Exposure to volatile organic compounds is a risk factor for diabetes: A cross-sectional study.

Evaluation of the biological response of propofol in zebrafish (Danio rerio): Focusing on biochemical, transcriptional, and molecular level.

Integrated genotoxicity of secondary and tertiary treatment effluents in North China.

Sewage is a significant source of many contaminants, and the effectiveness of sewage treatment plants (STPs) is fundamental to ensure that the effluents produced by these plants have a minimal impact on aquatic environments and guarantee their long-term sustainability. The present study is based on a global scientometric survey of the published research on the application of genotoxicity biomarkers for the analysis of the effects of the contaminants found in the effluents and residues produced by STPs. The literature search focused on the Web of Science and Scopus databases. Research trends were investigated based on the year of publication of each study, the country in which it was developed, the type(s) of genotoxic assay applied, the model organism(s), the type of study (experimental or field study), the physicochemical parameters analyzed, and the principal findings of the genotoxic assays. A total of 134 papers, published between 1988 and April 2023, were selected for analysis. The studies were conducted in a total of 33 different countries, but primarily in Brazil, China, Germany. These studies employed 16 biomarkers to assess genotoxicity, of which, the micronucleus test was the most used. The studies reported on a number of genotoxic substances, such as pollutants, including pesticides, microplastics, metals, and drugs. The data produced by these studies provide important insights into the genotoxic effect of the xenobiotic agents found in STP effluents, which are capable of damaging the DNA of a range of different organisms. 

Multi-taxon trends and the application of genotoxic biomarkers in the analysis of effluents from sewage treatment plant

Efforts in water ecosystem conservation require an understanding of causative factors and removal efficacies associated with mixture toxicity during wastewater treatment. This study conducts a comprehensive investigation into the interplay between wastewater estrogenic activity and 30 estrogen-like endocrine disrupting chemicals (EEDCs) across 12 municipal wastewater treatment plants (WWTPs) spanning four seasons in China. Results reveal substantial estrogenic activity in all WWTPs and potential endocrine-disrupting risks in over 37.5 % of final effluent samples, with heightened effects during colder seasons. While phthalates are the predominant EEDCs (concentrations ranging from <LOD to 4907.44 ng/L), estrogens, specifically 17β-estradiol (17β-E2), 17α-ethynylestradiol (EE2), estrone (E1), and estriol (E3), consistently contribute primarily (79.92 ± 8.43 %) to estrogenic activity in influent, secondary effluent, and final effluent in all WWTPs throughout the year. WWTPs consistently achieve high removal efficiencies (>86.39 %) for both estrogenic activity and major EEDCs (phthalates and estrogens), with the secondary and tertiary treatment segments contributing 88.59 ± 8.12 % and 11.41 ± 8.12 %, respectively. Among various secondary treatment processes, the anaerobic/anoxic/oxic-membrane bioreactor (A/A/O-MBR) excels in removing both estrogenic activity and EEDCs. In tertiary treatment, removal efficiencies increase with the inclusion of components involving physical, chemical, and biological removal principles. Furthermore, correlation and multiple liner regression analysis establish a significant (p < 0.05) positive association between solid retention time (SRT) and removal efficiencies of estrogenic activity and EEDCs within WWTPs. This study provides valuable insights from the perspective of prioritizing key pollutants, the necessity of integrating more efficient secondary and tertiary treatment processes, along with adjustments to operational parameters like SRT, to mitigate estrogenic activity in municipal WWTPs. This contribution aids in managing endocrine-disrupting risks in wastewater as part of ecological conservation efforts. 

Chemical-toxicological insights and process comparison for estrogenic activity mitigation in municipal wastewater treatment plants.

Integrated estrogenic effects and semi-volatile organic pollutants profile in secondary and tertiary wastewater treatment effluents in North China.

Considering the characteristics of linear induction motor that the primary leakage inductance and the secondary leakage inductance are not equal, the off-line parameter identification method for linear induction motor based on PWM inverter is proposed in this paper. Under the condition that the motor is stationary, single-phase DC voltage, single-phase high-frequency AC voltage, and single-phase low-frequency AC voltage are sequentially supplied to the motor to obtain primary resistance, mutual inductance, secondary leakage inductance, primary leakage inductance, and secondary resistance of the linear induction motor successively. Then, the offline parameter identification model of linear induction motor is established to carry out simulation experiments and verify the accuracy of the method. Finally, the proposed identification method is compared with the traditional no-load and locked-rotor experiment methods. The results show that the proposed identification method has higher precision for it considers the problem that the primary and secondary leakage inductance of linear induction motor are not equal.

Off-line Parameter Identification of Linear Induction Motor Based on PWM Inverter

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Integrated estrogenic effects and semi-volatile organic pollutants profile in secondary and tertiary wastewater treatment effluents in North China.

Off-line Parameter Identification of Linear Induction Motor Based on PWM Inverter

Integrated genotoxicity of secondary and tertiary treatment effluents in North China.