Article
Agricultural Engineering
Wenyu Li, Yongzhen Peng, Ruitao Gao, Qiong Zhang, Xiyao Li, Chengkun Kao, Jianwei Li
Summary: This study investigates the impact of low salinity levels on a double-anammox system in treating municipal wastewater, finding that a salinity of 1.0% led to a nitrogen removal efficiency of 81.2%, with a significant contribution of 76.5% from anammox. Low salinity was also found to promote nitritation and denitratation, enhancing the overall nitrogen removal efficiency. The enrichment of specific microbial populations, such as Ca. Brocadia and Nitrosomonas, further supported the effectiveness of the double-anammox process in treating saline wastewater.
BIORESOURCE TECHNOLOGY
(2022)
Article
Environmental Sciences
Mengyue Zhao, Xiufeng Tang, Dongyao Sun, Lijun Hou, Min Liu, Qiang Zhao, Uli Klumper, Zhexue Quan, Ji-Dong Gu, Ping Han
Summary: The recent discovery of complete ammonia oxidizers (comammox) challenges the traditional understanding of nitrification, showing that one organism can convert ammonia to nitrate. This study on nitrifying microorganisms in the Nanliu estuary demonstrates the niche specificity of different nitrifiers modulated mainly by salinity. The research also reveals a clear response by comammox Nitrospira to a wide range of simulated salinity levels.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Biotechnology & Applied Microbiology
Dongyao Sun, Mengyue Zhao, Xiufeng Tang, Min Liu, Lijun Hou, Qiang Zhao, Jun Li, Ji-Dong Gu, Ping Han
Summary: The discovery of complete ammonia oxidizers (comammox) has changed the traditional view of nitrification being a two-step process. Comammox Nitrospira species were found to be widely distributed in the Yangtze Estuary, with a distinct differentiation driven by salinity. Besides salinity, ammonia, pH, and particle size were also important environmental factors that influenced the niche differentiation of comammox Nitrospira species.
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
(2021)
Article
Environmental Sciences
Siyuan Gong, Yujie Qin, Shaohong Zheng, Tiansheng Lu, Xiangjing Yang, Ming Zeng, Hongen Zhou, Jiannv Chen, Weichan Huang
Summary: This study aimed to start up the CANON process after adding PN sludge to the ANAMMOX reactor for rapid start-up and stable operation. PN sludge was successfully cultivated in less than 45 days with a nitrite accumulation rate of around 90%. The ANAMMOX reactor enriched red granular sludge within 70 days, achieving a maximum nitrogen removal rate of 1.74 kg/(m(3).d). Eventually, the CANON reactor was started up successfully, achieving high ammonium and total nitrogen removal efficiency.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Environmental Sciences
Liru Fan, Huayu Li, Yao Chen, Fangxu Jia, Tao Liu, Jianhua Guo, Hong Yao
Summary: The study evaluated the effects of heavy metals on the completely autotrophic nitrogen-removal over nitrite (CANON) process and established a mathematical model to simulate the CANON system considering these impacts.
Article
Engineering, Environmental
Wenyu Li, Qiong Zhang, Jianwei Li, Ruitao Gao, Chengkun Kao, Xiyao Li, Yongzhen Peng
Summary: Nitrogen removal from saline municipal wastewater has become an area of interest, leading to the development of the energy-efficient technique of anaerobic ammonium oxidation (anammox) for advanced nitrogen removal. This study investigated the long-term salt adaptation and evolution mechanisms of an anammox-based process under different salinities. The results showed that the anammox bacteria had strong adaptability to salinity, with contribution levels of over 85% even at high salinity levels. Metagenomic sequencing revealed that the production of multiple nitrite substrates by specific bacteria ensured a high anammox contribution. This study provides valuable insights for the improved application of anammox-based processes in saline wastewater treatment.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Xingxing Xiong, Yun Li, Xin Yang, Zhiyuan Huang, Dongliang Wang, Zebing Li
Summary: This study investigated the combined inhibition of neodymium (Nd(III)) and sulfate (Na2SO4) on anaerobic ammonium oxidation (Anammox) in wastewater treatment. The results showed that high concentrations of Nd(III) or Na2SO4 decreased Anammox activity, with intracellular Nd(III) identified as the primary factor for Nd(III) inhibition. Furthermore, the combined inhibition of Nd(III) and Na2SO4 was stronger than individual inhibition, but low doses of hydroxylamine (NH2OH) could restore Anammox activity. The study also found that low doses of Na2SO4 and Nd(III) did not significantly affect the long-term performance of Anammox, but increased Na2SO4 concentration led to decreased total nitrogen removal efficiency (TNRE). The use of inhibitors such as NH2OH could improve TNRE. Mathematical models and microscopic analysis were used to describe the inhibition effects and recovery process of Anammox.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Environmental Sciences
Myeonghwa Park, Jeongmi Kim, Teaho Lee, You-Kwan Oh, Van Khanh Nguyen, Sunja Cho
Summary: The study found that high salinity inhibits Anammox microbial activity, but high nitrogen removal efficiency can still be achieved at 2% salinity. In high salinity environments, the abundance of Anammox bacteria increases, replacing heterotrophic denitrifying bacteria.
