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1.
本文对石家庄市大气降尘重金属含量水平进行了研究,从2007年11月起连续收集一年的大气降尘样品,分析了As、Cd、Hg、Pb、Cr、Cu、Zn、Ni、Mo、Mn、Al2O3、K2O等12项。结果表明,与土壤背景值相比,石家庄市大气降尘中除Al2O3外的重金属含量总体明显升高。采用相关分析和主成分分析,对降尘重金属元素来源进行解析,认为有3种主要来源:一是Pb、Cr、As、Hg、Mo、Cd、Mn与燃煤活动、道路交通有关;二是Ni、Cu、Zn除与燃煤活动有关外,还与工矿企业废气排放有关;三是Al2O3主要与土壤颗粒物有关(自然来源)。以Al作为参考元素计算重金属的富集因子表明,受工业活动影响的Cd、Hg、Zn具有较大的富集因子,大气降尘中的重金属含量高值区与工业区域的分布相吻合。 相似文献
2.
【研究目的】土壤-水体-大气降尘中Cd、As等微量元素成因来源、富集规律为环境地质研究焦点,开展惠水土壤-灌溉水-雨水-大气降尘系统中Cd、As等微量元素迁移与富集的定量研究,对该地区农业生产和农产品种植具有重要意义。【研究方法】以贵州省惠水县表层土壤、灌溉水、雨水和大气降尘样品为研究对象,分析样品中的Cd、As微量元素地球化学特征。【研究结果】结果表明：研究区以酸性土为主,147件表层土壤样品中元素Cd与As、Cr、Hg、Mn、Ni、Pb、Zn、pH呈正相关关系,与Cu、Se呈负相关关系;34件灌溉水样品中含量主要为As、B、F-、Se、Zn,灌溉水重金属元素单因子污染指数和内梅罗综合指数等级为1级,属清洁范围,表明灌溉水水质均达标;5件雨水和大气降尘样品中,大气降尘主要为As、Cd、Cr、Hg、Pb,雨水中主要为As、B、Cd、Cr6+、F-、Ge、Hg、Pb、Se、Zn。【结论】评价结果显示：土壤单因子污染指数Cd指数最高,内梅罗综合污染指数大小为羡塘镇红旗村>芦山镇羊马村>涟江街道大坡村>好花红... 相似文献
3.
TCLP法评价泉州市大气降尘重金属的生态环境风险 总被引：3，自引：0，他引：3
对泉州市不同功能区大气降尘中的重金属(Cu、Zn、Pb、Cd、Cr、As、Fe、Mn、Co、Ni、V)含量进行了分析测定,采用由美国环保署(USEPA)提出并被广泛推荐采用的TCLP法对泉州市不同功能区大气降尘中的重金属元素(Cu、Zn、Pb、Cd、Cr)的生态环境风险进行评价。以TCLP法提取的泉州市大气降尘重金属Cu、Cd、Zn、Pb、Cr、As、Fe、Mn、Co、Ni和V含量分别在2.592～63.20、0.084～2.978、9.276～3141、0.147～345.0、0.628～9.696、0.019-5.152、5.037-248.9、55.00-1261、0.040-63.56、0.735-37.43和0.020-24.07 mg/kg之间。根据TCLP法测定项目的法定阈值,泉州市大气降尘不同程度地受到Cu、Zn、Pb、Cd、Cr的污染,其中以Pb、Zn污染最为严重,其次为Cu、Cd、Cr。相关性分析结果显示,Fe、Mn、Ni、Cr、V的TCLP法提取量受样品pH值的显著影响;Pb、Cd、Mn、Co、Ni、As提取量除了受金属本身的总量影响外,还受到其它元素总量和TCLP提取量的影响。主成分分析结果表明,交通尾气尘、燃油尘、装饰材料尘、地面土壤尘、工业粉尘、建筑尘和燃煤烟尘等是泉州市大气降尘的主要来源,占总贡献率的86.01%。 相似文献
4.
