CAJ | 학술논문

以晋南某钢铁厂土壤及周边农田表层土壤（0~20 cm）为对象，共设置49个采样点，用原子吸收法测定土壤Cd、Cr、Mn、Ni、Pb和Zn的质量分数，采用地积累指数法开展土壤重金属污染评价，潜在生态风险指数法进行潜在生态风险评价，并采用因子分析法对钢铁厂周边农田土壤重金属进行判源分析。结果表明：土壤重金属质量分数不同程度高于山西省土壤背景值，土壤Pb积累最为明显，存在偏中至中等污染。6种重金属潜在生态风险（E）大小顺序为：Cd（53.16）>Pb（21.17）>Ni （3.14）>Cr（3.38）>Mn（1.04）>Zn（1.1）。6种重金属的综合潜在生态风险指数（RI）平均为87.54，总体上属中等生态风险。Cd对RI的平均贡献率为60.05%，是主要的致险因子。炼铁厂区土壤污染比较严重，存在较强的潜在生态风险；厂区周围农田土壤重金属污染较轻，为轻微风险等级。钢铁厂周边农田土壤中的Mn和Ni属于自然源重金属，Cr和Cd属于混合源重金属，Zn和Pb属于工业源重金属。本研究可为本区土壤重金属环境污染与治理提供科学依据，同时为土壤重金属潜在生态风险评价提供更多案例研究。
이진남모강철엄토양급주변농전표층토양（0~20 cm）위대상，공설치49개채양점，용원자흡수법측정토양Cd、Cr、Mn、Ni、Pb화Zn적질량분수，채용지적루지수법개전토양중금속오염평개，잠재생태풍험지수법진행잠재생태풍험평개，병채용인자분석법대강철엄주변농전토양중금속진행판원분석。결과표명：토양중금속질량분수불동정도고우산서성토양배경치，토양Pb적루최위명현，존재편중지중등오염。6충중금속잠재생태풍험（E）대소순서위：Cd（53.16）>Pb（21.17）>Ni （3.14）>Cr（3.38）>Mn（1.04）>Zn（1.1）。6충중금속적종합잠재생태풍험지수（RI）평균위87.54，총체상속중등생태풍험。Cd대RI적평균공헌솔위60.05%，시주요적치험인자。련철엄구토양오염비교엄중，존재교강적잠재생태풍험；엄구주위농전토양중금속오염교경，위경미풍험등급。강철엄주변농전토양중적Mn화Ni속우자연원중금속，Cr화Cd속우혼합원중금속，Zn화Pb속우공업원중금속。본연구가위본구토양중금속배경오염여치리제공과학의거，동시위토양중금속잠재생태풍험평개제공경다안례연구。
Forty-nine topsoil samples were collected from a steel plant and around it in the south of Shanxi province, the concentrations of Pb, Zn, Cr, Cu and Ni in samples was determined by the atomic absorption spectrophotometry (AAS). Soil pollution levels and potential ecological risks with heavy metals were assessed using geo-accumulation index (Igeo) method and the potential ecological risk index method (RI) respectively. Factor analysis method was used to analyze the sources of soil heavy metals. The results show that, firstly, the soil heavy metal concentrations are higher than that of soil background values of Shanxi province, the contents of Pb in soil were significantly higher, and are in level of partial moderate to moderate pollution. Secondly, the consequence of the average Eir for heavy metals is Cd (53.16)>Pb (21.17)>Ni (3.14)>Cr (3.38)>Mn (1.04)>Zn (1.1). The value of average RI for metals is 87.54, which is of moderate ecological risk in general. The main factor for potential ecological risk is cadmium with the contribution rate of the total risk is 60.05%. Thirdly, the soil in the steel plant had polluted with metals seriously and appears strongly potential ecological risks, while the farmland soils around the plant polluted slightly and appears moderately ecological risk. The forth, Ni and Mn in farmland soils are natural-source metals mainly from soil parent material, Cd and Cr are mixed-source metals from parent material and agricultural activities, Pb and Zn are human-source metals mainly from the steel plant. The above results not only can be as the scientific basis for soil heavy metal pollution and its control in the area, but also can be as a case for the study of potential ecological risk assessment of heavy metals in soil.