Environmental Analysis

Environmental Relevance of NSAIDs in Aquatic Systems Nonsteroidal anti-inflammatory drugs (NSAIDs) such as ibuprofen, diclofenac, and naproxen are among the most commonly detected pharmaceuticals in surface waters worldwide. These compounds enter aquatic environments primarily through wastewater effluent, agricultural runoff, and improper disposal. Even at trace concentrations (ng/L to µg/L), NSAIDs can cause adverse effects on […]

Wastewater Epidemiology: A Window into Community Drug Use Wastewater-based epidemiology (WBE) has emerged as a powerful, non-invasive tool for monitoring community-level consumption of illicit drugs and pharmaceuticals. By analyzing specific biomarkers—typically drug metabolites excreted in urine—in influent wastewater, researchers can estimate drug use trends in near real-time. This approach complements traditional survey methods, offering objective,

Overview of Endocrine Disrupting Chemicals Endocrine disrupting chemicals (EDCs) are exogenous compounds that interfere with the endocrine system, leading to adverse health effects in humans and wildlife. They include natural hormones like estrogens, synthetic compounds such as bisphenol A (BPA), phthalates, and persistent organic pollutants (POPs). The European Commission defines EDCs as substances that alter

Antibiotic Contamination in Aquaculture Aquaculture is a rapidly expanding sector of global food production, but its intensification has led to widespread use of antibiotics for disease prevention and growth promotion. This practice results in the release of antibiotic residues into surrounding water bodies through uneaten feed, fish excreta, and direct water discharge. These residues pose

Environmental Persistence of PFAS Per- and polyfluoroalkyl substances (PFAS) have garnered significant attention due to their extreme environmental persistence, bioaccumulation potential, and adverse health effects. These synthetic chemicals are widely used in industrial applications and consumer products for their water- and grease-resistant properties. Their carbon-fluorine bonds make them exceptionally stable, resisting degradation in the environment.

Trace Pharmaceuticals in Drinking Water Pharmaceutical residues in drinking water represent a growing concern for environmental regulators and public health officials worldwide. Even at trace levels (ng/L to µg/L), compounds such as antibiotics, hormones, and analgesics can pose ecological risks and potential human health effects. The challenge lies in their low concentrations and the complexity

Introduction Pesticide degradation products, often referred to as metabolites or transformation products, are increasingly recognized as critical environmental contaminants. While parent pesticides are routinely monitored, many degradation products exhibit higher mobility, persistence, and in some cases, greater toxicity than their precursors. Monitoring these compounds in surface water is essential for a comprehensive risk assessment of

Introduction to PFAS Contamination Issues Per- and polyfluoroalkyl substances (PFAS) are a group of synthetic chemicals widely used in industrial and consumer products due to their unique water- and oil-repellent properties. However, their extreme persistence in the environment and potential adverse health effects—including immune suppression, thyroid disruption, and certain cancers—have made them a top priority

SPE Sample Preparation for Trace Heavy Metal Chelates in Water Heavy metal contamination in environmental waters remains a critical global concern. While regulatory frameworks often target total metal concentrations, the speciation and chelation state of metals profoundly impact their toxicity, bioavailability, and environmental fate. Chelating agents—both naturally occurring (humic substances, amino acids) and anthropogenic (EDTA,

Hospital Wastewater as a Source of Pharmaceutical Metabolites Hospital wastewater is a significant point source for pharmaceutical residues and their metabolites, including antibiotics, analgesics, antidepressants, and contrast media. These compounds enter wastewater streams through patient excreta, disposal of unused medications, and laboratory activities. Unlike municipal sewage, hospital effluent contains higher concentrations of active pharmaceutical ingredients