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Ying Lyu
Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130026, China

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Short communication
Published: 14 July 2021 in Chinese Chemical Letters
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As an antibiotic, sulfadiazine has posed a serious threat to humans and ecosystems due to its chronic toxicity. The advanced oxidation processes (AOPs) via heterogeneous catalytic activation of peroxymonosulfate (PMS) have significant potential for the degradation of antibiotics. However, there are multiple restrictions including non-specifically binding to target contaminants, which would deplete oxidation capacity, and lacking energy effectiveness due to inefficient utilization of reactive oxygen species (ROS). To overcome these obstacles, we adopted the “bait-hook & destroy” strategy in this study. Herein, we synthesized a novel micrometer-sized NiOOH hierarchical spheres assembled from nanosheets, which have relatively large specific surface areas and yield specified cavities to “bait-hook” sulfadiazine and PMS onto the surface cavities. This process was further conductive to effective generation of ROS and subsequently “destroy” of sulfadiazine with elevated mass transformation rate. 20.4% of sulfadiazine can adsorb to NiOOH surface in less than 30 min (0.0051 min−1), and then sulfadiazine was completely degraded in 90 min intervals in the NiOOH/PMS system. The degradation rate constant (k = 0.0537 min−1) was about 5.3, 2.5 and 2.2 times higher than that in Ni2O3/PMS, NiO/PMS and Ni(OH)2/PMS system, respectively. This was ascribed to the synergistic catalytic oxidation and adsorption process occurred on the surface of NiOOH. Appreciably, there were both non-radicals (1O2) and radicals (O2•− and SO4•−) involved in the NiOOH/PMS system, and 1O2 was distinguished as the dominated ROS for degradation of sulfadiazine. This study provides a novel strategy via synergistic adsorption and catalytic oxidation, and indicates that the micrometer-sized NiOOH hierarchical sphere as heterogeneous catalyst is an attractive candidate for potential application of the SR-AOPs technology in water treatment.

ACS Style

Cong Lyu; Lu Zhang; Dan He; Boyuan Su; Ying Lyu. Micrometer-sized NiOOH hierarchical spheres for enhanced degradation of sulfadiazine via synergistic adsorption and catalytic oxidation in peroxymonosulfate system. Chinese Chemical Letters 2021, 1 .

AMA Style

Cong Lyu, Lu Zhang, Dan He, Boyuan Su, Ying Lyu. Micrometer-sized NiOOH hierarchical spheres for enhanced degradation of sulfadiazine via synergistic adsorption and catalytic oxidation in peroxymonosulfate system. Chinese Chemical Letters. 2021; ():1.

Chicago/Turabian Style

Cong Lyu; Lu Zhang; Dan He; Boyuan Su; Ying Lyu. 2021. "Micrometer-sized NiOOH hierarchical spheres for enhanced degradation of sulfadiazine via synergistic adsorption and catalytic oxidation in peroxymonosulfate system." Chinese Chemical Letters , no. : 1.

Journal article
Published: 24 May 2021 in Sustainability
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Laboratory experiments (150 days) were performed to analyze the influence of NO2 impurities on indigenous microbial communities and diversity with 16S rRNA sequence at real GCS site (Geological CO2 Sequestration, ordos, China) conditions (pressure: 15 MPa, temperature: 55 °C). The possible impact of metabolic activity on the GCS process was investigated through the BLASTn search. Compared with the pure CO2, results demonstrate that the biomass and biodiversity were lower, due to the lower pH, within 60 days after the co-injection of 0.1% NO2. Subsequently, the pH was quickly buffered through the corrosion of feldspar and clay, and the impact of NO2 had almost no obvious effect on the microbial structure except the abundance of phylum and genus after 90 days. In addition, acid-producing bacteria appeared after 60 days, such as Bacillus, Acinetobacter, and Lactococcus, etc., lower the pH in the solution and accelerate the dissolution of minerals. The Fe (III)-reducing microbes Citrobacter freundii reduce the Fe (III) released from minerals to Fe (II) and induce siderite (FeCO3) biomineralization through biogeochemical processes. Therefore, the co-injection of trace NO2 will not significantly affect the growth of microorganisms on long timescale.

ACS Style

Chenyang Li; Yunpeng Song; Yongjuan Zhu; Qingwei Meng; Ying Lyu. Impacts of NO2 Impurities on the Indigenous Microbial Community Structure and Diversity in CO2-Saline-Sandstone Interaction System. Sustainability 2021, 13, 5916 .

AMA Style

Chenyang Li, Yunpeng Song, Yongjuan Zhu, Qingwei Meng, Ying Lyu. Impacts of NO2 Impurities on the Indigenous Microbial Community Structure and Diversity in CO2-Saline-Sandstone Interaction System. Sustainability. 2021; 13 (11):5916.

Chicago/Turabian Style

Chenyang Li; Yunpeng Song; Yongjuan Zhu; Qingwei Meng; Ying Lyu. 2021. "Impacts of NO2 Impurities on the Indigenous Microbial Community Structure and Diversity in CO2-Saline-Sandstone Interaction System." Sustainability 13, no. 11: 5916.