Transfer characteristics and ecological risk assessment of heavy metals in soil-rice system in typical acid magmatic rock area with low geochemical background of Guangxi
-
摘要: 为了解地质低背景区农田土壤-作物系统中重金属的富集及迁移特征，采集了广西钦北区878 km2酸性火成岩出露区的30套水稻籽实及根系土样品作为研究对象，研究酸性火成岩地质低背景区土壤和水稻中重金属（As、Cd、Cr、Cu、Hg、Ni、Pb和Zn）分布特征、土壤Cd等重金属的赋存状态及其生物有效性。结果显示：研究区土壤呈酸性，pH值为4.66~5.36；Cd、As、Cr等重金属元素含量较低，均低于或远低于我国土壤环境质量标准规定的风险筛选值，水稻籽实中As、Cr、Hg和Pb均未超标，但Cd超标率为16.7%。土壤中As和Pb主要以残渣态存在，Hg主要以残渣态和强有机结合态存在，而Cd的生物富集系数和生物有效性最高，水溶态、离子交换态和碳酸盐结合态的比例总和为32%。水稻籽实吸收Cd等重金属主要与土壤pH值、Fe、Mn和土壤质地有关。酸性火成岩地质低背景区农田酸性、强酸性土壤Cd等重金属元素含量低，但生物有效性高，其生态风险值得关注。Abstract: In order to understand the transfer characteristics of heavy metals in farmland soil-crop system with low geochemical background, 30 paired rice grain and soil samples from 878 km2 acid magmatic rock area outcropped in Qinbei district of Guangxi were collected. Specifically, the distribution of heavy metals (As, Cd, Cr, Cu, Hg, Ni, Pb and Zn) in the soils and rice grains, the fractionations and influencing factors on bioavailability of Cd and other metals in the soils were studied. The results showed that soil pH values in studied area ranged from 4.66 to 5.36, which was acidic. The concentrations of Cd, As, Cr and other heavy metals were all lower than or far below the risk screening values specified in Chinese soil environmental quality standard (GB15618-2018). In rice grains from the studied area, As, Cr, Hg and Pb did not exceed the standard; but for Cd an exceedance rate of 16.7% was observed. In soils, As and Pb mainly existed in the residual fraction, Hg mainly existed in the residual and strong organic binding fractions. Moreover, the bioconcentration factor (BCF) and bioavailability of Cd were the highest with 32% being the water soluble, ion exchangeable and carbonate binding fractions. The transfer of heavy metals from soil to rice grains is mainly related to soil pH value, Fe, Mn, and soil texture. Therefore, the ecological risk of heavy metals in farmland in acid magmatic rock area with low geochemical background is worthy of attention due to its acidic/strongly acidic soil with heavy metals being of low levels but high bioavailability.
-
Key words:
- acid magmatic rock area /
- low geochemical background /
- soil /
- rice grain /
- heavy metals /
- ecological risk
-
-
[1] 范鹏. 重金属对人体健康的影响[J]. 解放军健康, 2004(1):40.
FAN P. Effects of heavy metals on human health[J]. PLA Health, 2004(1):40.
[2] 李法云, 胡成, 张营, 等. 沈阳市街道灰尘中重金属的环境影响与健康风险评价[J]. 气象与环境学报, 2010, 26(6):59-64.
LI F Y, HU C, ZHANG Y, et al. Environmental impact and health risk assessment of heavy metals in street dust in Shenyang, Liaoning Province[J]. Journal of Meteorology and Environment, 2010, 26(6):59-64.
[3] LARBI N, MEROUANI D R, AGUEDAL H, et al. Removal of heavy metals Cd(Ⅱ) and Al(Ⅲ) from aqueous solutions by an eco-friendly biosorbent[J]. Key Engineering Materials, 2019, 800:181-186.
[4] 吴迪, 杨秀珍, 李存雄, 等. 贵州典型铅锌矿区水稻土壤和水稻中重金属含量及健康风险评价[J]. 农业环境科学学报, 2013, 32(10):1992-1998.
