Effects of initial water content and freeze-thawing cycles on adsorption and desorption of selenate in black soil of Northeast China
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摘要: 为探究冻融过程对东北黑土硒酸盐(Se(VI))吸附、解吸的影响机理,通过室内不同初始含水率及冻融次数模拟冻融循环,随后利用冻融后土壤进行Se(VI)的吸附和解吸试验,分别采用Langumuir和Freundlich方程对Se(VI)吸附过程进行拟合。结果表明:冻融显著(P < 0.05)改变了东北黑土pH值、有机质、球囊霉素相关土壤蛋白及各粒级团聚体含量,冻融后土壤Se(VI)吸附量显著高于未冻融土壤。通过拟合发现东北黑土对Se(VI)的吸附更符合Langmuir模型(R2 > 0.967),高初始含水率及冻融循环次数均增加了冻融后黑土对Se(VI)的最大吸附量及缓冲容量,同时提高了Se(VI)的解吸率。70%含水率及多次冻融循环提高了黑土对Se(VI)的吸附潜能,促进Se(VI)的解吸,使得冻融后土壤硒的生物有效性增加,有利于作物根系对硒的吸收。Abstract: In order to investigate the effects of freeze-thaw process on the adsorption and desorption of selenate (Se (VI)), black soil was subjected to freezing and thawing treatments with different moisture and cycles through indoor simulation. The soil after freezing and thawing was used for Se (VI) adsorption and desorption experiments. In addition Langumuir and Freundlich were respectively used to fit the process of Se (VI) adsorption. The results showed that both freezing and thawing significantly (P < 0.05) changed the pH value, organic matter, glomalin-related soil protein, and aggregate content of each particle size of the black soil in Northeast China.The amount of Se (VI) adsorption in the soil after freezing and thawing was significantly higher than that in the unfreezing and thawing soil. It is found that the adsorption of Se (VI) in black soil is more in line with the Langmuir model (R2 > 0.967). Both the high initial moisture content and the number of freeze-thaw cycles increased the maximum adsorption capacity, buffer capacity of black soil to Se (VI) and the desorption rate of Se (VI). The 70% of moisture content and multiple freeze-thaw cycles increased the adsorption potential of black soil for Se (VI), promoted the desorption of Se (VI), and increased the bioavailability of selenium in the soil, which would facilitate the absorption of selenium by crop roots.
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Key words:
- Initial water content /
- freeze-thaw cycles /
- black soil /
- selenate /
- adsorption and desorption
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表 1 冻融过程对东北黑土各级团聚体和平均重量直径的影响
Table 1. Effect of freeze-thaw process on aggregate contents and average weight diameter of black soil in Northeast China
处理
Treatment各级团聚体含量(mm, %)
Contents of different size aggregate groupsWSA0.25
(%)MWD