Article
Engineering, Environmental
Yang Su, Hong Yang, Xiaotong Wang, Xuyan Liu, Jiawei Wang
Summary: Shortening HRT and altering granule assembly can significantly enhance anammox activity, while increasing the abundance of anammox bacteria and particle size contributes to improving SAA.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Engineering, Environmental
Muhammad Naufal, Jer-Horng Wu, Yung-Hsien Shao
Summary: This study identified two distinct osmoadaptation groups in anammox bacteria and demonstrated the effectiveness of glutamate in alleviating osmotic stress in Ca. Kuenenia. This research provides genomic insights that can aid in the precise management of anammox reactors under high salinity conditions.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Environmental
Yang Su, Hong Yang, Xiaotong Wang, Xuyan Liu
Summary: This study demonstrated that the anammox process can stably operate in high-salt environments with the selection of functional bacteria genus Unclassified Candidatus Brocadiaceae. Nitrogen accumulation cannot be alleviated by simply reducing substrate concentration at low temperatures. Adding proper amount of active sludge can quickly improve nitrogen removal performance in adverse conditions and restore it to normal levels.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Environmental Sciences
Wenru Liu, Qian Wang, Yaoliang Shen, Dianhai Yang
Summary: This study successfully started a high-rate CANON process by enhancing in-situ enrichment of anammox bacteria in aerobic granules. The dominant anammox species was Ca. Brocadia sapporoensis with an estimated growth rate of 0.008-0.013 d(-1) at 15 degrees C. The granular CANON process showed high total nitrogen removal rate and efficiency under aggressive conditions.
Article
Engineering, Environmental
Kazuyoshi Koike, Garrett J. Smith, Ryoko Yamamoto-Ikemoto, Sebastian Lucker, Norihisa Matsuura
Summary: Microbial ammonia oxidation is an important step in water treatment processes, and the discovery of complete ammonia-oxidizing bacteria has added a novel member to this group. In this study, a full-scale bioreactor was used to treat ammonium in groundwater, and Nitrospira was found to be the predominant ammonia-oxidizing prokaryote. Copper addition was found to affect the population structure of ammonia-oxidizing bacteria.
Article
Engineering, Environmental
Meina Hu, Xiaojing Liu, Tao Ya, Junyu Liu, Minglu Zhang, Xiaohui Wang
Summary: The effects of different dissolved oxygen (DO) conditions (0.3 and 1.0 mg/L) on microbial interactions in the partial nitrification/anammox (PN/A) process were investigated. High DO concentration (1.0 mg/L) inhibited anammox bacteria activity while enhancing nitrite oxidation bacteria (NOB) activity in the PN/A reactor. The presence of 1.0 mg/L DO promoted the abundance of NOB and some heterotrophic microorganisms, while decreasing the abundance of ammonia oxidizing bacteria and anammox bacteria. The changes in microbial interactions under 1.0 mg/L DO may lead to deterioration in nitrogen removal.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Environmental Sciences
Jiawei Wang, Shiliang Liu, Yan Zhang, Si Zhang, Jiaju Liu
Summary: This study compared the effects of intact and crushed ammonia oxidation granular sludge (AnGS) immobilized fillers on the completely autotrophic N-removal over nitrite (CANON) process in domestic sewage. The results showed that the crushed AnGS immobilized filler achieved a total nitrogen removal (TNR) of 75.8-80.0% at a dissolved oxygen (DO) concentration of 3 mg/L, while the intact AnGS immobilized filler required a DO of 4 mg/L to achieve the same TNR level. The study indicated that the use of AnGS immobilized filler is a promising strategy to enhance the CANON process in municipal wastewater treatment.
