇纹石吸附Cu(Ⅱ)的动力学及热力学研究[J]. 中南大学学报(自然科学版), 2011, 42(11): 3225～3231.
[28] 范荣玉,郑细鸣. 铅(Ⅱ)离子印迹复合膜对重金属离子的吸附热力学与吸附动力学[J]. 化工学报, 2013, 64(5): 1651～1659.
[29] 李志娟,甄卫军,庞桂林. 改性膨润土对城市污水中COD吸附的热力学行为研究[J]. 合肥工业大学学报自然科学版, 2007, 30(9): 1131～1133.
[30] M K1l1c,H Yaz1c1,M Solak. A Comprehensive Study on Removal and Recovery of Copper(II) from Aqueous Solutions by NaOH-pretreated Marrubium globosum ssp. Globosum, Leaves Powder: Potential for Utilizing The Copper(II) Condensed Desorption Solutions in Agricultural Applications[J]. Bioresource Technology, 2009, 100(7): 2130～2137.
[31] Sergei I. Lyubchik,Andrei I. Lyubchik,Olga L. Galushko,et al. Kinetics and Thermodynamics of the Cr(III) Adsorption on the Activated Carbon from Co-mingled Wastes[J]. Colloids & Surfaces A Physicochemical & Engineering Aspects, 2004, 242(1～3): 151～158.
[32] 谢永,高志凤,王红艳,卓馨,郑文雷,刘超. 秸秆黑碳的制备及吸附特性[J]. 环境工程学报, 2013, 7(8): 2968～2972.