模拟酸雨淋溶下海泡石复合材料对污染土壤镉释放的影响

doi:10.19741/j.issn.1673-4831.2018.0145

摘要/Abstract

摘要：

为了探究改性海泡石材料对土壤中重金属的钝化效果，采用土柱模拟酸雨淋溶方法研究了天然海泡石（SEP）、二乙基二硫代氨基甲酸钠改性海泡石（SEP-DDTC）、3-巯丙基三乙氧基硅烷改性海泡石（SEP-MPTES）对污染土壤中Cd的淋溶效应。结果表明：pH=4.0的酸雨淋溶后土壤pH值上升了0.80~0.99个单位，淋出液的pH值也明显上升。SEP和SEP-MPTES处理Cd的累积淋溶量分别增加66.45%和11.49%，SEP-DDTC处理显著减少45.98%。SEP-DDTC和SEP-MPTES处理酸雨淋溶后3层土壤有效态Cd含量均低于对照，SEP-DDTC处理比SEP-MPTES处理平均低0.054 mg·kg^-1，表明SEP-DDTC是一种潜在的土壤重金属Cd修复材料。

关键词: 酸雨淋溶, 改性海泡石, Cd, 钝化

Abstract:

In order to investigate the immobilization efficiency of heavy metals in soil by functionalized sepiolite materials, the leaching effect of different materials, sepiolite (SEP), sepiolite-diethyldithiocarbamate (SEP-DDTC), sepiolite-3-mercaptopropyltriethoxysilane (SEP-MPTES) on soil polluted by Cd were measured by soil column simulated acid rain leaching. The results show that the pH values of soil increased by 0.80~0. 99 after the leaching of simulated acid rain with pH 4.0, and the pH values of leaching also increased obviously. When the acid rain pH value was 4.0, compared with the CK treatment, the SEP treatment and SEP-MPTES treatment had significant increases in accumulation leaching amount of Cd by 66.45% and 11.49%, respectively. However, the SEP-DDTC treatment had a significant decrease in accumulation leaching amount of Cd by 45.98%. Compared with three layers of soil available cadmium content after simulated acid rain, SEP-DDTC treatment and SEP-MPTES treatment were lower than CK, SEP-DDTC treatment was 0.054 mg·kg^-1 lower than SEP-MPTES treatment in average. It indicates that SEP-DDTC is a potential material for soil heavy metal Cd remediation.

Key words: acid rain leaching, functionalized sepiolite, cadmium, immobilization

中图分类号:

符云聪, 赵瑰施, 张义, 刘晨, 李鹏祥, 黎红亮, 刘代欢. 模拟酸雨淋溶下海泡石复合材料对污染土壤镉释放的影响[J]. 生态与农村环境学报, 2019, 35(2): 242-247.

FU Yun-cong, ZHAO Gui-shi, ZHANG Yi, LIU Chen, LI Peng-xiang, LI Hong-liang, LIU Dai-huan. Effect of Simulated Acid Rain on Releases of Cadmium in a Contaminated Soil Immobilized by Sepiolite-DDTC Compound[J]. Journal of Ecology and Rural Environment, 2019, 35(2): 242-247.

