As the industries advances at a fast pace, efficient and simultaneous removal of both heavy metals and organics from aqueous is essential to protecting public human health and environment. In this work, we used pyrite as reductant and catalyst for simultaneously reducing Cr(VI) and activating persulfate (PS) to degrade acid orange 7 (AO7). The results indicated that the simultaneous removal rate of AO7 and Cr(VI) by pyrite-PS was up to 100% within 60 min under acidic conditions. However, There was a competitive relationship between PS activation and Cr(VI) reduction for robbing Fe. At beginning of the reaction, the limited Fe firstly activated persulfate rather than reduce Cr(VI). The effect of dosage of pyrite and PS on Cr(VI) reduction was more significant than that on AO7 degradation. Increased pyrite dosages from 1g·L to 6 g L resulted in enhanced Cr(VI) removal, and excessive PS (more than 0.4 g L) was not beneficial to Cr(VI) removal. Electron paramagnetic resonance (EPR) spectroscopy and radical scavenger studies demonstrated that sulfate (SO·), singlet oxygen (O) and superoxide radical (·O) were the crucial reactive oxygen species (ROS) in the pyrite-PS system rather than hydroxyl radical (·OH). This study showed that the pyrite-PS system could simultaneously remove AO7 and Cr(VI), which provided a new idea for the actual wastewater treatment.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.envres.2020.109876 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Coexistence of Giant Hydatid Cyst and Hepatocellular Carcinoma: A Case Report and Literature Review.
Iran J Parasitol
January 2024
Department of Radiology, Karaman Training and Research Hospital, Karaman, Turkey.
From a global perspective, hepatocellular carcinoma (HCC) and hydatid cyst disease are both common; however, the endemic and zoonotic nature of hydatid cysts (due to larvae) makes the simultaneous detection of the two conditions a rare occurrence. In this case report, in a 43-year-old male patient, we aim to draw attention to the potential coexistence of HCC and liver hydatid cysts by presenting a case in which HCC tissue was detected in the cyst wall-removed by emergency surgery due to cyst perforation. Hydatid lesions in the liver may exhibit tumor-like growth characteristics.
View Article and Find Full Text PDFReducing the molecular oxygen activation energy barrier by increasing Fe-O bonds to eliminate antibiotics and their resistance genes.
J Hazard Mater
December 2024
Guangzhou Environmental Technology Center, Guangzhou, Guangdong 510235, China.
Sulfamethoxazole (SMX) and its antibiotic resistance genes (ARGs) are potential threats to public health. Microwave catalytic technology is an efficient environmental remediation technology, and a reasonable design of the catalyst enables the system to achieve an ideal remediation effect under low microwave power. In this study, a microwave catalyst (FeCO-2) that activates molecular oxygen (O) was designed on the basis of rational theoretical organization.
View Article and Find Full Text PDFTD-STrans: Tri-domain sparse-view CT reconstruction based on sparse transformer.
Comput Methods Programs Biomed
December 2024
Department of Information and Communication Engineering, North University of China, Taiyuan 030051, China; The State Key Lab for Electronic Testing Technology, North University of China, Taiyuan 030051, China. Electronic address:
Background And Objective: Sparse-view computed tomography (CT) speeds up scanning and reduces radiation exposure in medical diagnosis. However, when the projection views are severely under-sampled, deep learning-based reconstruction methods often suffer from over-smoothing of the reconstructed images due to the lack of high-frequency information. To address this issue, we introduce frequency domain information into the popular projection-image domain reconstruction, proposing a Tri-Domain sparse-view CT reconstruction model based on Sparse Transformer (TD-STrans).
View Article and Find Full Text PDFGenerative adversarial networks with texture recovery and physical constraints for remote sensing image dehazing.
Sci Rep
December 2024
College of Electrical Engineering, Northeast Electric Power University, Jilin, 132012, China.
The scattering of tiny particles in the atmosphere causes a haze effect on remote sensing images captured by satellites and similar devices, significantly disrupting subsequent image recognition and classification. A generative adversarial network named TRPC-GAN with texture recovery and physical constraints is proposed to mitigate this impact. This network not only effectively removes haze but also better preserves the texture information of the original remote sensing image, thereby enhancing the visual quality of the dehazed image.
View Article and Find Full Text PDFDeciphering the key role of biofilm and mechanisms in high-strength nitrogen removal within the anammox coupled partial S-driven autotrophic denitrification system.
Bioresour Technol
December 2024
Key Laboratory of Environmental Remediation and Ecological Health, Ministry of Industry and Information Technology, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu, 210094, China; Engineering Research Centre of Chemical Pollution Control, Ministry of Education, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu, 210094, China. Electronic address:
Anammox coupled partial S-driven autotrophic denitrification (PSAD) technology represents an innovative approach for removing nitrogen from wastewater. The research highlighted the crucial role of biofilm on sulfur particles in the nitrogen removal process. Further analysis revealed that sulfur-oxidizing bacteria (SOB) are primarily distributed in the inner layer of the biofilm, while anammox bacteria (AnAOB) are relatively evenly distributed in inner and outer layers, with Thiobacillus and Candidatus Brocadia being the dominant species, respectively.
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!