WU D, YANG X Z, LI C X, et al. Concentrations and health risk assessments of heavy metals in soil and rice in zinc-lead mining area in Guizhou Province, China[J]. Journal of Agro-Environment Science, 2013, 32(10):1992-1998.
[5] 李朋飞, 杜国强, 刘超, 等. 安徽淮北平原农田土壤酸碱度特征及酸化趋势研究[J]. 华东地质, 2019, 40(3):234-240.
LI P F, DU G Q, LIU C, et al. Acidity and basicity characteristics and acidification trend of the farmland soil in Huaibei Plain, Anhui Province[J]. East China Geology, 2019, 40(3):234-240.
[6] 樊霆, 叶文玲, 陈海燕, 等. 农田土壤重金属污染状况及修复技术研究[J]. 生态环境学报, 2013, 22(10):1727-1736.
FAN T, YE W L, CHEN H Y, et al. Review on contamination and remediation technology of heavy metal in argricultural soil[J]. Ecology and Environmental Sciences, 2013, 22(10):1727-1736.
[7] 叶晟, 赵静. 矿区土壤重金属污染生态修复综述[J]. 区域治理, 2020(3):120-122.
YE S, ZHAO J. A review of soil heavy metal pollution and eco-remediation in mining area[J]. Regional Govenance, 2020(3):120-122.
[8] AHEMAD M. Remediation of metalliferous soils through the heavy metal resistant plant growth promoting bacteria:Paradigms and prospects[J]. Arabian Journal of Chemistry, 2019, 12(7):1365-1377.
[9] 杨琼, 杨忠芳, 张起钻, 等. 中国广西岩溶地质高背景区土壤-水稻系统Cd等重金属生态风险评价[J]. 中国科学:地球科学, 2021, 51(8):1317-1331. YANG Q, YANG Z F, ZHANG Q Z, et al. Ecological risk assessment of Cd and other heavy metals in soil-rice system in the karst areas with high geochemical background of Guangxi, China[J]. Science China:Earth Sciences, 2021, 64(7):1126-1139.
[10] WEN Y B, LI W, YANG Z F, et al. Enrichment and source identification of Cd and other heavy metals in soils with high geochemical background in the karst region, Southwestern China[J]. Chemosphere, 2020, 245:125620.
[11] 赵万伏, 宋垠先, 管冬兴, 等. 典型黑色岩系分布区土壤重金属污染与生物有效性研究[J]. 农业环境科学学报, 2018, 37(7):1332-1341.
ZHAO W F, SONG Y X, GUAN D X, et al. Pollution status and bioavailability of heavy metals in soils of a typical black shale area[J]. Journal of Agro-Environment Science, 2018, 37(7):1332-1341.
[12] DUAN Y R, YANG Z F, YU T, et al. Geogenic cadmium pollution in multi-medians caused by black shales in Luzhai, Guangxi[J]. Environmental Pollution, 2020, 260:113905.
[13] WANG H X, LI X M, CHEN Y, et al. Geochemical behavior and potential health risk of heavy metals in basalt-derived agricultural soil and crops:A case study from Xuyi County, eastern China[J]. Science of The Total Environment, 2020, 729:139058.
[14] 洪大卫, 王涛, 童英. 中国花岗岩概述[J]. 地质论评, 2007, 53(增刊1):9-16.
HONG D W, WANG T, TONG Y. An outline about granitoids in China[J]. Geological Review, 2007, 53(S1):9-16.
[15] 郑国东. 广西北部湾地区表层土壤重金属分布特征及其影响因素研究[D]. 北京:中国地质大学(北京), 2016.
ZHENG G D. Factors influencing the distribution and accumulation of heavy metals in topsoil across Beibu Gulf of Guangxi[D]. Beijing:China University of Geosciences, 2016.
[16] 郑国东, 覃建勋, 付伟, 等. 广西北部湾地区表层土壤As分布特征及其影响因素[J]. 吉林大学学报:地球科学版, 2018, 48(1):181-192.
ZHENG G D, QIN J X, FU W, et al. Influencing factors on distribution and accumulation of arsenic in topsoil in Beibu Gulf of Guangxi[J]. Journal of Jilin University:Earth Science Edition, 2018, 48(1):181-192.
