The article is devoted to the study of the content of heavy metals and radionuclides in soils of the environments of the Severodvinsk industrial district (Northwest Russia). The city of Severodvinsk is the largest industrial center for the Navy in North-western Russia. Soil samples were taken in the vicinity of the Severodvinsk industrial region in the areas where there are summer cottages and gathering places for wild berries and mushrooms collected by local residents. Heavy metal content studies were performed by ICP-MS. Measurements of the activity of radionuclides were carried out via the low-background semiconductor gamma-ray spectrometry method with a detector of especially pure germanium. Assessment of the degree of soil pollution with heavy metals was performed using geo-accumulation index parameters (Igeo), contamination factor (Cf), degree of contamination (Cd), enrichment factor (EF), and ecological risk index (ERI). The radiation safety parameters of the Severodvinsk industrial region soils were calculated, as were the absorbed dose rate of gamma radiation D_R, the equivalent of radium Raeq, and the external hazard index Hex. The sources of soil pollution are natural (geogenic) and anthropogenic (enterprises of the military-industrial complex, city heating systems, transport). The studies found a low level of heavy metal pollution and radionuclides in the soils of the environments of the Severodvinsk industrial region. Soils can be used by local people to grow food at their summer cottages. Also, the studied area is favorable for the collection of wild mushrooms and berries. However, closer attention should be paid to certain parts of the territory, since for some metals (As, Mn, Cd, and Pb) an increase in the parameters of the degree of soil pollution (Igeo, C_f, C_d, EF, and ERI) is observed.

中文翻译：

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俄罗斯西北部Severodvinsk工业区土壤中的重金属和放射性核素分布及环境风险评估

本文专门研究Severodvinsk工业区（俄罗斯西北部）环境土壤中的重金属和放射性核素含量。Severodvinsk市是俄罗斯西北部最大的海军工业中心。在Severodvinsk工业区附近的地区采集土壤样品，该地区有夏季农舍以及当地居民收集的野生浆果和蘑菇的聚集地。重金属含量的研究是通过ICP-MS进行的。放射性核素活性的测量是通过低背景半导体伽马射线光谱法，使用特别纯的锗探测器进行的。利用地积累指数参数（Igeo），污染因子（Cf），土壤重金属污染程度进行评估 污染程度（Cd），富集因子（EF）和生态风险指数（ERI）。计算了Severodvinsk工业区土壤的辐射安全参数，以及γ射线的吸收剂量率D _R，镭Raeq的当量值和外部危害指数Hex。土壤污染的来源是自然的（地质的）和人为的（军工联合企业，城市供热系统，运输企业）。研究发现，Severodvinsk工业区环境土壤中的重金属污染和放射性核素水平较低。当地人可以在夏天的农舍里用土壤种菜。此外，研究区域有利于野生蘑菇和浆果的收集。但是，应更加注意该地区的某些地区，因为对于某些金属（As，Mn，Cd和Pb），土壤污染程度参数（Igeo，C _f和C _{d）的增加}，EF和ERI）。