24年11月4日文献情报
点击阅读原文进入数据库检索： 以文章编号N241104为检索词可查询到的文章数量: 3。长按文章二维码识别后可跳转至文章所在期刊网页，关注天然有机质文献简报小程序追踪最新100篇文献摘要。 |
【简要】
本次文献简报涉及表面电场增强生物炭[1]，药物和个人护理用品在溶解黑碳溶液中的间接光降解[2]，铁基纳米材料对堆肥过程中有机碳动态及温室气体排放的影响[3]。
1. 题目: Surface electric fields-enhanced biochar: A dual-action adsorbent and PMS activator for sulfamethoxazole removal
文章编号: N24110403
期刊: Separation and Purification Technology
作者: Long Sui, Hai Guo, Ya-Ya Yang, Zheng-Tao Dong, Qian Wu, Cong Yi, Cheng-Gang Niu, Ming Yan, Jia-Jia Wang, Li-Shi Feng, Da-Wei Huang
更新时间: 2024-11-04
摘要: Integrating adsorption with advanced oxidation processes offers significant advantages over conventional single-stage wastewater treatment methodologies. Herein, this study successfully synthesized nitrogen-boron codoped metal-free biochar at 700 °C (700NBBC). 700NBBC effectively eliminates sulfamethoxazole (SMX) from water through a synergistic adsorption-oxidation process, showcasing robust resistance to interference and broad pH tolerance. Characterizations and experimental outcomes indicate that 700NBBC primarily adsorbs SMX through a monolayer surface chemical adsorption mechanism and activates persulfate (PMS) to oxidize SMX via a non-radical mechanism, which includes the generation of singlet oxygen (1O2) and electron transfer processes. Density functional theory calculations elucidate that N and B doping regulate the local electronic environment at biochar surface, enhancing the adsorption energy between biochar and PMS while effectively catalyzing PMS cleavage to generate 1O2. This research offers fresh perspectives on the critical role of heteroatom doping in regulating reactive oxygen species generation within biochar.
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2. 题目: Indirect photodegradation of pharmaceutical and personal care products in dissolved black carbon solution: The role of microheterogeneous distribution of hydroxyl radical and sorption
文章编号: N24110402
期刊: Water Research
作者: Huaxi Zhou, Hui Wang, Huili Wang, Xuedong Wang, Zhaolian Ye, Xiaojun Hu
更新时间: 2024-11-04
摘要: Dissolved black carbon (DBC) with a hyperconjugated structure is ubiquitous in nature, and plays a crucial role in the migration and transformation of environmental contaminants due to its prominent properties of accepting electrons and sorption. However, little is known about the DBC-induced phototransformation of pharmaceutical and personal care products (PPCPs) in natural waters. Herein, the photodegradation kinetics of PPCPs were investigated in DBC solution under simulated solar irradiation and compared with those in Suwannee River natural organic matter (SRNOM) solution. The decay rates for the positively charged PPCPs (mean 1.484 ± 0.041 h-1) were significantly higher than those for the negatively charged PPCPs (mean 0.014 ± 0.002 h-1) in DBC solution due to the charge interaction. Moreover, the decay rates for the positively charged PPCPs in DBC solution were approximately 3–16 times of those in SRNOM solution due to the discrepant sorption and ability to produce bonded HO•. Finally, a microheterogeneous photodegradation mechanism of HO•-labile PPCPs in DBC solution involving the sorption and subsequent reaction with bonded HO• in the DBC microphase was proposed, which was verified using isopropanol and isopropamide as selective HO• scavengers. This work will provide useful insights into the photochemistry of DBC and also the DBC-involved phototransformation of PPCPs in aquatic environments.
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3. 题目: Effect of iron-based nanomaterials on organic carbon dynamics and greenhouse gas emissions during composting process
文章编号: N24110401
期刊: Environmental Research
作者: Pengjiao Tian, Shentao Yang, Mingxin Yang, Duo Xie, Haizhong Yu, Xiqing Wang
更新时间: 2024-11-04
摘要: Iron-based nanomaterials as effective additives can enhance the quality and safety of compost. However, their influence on organic carbon fractions changes and greenhouse gas emissions during composting remains unclear. This study demonstrated that iron-based nanomaterials facilitate the conversion of light organic carbon fraction into heavy organic carbon fraction, with the iron-based nanomaterials group showing a significantly higher heavy organic carbon fraction content (41.88%) compared to the control group (35.71%). This shift led to an increase in humic substance content (77.5 g/kg) and a reduction in greenhouse gas emissions, with CO2, CH4, and N2O emissions decreasing by 20.5%, 39.7%, and 55.4%, respectively. Additionally, CO2-equivalent emissions were reduced by 42.9%. Microbial analysis revealed that iron-based nanomaterials increased the abundance of Bacillus and reduced the abundance of methane-producing archaea such as Methanothermobacter and Methanomassiliicoccus. These results indicated that the role of iron-based nanomaterials in regulating reactive oxygen species production and specific microbial communities involved in humification process. This study provides a practical strategy for improving waste utilization efficiency and mitigating climate change.
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