Non-target screening and priority assessment of organic pollutants in tropical island watershed water.

Numerous organic chemicals are present in aquatic environments, yet systematically identifying and prioritizing these compounds remains a major challenge, particularly in tropical island watersheds where data are scarce. In this study, we applied high-resolution mass spectrometry (HRMS)-based non-target screening to comprehensively characterize emerging organic pollutants in three major rivers of Hainan Province-Changhua, Wanquan, and Nandu. A total of 177 high-confidence compounds were identified, spanning pharmaceuticals, industrial additives, pesticides, and natural products.

Occurrence and risk assessment of current-use pesticides in a tropical drinking water source reservoir in Hainan Province, China.

The agricultural sector plays a pivotal role in Hainan Province, China; therefore, the utilization of pesticides is indispensable. The current ban on traditional pesticides and ongoing replacement of current-use pesticides (CUPs) have not been accompanied by extensive research on the presence of CUPs in reservoirs, which are vital centralized sources of drinking water. In this study, 26 CUPs was investigated in a drinking water source reservoir, the surrounding watershed, and the surrounding agricultural and domestic discharge water in Hainan Province.

Species-specific bioaccumulation and biotransformation of two novel brominated flame retardants in fish: Insights from isotope fractionation.

1,2-dibromo-4-(1,2-dibromoethyl)-cyclohexane (TBECH) and 1,2-bis(2,4,6-tribromophenoxyethane) (BTBPE), two novel brominated flame retardants, have been widely detected in diverse environmental media. However, information about their fate in aquatic environments is limited. In this study, two aquatic food chains comprising a prey species (tiger barb, TB) and two predator species (oscar fish, OF, and redtail catfish, RF) were established to examine the species-specific biotransformation and bioaccumulation of TBECH and BTBPE in fish.

Estimating wastewater emissions and environmental levels of typical organic contaminants based on regionalized modelling.

Organic contaminants (OCs) are released into the environment through effluent discharges from wastewater treatment plants (WWTP), posing risks to environment health. However, emissions from various source, particularly large-scale investigations across different industries, remain poorly understood. Based on both sampling and statistical data, this study estimates the emissions of 10 OCs, including perfluorooctane acid (PFOA), perfluorooctane sulfonate (PFOS), 4-nonylphenol (4-NP), 4-tert-octylphenol (4-t-OP), dibutyl phthalate (DBP), di-iso-butyl phthalate (DIBP), dimethyl phthalate (DMP), butyl benzyl phthalate (BBP), di(2-ethylhexyl) phthalate (DEHP), and bisphenol A (BPA), from the effluents of 160 factories across 8 industries, 541 municipal wastewater treatment plants (MWWTPs), and 8 waste treatment plants (WTPs) in the upper Yangtze River Basin.

Impact of land covers on pesticide contamination and the associated ecological risk in a major tributary of the Pearl River, South China.

Pesticide contamination in the river basins is closely associated with land covers. However, the impact of land covers on the pesticide contamination remains unclear. In this study, concentrations of 14 pesticides (10 insecticides, 3 fungicides, and 1 herbicide) in water were investigated along a major tributary of the Pearl River in wet and dry seasons in 2023.

[Analysis of urinary storage symptoms following transurethral resection of the prostate].

Objective: To explore the lower urinary tract symptoms (LUTS), especially those in the urinary storage phase, following transurethral resection of the prostate (TURP), and to improve the postoperative management and patients' quality of life after TURP.

Methods: A total of 86 patients with benign prostate hyperplasia (BPH) underwent TURP, and were interviewed on urinary symptoms at 1, 3, 7, 15 and 30 days after removal of the catheter. The patients were divided into two groups according to whether they had preoperative detrusor instability and/or compliance of the bladder (Group A) or not (Group B), and observed for the changes in IPSS scores and urinary storage symptoms after removal of the catheter.