Preparation of Mg-Al Hydrotalcite and Its Adsorption Property on Cr(VI) Anion

doi:10.11924/j.issn.1000-6850.casb15010108

Abstract

Abstract: In order to find a relatively effective adsorbent for water dissolved heavy metal anions, and to explore the optimal preparation conditions, the adsorption of Mg-Al hydrotalcite on Cr(VI) anion was studied. In the experiment, several factors, including ion ratio of Mg/Al, pH, reaction temperature and aging time, were investigated to analyze the effect of adsorption of Mg-AL-LDHs on Cr(VI) anion by single factor tests and orthogonal experiments of equilibrium adsorption. The results indicated that when the ion ratio of Mg/Al was 2:1, the pH during preparation process was 10.5, the reaction temperature was 90℃ and the aging time was longer than 24 h, as-prepared Mg-Al-LDHs showed best adsorption effect on Cr(VI) with the adsorption amount up to 10.5 mg/g. In summary, the optimal preparation conditions were determined to fabricate Mg-Al hydrotalcite with effective adsorption capacity, which might provide certain guidance for the choosing of heavy metal anion adsorption material and the research on the adsorption properties of Mg-Al hydrotalcite on Cr(VI).

Xu Wenhao,Zhu Jian,Wang Ping,Chen Yang and Huang Xiaowei. Preparation of Mg-Al Hydrotalcite and Its Adsorption Property on Cr(VI) Anion[J]. Chinese Agricultural Science Bulletin, 2015, 31(16): 212-217.

References

[1] 朱健,王平,罗文连,等.硅藻土吸附重金属离子研究现状及进展[J].中南林业科技大学学报,2011,31(7):183-189.
[2] 朱健,王平,雷明婧,等.硅藻土理化特性及改性研究进展[J].中南林业科技大学学报,2012,32(12):61-66.
[3] 朱健,王平,罗文连,等.硅藻土对Fe³⁺的吸附性能及热力学研究[J].中南林业科技大学学报:自然科学版,2010,30(12):108-115.
[4] 张烨,王平,王韬远,等.钡盐沉积改性硅藻土的制备及其吸附Pb²⁺的研究[J].环境污染与防治,2011,33(11):49-53.
[5] 雷明婧,朱健,王平,等.粘土矿物无机柱撑改性及其吸附研究进展[J].中南林业科技大学学报,2012,32(12):67-71.
[6] 张伟丽,朱健,王平,等.硅藻土对重金属离子Mn²⁺的吸附研究[J].中南林业科技大学学报,2012,32(12):72-77.
[7] Zhu J, Wang P, Lei M, et al. Polyhydroxyl-aluminum pillaring improved adsorption capacities of Pb²⁺ and Cd²⁺onto diatomite[J].Journal of Central South University,2014,21:2359-2365.
[8] Zhu J, Wang P, Lei M, et al. Analysis of the Adsorption Behaviour of Cadmium on Aluminium-Pillared Diatomite in a Solid/Liquid System Using Classical Adsorption Theory[J].Adsorption Science & Technology,2013,31(8):659-670.
[9] Pantsar-Kallio M, Reinikainen S P, Oksanen M. Interactions of soil components and their effects on speciation of chromium in soils[J].Analytica Chimica Acta,2001,439(1):9-17.
[10] 李志萍,陈肖刚,沈照理.污染河流中Cr(Ⅵ)对浅层地下水的影响研究[J].环境科学学报,2006,26(1):99-104.
[11] Chen Y, Liu H, Zhu G, et al. Pollution characteristics of the recent sediments in the Hangzhou section of the Grand Canal, China[J].Journal of Environmental Sciences (China),2004,16(1):34-39.
[12] 胡海祥.重金属废水治理技术概况及发展方向[J].中国资源综合利用,2008,26(2):22-25.
[13] 吴建军,徐仁扣,肖双成,等.阳离子表面活性剂用量对改性沸石吸附铬酸根的影响[J].生态与农村环境学报,2007,23(3):82-85.
[14] 卢晓岩,朱琨,梁莹,等.改性沸石对水中铬酸盐的吸附和解吸性能研究[J].兰州交通大学学报,2005,24(4):72-74.
[15] 张宏华,林建伟.HDTMA改性沸石对铬酸盐的吸附作用研究[J].浙江工业大学学报,2010,38(5):494-498.
[16] 吴建军,徐仁扣,肖双成.Fe/Al改性膨润土对铬酸根的吸附性能研究[J].安全与环境学报,2007,7(2):15-17.
[17] 郑丽波,叶瑛,季珊珊,等.Mg/Al型双金属氧化物对六价铬的吸附作用[J].地球化学,2004,33(2):208-214.
[18] Lazaridis N K, A souhidou D D. Kinetics of sportive removal of chromium (Ⅵ) from aqueous solutions by calcined Mg-Al-CO₃ hydrotalcite[J].Water Research,2003,37(12):2875-2882.
[19] 陆军,刘晓磊,史文颖,等.水滑石类插层组装功能材料[J].石油化工,2008,37(6):539-547.
[20] Miyata S. Anion-exchange properties of hydrotalcite-like compounds[J].Clays Clay Miner,1983,31(4):305-311.
[21] Bish D L. Anion-exchange in takovite: applications to other hydroxide minerals[J].Bull. Mineral,1980,103(170):5.
[22] Meyn M, Beneke K, Lagaly G. Anion-exchange reactions of layered double hydroxides[J].Inorganic Chemistry,1990,29(26): 5201-5207.
[23] Chatelet L, Bottero J Y, Yvon J, et al. Competition between monovalent and divalent anions for calcined and uncalcined hydrotalcite: anion exchange and adsorption sites[J].Colloids and Surfaces A: Physicochemical and Engineering Aspects,1996,111(3):167-175.
[24] Koilraj P, Kannan S. Phosphate uptake behavior of Zn Al Zr ternary layered double hydroxides through surface precipitation[J].Journal of colloid and interface science,2010,341(2):289-297.
[25] 苏继新,殷晶,屈文,等.插层水滑石的组装及对对硝基甲苯的吸附[J].中国环境科学,2009,29(5):518-523.
[26] 臧运波,侯万国,王文兴.Cr(VI)在Mg-Al型类水滑石上的吸附-脱附性研究I.吸附性[J].化学学报,2007,65(9):773-778.
[27] 潘国祥,曹枫,唐培松,等.一种水滑石的制备方法[P].国家发明专利:CN101817510A.
[28] Stanimirova T, Kirov G. Cation composition during recrystallization of layered double hydroxides from mixed (Mg, Al) oxides[J].Applied Clay Science,2003,22(6):295-301.
[29] Itaya K, Chang H C, Uchida I. Anion-exchanged clay (hydrotalcite-like compounds) modified electrodes[J].Inorganic Chemistry,1987,26(4):624-626.
[30] 谢晖,矫庆泽,段雪.镁铝型水滑石水热合成[J].应用化学,2001,18(1):70-72.
[31] 陈天虎,冯有亮,彭书传,等.层状双氢氧化物即时合成处理含Cr(VI)废水[J].环境科学,2004,25(2):89-93.
[32] 夏盛杰,倪哲明,潘国祥,等.Co/Mg/Al类水滑石对废水中Cr(VI)的吸附性能研究[J].浙江工业大学学报,2006,34(5):517-520.
[33] 谢华林,杨华林.二苯碳酰二肼分光光度法测水中Cr⁶⁺[J].常德师范学院学报:自然科学版,2001,13(2):65-66.
[34] 姚铭,申震,杜莉珍,等.水滑石类材料在水污染治理中的应用研究[J].环境科学动态,2004(4):26-28.