内江市双桥乡土壤重金属含量及风险评价 总被引：3，自引：0，他引：3
以四川省内江市双桥乡为研究区域,调查分析各类土壤中重金属（Cu、Pb、Zn、Cd、Cr、As、Hg、Ni）含量情况。采用单因子污染指数、内梅罗综合污染指数和富集因子评价方法,对土壤重金属污染状况进行评价。研究结果表明,该地区Cd、Cr、Cu、Ni、Pb、Zn元素平均含量高于成都经济区、四川省、中国土壤背景值,有一定程度的Cd、Cr、Cu、Ni、Pb、Zn富集,Hg元素有个别样点含量偏高,并且单因子重金属的污染程度依次为：Cd〉Ni〉Zn〉Cu〉Cr〉Pb〉As〉Hg,Cd在绝大部份区域存在轻微污染,由内梅罗污染指数和富集因子评价得出区域综合污染程度为轻度。 相似文献
5.
徐州城市表层土壤中重金属环境风险测度与源解析 总被引：43，自引：2，他引：43
研究了徐州城市表层土壤的21个样品中重金属元素富集特征,结果表明,与我国土壤元素的背景值(算术平均值)相比,表层土壤中Zn、Cd、As、Hg、Sb、Sn和Ag等元素富集程度高;Se、Sc、Ba、Bi、Pb、Cu、Ni、Cr、Mn、Mo、Be、Ga和Co等元素的富集程度较低。不同城市表层土壤中重金属元素有着不同的来源,统计分析结果表明,研究区表层土壤样品中重金属元素可分成4种类别:“自然因子”类别元素(Ti、Ga、Li、V、Co、Mn、Be和Pt);“交通因子”类别元素(Ag、Se、Sc、Pb、Cu、Zn、Cd、Br、S、Mo和Au);“燃煤因子”类别元素B(i、Cr、Hg、As、Sb和Pd)和混合源类别元素(Sn和Ba)。环境风险指数的计算结果表明,表层土壤中重金属污染具有较大的环境风险,其中属于中等环境风险级别以上的样品占近40%。 相似文献
6.
山东安丘地区土壤-小麦系统重金属等元素间的相互作用 总被引：1，自引：0，他引：1
《现代地质》2020,(5)
为了研究土壤-小麦系统重金属等元素间的相互作用,通过相关分析,探讨了安丘地区40件小麦籽实及其根系土中重金属元素间的相互关系。研究发现:(1)小麦籽实Cd、Hg、Pb、As、Ni、Cu、Zn富集系数与土壤pH、CEC、黏粒含量呈负相关,Cr富集系数与pH呈正相关;(2)小麦籽实重金属等元素富集系数间多数呈正相关;(3)小麦籽实Pb、Cu含量分别与土壤As、Pb含量呈正相关,籽实Cu、Zn含量分别与土壤Cd、Pb含量呈正相关。籽实除Cr含量与土壤Mg含量呈显著正相关外,籽实中其他重金属元素含量与土壤元素Ca、Mg含量关系不显著。小麦籽实中Cd、Pb、As等重金属元素含量与土壤中Mn、Mo、F等微量元素含量少数呈显著-极显著正相关;(4)小麦籽实中Cd、Hg、Pb、As等重金属元素含量与籽实中Ca、Mg、Mn、Mo等其他元素含量之间多数呈显著正相关。这些研究结果表明,土壤-小麦系统重金属元素之间、重金属元素与其他元素之间存在协同或拮抗作用,但具体机制尚需要进一步研究。 相似文献
7.
