Distribution of heavy metals in surface water and sediments of the Coata River Basin, Peru: Seasonal variability and ecological risk assessment
Mining, urban wastewater discharge, and intensive agriculture have degraded freshwater quality across the Andean Altiplano, yet integrated multi-parameter assessments remain scarce for high-altitude tributaries of Lake Titicaca. This study evaluated the spatial and seasonal distribution of seven heavy metals (As, Cd, C...