(mm)> 2 2 ~ 1 1 ~ 0.5 0.5 ~ 0.25 0.25 ~ 0.105 0.105 ~ 0.005 < 0.005 W1F0 2.51 a 29.20 ab 32.26 ab 21.27 bc 7.40 d 1.96 d 5.40 d 85.24 0.82 W1F6 1.59 a 30.17 a 29.93 ab 13.99 c 4.39 d 2.07 d 17.85 d 75.69 0.77 W1F15 0.26 b 15.68 ab 41.81 a 13.19 c 5.42 d 2.56 d 21.07 d 70.95 0.60 W1F30 0.11 b 8.74 bc 37.91 ab 23.32 ab 6.05 d 2.21 d 21.67 d 70.08 0.51 W2F0 0.09 b 11.75 bc 16.68 cd 24.81 ab 20.84 ab 5.76 a 20.07 a 54.33 0.40 W2F6 0.32 b 5.22 d 28.35 bc 30.60 ab 19.24 bc 3.83 c 12.44 c 64.49 0.41 W2F15 0.14 b 20.41 bc 34.97 ab 19.41 bc 13.31 c 4.16 bc 7.60 bc 74.93 0.64 W2F30 0.09 b 2.29 abc 8.63 d 29.13 a 23.73 a 5.13 ab 30.99 ab 40.15 0.21 注:同列不同字母表示不同处理之间差异显著(P < 0.05),MWD指土壤团聚体平均重量直径。 表 2 不同冻融处理对东北黑土基本理化性质的影响
Table 2. Effects of different freeze-thaw processes on basic physical and chemical properties in black soil of Northeast China
处理
TreatmentpH 有机质
Organic matter
(g kg−1)球囊霉素
GRSP
(mg g−1)W1F0 5.69 ± 0.015 a 37.24 ± 1.19 bc 0.47 ± 0.017 ab W1F6 5.63 ± 0.017 b 36.38 ± 0.92 bcd 0.47 ± 0.04 ab W1F15 5.55 ± 0.032 c 34.80 ± 2.74 d 0.42 ± 0.006 b W1F30 5.58 ± 0.010 c 37.22 ± 1.01 b c 0.46 ± 0.04 ab W2F0 5.52 ± 0.028 d 38.96 ± 1.52 b 0.46 ± 0.02 ab W2F6 5.50 ± 0.015 de 35.86 ± 1.10 cd 0.49 ± 0.03 a W2F15 5.41 ± 0.017 f 35.24 ± 0.73 cd 0.51 ± 0.01 a W2F30 5.46 ± 0.030 e 41.17 ± 2.43 a 0.50 ± 0.01 a 注:同列不同的小写字母表示不同处理之间差异显著(P < 0.05)。 表 3 冻融作用下Se(VI)吸附拟合方程特征参数
Table 3. Characteristic parameters of Se (VI) adsorption fitting equation under different freeze-thaw processes
处理
TreatmentLangmuir等温方程参数
Langmuir isotherm equation parametersFreundlich等温方程参数
Freundlich isotherm equation parametersQm K1 MBC R2 Kf 1/n R2 W1F0 350.24 0.017 5.95 0.990 6.30 0.92 0.987 W1F6 341.45 0.029 9.90 0.985 10.16 0.88 0.979 W1F15 847.67 0.009 7.63 0.974 7.41 0.98 0.973 W1F30 392.47 0.018 7.06 0.979 7.05 0.93 0.974 W2F0 627.12 0.010 6.27 0.993 5.96 0.96 0.993 W2F6 618.76 0.013 8.04 0.967 8.25 0.96 0.971 W2F15 2676.11 0.003 8.03 0.988 6.74 1.02 0.990 W2F30 519.49 0.014 7.27 0.977 7.11 0.95 0.979 注:MBC表示土壤对Se(VI)的最大缓冲容量。 表 4 等温吸附模型参数与土壤理化性质的相关分析
Table 4. Correlation analysis between isothermal adsorption model parameters and soil physical and chemical properties
土壤理化性质
Physical and chemical properties of soilLangmuir模型参数
Langmuir model parametersFreundlich模型参数
Freundlich model parametersQm K1 Kf 1/n pH −0.755* 0.886** 0.555 −0.887** 有机质(g kg−1) 0.510 −0.238 −0.329 −0.338 球囊霉素(mg g−1) −0.552 0.185 0.005 0.212 WSA0.25 0.155 0.194 0.234 −0.255 注:* 表示在5%水平上显著相关(n = 8); ** 表示在1%水平上显著相关(n = 8)。 -
