Wang Ping, Huang Weihua, Ren Fuyue, Fan Deqiang
School of Geography and Tourism, Qufu Normal University, Yan Tai Bei Lu 80, Rizhao City, Shandong Province, China.
Environ Monit Assess. 2023 May 11;195(6):657. doi: 10.1007/s10661-023-11230-9.
More than 40 enterprises have settled in the constructed steel-supporting industrial park adjacent to the Yellow Sea in Lanshan District, Rizhao City, eastern China. The concentration of heavy metals in the soil around steel factories often exceeds the limit specified by the national environmental agency. In this study, nine metals (Cu, Zn, Pb, Cd, Cr, Ni, Mn, Fe, and Mg) in the soil around the steel-supporting industrial park were examined, and 100 soil samples were analyzed. The pollution characteristics and sources of these heavy metals were obtained via pollution index analysis, potential ecological risk evaluation, geostatistical analysis, and multivariate statistical analysis combined with a positive matrix factorization (PMF) model. The results indicated that the heavy metals showed varying accumulation levels, among which Cd, Ni, and Pb were the major heavy metals greatly influencing the soil quality. The area around the steel factories exhibited heavy pollution and a high ecological risk, and Ni and Cd were the main risk factors. The soil at the steel factories and that in the southeastern and southwestern parts of the study area attained higher heavy metal element contents than those in the soil in other parts. PMF analysis confirmed that Cu, Pb, and Cd originated from mixed agricultural and traffic sources. Mn was related to natural sources. Cr and Ni likely resulted from atmospheric deposition, and Zn, Cd, Fe, and Mg were mainly associated with industrial materials, with these four sources accounting for 32.68%, 12.2%, 27.57%, and 27.54%, respectively, of the total metal content. This study could facilitate the investigation, evaluation, and source identification of soil heavy metal pollution in industrial regions and surrounding areas of Lanshan District, Rizhao City.
40多家企业已入驻位于中国东部日照市岚山区毗邻黄海的钢结构配套产业园区。钢铁厂周边土壤中的重金属含量常常超过国家环境机构规定的限值。在本研究中，对钢结构配套产业园区周边土壤中的9种金属（铜、锌、铅、镉、铬、镍、锰、铁和镁）进行了检测，并分析了100个土壤样本。通过污染指数分析、潜在生态风险评价、地统计分析以及结合正定矩阵因子分解（PMF）模型的多元统计分析，得出了这些重金属的污染特征和来源。结果表明，重金属呈现出不同的积累水平，其中镉、镍和铅是对土壤质量影响较大的主要重金属。钢铁厂周边区域污染严重且生态风险高，镍和镉是主要风险因素。钢铁厂以及研究区域东南部和西南部的土壤中重金属元素含量高于其他区域的土壤。PMF分析证实，铜、铅和镉源自农业和交通混合源。锰与自然源有关。铬和镍可能源于大气沉降，锌、镉、铁和镁主要与工业原料有关，这四种来源分别占金属总量的32.68%、12.2%、27.57%和27.54%。本研究有助于对日照市岚山区工业区及周边地区土壤重金属污染进行调查、评价和源识别。
