摘要
为探索聊城市农田土壤污染状况及农业功能分区,以2017~2020年采集的74个表层土样为研究对象,测定了8种重金属元素(Cd、Hg、As、Cu、Pb、Cr、Zn和Ni)、BHC_(s)、DDT_(s)和BaP的含量。依据《土壤环境质量农用地土壤污染风险管控标准》和《绿色食品产地环境质量》作为评价标准,采用污染指数法开展了土壤环境质量评价和农业功能分区研究。采用ANOVA和LSD多重比较,确定了污染物的空间分布差异及其来源。依据山东省土壤背景值进行了重金属潜在生态风险评价。结果表明,除3个DDTs污染样点和1个Cd污染样点外,其他样点均处于清洁水平。在空间分布上,DDTs和Cr含量存在极显著差异,BaP和Hg存在显著差异。农业功能分区结果表明,绿色食品种植区、无公害食品种植区、观察种植区和污染区面积分别占研究区总面积的78.13%、9.45%、6.52%和5.90%。土壤环境生态风险水平以轻微为主,占总面积的77.03%。Hg和Cd在生态风险评估中占有较大比率,应高度警惕和严格监管。
We collected 74 topsoil samples during 2017~2020 to explore the pollution situation and agricultural function zoning in farmland soil in Liaocheng City,and analyzed the contents of 8 heavy metals(Cd,Hg,As,Cu,Pb,Cr,Zn and Ni),BHC_(s),DDT_(s) and BaP.Based on the standards of"soil environmental quality—risk control standard for soil contamination of agricultural land"and"green food—environmental quality for production area",the pollution index method was used to evaluate the soil environmental quality and to research agricultural function zoning.ANOVA and LSD multiple comparison were adopted to determine the spatial distribution difference and the sources of the pollutants.Based on the soil background values of Shandong province,the potential ecological risk of heavy metals was evaluated.The results showed that there were 3 samples polluted by DDTs and 1 sample polluted by Cd,the others were at clean levels.DDTs and Cr contents presented extremely significant differences in spatial distribution,and BaP and Hg presented significant contents differences.The results of agricultural function zoning showed that the proportion of green food planting area,non-polluted food planting area,observed planting area and contaminated area were 78.13%,9.45%,6.52%and 5.90%respectively.77.03%of the total area presented a slight level of potential ecological risk,Hg and Cd account for a large proportion in the assessment,and should be highly vigilant and strictly regulated.
作者
王岩
王倩
田晓飞
郭琳
WANG Yan;WANG Qian;TIAN Xiao-fei;GUO Lin(School of Geography and Environment/Liaocheng University,Liaocheng 252000,China)
出处
《山东农业大学学报（自然科学版）》
北大核心
2024年第2期184-192,共9页
Journal of Shandong Agricultural University：Natural Science Edition
基金
山东省自然科学基金项目(ZR2023MD091)。
关键词
重金属
有机污染物
轻微污染
生态风险评价
农业功能分区
Heavy metals
organic pollutants
slight contamination
ecological risk assessment
agricultural function zoning