浙江省北部地区调查研究表明,受成土母质来源、土壤类型及其理化性质等因素的影响,土壤元素全量、有效量及其有效度表现为:1)低山丘陵岗地土壤中As,Cd,Mo,Pb和Se全量较高,As,Cd,Fe,Pb,Se和Zn有效量较高;而山前平原区土壤中Hg,Pb和Zn元素全量较高,由地表向深部的下降递度较小,显示为原始沉积成因特点。2)中酸性、富含有机质的红壤和水稻土中As,Cd,Cu,Fe,Mn,Pb,Se,Zn等元素有效度较高,水稻土Hg有效度最低;弱碱性或碱性、贫有机质的潮土和滨海盐砂土中As,Cd,Cu,Fe,Mn,Pb,Se,Zn等元素有效量较低,但B有效量及有效度均较高。3)统计分析表明,土壤中Mn,Cu,Zn,Mo,Cd,Pb,Se等元素全量与有效量间具显著正相关性,表明全量是有效量的重要影响控制因素;有机质含量与Fe,Cu,Zn,Cd,As和Pb有效度间为显著正相关,说明有机质较高有利于土壤元素活化;Fe,Cu,Zn,Cd,As,Pb和Se有效度与pH值为显著负相关,表明土壤酸性增强(酸化)会增加这类元素的生物有效性。 相似文献
8.
土壤重金属含量是影响黄芩产量和质量的重要因素。选取承德市中部金沟屯和五道岭两处黄芩种植示范区为研究区，采集表层土壤样品355件，黄芩样品30件，重金属形态样品15件。在分析土壤Mn、Zn、Cu、Cr、Cd、As、Pb、Ni、Hg、V、Co、Sb和土壤有机质含量（SOM）及pH值，黄芩Zn、Cu、Cr、Co、Cd、Pb、Ni、Hg和As含量基础上，采用描述性统计、地累积指数、主成分和RDA分析、重金属生物富集系数、生物活性系数和迁移系数等方法论述了土壤-黄芩系统重金属生物有效性及迁移累积特征。结果表明:金沟屯和五道岭区土壤各重金属累积程度总体属无-中度累积水平。五道岭Cu和Hg累积程度高于金沟屯区，其它元素累积程度低于金沟屯区。五道岭区表层土壤Cr、Cu和Cd含量超标率分别为2.82%、1.69%和1.13%；金沟屯区土壤Cd、Cr和Ni，五道岭区土壤Zn和Hg含量超标率均为0.56%。五道岭区黄芩Cu元素含量高于金沟屯区，Co和Cu元素生物富集强度高于金沟屯区，其它元素含量和生物富集强度则均低于金沟屯区。土壤Cd和Hg元素生物活性系数相对最高，Ni、Zn和Pb元素次之，Cu、Cr和As生物活性系数相对较低。金沟屯区根系土具有较低的pH值和较高的SOM含量，区内黄芩根部As、Cd、Cr、Ni、Zn和Pb元素BCF平均值高于五道岭区，Cu元素富集强度低于五道岭区。土壤重金属生物有效性和黄芩重金属生物富集强度受土壤pH和SOM含量影响，其中Cd和Cu元素受SOM含量影响最为明显。 相似文献
9.
基于地统计学和GIS相结合的方法，对承德全域表层土壤重金属As、Cd、Cr、Cu、Hg、Ni、Pb、Zn、微量元素Se正态分布特征、主导分布趋势及相互作用规律进行了分析，确定了不同元素最适宜的地统计插值模型并厘定出其空间分布规律。结果表明:As、Cd、Cr、Cu、Hg、Ni、Pb、Zn的质量含量平均值分别为8.28，0.200，60.85，24.37，0.034，27.76，26.65，77.10 mg/kg，Cd、Cu、Hg和Pb变异系数分别为385%、143%、350%、118%，分异性强。Zn含量均值受土壤类型影响显著，Cr、Cu、Ni含量均值则受土地利用类型影响显著。经过不同趋势阶数元素插值误差的综合对比，确定As、Cr、Pb、Zn、Ni、Se适宜选择无趋势参数，Hg和Cu适宜选择一阶趋势参数，而Cd适宜选择二阶趋势参数。As的理论模型为指数模型，主要受到结构性因素的影响；Cd、Cr、Cu、Hg、Ni、Pb、Zn、Se的理论模型为线性模型，主要受到随机性因素的影响。通过普通克里格插值图可见区内9种元素具有北低南高的特点，中部地区形成了一条较宽的Pb高值带，与Cd相似。按照含量分布特点，土壤中Cr和Ni、Cu和Hg、Zn和Pb、Se和Cd之间的高值空间展布区具有相似性且来源相同，仅As具有个性，分析结果与传统统计学结果数据保持部分一致性。 相似文献
10.
