Tessier法和改进BCR法提取施加熟污泥后黄土中Cd的对比研究
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摘要
探究适合于施加熟污泥改良后的我国西北干旱区、半干旱区贫瘠黄土中Cd形态分析的方法,对防治黄土Cd污染具有重要意义。分别采用Tessier和改进BCR连续提取法分析了施加熟污泥后黄土中Cd形态。施加熟污泥后,黄土中Cd胁迫增大,Tessier和改进BCR连续提取法测定的FMO、OM含量较对照组均稳定增加,而RES无明显变化,Cd形态再分布未趋向RES稳定矿化。使用Tessier连续提取法,施加熟污泥后的黄土Cd形态主要为AC;使用改进BCR连续提取法,随着施加熟污泥黄土Cd胁迫增大,AC渐为主要形态。改进BCR连续提取法测得的Cd形态含量及分布更为显著,生物有效性相关系数大,生物有效性拟合结果更高(P<0. 01),因此认为其更适合施加熟污泥后黄土Cd形态分析研究。
It is of great significance for preventing and controlling Cd contaminated loess to determine Cd fractionation analysis method which is suitable for barren loess applied composted sludge in arid and semi-arid areas of northwest China. This paper researched on the fractionation of Cd in loess amended by composted sludge by Tessier and modified BCR sequential extraction procedures respectively. With application of composted sludge,the Cd stress in the loess increased,and the contents of FMO and OM extracted by Tessier and improved BCR also increased stably compared with the control group,while RES showed no remarkable change and Cd fraction re-distribution showed no stable mineralization to RES. AC was the main Cd fraction in loess amended by composted sludge by Tessier sequential extraction. While for modified BCR sequential extraction,with the increase of Cd stress on loess amended by composted sludge,the AC gradually became the dominant fraction. The content and distribution of Cd fractions extracted by modified BCR were more significant,the correlation coefficient of bioavailability was larger,and the fitting result of bioavailability was better( P < 0. 01),thus modified BCR method was more suitable for the analysis of Cd fractions in loess amended by composted sludge.
It is of great significance for preventing and controlling Cd contaminated loess to determine Cd fractionation analysis method which is suitable for barren loess applied composted sludge in arid and semi-arid areas of northwest China. This paper researched on the fractionation of Cd in loess amended by composted sludge by Tessier and modified BCR sequential extraction procedures respectively. With application of composted sludge,the Cd stress in the loess increased,and the contents of FMO and OM extracted by Tessier and improved BCR also increased stably compared with the control group,while RES showed no remarkable change and Cd fraction re-distribution showed no stable mineralization to RES. AC was the main Cd fraction in loess amended by composted sludge by Tessier sequential extraction. While for modified BCR sequential extraction,with the increase of Cd stress on loess amended by composted sludge,the AC gradually became the dominant fraction. The content and distribution of Cd fractions extracted by modified BCR were more significant,the correlation coefficient of bioavailability was larger,and the fitting result of bioavailability was better( P < 0. 01),thus modified BCR method was more suitable for the analysis of Cd fractions in loess amended by composted sludge.
引文
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[19]杨洪英,朱长亮,蒋欢杰,等.某冶炼厂污染土壤中铜的赋存形态及生物有效性研究[J].东北大学学报(自然科学版),2007,28(7):1006-1008.
[20] Ma X Y,Zuo H,Tian M J,et al. Assessment of heavy metals contamination in sediments from three adjacent regions of the Yellow River using metal chemical fractions and multivariate analysis techniques[J]. Chemosphere,2016,144(3):264-272.
[21]王国莉,陈孟君,范红英,等.四种土壤重金属形态分析方法的对比研究[J].浙江农业学报,2015,27(11):1977-1983.
[22]邓晓霞,米艳华,黎其万,等.利用改进的BCR法和Tessier法提取稻田土壤中Pb、Cd的对比研究[J].江西农业学报,2016,28(9):64-68.
[23] Alborés A F,Cid B P,Gómez E F,et al. Comparison between sequential extraction procedures and single extractions for metal partitioning in sewage sludge samples[J]. Analyst,2000,125(7):1353-1357.
[24]关天霞,何红波,张旭东,等.土壤中重金属元素形态分析方法及形态分布的影响因素[J].土壤通报,2011,42(2):503-512.
[25]王梓函,董泽琴,陈凤,等.土壤重金属铅镉形态和有效态的提取方法研究[J].环境污染与防治,2016(3):1-7.
