Pharmaceutical Pollution: An Emerging Environmental Challenge

• Drug residues have been detected in groundwater, coastal waters, and rivers globally, threatening the balance of aquatic ecosystems.
• Approximately 1,000 active pharmaceutical compounds have been identified in water and soil, linked to risks such as antibiotic resistance.
• Between 30% and 90% of a drug is excreted unchanged into the environment, and existing wastewater treatment plants are largely incapable of removing these substances.

Sources and Scale of Pollution

• Pollution stems from pharmaceutical manufacturing, increased human consumption, and veterinary use.
• Improper disposal at home, despite collection systems, contributes to the issue as drugs are flushed or thrown in landfills.
• Roughly 48% of global wastewater is discharged into the environment without treatment, creating a "toxic cocktail" of emerging contaminants with unknown synergistic effects.

Policy and Mitigation

• The EU's new Urban Wastewater Treatment Directive (TARU) mandates that member states upgrade treatment facilities with quaternary control mechanisms by 2045.
• Researchers at the University of Jaén are testing Nature-Based Solutions (NBS), such as floating wetlands, through the NBS4Aquamissión project, which effectively remove high percentages of pharmaceutical pollutants.
• The development of sustainable, low-energy, and cost-effective treatment methods is a priority, given that many of these pharmaceuticals are essential and lack therapeutic alternatives.