《物探与化探》2016,(1)
为查明济南市近地表大气降尘中元素的含量特征及污染来源,评价环境质量,在济南市城区范围内采集400件大气降尘样品。分析结果表明:大气降尘中As、F、Ni的平均含量分别为9.5×10-6、512×10-6、26.0×10-6,略低于济南市城市土壤背景值;而Cd、Cr、Hg、Pb、Se、Zn、Ca O含量均值分别为0.33×10-6、101×10-6、191×10-9、38.0×10-6、0.79×10-6、119.0×10-6、13.31%,明显高于城市土壤背景值。相关分析和主成分分析结果说明,大气降尘中Cd、Pb、Zn、Se可能来源于燃煤,Cr、Ni来源于土壤粉尘,Ca O、As来源于建筑尘,F主要来源于汽车尾气排放,Hg则受燃煤、冶炼及交通等因素影响。大气降尘中重金属Cd、Pb、Zn、Cr、Ni、As、Hg地累积指数变化范围分别为-2.46~4.53、-1.81~2.75、-2.02~3.48、-2.38~3.48、-2.95~1.96、-3.45~2.58及-3.04~6.87,污染程度排序依次为HgCdZnPbCrAsNi。 相似文献
11.
Lan Wang Yaping Wang Wenzhao Zhang Chunxue Xu Ziyi An 《Environmental Earth Sciences》2014,71(3):1183-1193
The concentrations of heavy metals (Cr, Co, Ni, Cu, Zn, Pb, Cd, As, Hg, and Fe) in sediments of the Yangtze River, China, were investigated to evaluate levels of contamination and their potential sources. The lowest heavy metal concentrations were found in the source regions of the river basin. Relatively high concentrations of metals, except Cr, were found in the Sichuan Basin, and the highest concentrations were in the Xiangjiang and Shun’anhe rivers. All concentrations, except Ni, were higher than global averages. Principal component analysis and hierarchical cluster analysis showed that Zn, Pb, As, Hg, and Cd were derived mainly from the exploitation of various multi-metal minerals, industrial wastewater, and domestic sewage. Cu, Co, and Fe were derived mainly from natural weathering (erosion). Cr and Ni were derived mainly from agricultural activities, municipal and industrial wastewater. Sediment pollution was assessed using the geoaccumulation index (I geo) and enrichment factor (EF). Among the ten heavy metals assessed, Cd and Pb had the highest I geo values, followed by Cu, As, Zn, and Hg. The I geo values of Fe, Cr, Co, and Ni were <0 in all sediments. EF provided similar information to I geo: no enrichment was found for Cr, Co, and Ni. Cu, Zn, As, and Hg were relatively enriched at some sites while Cd and Pb showed significant enrichment. 相似文献
12.
Quantitative identification and source apportionment of anthropogenic heavy metals in marine sediment of Hong Kong 总被引：7，自引：0，他引：7
Based on ten heavy metals collected twice annually at 59 sites from 1998 to 2004, enrichment factors (EFs), principal component
analysis (PCA) and multivariate linear regression of absolute principal component scores (MLR-APCS) were used in identification
and source apportionment of the anthropogenic heavy metals in marine sediment. EFs with Fe as a normalizer and local background
as reference values was properly tested and suitable in Hong Kong, and Zn, Ni, Pb, Cu, Cd, Hg and Cr mainly originated from
anthropogenic sources, while Al, Mn and Fe were derived from rocks weathering. Rotated PCA and GIS mapping further identified
two types of anthropogenic sources and their impacted regions: (1) electronic industrial pollution, riparian runoff and vehicle
exhaust impacted the entire Victoria Harbour, inner Tolo Harbour, Eastern Buffer, inner Deep Bay and Cheung Chau; and (2)
discharges from textile factories and paint, influenced Tsuen Wan Bay and Kwun Tong typhoon shelter and Rambler Channel. In
addition, MLR-APCS was successfully introduced to quantitatively determine the source contributions with uncertainties almost
less than 8%: the first anthropogenic sources were responsible for 50.0, 45.1, 86.6, 78.9 and 87.5% of the Zn, Pb, Cu, Cd
and Hg, respectively, whereas 49.9% of the Ni and 58.4% of the Cr came from the second anthropogenic sources. 相似文献
13.
