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Spatial variation in iodine content with relation to soil physicochemical properties in lower Himalayan region. | LitMetric

AI Article Synopsis

  • The topography of a place significantly affects soil characteristics, which in turn influences iodine levels, with the Lower Himalayan region (LHR) in Pakistan showing marked variations due to its climate and geology.
  • An investigation in the districts of Haripur and Mansehra found that iodine levels are higher in flat areas compared to mountainous regions, with Haripur having soils that retain more iodine due to factors like lower pH and higher organic matter.
  • In contrast, the elevated regions of Mansehra exhibited decreased iodine levels associated with poor soil quality, erosion, and unfavorable conditions that contribute to iodine deficiency-related health issues.

Article Abstract

Topography of a place has a significant impact on soil characteristics that ultimately influence soil iodine levels. Lower Himalayan region (LHR) in Pakistan has a wide range of climatic and geological variations. Hence, an investigation was conducted to analyze the iodine concentration and other physicochemical properties of soils in two LHR districts, Haripur and Mansehra. Spatial analysis indicated a decrease in iodine levels in the mountainous regions in comparison to the flat portions of LHR. Soil samples obtained from different locations across Haripur had a stronger affinity for iodine due to variations in solubility and adsorption of iodine to soil clay components, which can be attributed to lower pH, higher organic matter, and a higher cation exchange capacity (CEC). In contrast to the plains of Haripur, elevated locations in the Mansehra district had decreased levels of iodine, along with a higher soil pH and reduced soil organic matter. The soil erosion and depletion of soil micronutrients in the hilly region of Mansehra may be attributed to the unfavorable soil conditions and excessive precipitation. Presence of clay, iron (Fe), and aluminum (Al) in the soil led to a rise in iodine levels. Iodine concentrations exhibited an inverse relationship with soil acidity. Study revealed a direct correlation between soil iodine levels and their cation exchange capacity (CEC) and clay content. This study aims to gather fundamental data for the chosen regions of LHR to address illnesses caused by iodine deficiency.

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Source
http://dx.doi.org/10.1016/j.envres.2024.118569DOI Listing

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