[1] Vinceti M. Filippini T. Wise L A Environmental Selenium and Human Health: an Update. Current Environmental Health Reports[J]. Current Environmental Health Reports, 2018, 5(4): 464 − 485. doi: 10.1007/s40572-018-0213-0 [2] Schomburg L. Dietary Selenium and Human Health[J]. Nutrients, 2016, 9(1): 22. doi: 10.3390/nu9010022 [3] Rayman M P. The importance of selenium to human health[J]. The Lancet, 2000, 356(9225): 233 − 241. doi: 10.1016/S0140-6736(00)02490-9 [4] 孙梓耀, 王 菲, 崔玉军. 黑龙江省嫩江平原南部土壤硒元素的有效性与生态效应[J]. 黑龙江农业科学, 2016, (9): 43 − 48. [5] 冯璞阳, 李 哲, 者渝芸, 等. 我国18种不同理化性质的土壤对硒酸盐的吸附解吸作用研究[J]. 环境科学, 2016, 37(8): 3160 − 3168. [6] Dhillon K S, Dhillon S K. Adsorption-desorption reactions of selenium in some soils of India[J]. Geoderma, 1999, 93(1): 19 − 31. [7] Matulová M, Urik M, Bujdos M. et al Selenite sorption onto goethite: isotherm and ion-competitive studies, and effect of pH on sorption kinetics[J]. Chemical Pape, 2019, 73(12): 2975 − 2985. doi: 10.1007/s11696-019-00847-1 [8] Smažíková P, Praus L, Száková J. et al Effects of Organic Matter-Rich Amendments on Selenium Mobility in Soils[J]. Pedsophere, 2019, 9(6): 740 − 751. [9] 严 佳, 宗良纲, 杨 旎, 等. 不同pH条件和P-Se交互作用对茶园土壤Se(IV)吸附行为的影响[J]. 农业环境科学学报, 2014, 33(5): 935 − 942. doi: 10.11654/jaes.2014.05.016 [10] 赵成义. 不同土壤对亚硒酸离子和硒酸离子的等温吸附[J]. 新疆环境保护, 1992, 14(4): 38 − 42. [11] 韩 露, 万忠梅, 孙赫阳. 冻融作用对土壤物理、化学和生物学性质影响的研究进展[J]. 土壤通报, 2018, 49(3): 736 − 742. [12] 魏丽红. 冻融作用对土壤理化及生物学性质的影响综述[J]. 安徽农业科学, 2009, 37(11): 5054 − 5057. doi: 10.3969/j.issn.0517-6611.2009.11.097 [13] 赵恒策, 魏 霞, 贺 燕, 等. 冻融对土壤团聚体特征以及可蚀性K值的影响[J]. 水土保持研究, 2019, 26(5): 1 − 13. [14] Yanai Y, Toyota K, Okazaki M. Effects of successive soil freeze-thaw cycles on soil microbial biomass and organic matter decomposition potential of soils[J]. Soil Science and Plant Nutrition, 2004, 50(6): 821 − 829. doi: 10.1080/00380768.2004.10408542 [15] 钱 多, 范昊明, 周丽丽, 等. 冻融作用对棕壤磷素吸附-解吸特性的影响[J]. 水土保持学报, 2012, 26(2): 279 − 283. [16] Wang X, Li Y M, Mao N. et al The adsorption behavior of Pb2+ and Cd2+ in the treated black soil with different Freeze-Thaw frequencies[J]. Water Air and Soil Pollution, 2017, 228(5): 193. doi: 10.1007/s11270-017-3376-7 [17] 李贵圆. 冻融作用对黑土、棕壤团聚体水稳定性影响的对比研究[D]. 沈阳: 沈阳农业大学, 2012. [18] Bedini S, Pellegrino E, Avio L, et al. Changes in soil aggregation and glomalin-related soil protein content as affected by the arbuscular mycorrhizal fungal species Glomus mosseae and Glomus intraradices[J]. Soil Biology & Biochemistry, 2009, 41(7): 1491 − 1496. [19] Oztas T, Fayetorbay F. Effect of freezing and thawing processes on soil aggregate stability[J]. Catena, 2003, 52(1): 1 − 8. doi: 10.1016/S0341-8162(02)00177-7 [20] Lehrsch G A. Freeze-thaw cycles increase near-surface aggregate stability[J]. Soil Science, 1998, 163(1): 63 − 70. doi: 10.1097/00010694-199801000-00009 [21] 王 风, 韩晓增, 李良皓, 等. 冻融过程对黑土水稳性团聚体含量影响[J]. 冰川冻土, 2009, 31(5): 915 − 919. [22] 王 展, 张玉龙, 虞 娜, 等. 冻融作用对土壤微团聚体特征及分形维数的影响[J]. 