参考文献

[1] 马凯强.模拟酸雨对羟基磷灰石稳定化土壤镉/磷迁移及有效性的影响[D].淮南:安徽理工大学, 2016.[MA Kai-qiang.Effects of Simulated Acid Rain on the Mobility and Availability of Phosphorus and Sadmium in a Contaminated Soil Immobilized by Hydroxyapatite[D].Huainan:Anhui University of Science and Technology,2016.]
[2] CHANEY R L,REEVES P G,RYAN J A,et al.An Improved Understanding of Soil Cd Risk to Humans and Low Cost Methods to Phytoextract Cd From Contaminated Soils to Prevent Soil Cd Risks[J].Biometals,2004,17(5):549-553.
[3] ZHANG Y,PENG B Z,GAO X,et al.Degradation of Soil Properties Due to Erosion on Sloping Land in Southern Jiangsu Province,China[J].Pedosphere,2004,14(1):17-26.
[4] BROWN S,CHANEY R,HALLFRISCH J,et al.In Situ Soil Treatments to Reduce the Phyto-and Bio-Availability of Lead,Zinc,and Cadmium[J].Journal of Environmental Quality,2004,33(2):522-531.
[5] BOLAN N,KUNHIKRISHNAN A,THANGARAJAN R,et al.Remediation of Heavy Metal(Loid)s Contaminated Soils:To Mobilize or to Immobilize?[J].Journal of Hazardous Materials,2014,266:141-166.
[6] GUO G L,ZHOU Q X,MA L Q.Availability and Assessment of Fixing Additives for the in Situ Remediation of Heavy Metal Contaminated Soils:A Review[J].Environmental Monitoring & Assessment,2006,116(3):513-528.
[7] LAZAREVIC S,JANKOVIC-CASTVAN I,JOVANOVIC D,et al.Adsorption of Pb²⁺,Cd²⁺,and Sr²⁺,Ions Onto Natural and Acid-Activated Sepiolites[J].Applied Clay Science,2007,37(1/2):47-57.
[8] GARCÍA-LÓPEZ D,FERNÁNDEZ J F,MERINO J C,et al.Effect of Organic Modification of Sepiolite for PA 6 Polymer/Organoclay Nanocomposites[J].Composites Science and Technology,2010,70(10):1429-1436.
[9] 王林,徐应明,孙扬,等.海泡石及其复配材料钝化修复镉污染土壤[J].环境工程学报,2010,4(9):2093-2098.[WANG Lin,XU Ying-ming,SUN Yang,et al.Immobilization of Cadmium Contaminated Soils Using Sepiolite and Its Compound Materials[J].Chinese Journal of Environmental Engineering,2010,4(9):2093-2098.]
[10] ZHU Q H,HUANG D Y,LIU S L,et al.Flooding-Enhanced Immobilization Effect of Sepiolite on Cadmium in Paddy Soil[J].Journal of Soils and Sediments,2012,12(2):169-177.
[11] 吴玉俊,周航,朱维,等.碳酸钙和海泡石组配对水稻中Pb和Cd迁移转运的影响[J].环境工程学报,2015,9(8):4047-4054.[WU Yu-jun,ZHOU Hang,ZHU Wei,et al.Effects of Combined Amendment (Limestone+Sepiolite) on Translocation of Pb and Cd in Rice[J].Chinese Journal of Environmental Engineering,2015,9(8):4047-4054.]
[12] LIANG X F,YI X,XU Y M,et al.Two-Year Stability of Immobilization Effect of Sepiolite on Cd Contaminants in Paddy Soil[J].Environmental Science and Pollution Research,2016,23(13):12922-12931.
[13] TAVARES D S,LOPES C B,DANIEL-DA-SILVA A L,et al.The Role of Operational Parameters on the Uptake of Mercury by Dithiocarbamate Functionalized Particles[J].Chemical Engineering Journal,2014,254:559-570.
[14] FU Y C,PENG L,ZENG Q R,et al.High Efficient Removal of Tetracycline From Solution by Degradation and Flocculation With Nanoscale Zerovalent Iron[J].Chemical Engineering Journal,2015,270:631-640.
[15] 贺前锋,符云聪,赵瑰施,等.一种改性海泡石的制备方法及其在环境修复中的应用:中国,106582547A[P].
[16] DOGAN M,TURHAN Y,ALKAN M,et al.Functionalized Sepiolite for Heavy Metal Ions Adsorption[J].Desalination,2008,230(1/2/3):248-268.
[17] LIANG X F,XU Y M,SUN G H,et al.Preparation and Characterization of Mercapto Functionalized Sepiolite and Their Application for Sorption of Lead and Cadmium[J].Chemical Engineering Journal,2011,174(1):436-444.
[18] MARJANOVIC V,LAZAREVIC S,JANKOVIC-CASTVAN I,et al.Chromium (Ⅵ) Removal From Aqueous Solutions Using Mercaptosilane Functionalized Sepiolites[J].Chemical Engineering Journal,2011,166(1):198-206.
[19] MARJANOVIC V,LAZAREVIC S,JANKOVIC-CASTVAN I,et al.Adsorption of Chromium(Ⅵ) From Aqueous Solutions Onto Amine-Functionalized Natural and Acid-Activated Sepiolites[J].Applied Clay Science,2013,80/81:202-210.
[20] 张新民,柴发合,王淑兰,等.中国酸雨研究现状[J].环境科学研究,2010,23(5):527-532.[ZHANG Xin-min,CHAI Fa-he,WANG Shu-lan,et al.Research Progress of Acid Precipitation in China[J].Research of Environmental Sciences,2010,23(5):527-532.]
