Scholarlink

Purpose <p>Organochlorine pesticides (OCPs) and their metabolites exhibit persistent residual characteristics in various environmental media, posing adverse effects on the health of plants, animals, and humans in ecosystems. This study aims to evaluate the current pollution status and potential risks of OCPs in farmland soils within Xinmin city’s black soil region through comprehensive residue investigation and risk assessment.</p> Materials and methods <p>A total of 109 soil samples were collected from farmland in Xinmin city. The soils were extracted using a soxhlet extractor, followed by purification and the detection of 23 OCP residues using gas chromatography. Spatial analysis of OCP residues was conducted using the Kriging interpolation method. Health risk assessment for OCPs was performed based on the computational formula prescribed by the EPA, while ecological risk was evaluated via the risk quotient method.</p> Results <p>The results indicated that OCP residues were detected at 47 sampling sites, with γ-HCH exhibiting the highest mean concentration of 31.62&#xa0;µg/kg and p, p’-DDE showing the highest detection rate of 26.60%. The total residual concentration of ΣDDTs exceeded that of ΣHCHs, accounting for 86.24% of the total OCP residues. OCPs in Xinmin city are mainly distributed in the northern and southern regions, showing widespread residual contamination. Although the total OCPs exposure risks for adults and children in Xinmin city were below the acceptable threshold (1E-06), the risk assessment revealed that ΣDDTs posed the highest risk via soil ingestion, with children being approximately 2.32 times more vulnerable than adults. Meanwhile, OCP residues induced moderate to high ecological risks, where γ-HCH reached high-risk levels (RQ &gt; 1) in localized hotspots.</p> Conclusions <p>OCPs are widely distributed across Xinmin’s soils, with some sites exceeding Dutch remediation thresholds (for both ΣDDTs and ΣHCHs: 2.50&#xa0;µg/kg). While overall carcinogenic risk remains low, children face heightened susceptibility through soil ingestion. Additionally, the ΣDDTs residues at 22.93% and 0.92% of the sampling sites had reached levels that can induce secondary toxic effects on birds and mammals, respectively. It is imperative to formulate and implement relevant policies and measures to control and mitigate OCPs pollution.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Residues and risk assessment of organochlorine pesticides (OCPs) in farmland soils of the black soil Region, Xinmin City

  • 期刊论文

  • 发表日期：

    2026年3月3日

查看全文
  • Jian Chang,
  • Lianghe Lv,
  • Shuang Cui,
  • Weijun Qi,
  • Xinyue Liu,
  • Hang Gao,
  • Tao Zhang

摘要

Purpose

Organochlorine pesticides (OCPs) and their metabolites exhibit persistent residual characteristics in various environmental media, posing adverse effects on the health of plants, animals, and humans in ecosystems. This study aims to evaluate the current pollution status and potential risks of OCPs in farmland soils within Xinmin city’s black soil region through comprehensive residue investigation and risk assessment.

Materials and methods

A total of 109 soil samples were collected from farmland in Xinmin city. The soils were extracted using a soxhlet extractor, followed by purification and the detection of 23 OCP residues using gas chromatography. Spatial analysis of OCP residues was conducted using the Kriging interpolation method. Health risk assessment for OCPs was performed based on the computational formula prescribed by the EPA, while ecological risk was evaluated via the risk quotient method.

Results

The results indicated that OCP residues were detected at 47 sampling sites, with γ-HCH exhibiting the highest mean concentration of 31.62 µg/kg and p, p’-DDE showing the highest detection rate of 26.60%. The total residual concentration of ΣDDTs exceeded that of ΣHCHs, accounting for 86.24% of the total OCP residues. OCPs in Xinmin city are mainly distributed in the northern and southern regions, showing widespread residual contamination. Although the total OCPs exposure risks for adults and children in Xinmin city were below the acceptable threshold (1E-06), the risk assessment revealed that ΣDDTs posed the highest risk via soil ingestion, with children being approximately 2.32 times more vulnerable than adults. Meanwhile, OCP residues induced moderate to high ecological risks, where γ-HCH reached high-risk levels (RQ > 1) in localized hotspots.

Conclusions

OCPs are widely distributed across Xinmin’s soils, with some sites exceeding Dutch remediation thresholds (for both ΣDDTs and ΣHCHs: 2.50 µg/kg). While overall carcinogenic risk remains low, children face heightened susceptibility through soil ingestion. Additionally, the ΣDDTs residues at 22.93% and 0.92% of the sampling sites had reached levels that can induce secondary toxic effects on birds and mammals, respectively. It is imperative to formulate and implement relevant policies and measures to control and mitigate OCPs pollution.