土壤学报, 2013, 50(1): 83 − 88. doi: 10.11766/trxb201203080065 [23] Semenov V M, Kogut B M, Lukin S M. Effect of repeated drying-wetting-freezing-thawing cycles on the active soil organic carbon pool[J]. Eurasian Soil Science, 2014, 47(4): 276 − 286. doi: 10.1134/S1064229314040073 [24] 王 洋, 刘景双, 王国平, 等. 冻融循环作用与土壤理化效应的关系研究[J]. 地理与地理信息科学, 2007, 23(2): 91 − 96. doi: 10.3969/j.issn.1672-0504.2007.02.021 [25] 周旺明, 王金达, 刘景双, 等. 冻融对湿地土壤可溶性有机碳、氮和氮矿化的影响[J]. 生态与农村环境学报, 2008, 24(3): 1 − 6. doi: 10.3969/j.issn.1673-4831.2008.03.001 [26] 郝瑞军, 李忠佩, 车玉萍. 冻融循环交替对水稻土水溶性有机碳含量及有机碳矿化的影响[J]. 土壤通报, 2007, 38(6): 1052 − 1057. doi: 10.3321/j.issn:0564-3945.2007.06.003 [27] 田 慧, 刘晓蕾, 盖京苹, 等. 球囊霉素及其作用研究进展[J]. 土壤通报, 2009, 40(5): 1215 − 1220. [28] 周丽丽, 黄东浩, 范昊明, 等. 冻融作用对东北黑土磷素吸附-解吸过程的影响[J]. 水土保持通报, 2014, 34(6): 27 − 31. [29] 王 展, 张 良, 党秀丽, 等. 冻融作用对土壤镉动力学吸附解吸的影响[J]. 环境科学学报, 2012, 32(3): 721 − 725. [30] Du L, Dyck M, Shotyk W, et al. Lead immobilization processes in soils subjected to freeze-thaw cycles[J]. Ecotoxicology and Environmental Safety, 2020, 192: 110288. doi: 10.1016/j.ecoenv.2020.110288 [31] Li L H, Ma J C, Xu M, et al. The adsorption and desorption of Pb2+ and Cd2+ in freeze–thaw treated soils[J]. Bulletin of Environmental Contamination and Toxicology, 2016, 96(1): 107 − 112. doi: 10.1007/s00128-015-1694-2 [32] 孙跃嘉, 田 甜, 何 娜, 等. 冻融周期对棕壤性质及砷吸附解吸特性的影响[J]. 生态环境学报, 2016, 25(4): 724 − 728. [33] 冯跃华, 胡瑞芝, 张杨珠, 等. 几种粉煤灰对磷素吸附解吸特性的研究[J]. 应用生态学报, 2005, 16(9): 1756 − 1760. doi: 10.3321/j.issn:1001-9332.2005.09.033 [34] 蒋成爱, 吴启堂, 陈杖榴. 土壤中砷污染研究进展[J]. 土壤, 2004, 36(3): 264 − 270. doi: 10.3321/j.issn:0253-9829.2004.03.007 [35] 朴河春, 袁芷芸, 刘广深, 等. 硒酸盐和亚硒酸盐在土壤中吸附作用差异[J]. 土壤通报, 1996, 27(3): 130 − 132. [36] 曾祥峰, 王祖伟, 于晓曼, 等. 铁锰氧化物在碱性条件下对镉的吸附特征研究[J]. 中国地质, 2011, 38(1): 212 − 217. doi: 10.3969/j.issn.1000-3657.2011.01.023 [37] Tang C L, Huang Y P, Zhang Z Q, et al. Rapid removal of selenate in a zero-valent iron/Fe3O4/Fe2+ synergetic system[J]. Applied catalysis B: Environmental, 2016, 184: 320 − 327. doi: 10.1016/j.apcatb.2015.11.045 [38] Zhang N, Gang D D, Mcdonald L, et al. Background electrolytes and pH effects on selenate adsorption using iron-impregnated granular activated carbon and surface binding mechanisms[J]. Chemosphere, 2018, 195: 166 − 174. doi: 10.1016/j.chemosphere.2017.11.161 [39] 马志强, 王秋兵, 王 帅, 等. 冻融作用对棕壤水溶性盐和土壤氧化物的影响[J]. 水土保持学报, 2015, 29(2): 193 − 197. [40] 胡红青, 贺纪正, 李学垣. 铝(氢)氧化物对有机酸和磷酸根的竞争吸附研究[J]. 植物营养与肥料学报, 2001, 7(1): 50 − 55. doi: 10.3321/j.issn:1008-505X.2001.01.008 [41] 江承香. 名山河流域黄壤土壤微团聚体对砷(As(V))、磷(PO43-)竞争吸附-解吸的影响[D]. 雅安: 四川农业大学, 2016. [42] 黄昌勇, 徐建明. 土壤学[M]. 三版. 北京: 中国农业出版社, 2011.