CAJ | 학술논문

为了解惠州仲恺高新区土壤中重金属的含量及形态分布特征,在高新区两个园区(仲恺高新科技产业园、东江高新科技产业园)分6种土壤样本布设51个采样点,用五步连续提取法提取不同形态的重金属,ICP-AES检测重金属的含量. 结果发现,整个高新区土壤中Cr、Pb、Fe、Zn、Ti的含量低于全国土壤背景值,而A1区(生产基地中部,农用土)、A2区(生产基地边缘,农用土)、A3区(自然村,农用土)、A4区(靠近铁路,农用土)以及A5区(靠近铁路公路,道路旁泥土)的As、Co、Cu、Mn、Ni 5种重金属含量高于全国土壤背景值.A4和A5区的重金属含量较其他区域高.形态分析发现,10种重金属的残渣态比例较大,Pb和Mn的可交换态比例明显高于其他8种重金属, 容易引起生态危害,Cr、Ti和Fe基本上都是以残渣态存在,存在生态危害的风险较低,对Cu、Co、Ni、As、Zn则需要进一步定点分析. 除Ti和Fe外,重金属的残渣态比例与土壤类型具有相关性, 靠近公路和铁路的交通繁华区, 土壤重金属残渣态比例较低;但在农业生产区域,土壤重金属残渣态比例较高.
위료해혜주중개고신구토양중중금속적함량급형태분포특정,재고신구량개완구(중개고신과기산업완、동강고신과기산업완)분6충토양양본포설51개채양점,용오보련속제취법제취불동형태적중금속,ICP-AES검측중금속적함량. 결과발현,정개고신구토양중Cr、Pb、Fe、Zn、Ti적함량저우전국토양배경치,이A1구(생산기지중부,농용토)、A2구(생산기지변연,농용토)、A3구(자연촌,농용토)、A4구(고근철로,농용토)이급A5구(고근철로공로,도로방니토)적As、Co、Cu、Mn、Ni 5충중금속함량고우전국토양배경치.A4화A5구적중금속함량교기타구역고.형태분석발현,10충중금속적잔사태비례교대,Pb화Mn적가교환태비례명현고우기타8충중금속, 용역인기생태위해,Cr、Ti화Fe기본상도시이잔사태존재,존재생태위해적풍험교저,대Cu、Co、Ni、As、Zn칙수요진일보정점분석. 제Ti화Fe외,중금속적잔사태비례여토양류형구유상관성, 고근공로화철로적교통번화구, 토양중금속잔사태비례교저;단재농업생산구역,토양중금속잔사태비례교고.
Content and speciation analysis on heavy metals in Zhongkai Hi-tech Zone were analyzed in this study. Soil of Zhongkai High-Tech Industrial Park and East River high-tech industrial park wereclassified into 6 types and 53 samples were collected across all soil types. The method of five-step sequential extraction was used to extract different morphology of heavy metals.Content of heavy metals was detected with ICP-AES.Results showed that contents of Cr、Pb、Fe、Zn、Ti were not out of limits of the national standard in the whole Zhongkai Hi-tech Zone. However,contents of As,Co,Cu,Mn and Ni were higher than the national standard in A1 (agricultural soil in the middle of production base),A2 (agricultural soil at the edge of production base), A3 (agricultural soil of natural villages),A4 (agricultural soil close to the railway road)as well as A5(soil beside the road of railway and highway). Heavy metal content was higher in areas of A4 and A5 than other areas.Speciation analysis indicated that the residual form of the 10 heavy metalswere in high component. The proportions of exchangeable Pb and Mn were higher than other 8 heavy metals,which could lead to ecological hazard. Cr,Ti and Fe mainly existed in the residual form to be in lower ecological hazard.Cu、Co、Ni、As、Zn needed to be further analyzed in their distribution site. The portion of metal residual form was related to soil types except Ti and Fe.Portion of metal residual form was low in busy traffic areas close to the highway and railway and high in agricultural production areas.