Scholarlink

<p>Food safety, a critical aspect of sustainable global development, is threatened by metal contamination in crops, particularly rice, which imperils food security and human health. This research investigated the concentrations, bioaccessibility, and associated human health risks of metals in rice from six paddy fields in Ghana's semi-deciduous forest zone. The concentrations of potentially toxic metals in soils and rice grains were analysed by X-ray fluorescence spectrometry and inductively coupled plasma mass spectrometry. Potentially toxic elements, (PTEs) concentrations in soil samples ranged from: arsenic &lt; 1.33 – 766&#xa0;mg/kg; chromium &lt; 5.22 – 418&#xa0;mg/kg; copper &lt; 5.72 – 1390&#xa0;mg/kg, Pb &lt; 1.84 – 7.04&#xa0;mg/kg, and Zn 8.67 – 633&#xa0;mg/kg while cadmium, mercury and nickel were mostly below detection. Soil pollution indices revealed low contamination in chromium, copper, lead, and zinc and considerable contamination in arsenic. Elevated metal levels may be attributed to the use of agrochemicals and mine-impacted water for irrigation. The mean concentrations of arsenic and lead in rice grains exceeded the WHO/FAO Codex Alimentarius standards (0.20&#xa0;mg/kg). Bioaccumulation and translocation factors showed low metal accumulation in rice, except for Zn. The human health risk assessment, incorporating bioaccessibility data, indicated a hazard index of less than 1 for all metals, suggesting minimal potential non-carcinogenic risks to the population from consuming rice from these areas. A comprehensive education program on the use of agrochemicals and sustainable irrigation practices that avoid the use of mining-impacted water is suggested to reduce metal contamination in paddy soils and subsequent transfer into rice grains.</p> Graphical Abstract <p></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

Metal Contamination and Health Risk in Paddy Soils and Rice from Ghana's Semi-Deciduous Forest Zone

  • 期刊论文

  • 发表日期：

    2025年8月12日

查看全文
  • Kwadwo Owusu Boakye,
  • Matt Dodd,
  • Maxwell Darko Asante,
  • Vincent Logah,
  • Godfred Darko

摘要

Food safety, a critical aspect of sustainable global development, is threatened by metal contamination in crops, particularly rice, which imperils food security and human health. This research investigated the concentrations, bioaccessibility, and associated human health risks of metals in rice from six paddy fields in Ghana's semi-deciduous forest zone. The concentrations of potentially toxic metals in soils and rice grains were analysed by X-ray fluorescence spectrometry and inductively coupled plasma mass spectrometry. Potentially toxic elements, (PTEs) concentrations in soil samples ranged from: arsenic < 1.33 – 766 mg/kg; chromium < 5.22 – 418 mg/kg; copper < 5.72 – 1390 mg/kg, Pb < 1.84 – 7.04 mg/kg, and Zn 8.67 – 633 mg/kg while cadmium, mercury and nickel were mostly below detection. Soil pollution indices revealed low contamination in chromium, copper, lead, and zinc and considerable contamination in arsenic. Elevated metal levels may be attributed to the use of agrochemicals and mine-impacted water for irrigation. The mean concentrations of arsenic and lead in rice grains exceeded the WHO/FAO Codex Alimentarius standards (0.20 mg/kg). Bioaccumulation and translocation factors showed low metal accumulation in rice, except for Zn. The human health risk assessment, incorporating bioaccessibility data, indicated a hazard index of less than 1 for all metals, suggesting minimal potential non-carcinogenic risks to the population from consuming rice from these areas. A comprehensive education program on the use of agrochemicals and sustainable irrigation practices that avoid the use of mining-impacted water is suggested to reduce metal contamination in paddy soils and subsequent transfer into rice grains.

Graphical Abstract