Article
Biotechnology & Applied Microbiology
Yukuan Duan, Lifen Liu
Summary: The Z-scheme ternary heterojunction of g-C3N4 and BiOI co-modified with Bi2WO6 (BCB) was prepared to enhance photocatalyst activity. The optimized doping ratios of 3 wt% BiOI/10 wt% g-C3N4/Bi2WO6 exhibited excellent catalytic performance in degrading rhodamine B (RhB) under visible light irradiation, achieving almost complete degradation in 30 minutes and a high reaction kinetic constant of 0.245 min(-1). The catalyst showed good stability and removal effect for different concentrations of tetracycline (TC), indicating its potential application in pollution control.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2023)
Article
Nuclear Science & Technology
Jawaria Ahad, Talha Rizwan, Amjad Farooq, Khalid Waheed, Masroor Ahmad, Kamran Rasheed Qureshi, Waseem Siddique, Naseem Irfan
Summary: The filtered containment system is a passive safety system used to control over-pressurization of containment in design-based accidents by venting a high-pressure mixture of air, steam, and radioactive gases, such as iodine, through a scrubbing system. A lab-scale facility was developed to study iodine removal using a venturi scrubber, simulating accidental scenarios. A modified mathematical model was proposed to improve the efficiency of iodine removal by considering important parameters that were not previously included. Experimental results showed that removal efficiency increased with liquid level height and gas flow rate up to an optimum point before decreasing. The maximum removal efficiency achieved was 99.8%.
NUCLEAR ENGINEERING AND TECHNOLOGY
(2023)
Article
Chemistry, Physical
Haiwei Yang, Lvzhu Cheng, Qiliang Yang, Amjad Farooq, Lili Ying, Peng Wang, Zongqian Wang
Summary: The integration of natural textiles and MXene has great potential for the development of wearable thermal management materials. However, the susceptibility of MXene to oxidation and the weak interaction between MXene and fibers pose challenges in fabricating MXene-decorated textiles with durable and stable thermal management performance. In this study, a novel surface modification strategy using natural sericin was proposed to protect MXene and enhance its stability. The fabricated MXene-coated silk fabrics not only demonstrated excellent thermal management performance, but also possessed superior breathability, laundry durability, and flame retardancy.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Environmental
Yuting Liu, Changfei Gao, Lifen Liu, Hongbo Wang
Summary: Abuse of antiviral drugs in natural water is a significant concern. In this study, a novel CuMn2O4@WO3/g-C3N4 ((CMNW)CN) cathode electrode was developed for the photoelectrocatalytic degradation of acyclovir in a Photo-Bio-Electro-Fenton (PBEF) system. The (CMNW)CN electrode exhibited excellent redox performance and efficient electron transfer efficiency. The study identified three degradation pathways and eight degradation intermediates, and confirmed the high degradation efficiency of acyclovir using the (CMNW)CN electrode within 30 minutes.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Jing Wang, Ling Li, Baihui Chi, Jiajia Shan, Xianliang Yi, Yang Liu, Hao Zhou
Summary: The use of disinfectants made from quaternary ammonium compounds (QACs) has increased significantly since the outbreak of SARS-CoV-2. However, the effect of QACs on wastewater treatment performance remains unclear. This study investigated the effect of a commonly used QAC, benzyl dodecyl dimethyl ammonium bromide (BDAB), on nutrient removal in a moving-bed biofilm reactor (MBBR). The results showed that high BDAB concentrations significantly reduced ammonia removal efficiency and nitrate production rate constants, but the inhibition could be partially recovered by lowering the BDAB concentration. Metagenomic sequencing revealed different functional genera in the control and BDAB-added reactors, and analysis of functional genes suggested potential ecological risks associated with BDAB introduction in WWTPs.
Article
Materials Science, Textiles
Mengmeng Li, Qiuyu Xu, Wei Jiang, Amjad Farooq, Yirui Qi, Lifang Liu
Summary: In this study, Fe3O4 nanoparticles and graphene oxide (GO) are combined to form Fe3O4@reduced graphene oxide (rGO) composites. Cellulose nanofiber (CNF) and l-ascorbic acid are then added, and the mixture is freeze-dried to produce Fe3O4@rGO/CNF foams. The resulting foams exhibit improved electrical conductivity and magnetism, making them suitable for electromagnetic interference (EMI) shielding materials. The optimized foam shows an EMI shielding effectiveness value of approximately 23 dB in the X-band, thanks to the porous structure and composition of Fe3O4@rGO/CNF foams. This research provides a reference for the design and fabrication of novel EMI shielding materials.