[17] 张朝生, 章申, 王立军, 等. 若干典型岩性区域沉积物金属元素地球化学特征比较研究[J]. 环境科学学报, 1998, 18(2):172-176.
ZHANG C S, ZHANG S, WANG L J, et al. Comparison of geochemistry of metals in sediments from some typical rock areas[J]. Acta Scientiae Circumstantiae, 1998, 18(2):172-176.
[18] 王海荣, 侯青叶, 杨忠芳, 等. 广东省典型花岗岩成土剖面元素垂向分布特征[J]. 中国地质, 2013, 40(2):619-628.
WANG H R, HOU Q Y, YANG Z F, et al. Vertical distribution of some elements in typical weathering-soil profiles of granite in Guangdong Province[J]. Geology in China, 2013, 40(2):619-628.
[19] 卢胜, 张志毅, 黄丽, 等. 花岗岩和片麻岩发育土壤性状的水平地带性分异[J]. 土壤通报, 2015, 46(2):272-279.
LU S, ZHANG Z Y, HUANG L, et al. Horizontal distinction of granite and gneiss derived soils[J]. Chinese Journal of Soil Science, 2015, 46(2):272-279.
[20] 夏学齐, 季峻峰, 杨忠芳, 等. 母岩类型对土壤和沉积物镉背景的控制:以贵州为例[J/OL].(2021-12-05)[2022-01-18].https://doi.org/10.13745/j.esf.sf.2021.11.2. XIA X Q, JI J F, YANG Z F, et al. Controlling of parent rock type on cadmium background in soil and sediment:an example from Guizhou Province[J/OL]. (2021-12-05)[2022-01-18]. https://doi.org/10.13745/j.esf.sf.2021.11.2.
[21] COBELO-GARCÍA A, PREGO R. Heavy metal sedimentary record in a Galician Ria (NW Spain):Background values and recent contamination[J]. Marine Pollution Bulletin, 2003, 46(10):1253-1262.
[22] 赵凯丽, 王伯仁, 徐明岗, 等. 我国南方不同母质土壤pH剖面特征及酸化因素分析[J]. 植物营养与肥料学报, 2019, 25(8):1308-1315.
ZHAO K L, WANG B R, XU M G, et al. Changes in pH with depths of soils derived from different parent materials and analysis of acidification in Southern China[J]. Journal of Plant Nutrition and Fertilizers, 2019, 25(8):1308-1315.
[23] 中华人民共和国国土资源部. DZ/T 0295-2016土地质量地球化学评价规范[S]. 北京:地质出版社, 2016:1-59.
MLR (Ministry of Land and Resources of the People's Republic of China). DZ/T 0295-2016 Specification of land quality geochemical assessment[S]. Beijing:Geological Publishing House, 2016:1-59.
[24] 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.
[25] 中国地质调查局. DD 2005-03生态地球化学评价样品分析技术要求(试行)[S]. 北京:地质出版社, 2005:1-33.
China Geological Survey. DD 2005-03 Geological Survey Technical Standard-The Technical Requirements for Eco-Geochemical Analysis of Sample[S]. Beijing:Geological Publishing House, 2005:1-33.
[26] DING C F, MA Y B, LI X G,et al. Derivation of soil thresholds for lead applying species sensitivity distribution:A case study for root vegetables[J]. Journal of Hazardous Materials, 2016, 303:21-27.
[27] 侯青叶, 杨忠芳, 杨晓燕, 等. 成都平原区水稻土成土剖面Cd形态分布特征及影响因素研究[J]. 地学前缘, 2008, 15(5):36-46.
HOU Q Y, YANG Z F, YANG X Y, et al. Study of distribution of geochemical speciation of cadmium and factors controlling the distribution in paddy soil profiles, Chengdu Plain, Southwest China[J]. Earth Science Frontiers, 2008, 15(5):36-46.
[28] 侯青叶, 杨忠芳, 余涛, 等. 中国土壤地球化学参数[M]. 北京:地质出版社, 2020:16-17.
