PDF Download

[1]Lü Jinbang,ZHOU Beibei,WANG Quanjiu,et al.Experimental Study on Effects of Nano TiO2 on Water Movement, Solute Transport in Soil Columns[J].Research of Soil and Water Conservation,2015,22(05):58-61,66.

Copy

Experimental Study on Effects of Nano TiO₂ on Water Movement, Solute Transport in Soil Columns

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 22 Number of periods: 2015 05 Page number: 58-61,66 Column: Public date: 2015-10-28

Title:: Experimental Study on Effects of Nano TiO₂ on Water Movement, Solute Transport in Soil Columns

Author(s):: Lü Jinbang, ZHOU Beibei, WANG Quanjiu, HU Zichao, PAN Erheng; College of Water Conservancy and Hydropower, State Key Laboratory Base of Eco-Hydraulic Engineering in Arid Area, Xi’an University of Technology, Xi’an 710048, China

Keywords:: nano titanium; water infiltration; moisture characteristic curve; solute breakthrough curve; isothermal adsorption curve

CLC:: S152

DOI:: -

Abstract:: Based on disturbed one-dimensional loessial soil columns, we studied the effects of different nano TiO₂ contents (0 g/g, 0.001 g/g, 0.005 g/g, 0.01 g/g and 0.05 g/g) on water movement, solute transport as well as metal adsorption. Cumulative infiltration, the moisture characteristic curves, solute breakthrough curves and isothermal adsorption curve of heavy metals were measured separately during the experimental process. The main results were showed as follows. (1) The nano TiO₂ inhibited the process of soil water infiltration and the infiltration rate decreased with the increase of nano TiO₂ contents. (2) Nano TiO₂ can improve the water-holding capacity of soil, while under the same soil water suction, soil water contents and the inlet suction (α) increased with the increase of nano TiO₂ contents, but the shape parameter (n) decreased. (3) Nano TiO₂ improved soil solute holding ability effectively; with the increase of nano TiO₂ contents, initial penetration time advanced and the dispersivity increased, but the breakthrough time prolonged. (4) With respect to the same equilibrium concentration, the Cu²⁺ adsorption quantity increased with the increase of nano TiO₂ contents. Cu²⁺ isothermal adsorption curves could be described by the Langmuir equation, and it was found that the maximum adsorption (S_m) increased with the increase of TiO₂ contents. These results could provide the theoretical basis for the improvement of soil water and nutrient capacity as well as heavy metal pollution control.

References:: [1] 刘秀梅,冯兆滨,张树清,等.纳米-亚微米级复合材料对褐潮土有机无机复合体含量及各粒级复合体中C,N,P含量与分布的影响[J].植物营养与肥料学报,2007,13(1):57-63.
[2] 李绍家,刘凤书,杨海云,等.紫胶改性的研究[J].林业科学研究,1989,2(3):277-280.
[3] 邱惠中.纳米材料及其在航天领域中的应用[J].宇航材料工艺,1996(2):7-10.
[4] 陈军辉,尹华强,刘勇军,等.纳米碳材料及在环境保护中的应用前景[J].化工环保,2004,24(Z1):120-122.
[5] 周建敏,牛显春,农兰平.纳米TIO₂光催化处理城市生活废水的研究[J].水土保持研究,2007,14(5):35-36.
[6] 肖亚兵,钱沙华,黄淦泉,等.纳米二氧化钛对砷(Ⅲ)和砷(V)吸附性能的研究[J].分析科学学报,2003,19(2):172-174.
[7] Zheng Lei, Hong Fashui, Lu Shipeng, et al. Effect of nano-TiO₂on strength of naturally aged seeds and growth of spinach[J]. Biological Trace Element Research,2005,104(1):83-91.
[8] 刘键,张阳德,张志明.纳米增效肥料对冬小麦产量及品质影响的研究[J].安徽农业科学,2008,36(35):15578-15580.
[9] 刘键,张阳德,张志明.纳米生物技术在水稻、玉米、大豆增产效益上的应用研究[J].安徽农业科学,2008,36(36):15814-15816.
[10] 宋伟,陈百明,刘琳.中国耕地土壤重金属污染概况[J].水土保持研究,2013,20(2):293-298.
[11] 文曼.黄土高原地区生物炭的土壤水动力学效应[D].陕西杨凌:西北农林科技大学,2012.
[12] 高红贝,邵明安.温度对土壤水分运动基本参数的影响[J].水科学进展,2011,22(4):484-494.
[13] 王亚平,潘小费,岑况,等.汞和镉在土壤中的吸附和运移研究进展[J].岩矿测试,2003,22(4):277-282.
[14] Langmuir I. The adsorption of gases on plane surfaces of glass, mica and platinum[J]. Journal of the American Chemical Society,1918,40(9):1361-1403.

Similar References:

Memo

Last Update: 1900-01-01