In this study, we compared dissolved organic carbon (DOC) and UV removal efficiencies of the hybrid ozonation-coagulation (HOC) and pre-ozonation-coagulation (POC) processes for humic acid (HA) at pH 5 with AlCl•6HO as the coagulant. The DOC and UV removal efficiencies of the HOC process were higher than those of the POC process at ozone dosages less than 2.0 mg O (mg DOC). The ozone dosage was optimized at 0.3 and 0.1 mg O (mg DOC) for the HOC and POC processes, respectively, implying a more rigorous ozone dosage for the POC process. During the POC process, pre-ozonation was observed to increase the binding sites of HA (e.g., hydroxyl and carboxyl groups), improving the complexation of dissolved organic matter. For the HOC process, in addition to its role in the oxidation of organic matter, ozone also reacted with coagulants. The reaction between ozone and coagulants can facilitate the formation of Al. Moreover, the oxidation of •OH and ozone can increase the charge density of the HA binding sites, homogenizing the binding sites of HA and enhancing the complexation with Al.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.chemosphere.2021.130647 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Self-powered dual-photoelectrode photoelectrochemical aptasensor amplified by hemin/G-quadruplex-based DNAzyme.
Mikrochim Acta
January 2025
Department of General Surgery, Qilu Hospital (Qingdao), Cheeloo College of Medicine, Shandong University, 758 Hefei Road, Qingdao, Shandong, 266035, P.R. China.
A self-powered dual-electrode aptasensor was developed for the detection of tumor marker carcinoembryonic antigen (CEA). The composite BiVO/ZnInS, which is capable of forming a Z-scheme heterojunction, was chosen as the photoanode, and the AuNP/CuBiO complex was chosen as the photocathode in photoelectrochemical (PEC) detection. The experiments showed that the constructed self-powered dual-electrode system had a good photoelectric response to white light, and the photocurrent signal of the photocathode was significantly enhanced under the influence of the photoanode.
View Article and Find Full Text PDFEffect of marine anoxia on the conversion of macroalgal biomass to refractory dissolved organic carbon.
Mar Environ Res
January 2025
Marine Carbon Sink Research Center, Shandong Marine Resource and Environment Research Institute, Yantai, 264006, China; College of Oceanography and Ecological Science, Shanghai Ocean University, Shanghai, 201306, China.
The input of macroalgal biomass into the deep sea is a crucial process for macroalgal carbon sequestration, but this process may be affected by anoxia. We compared the breakdown of kelp biomass in both normoxic (>4 mg/L O) and anoxic (<2 mg/L O) environments. Following 240 days of decomposition experiment, complete degradation of the kelp biomass occurred in normoxic conditions, whereas under anoxic conditions, relatively 13.
View Article and Find Full Text PDFEmbryoscopy and targeted embryo biopsy for the management of early abortion.
J Assist Reprod Genet
January 2025
Centro de Asistencia a La Reproducción Humana de Canarias, La Laguna, Santa Cruz de Tenerife, Spain.
Purpose: To evaluate the safety, accuracy, and effectiveness of embryoscopy for the management of early abortion and to test the hypothesis that targeted embryo and chorionic villi sampling avoids maternal cell contamination (MCC) for genetic testing of products of conception (POC).
Methods: This ambispective study included 74 consecutive patients presenting with early abortion. Gestations between 5 and 9 weeks, obtained either spontaneously or through assisted reproductive technologies were included.
Increased Mineral-Associated Organic Carbon and Persistent Molecules in Allochthonous Blue Carbon Ecosystems.
Glob Chang Biol
January 2025
CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research (YIC), Chinese Academy of Sciences (CAS), Shandong Key Laboratory of Coastal Environmental Processes, YICCAS, Yantai, China.
Coastal wetlands contain very large carbon (C) stocks-termed as blue C-and their management has emerged as a promising nature-based solution for climate adaptation and mitigation. The interactions among sources, pools, and molecular compositions of soil organic C (SOC) within blue C ecosystems (BCEs) remain elusive. Here, we explore these interactions along an 18,000 km long coastal line of salt marshes, mangroves, and seagrasses in China.
View Article and Find Full Text PDFPortable SpectroChip-Based Immunoassay Platform for Rapid and Accurate Melamine Quantification in Urine Samples.
Toxics
November 2024
Research Center for Environmental Medicine, Kaohsiung Medical University, Kaohsiung 807, Taiwan.
Growing concerns about the health risks of melamine adulteration in food products highlight the urgent need for reliable detection methods. However, the long-term effects of chronic low-level melamine exposure remain inadequately explored. This study introduces THE ONE InstantCare platform, a portable immunoassay analyzer integrating a SpectroChip-based spectral processing unit (SPU) with lateral flow immunoassay (LFIA) for sensitive and accurate quantification of melamine in human urine.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!