Scholarlink

<p>This study examines the impact of easing COVID-19 restrictions on heavy metal concentrations in paddy soil and rice in Mizoram, India (2021–2023). Concentrations of copper, manganese, zinc, iron, nickel, lead, arsenic, and cadmium were measured using ICP-MS. The Bioaccumulation Factor, Pollution Index, and Health Risk Index were calculated, which assessed metal uptake, pollution level, and health hazards, respectively. Post-pandemic, average heavy metal levels in soil increased significantly, likely due to resumed anthropogenic activities. Notably, nickel reached 0.94&#xa0;mg/kg (N. Vanlaiphai), lead 0.93&#xa0;mg/kg (Champhai), and arsenic 1.47&#xa0;mg/kg (Kolasib), exceeded the permissible limits. Corresponding increases in average concentration of heavy metal in rice were also recorded, with lead up to 0.18&#xa0;mg/kg (N. Vanlaiphai) and arsenic between 0.04 and 0.05&#xa0;mg/kg in all the sites, again surpassing the permissible limits. Spearman correlation analysis revealed a strong soil-to-rice correlation for cadmium (0.77) and moderate correlations (0.5–0.6) for copper, manganese, zinc, iron, and lead, indicating that elevated soil levels directly influence rice contamination. However, Bioaccumulation Factor values remained &lt; 1, suggesting that local rice cultivars restrict metal uptake. Pollution Index values &gt; 1 indicated contamination from arsenic (1.3) and lead (1.0) in both soil and rice, identifying them as key pollutants. Health Risk Index values &gt; 1 for arsenic further imply potential health risks from rice consumption, particularly when 500&#xa0;g of rice is consumed per day. These findings highlight rising environmental and health concerns linked to heavy metal accumulation in the post-pandemic period. We stress the need for targeted mitigation strategies, including phytoremediation, regulation of pollutant inputs, and regular environmental monitoring.</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

Post-pandemic assessment: A 3-year study of heavy metal risks in Mizoram's paddy agroecosystem

  • 期刊论文

  • 发表日期：

    2025年8月14日

查看全文
  • Hmingremhlua Sailo,
  • Lalremliani,
  • Laldinliana Khiangte,
  • Malsawmthanga,
  • Laldinfeli Ralte,
  • Remruattluanga Hnamte,
  • Lalfakzuala Ralte,
  • Y. Tunginba Singh

摘要

This study examines the impact of easing COVID-19 restrictions on heavy metal concentrations in paddy soil and rice in Mizoram, India (2021–2023). Concentrations of copper, manganese, zinc, iron, nickel, lead, arsenic, and cadmium were measured using ICP-MS. The Bioaccumulation Factor, Pollution Index, and Health Risk Index were calculated, which assessed metal uptake, pollution level, and health hazards, respectively. Post-pandemic, average heavy metal levels in soil increased significantly, likely due to resumed anthropogenic activities. Notably, nickel reached 0.94 mg/kg (N. Vanlaiphai), lead 0.93 mg/kg (Champhai), and arsenic 1.47 mg/kg (Kolasib), exceeded the permissible limits. Corresponding increases in average concentration of heavy metal in rice were also recorded, with lead up to 0.18 mg/kg (N. Vanlaiphai) and arsenic between 0.04 and 0.05 mg/kg in all the sites, again surpassing the permissible limits. Spearman correlation analysis revealed a strong soil-to-rice correlation for cadmium (0.77) and moderate correlations (0.5–0.6) for copper, manganese, zinc, iron, and lead, indicating that elevated soil levels directly influence rice contamination. However, Bioaccumulation Factor values remained < 1, suggesting that local rice cultivars restrict metal uptake. Pollution Index values > 1 indicated contamination from arsenic (1.3) and lead (1.0) in both soil and rice, identifying them as key pollutants. Health Risk Index values > 1 for arsenic further imply potential health risks from rice consumption, particularly when 500 g of rice is consumed per day. These findings highlight rising environmental and health concerns linked to heavy metal accumulation in the post-pandemic period. We stress the need for targeted mitigation strategies, including phytoremediation, regulation of pollutant inputs, and regular environmental monitoring.