[2]苟剑锋,高冬香,曾正中,等.污泥施入黄土后重金属Cu、Zn、Cd的淋滤迁移[J].环境工程学报,2015,9(6):3002-3008.
[3]曾正中,李国梁,苟剑锋,等.污泥改性黄土合适配比及作物盆栽实验[J].环境工程学报,2016,10(8):4473-4479.
[4]刘敬勇,孙水裕,许燕滨,等.广州城市污泥中重金属的特性及潜在生态风险[C]∥中国矿物岩石地球化学学会学术年会,2009:371.
[5]王强强.土著微生物处理含镉沉渣新技术研究[D].湘潭:湘潭大学,2011:1.
[6]陈怀满.环境土壤学[M]. 2版.北京:科学出版社,2010:187.
[7] Wan X,Dong H C,Feng L,et al. Comparison of three sequential extraction procedures for arsenic fractionation in highly polluted sites[J]. Chemosphere,2017,178:402-410.
[8] Hao Z,Wu C,Wang J,et al. The effect of simulated acid rain on the stabilization of cadmium in contaminated agricultural soils treated with stabilizing agents[J]. Environmental Science&Pollution Research International,2018,25(8):1-10.
[9]刘丹丹,刘菲,缪德仁.土壤重金属连续提取方法的优化[J].现代地质,2015,29(2):390-396.
[10]刘育红,郑伟.西宁市不同功能城区土壤重金属镉含量及形态研究[J].宁夏农林科技,2011,52(5):47-48.
[11]王学锋,马鑫.新乡小冀工业区周边土壤重金属污染评价与形态分析[J].干旱区资源与环境,2013,27(8):148-152.
[12] Jin C,Nan Z R,Wang H C,et al. Plant growth and heavy metal bioavailability changes in a loess subsoil amended with municipal sludge compost[J]. Journal of Soils&Sediments,2017:1-13.
[13]雷勋杰,曾正中,苟剑锋,等.污泥堆肥化过程中重金属Cu、Zn、Cd的生物有效性研究[J].环境工程,2014,32(6):109-113.
[14]王国莉,陈孟君,范红英,等.四种土壤重金属形态分析方法的对比研究[J].浙江农业学报,2015,27(11):1977-1983.
[15] Kang X M,Song J M,Yuan H M,et al. Speciation of heavy metals in different grain sizes of Jiaozhou Bay sediments:bioavailability,ecological risk assessment and source analysis on a centennial timescale[J]. Ecotoxicology&Environmental Safety,2017,143:296-306.
[16] Tessier A,Campbell P G C,Bisson M. Sequential extraction procedure for the speciation of particulate trace metals[J].Analytical Chemistry,1979,51(7):844-851.
[17] Luo Y M,Christie P. Choice of Extraction Technique for Soil Reducible Trace Metals Determines the Subsequent Oxidisable Metal Fraction in Sequential Extraction Schemes[J]. International Journal of Environmental Analytical Chemistry,1998,72(1):59-75.
[18] Davidson C M,Ferreira P C S,Ure A M. Some sources of variability in application of the three-stage sequential extraction procedure recommended by BCR to industrially-contaminated soil[J]. Fresenius Journal of Analytical Chemistry,1999,363(5/6):446-451.
[19]杨洪英,朱长亮,蒋欢杰,等.某冶炼厂污染土壤中铜的赋存形态及生物有效性研究[J].东北大学学报(自然科学版),2007,28(7):1006-1008.
[20] Ma X Y,Zuo H,Tian M J,et al. Assessment of heavy metals contamination in sediments from three adjacent regions of the Yellow River using metal chemical fractions and multivariate analysis techniques[J]. Chemosphere,2016,144(3):264-272.
[21]王国莉,陈孟君,范红英,等.四种土壤重金属形态分析方法的对比研究[J].浙江农业学报,2015,27(11):1977-1983.
[22]邓晓霞,米艳华,黎其万,等.利用改进的BCR法和Tessier法提取稻田土壤中Pb、Cd的对比研究[J].江西农业学报,2016,28(9):64-68.
[23] Alborés A F,Cid B P,Gómez E F,et al. Comparison between sequential extraction procedures and single extractions for metal partitioning in sewage sludge samples[J]. Analyst,2000,125(7):1353-1357.
[24]关天霞,何红波,张旭东,等.土壤中重金属元素形态分析方法及形态分布的影响因素[J].土壤通报,2011,42(2):503-512.
[25]王梓函,董泽琴,陈凤,等.土壤重金属铅镉形态和有效态的提取方法研究[J].环境污染与防治,2016(3):1-7.
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