HOU Q Y, YANG Z F, YU T, et al. Soil geochemical dataset of China[M]. Beijing:Geological Publishing House, 2020:16-17.
[29] 中国生态环境部, 国家市场监督管理总局. GB 15618-2018土壤环境质量农用地土壤污染风险管控标准(试行)[S]. 北京:中国标准出版社, 2018:1-4.
Ministry of Ecology and Environment of the People's Republic of China, State Administration for Market Regulation. GB 15618-2018 Soil Environment Quality-Risk control standard for soil contamination of agricultural land[S]. Beijing:Standards Press of China, 2018:1-4.
[30] 唐豆豆, 袁旭音, 汪宜敏, 等. 地质高背景农田土壤中水稻对重金属的富集特征及风险预测[J]. 农业环境科学学报, 2018, 37(1):18-26.
TANG D D, YUAN X Y, WANG Y M, et al. Enrichment characteristics and risk prediction of heavy metals for rice grains growing in paddy soils with a high geological background[J]. Journal of Agro-Environment Science, 2018, 37(1):18-26.
[31] 刘意章, 肖唐付, 熊燕, 等. 西南高镉地质背景区农田土壤与农作物的重金属富集特征[J]. 环境科学, 2019, 40(6):2877-2884.
LIU Y Z, XIAO T F, XIONG Y, et al. Accumulation of heavy metals in agricultural soils and crops from an area with a high geochemical background of cadmium, Southwestern China[J]. Environmental Science, 2019, 40(6):2877-2884.
[32] 杨忠芳, 季峻峰, 刘旭, 等. 广西土壤Se、Ge、Cd等元素异常成因与生态效应研究成果报告[R]. 2021. YANG Z F, JI J F, LIU X, et al. Study on the genesis and ecological effect of Se, Ge and Cd in soil of Guangxi, China[R]. 2021.
[33] 中国卫生和计划生育委员会, 国家食品药品监督管理总局. GB 2762-2017食品安全国家标准:食品中污染物限量[S]. 北京:中国标准出版社, 2017:1-17.
National Health and Family Planning Commission of the People's Republic of China, National Medical Products Administration. GB 2762-2017 Foodstuff Safety National Criteria-Maximum Levels for Contaminants in Foodstuff[S]. Beijing:Standards Press of China, 2017:1-17.
[34] 陈京都, 戴其根, 许学宏, 等. 江苏省典型区农田土壤及小麦中重金属含量与评价[J]. 生态学报, 2012, 32(11):3487-3496.
CHEN J D, DAI QI G, XU X H, et al. Heavy metal contents and evaluation of farmland soil and wheat in typical area of Jiangsu Province[J]. Acta Ecologica Sinica, 2012, 32(11):3487-3496.
[35] 赵辛金, 吴天生, 钟晓宇, 等. 广西典型岩溶区重金属高背景区农田土壤生态风险综合评价[J]. 江苏农业科学, 2020, 48(22):252-261.
ZHAO X J, WU T S, ZHONG X Y, et al. Comprehensive evaluation of ecological risk of farmland soil in typical karst area of Guangxi area with high heavy metal background[J]. Jiangsu Agricultural Sciences, 2020, 48(22):252-261.
[36] GU Q B, YU T, YANG Z F, et al. Prediction and risk assessment of five heavy metals in maize and peanut:A case study of Guangxi, China[J]. Environmental Toxicology and Pharmacology, 2019, 70:103199.
[37] 李非里, 刘丛强, 宋照亮. 土壤中重金属形态的化学分析综述[J]. 中国环境监测, 2005, 21(4):21-27.
LI F L, LIU C Q, SONG Z L. A review of fractionation of heavy metals in soils[J]. Environmental Monitoring in China, 2005, 21(4):21-27.
[38] GOH K H, LIM T T. Geochemistry of inorganic arsenic and selenium in a tropical soil:Effect of reaction time, pH, and competitive anions on arsenic and selenium adsorption[J]. Chemosphere, 2004, 55(6):849-859.
