Abstract
Background: Estrogens and their synthetic analogues are widely used as pharmaceuticals. Upon oral administration these drugs are eventually excreted via urine. The persistence of these pharmaceuticals and inefficient removal by water treatment lead to accumulation in surface water and effluents with negative effects for aquatic life and human health.
Methods: In this study, the uptake of estradiol by a combined magnetic ion exchange resin - ultrafiltration process (MIEX-UF) was investigated. This is a relatively common process used in drinking water treatment for the removal of natural organic matter. However, uptake of micropollutants, such as steroidal pharmaceuticals, may occur as a side effect of water treatment due to the high affinity for polymeric materials. To elucidate the mechanism governing estradiol partitioning between water, resin and membrane, the influence of different parameters, such as pH, humic acid concentration and membrane molecular-weight-cut-off (MWCO) was studied. Results: Humic acid concentration and pH affected estradiol uptake most. At pH 11 the most significant increase of estradiol uptake was observed for MIEX-UF process (30 ng/g corresponding to 80%) compared with individual UF (17 ng/g corresponding to 12%). The presence of humic acid slightly reduced estradiol uptake at pH 11 (about 55%) due to competition for the ion exchange binding sites. Conclusion: Results demonstrated that the uptake of estradiol, which is amongst the most potent EDCs detected in surface water, in the MIEX-UF process can reach significant quantities (30 ng/g of resin) leading to uncontrolled accumulation of this micropollutant during drinking water treatment. This study gives a novel contribution in the understanding the mechanism of the unanticipated accumulation of pharmaceuticals, such as estradiol, in the drinking water treatment process.Keywords: Magnetic ion exchange (MIEX®), ultrafiltration, estradiol, humic acid, micropollutants, natural hormones, estrogens.
Related Journals
Current Drug Safety
Current Medicinal Chemistry
Current Neuropharmacology
Current Pharmaceutical Analysis
Current Topics in Medicinal Chemistry
Current Vascular Pharmacology
Current Respiratory Medicine Reviews
Infectious Disorders - Drug Targets
Endocrine, Metabolic & Immune Disorders - Drug Targets
CNS & Neurological Disorders - Drug Targets
Related Books
New Findings from Natural Substances
Mitochondrial DNA and the Immuno-inflammatory Response: New Frontiers to Control Specific Microbial Diseases
Pharmaceutical Chemistry and Production: An Introductory Textbook
Evidence-Based Research in Ayurveda against COVID-19 in Compliance with Standardized Protocols and Practices
Frontiers in Clinical Drug Research – Anti Allergy Agents
Pharmaceuticals for Targeting Coronaviruses
Medical Applications of Beta-Glucan
Nanotechnology Driven Herbal Medicine for Burns: From Concept to Application
Postbiotics: Science, Technology and Applications
Frontiers in Inflammation
18
2