scholarly journals Elimination of typical polycyclic musks in a full-scale membrane bioreactor combined with anaerobic–anoxic–oxic process in municipal wastewater treatment plant

2018 ◽  
Vol 78 (7) ◽  
pp. 1459-1465
Author(s):  
Chun-Ying Wu ◽  
Lu Bai ◽  
Feng Gu ◽  
Wei Wei ◽  
Li-Xiu Guo ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Membrane Bioreactor ◽  
Municipal Wastewater ◽  
Solid Phase ◽  
Treatment Plant ◽  
Gas Chromatography Mass Spectrometry ◽  
Municipal Wastewater Treatment ◽  
Municipal Wastewater Treatment Plant ◽  
Polycyclic Musks

Abstract The objective of this study was to investigate the removal of 11 synthetic polycyclic musks in a municipal wastewater treatment plant located in Jilin, China, by using a membrane bioreactor combined with anaerobic–anoxic–oxic process. The analysis of synthetic polycyclic musks was conducted with gas chromatography/mass spectrometry after solid-phase extraction. The removal efficiency of 11 synthetic polycyclic musks ranged from 65.9% (3-methylcyclopentadecanone) to 84.6% (Galoxolide) in the influent. Along the treatment process, it was observed that the anaerobic tank could remove the synthetic polycyclic musks effectively whereas the role of the membrane was to the musks, which could be ascribed to the relatively strong hydrophobic property of the musks. The sludge–water distribution coefficients (Kd values) as indicator of adsorption propensity for the sludge from anaerobic, anoxic, oxic and membrane tanks were measured. The high value of Kd, above 5.0 litres per gram of suspended solids, showed most of the musks could be removed by sludge through the adsorption process; thus the removal rate from the water phase caused by adsorption in the wastewater treatment plant can be predicted.

scholarly journals Emerging pollutants and antibiotics removed by conventional activated sludge followed by ultraviolet radiation in a municipal wastewater treatment plant in Mexico

2021 ◽  
Author(s):  
Ángeles Martínez-Orgániz ◽  
José Elías Becerril Bravo ◽  
María Llompart ◽  
Thierry Dagnac ◽  
J. Pablo Lamas ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Wastewater Treatment ◽  
Liquid Chromatography ◽  
Wastewater Treatment Plant ◽  
Municipal Wastewater ◽  
Solid Phase ◽  
Treatment Plant ◽  
Emerging Pollutants ◽  
Municipal Wastewater Treatment ◽  
Municipal Wastewater Treatment Plant

Abstract Different groups of emerging pollutants (EPs) were identified (drugs, pesticides, hormones, illicit drugs, and fire retardant), and the removal of four antibiotics was determined (sulfamethoxazole 62.2–94.4%, ciprofloxacin 71–83.1%, norfloxacin 82–89%, and ofloxacin 78–97.9%) in a municipal wastewater treatment plant (WWTP) in Acapulco, Gro. Mexico. The compounds were extracted from influent and effluent samples by solid phase extraction (SPE). The identification of non-target EPs was performed by liquid chromatography coupled with high-resolution mass spectrometry (LC-HRMS). The antibiotic quantification was performed by liquid chromatography coupled with tandem mass spectrometry (LC-MS/MS). Most of the non-target compounds were detected only in the influent samples. Antibiotics levofloxacin and nalidixic acid, the anticonvulsants carbamazepine and oxycarbamazepine, the local anesthetic lidocaine, and the pesticide tridemorph were the main EPs not removed by the WWTP. In this study, it was shown that the Aguas Blancas WWTP does not manage to remove 100% of the various EPs identified in the effluent, although the elimination degree is high in most cases, despite being one of the model plants in Mexico.

scholarly journals Determination of parabens in wastewater and sludge in a municipal wastewater treatment plant using microwaveassisted dispersive liquid-liquid microextraction coupled with gas chromatography-mass spectrometry

2019 ◽  
Vol 6 (3) ◽  
pp. 215-224
Author(s):  
Mohammad Mehdi Amin ◽  
Majid Hashemi ◽  
Karim Ebrahimpour ◽  
Afsane Chavoshani
Keyword(s):  
Wastewater Treatment ◽  
Microwave Power ◽  
Wastewater Treatment Plant ◽  
Municipal Wastewater ◽  
Limit Of Detection ◽  
Treatment Plant ◽  
Gas Chromatography Mass Spectrometry ◽  
Mass Loading ◽  
Municipal Wastewater Treatment ◽  
Municipal Wastewater Treatment Plant

Background: Due to the complexities involved in the extraction of micropollutants, the information regarding micropollutants like paraben in wastewater and sludge is scarce. The aim of this study was to adopt a microwave-assisted dispersive liquid-liquid micro-extraction (MADLLME) method for the extraction of parabens in municipal wastewater treatment plant (WWTP). Methods: A mixed stock solution of methyl-, ethyl-, propyl-, and butyl-parabens with concentration of 10 mg/mL were prepared in methanol. To validate this method, the limit of detection (LOD), limit of quantification (LOQ), linearity, and m/z were measured. To adopt this method in different condition, the effect of pH (3, 7, 9, and 12), microwave power (180, 300, 450, and 600 W), solvent type (methanol, acetone, methanol/water, acetone/water), and 1 g folorisil were assessed. After adopting MADLLME method, the paraben fate of this WWTP was evaluated through mass loading and emission. Results: The optimum performance of MADLLME method was observed at pH = 7, microwave power = 450 W, reaction time = 30 s, and methanol as the solvent. The total concentrations of four paraben metabolites in the WWTP ranged between 2505 ng/L in influent, 1953 ng/L in effluent, and 8.03 ng/g at wet weight sludge samples. The total mass loading and emission of four parabens in this WWTP was 0.672 mg/d/1000 people and 0.186 mg/d/1000 people, respectively. Conclusion: MADLLME method seems to be an excellent alternative, as a green extraction technique, for determining various groups of emerging micropollutants in different matrices.

Sign in / Sign up

Export Citation Format

Share Document