[39] 王砚, 谭文峰, 冯雄汉, 等. 水钠锰矿对几种重金属离子的吸附及其与锰氧化度和吸附位点的关系[J]. 环境科学, 2011, 32(10):3128-3136.
WANG Y, TAN W F, FENG X H, et al. Adsorption of heavy metals on the surface of birnessite relationship with its Mn average oxidation state and adsorption sites[J]. Environmental Science, 2011, 32(10):3128-3136.
[40] WEERASOORIYA R, WIJESEKARA H K D K, BANDARA A. Surface complexation modeling of cadmium adsorption on gibbsite[J]. Colloids and Surfaces A:Physicochemical and Engineering Aspects, 2002, 207(1/3):13-24.
[41] SWEDLUND P J, WEBSTER J G, MISKELLY G M. Goethite adsorption of Cu(Ⅱ), Pb(Ⅱ), Cd(Ⅱ), and Zn(Ⅱ) in the presence of sulfate:Properties of the ternary complex[J]. Geochimica et Cosmochimica Acta, 2009, 73(6):1548-1562.
[42] 王存龙, 郑伟军, 王红晋, 等. 山东烟台环境介质中重金属元素富集特征及与酸化土壤的关系[J]. 岩矿测试, 2012, 31(2):361-369.
WANG C L, ZHENG W J, WANG H J, et al. The relationship between heavy metals enrichment characteristics and soil acidification for environmental media in Yantai of Shandong Province[J]. Rock and Mineral Analysis, 2012, 31(2):361-369.
[43] WANG C, LI W, YANG Z F, et al. An invisible soil acidification:Critical role of soil carbonate and its impact on heavy metal bioavailability[J]. Scientific Reports, 2015, 5:12735.
[44] 陈子扬, 孙孝龙. 土壤中有机质与重金属关系的研究进展[J]. 环境与发展, 2017, 29(8):141-142.
CHEN Z Y, SUN X L. Research progress on the relationship between organic matter and heavy metals in soils[J]. Environment and Development, 2017, 29(8):141-142.
[45] CHENG H, WANG M Y, WONG M H, et al. Does radial oxygen loss and iron plaque formation on roots alter Cd and Pb uptake and distribution in rice plant tissues?[J]. Plant and Soil, 2014, 375:137-148.
[46] SASAKI A, YAMAJI N, YOKOSHO K, et al. Nramp5 is a major transporter responsible for manganese and cadmium uptake in rice[J]. The Plant Cell, 2012, 24(5):2155-2167.
[47] 邓林, 李柱, 吴龙华, 等. 水分及干燥过程对土壤重金属有效性的影响[J]. 土壤, 2014, 46(6):1045-1051.
DENG L, LI Z, WU L H, et al. Influence of moisture and drying process on soil heavy metal availability[J]. Soils, 2014, 46(6):1045-1051.
[48] 朱纯, 熊咏梅, 贺漫媚, 等. 广州绿地土壤理化特性及其相关性[J]. 生态环境学报, 2010, 19(8):1868-1871.
ZHU C, XIONG Y M, HE M M, et al. Soil physico-chemical properties and their correlations in a greenbelt in Guangzhou[J]. Ecology and Environmental Sciences, 2010, 19(8):1868-1871.
[49] 宋志廷, 赵玉杰, 周其文, 等. 不同土壤孔隙度对DGT提取Cd有效态含量的影响研究[J]. 中国农学通报, 2016, 32(12):139-144.
SONG Z T, ZHAO Y J, ZHOU Q W, et al. Effect of soil porosity on available Cd content extracted by DGT[J]. Chinese Agricultural Science Bulletin, 2016, 32(12):139-144.
[50] 王小纯, 马新明, 郑谨, 等. 粉煤灰施入砂姜黑土对麦田重金属元素分布影响的研究[J]. 土壤通报, 2002, 33(3):226-229.
WANG X C, MA X M, ZHENG J, et al. The accumulation and distribution of heavy metal in various organs of wheat after applying coal fly ash to Sajiang black soil[J]. Chinese Journal of Soil Science, 2002, 33(3):226-229.
-
计量
- 文章访问数: 796
- PDF下载数: 40
- 施引文献: 0
下载: