This study evaluates the performance of a polymeric microfiltration membrane, as well as its combination with a coconut granular activated carbon (GAC) pretreatment, in a gravitational filtration module, to improve the quality of water destined to human consumption. The proposed membrane and adsorbent were thoroughly characterized using instrumental techniques, such as contact angle, Brunauer-Emmett-Teller) and Fourier transform infrared spectroscopy analyses. The applied processes (membrane and GAC + membrane) were evaluated regarding permeate flux, fouling percentage, pH and removal of Escherichia coli, colour, turbidity and free chlorine. The obtained results for filtrations with and without GAC pretreatment were similar in terms of water quality. GAC pretreatment ensured higher chlorine removals, as well as higher initial permeate fluxes. This system, applying GAC as a pretreatment and a gravitational driven membrane filtration, could be considered as an alternative point-of-use treatment for water destined for human consumption.
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http://dx.doi.org/10.1080/09593330.2011.589133 | DOI Listing |
J Environ Manage
December 2024
Department of Inorganic Chemistry and Chemical Engineering, Area of Chemical Engineering, Campus de Excelencia Internacional Agroalimentario ceiA3, Instituto Químico para la Energía y el Medioambiente (IQUEMA). University of Cordoba, Campus Universitario de Rabanales, Carretera N-IV, km 396, Edificio Marie Curie, 14071, Córdoba, Spain. Electronic address:
This study aims to develop a solver to calculate the dispersion of emitted odour from the main sources located in a large urban wastewater treatment plant (WWTP). Its seasonal odour impact on surrounding areas, including nearby populations, was also evaluated. Different seasons of the year were studied using the prevailing meteorological conditions in each case, within the framework of a Eulerian model.
View Article and Find Full Text PDFNeoadjuvant immunochemotherapy (NAIC) achieves superior clinical benefits over neoadjuvant chemotherapy (NAC) in multiple types of human cancers, including gastric adenocarcinoma (GAC). However, it is poorly understood how the malignant epithelial cells and tumor immune microenvironment (TIME) might respond distinctly to NAIC and NAC that underlies therapeutic efficacy. Here treatment-naive and paired tumor tissues from multiple centers were subjected to pathological, immunological, and transcriptomic analysis.
View Article and Find Full Text PDFNat Commun
October 2024
Department of Medical Oncology, Zhongshan Hospital, Fudan University, Shanghai, China.
Clin Transl Gastroenterol
August 2024
Department of Pathology, University of California San Francisco, San Francisco, California, USA.
Introduction: Early neoplastic progression of Barrett's esophagus (BE) is often treated with endoscopic therapy. Although effective, some patients are refractory to therapy or recur after apparent eradication of the BE. The goal of this study was to determine whether genomic alterations within the treated BE may be associated with persistent or recurrent disease.
View Article and Find Full Text PDFSci Total Environ
August 2024
School of Environmental and Ecology, Chongqing University, Chongqing 400044, China.
The structural variances of adsorbents play a crucial role in determining the number of effective adsorption sites and pretreatment performance. However, there is still a gap in comprehending the impact of different carbon structural adsorbents on membrane fouling. Therefore, this study aimed to compare the efficacy of granular activated carbon (GAC), powdered activated carbon (PAC), and activated carbon fiber (ACF) in mitigating membrane fouling during municipal sewage reclamation using an aerobic granular sludge membrane bioreactor (AGMBR).
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!