[21] 冯砚青.中国酸雨状况和自然成因综述及防治对策探究[J].云南地理环境研究,2004,16(1):25-28.[FENG Yan-qing.Summary of Acid Rain's Status,Causes of Natural Formation and Counter Measures Research in China[J].Yunnan Geographic Environment Research,2004,16(1):25-28.]
[22] 徐仁扣.土壤酸化及其调控研究进展[J].土壤,2015,47(2):238-244.[XU Ren-kou.Research Progresses in Soil Acidification and Its Control[J].Soils,2015,47(2):238-244.]
[23] 王代长,蒋新,卞永荣,等.模拟酸雨条件下Cd²⁺在土壤及其矿物表面的解吸动力学特征[J].环境科学,2004,25(4):117-122.[WANG Dai-chang,JIANG Xin,BIAN Yong-rong,et al.Kinetic Characteristics of Cd²⁺ Desorption in Minerals and Soils Under Simulated Acid Rain[J].Environmental Science,2004,25(4):117-122.]
[24] WEN F,HOU H,YAO N,et al.Effects of Simulated Acid Rain,EDTA,or Their Combination,on Migration and Chemical Fraction Distribution of Extraneous Metals in Ferrosol[J].Chemosphere,2012,90(2):349-357.
[25] HOU H,YAO N,LI J N,et al.Migration and Leaching Risk of Extraneous Antimony in Three Representative Soils of China:Lysimeter and Batch Experiments[J].Chemosphere,2013,93(9):1980-1988.
[26] DAI Z M,LIU X M,WU J J,et al.Impacts of Simulated Acid Rain on Recalcitrance of Two Different Soils[J].Environmental Science and Pollution Research,2013,20(6):4216-4224.
[27] 饶中秀,朱奇宏,黄道友,等.模拟酸雨条件下海泡石对污染红壤镉、铅淋溶的影响[J].水土保持学报,2013,27(3):23-27.[RAO Zhong-xiu,ZHU Qi-hong,HUANG Dao-you,et al.Effects of Sepiolite on Cd and Pb Leaching in Contaminated Red Soil Under Simulated Acid Rain[J].Journal of Soil and Water Conservation,2013,27(3):23-27.]
[28] 周国逸,小仓纪雄.酸雨对重庆几种土壤中元素释放的影响[J].生态学报,1996,16(3):251-257.[ZHOU Guo-yi,XORIO Ogura.The Influences of Acid Rain of the Liberation of Several Elements From Various Soil Types in Chongqing[J].Acta Ecologica Sinica,1996,16(3):251-257.]
[29] ABU-EL-HALAWA R,ZABIN S A.Removal Efficiency of Pb,Cd,Cu and Zn From Polluted Water Using Dithiocarbamate Ligands[J].Journal of Taibah University for Science,2017,11(1):57-65.
[30] LIAO B H,GUO Z H,PROBST A,et al.Soil Heavy Metal Contamination and Acid Deposition:Experimental Approach on Two Forest Soils in Hunan,Southern China[J].Geoderma,2005,127(1/2):91-103.
[31] 刘俐,周友亚,宋存义,等.模拟酸雨淋溶下红壤中盐基离子释放及缓冲机制研究[J].环境科学研究,2008,21(2):49-55.[LIU Li,ZHOU You-ya,SONG Chu-yi,et al.Release of Basic Cations in Red Soil Under Simulated Acid Rain and Buffering Mechanism[J].Research of Environment Sciences,2008,21(2):49-55.]
[32] 章钢娅.红壤中SO₄^2-解吸动力学研究[J].土壤学报,2001,38(2):235-240.[ZHANG Gang-ya.Kinetic Study of Sulfate Adsorption in Red Soils[J].Acta Pedologica Sinica,2001,38(2):235-240.]
[33] 钟晓兰,周生路,李江涛,等.模拟酸雨对土壤重金属镉形态转化的影响[J].土壤,2009,41(4):566-571.[ZHONG Xiao-lan,ZHOU Sheng-lu,LI Jiang-tao,et al.Effect of Simulated Acid Rains on Cd Form Transformation in Contaminated Soil[J].Soils,2009,41(4):566-571.]
[34] 曾燕君,周志军,赵秋香.蒙脱石-OR-SH复合体材料对土壤镉的钝化及机制[J].环境科学,2015,36(6):2314-2319.[ZENG Yan-jun,ZHOU Zhi-jun,ZHAO Qiu-xiang.Mechanism Study of the Smectite-OR-SH Compound for Reducing Cadmium Uptake by Plants in Contaminated Soils[J].Environmental Science,2015,36(6):2314-2319.]
[35] ROBARGE W P,JOHNSON D W.The Effects of Acidic Deposition on Forested Soils[J].Advances in Agronomy,1992,47:1-83.
[36] 徐仁扣.pH、温度和水土比对酸性土壤溶液中铝离子形态分布的影响[J].热带亚热带土壤科学,1998,7(1):26-30.[XU Ren-kou.Effect of pH,Temperature and Ratios of Water to Soil on Distribution of Al³⁺ Species in Acid Soil Solutions[J].Tropical and Subtropical Soil Science,1998,7(1):26-30.]
[37] 孟磊,章家恩,徐华勤,等.模拟酸雨及其活化Al³⁺构成的复合污染对中小型土壤动物的毒杀效果[J].生态环境学报,2011,20(10):1491-1495.[MENG Lei,ZHANG Jia-en,XU Hua-qin,et al.Killing Effects of Compound Pollution From the Simulated Acid rain and Its Activated Al³⁺ on Small and Medium-Sized Soil Animals[J].Ecology and Environmental Sciences,2011,20(10):1491-1495.]
[38] TARTAGLIONE G,TABUANI D,CAMINO G.Thermal and Morphological Characterization of Organically Modified Sepiolite[J].Microporous and Mesoporous Materials,2008,107(1/2):161-168.