Selective chemical extraction of heavy metals in tailings and soils contaminated by mining activity: Environmental implications 总被引：1，自引：0，他引：1
Paulo J.C. Favas João Pratas M. Elisa P. Gomes V. Cala 《Journal of Geochemical Exploration》2011,111(3):160-171
Total concentrations of chemical elements in soils may not be enough to understand the mobility and bioavailability of the elements. It is important to characterise the degree of association of chemical elements in different physical and chemical phases of soil. Another geochemical characterisation methodology is to apply sequential selective chemical extraction techniques. A seven-step sequential extraction procedure was used to investigate the mobility and retention behaviour of Al, Fe, Mn, Cu, Zn, Pb, Cr, Co, Ni, Mo, Cd, Bi, Sn, W, Ag, As and U in specific physical–chemical and mineral phases in mine tailings and soils in the surroundings of the abandoned Ervedosa mine. The soil geochemical data show anomalies associated with mineralised veins or influenced by mining. Beyond the tailings, the highest recorded concentrations for most elements are in soils situated in mineralised areas or under the influence of tailings. The application of principal components analysis allowed recognition of (a) element associations according to their geochemical behaviour and (b) distinction between samples representing local geochemical background and samples representing contamination. Some metal cations (Mn, Cd, Cu, Zn, Co, Cr, Ni) showed important enrichment in the most mobilisable and bioavailable (i.e., water-soluble and exchangeable) fractions due likely to the acidic conditions in the area. In contrast, oxy-anions such as Mo and As showed lower mobility because of adsorption to Fe oxy-hydroxides. The residual fraction comprised largest proportions of Sn and Al and to a lesser extent Zn, Pb, Ni, Cr, Bi, W, and Ag, which are also present at low concentrations in the bioavailable fractions. The elements in secondary mineral phases (mainly Fe, Mn, Cu, Zn, Cd, Pb, W, Bi, Mo, Cr, Ni, Co, As and U) as well as in organic matter and sulphides are temporarily withheld, suggesting that they may be released to the environment by changes in physico-chemical conditions. 相似文献
14.
《International Journal of Coal Geology》2007,69(3):179-191
The concentration, distribution and modes of occurrence of trace elements in thirty coals, four floors and two roofs from Northern China were studied. The samples were collected from the major coalfields of Shanxi Province, Shaanxi Province, Inner Mongolian Autonomous Region, and Ningxia Hui Autonomous Region. The concentrations of seventeen potential hazardous trace elements, including Hg, As, Se, Pb, Cd, Br, Ni, Cr, Co, Mo, Mn, Be, Sb, Th, V, U, Zn, and five major elements P, Na, Fe, Al, and Ca in coals were determined.Compared with average concentration of trace elements in Chinese coal, the coals from Northern China contain a higher concentration of Hg, Se, Cd, Mn, and Zn. They may be harmful to the environment in the process of combustion and utilization. Vertical variations of trace elements in three coal seams indicated the distributions of most elements in coal seam are heterogeneous. Based on statistical analyses, trace elements including Mo, Cr, Se, Th, Pb, Sb, V, Be and major elements including Al, P shows an affinity to ash content. In contrast, Br is generally associated with organic matter. Elements As, Ni, Be, Mo, and Fe appear to be associated with pyrite. The concentrations of trace elements weakly correlate either to coal rank or to maceral compositions. 相似文献
15.
Geochemistry and Modes of Occurrence of Hazardous Trace Elements in the No. 11 Coal Seam, Antaibao Surface Mine, Shanxi Province 总被引：1，自引：0，他引：1 
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下载免费PDF全文 SONG Dangyu QIN Yong WANG Wenfeng ZHANG Junying ZHENG Chuguang 《《地质学报》英文版》2007,81(1):135-140
Concentrations of seventeen hazardous trace elements including As, Pb, Hg, Se, Cd, Cr, Co, Mo, Mn, Ni, U, V, Th, Be, Sb, Br and Zn in the No.ll coal seam, Antaibao surface mine, Shanxi Province were determined using Instrumental Neutron Activation Analysis （INAA）, Inductively Coupled Plasma Atomic Emission Spectrometry （ICP-AES）, Cold-Vapor Atomic Absorption Spectrometry （CV-AAS） and Graphite Furnace Atomic Absorption Spectrometry （GF-AAS）. Comparisons with average concentrations of trace elements in Chinese coal show that the concentrations of Hg and Cd in the No. 11 coal seam, Antaibao surface mine are much higher. They may be harmful to the environment in the process of utilization. The variations of the trace elements contents and pyritic suffur in vertical section indicated that： （a） the concentrations of As, Pb, Mn, and pyritic sulfur decrease from roof to floor; （b） the concentrations of Cr, Zn and Mo are higher in roof, floor and lower in coal seam; （c） the concentration of Br, Sb, and Hg are higher in coal seam and lower in roof and floor; （d） the concentrations of Mo, V, Th and AI vary consistently with the ash yield. Cluster analysis of trace elements, pyritic sulfur, ash yield and major elements, such as AI, Fe, P, Ca shows that： （a） pyritic sulfur, Fe, As, Mn, Ni, Be are closely associated and reflect the influence of pyrite; （b） Mo, Se, Pb, Cr, Th, Co, Ca and A! are related to clay mineral, which is the main source of ash; （c） U, Zn, V, Na, P maybe controlled by phosphate or halite; （d） Hg, Br, Sb and Cd may be mainly organic-associated elements which fall outside the three main groups. The concentration distribution characteristics of trace elements in coal seam and the cluster analysis of major and trace elements showed that the contents of trace elements in the No. 11 coal seam, Antaibao surface mine, are mainly controlled by detrital input and migration from roof and floor. 相似文献
16.
黑龙江省松嫩平原南部大气颗粒物地球化学特征及来源解析 总被引：1，自引：0，他引：1
研究采集了黑龙江松嫩平原南部28个夏季大气颗粒物样品,分析了不同粒径(TSP、PM10、PM2-5)样品中常量和微量元素含量,对元素浓度含量特征、元素间相关性和空间分布特征进行了分析,并使用富集系数法和因子分析法进行元素来源解析。研究表明：在PM10-100中富集的元素多在地壳中含量很高,重金属元素在PM2-5中高度富集,不同粒径大气颗粒物中各元素质量浓度整体水平为：大庆>绥化>哈尔滨>齐齐哈尔。富集因子分析表明：Fe、K、Ti、Mn、Co的富集因子小于1或非常接近1,Ca、Mg、Ni、Cr的富集因子大于1但仍小于10,Na、Zn、Cu、Cd、Pb、Se的富集因子大于10,表现出较为明显的人为来源特征。参照颗粒物不同源主要标识元素,对各元素进行主因子分析结果表明：松嫩平原南部大气可吸入颗粒物的主要来源是土壤扬尘,此外还有燃煤、垃圾焚烧、汽车尾气、碱尘大气传输、燃油和工业来源。 相似文献
17.
为研究元素在基岩-土壤-作物系统的迁聚特征,选取湛江市徐闻县菠萝主产区为研究区,采集土壤和菠萝样品,结合元素迁移系数、生物富集系数评价了基岩-土壤-菠萝系统元素的分布和迁聚特征。结果表明: 研究区土壤含富磷(TP)、土壤全铁(TFe2O3)、Co、Ge、S、Se含量丰富,土壤全氮(TN)含量中等,有机质含量以中等—较丰富为主,土壤全钾(TK)含量缺乏。基岩风化成土过程中,土壤中Pb、Cr、TFe2O3、Ni相对基岩表现为富集,Al2O3、Cu、Zn、Co、Mn、TP、K2O相对基岩表现为流失; 土壤中Co、Cr、Cu、Ge、Mn、Ni、Zn主要来源于磁铁矿风化蚀变,Se主要来源于黄铁矿风化蚀变。菠萝果实对Cd、Hg为微弱吸收,Cd相对其他元素更容易在菠萝果实中富集。Ge、As、Cd、Se、Ni在菠萝根部最为富集,Pb、Hg、Cr、Cu、Zn在菠萝叶片最为富集,菠萝果实对Cu、Pb、Cr、Hg的吸收存在协同作用。研究成果可为当地菠萝产业发展提供依据。 相似文献
18.
Selenium and heavy metals content in some Mediterranean soils 总被引：1，自引：0，他引：1
L. Roca-Perez C. Gil M.L. Cervera A. Gonzálvez J. Ramos-Miras V. Pons J. Bech R. Boluda 《Journal of Geochemical Exploration》2010
The study of metal contents in industrial, agricultural or/and polluted soils compared with natural or unpolluted soils is currently necessary to obtain reference values and to assess soil contamination. Nonetheless, very few works published appear in international journals on elements like Se, Li and Sr in Spanish soils. This study determines the total levels of Se, Li, Sr, As, Cd, Co, Cr, Cu, Ni, Pb, V, Zn, Fe, Mn and Ba in 14 natural (unpolluted) soils (Gypsisols, Leptosols, Arenosols and Acrisols), 14 agricultural soils (Anthrosols, Fluvisols and Luvisols), and 4 industrial–urban affected-surface soil horizons (Anthrosols and Fluvisols) of Eastern Spain. The geochemical baseline concentrations (GBC) and reference values (RV) have been established, and the relationships among elements and also between soil properties and elemental concentrations have been analysed. The RV obtained in this study were (mg kg−1): Se 2.68, Li 115, Sr 298, Cd 0.97, Co 35, Cr 217, Cu 46, Ni 50, Pb 137, V 120, Zn 246, Fe 124,472, Mn 2691, and Ba 743. The RV for Se and Li were used as a preliminary approach to assess soil contamination in Spanish soils. The results confirm human impact on Sr, As, Cd, Cr, Cu, Ni, Pb and Zn soil concentrations, but evidence no deviation from natural Se, Li, Co, V, Fe, Mn and Ba concentrations. The results obtained from the statistical analysis reveal significant correlations between some elements and clay and soil organic matter (SOM) contents, indicating that metal concentrations are controlled by soil composition. One particularly interesting finding is the high correlation coefficients obtained between SOM and Se, Cd, Cr, V, Fe, and Mn, and between clay and Cd, Zn, V, Fe and Mn. Once again, these facts confirm the role of SOM and clay minerals in soil functions and that soil is an ecosystem element responsible for maintaining environmental quality. 相似文献
19.
作物产量与土壤环境的关系 总被引：11，自引：1，他引：10
作物的产量与土壤元素中Ｎ、Ｐ、Ｋ、Ｎａ、Ｃａ、Ｍｇ、Ｓ、Ｆｅ、Ｍｎ、Ｃｕ、Ｚｎ、Ｂ、Ｍｏ、Ｖ、Ｃｏ、Ｎｉ、Ｃｒ、Ｐｂ、Ｃｄ、Ｈｇ、Ｓｅ、Ｆ、ＴＩ、Ｂａ、Ｔｅ、Ｔａ、Ｓｒ、Ｔｉ、Ｓｉ等元素及稀土、有机质、酸碱度和含水量、含盐量密切有关。 相似文献