FIBERS AND POLYMERS
(2023)
Article
Environmental Sciences
Rui Liu, Huan-Huan Yang, Hao Zhou, Xianliang Yi, Yang Liu
Summary: This study investigated the feasibility of MnO2 materials as particulate matter (PM) filtering media and clarified the effect of crystal structure on PM filtration. MnO2 with tunnel structure exhibited enhanced PM removal efficiencies compared to layered delta-MnO2.
JOURNAL OF ENVIRONMENTAL SCIENCES
(2023)
Article
Materials Science, Characterization & Testing
Yingping Wan, Amjad Farooq, Yi Sun, Fan Bu, Hui Zhang, Zongqian Wang
Summary: This study has developed a novel method to accurately categorize the types and content of stains in down raw materials. The method, named one blow and two washes, was successfully used to distinguish stain categories of different sources of down raw material with high reliability and good reproducibility.
Article
Nuclear Science & Technology
Jawaria Ahad, Amjad Farooq, Masroor Ahmad, Khalid Waheed, Kamran Rasheed Qureshi, Waseem Siddique, Naseem Irfan
Summary: Different experiments were conducted in a lab scale FCVS setup to understand the mechanism of wet scrubbing and improve the efficiency of iodine removal. Results showed that the decontamination factor was mainly influenced by gas flowrate and liquid level height. Decreasing the bubble diameter by increasing gas velocity enhanced mass transfer and removal efficiency, achieving over 99.9% removal efficiency.
PROGRESS IN NUCLEAR ENERGY
(2023)
Article
Engineering, Chemical
Qi Song, Yihua Li, Wancen Xie, Changfei Gao, Lifen Liu, Baicang Liu
Summary: In this study, an electro-Fenton coupled membrane filtration system was constructed to efficiently degrade micromolecular carbamazepine (CBZ) in aquatic environment. The system involved a composite cathode membrane that filtered out humic acid while allowing CBZ to pass through, followed by an EF process using a magnetic Fe@PC catalyst to degrade CBZ with high efficiency.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Nanoscience & Nanotechnology
Mengdie Hou, Mengjun Xu, Jiangtao Xu, Jiafeng Lu, Yi An, Liangjin Huang, Xianglong Zeng, Fufei Pang, Jun Li, Lilin Yi
Summary: We demonstrate the first simulation and experimental realization of decomposing cylindrical vector (CV) and orbital angular momentum (OAM) modes by reconstructing multi-view images of the projected intensity distribution. The use of deep learning-based stochastic parallel gradient descent (SPGD) algorithm allows for the retrieval of modal coefficients and optical field distributions with high efficiency and accuracy. The generated donut modes are experimentally decomposed into CV and OAM modes, with a purity of 99.5% for CV modes. Rapid switching of vortex modes is achieved by electrically driving the polarization controller. Our findings provide a convenient way to characterize and deepen the understanding of CV or OAM modes, with potential applications in information coding and quantum computation.
Article
Chemistry, Physical
Jun Wang, Jingjing Zhan, Hao Zhou, Xianliang Yi, Yang Liu
Summary: Tourmaline-LiCoO2 composites were synthesized and found to have high adsorption capacity for Pb2+. The optimal conditions for Pb2+ adsorption were determined to be 0.375 g tourmaline addition and sintering at 800 degrees C. The adsorption behavior of TM0.375LCO800 was influenced by solution pH and foreign cations, with Cu2+ and Zn2+ having the largest effect. XRD, ATR, SEM, TEM, UV-vis DRS, and XPS analysis revealed the physicochemical properties of the composites. The high-temperature transformation of tourmaline and LiCoO2 promoted Pb2+ removal. This study highlights the potential of tourmaline-LiCoO2 composites for heavy metal ion removal and provides scientific insights for future environmental applications.
APPLIED SURFACE SCIENCE
(2023)
Article
Biotechnology & Applied Microbiology
Yukuan Duan, Chen Wang, Shilong Yang, Lifen Liu
Summary: Researchers doped single metal atom Co into the Z-type heterojunction of photocatalysts, which further enhanced their synergistic activity. The optimal Co doping at 0.2 wt% in the 10 wt% g-C3N4/Bi2WO6 heterojunction showed the highest efficiency in degrading RhB (at a concentration of 100 mg/L) under visible light irradiation (99.7% degradation in 30 min, kinetic rate constant 0.182 min(-1)). This single-atom doped catalyst (Co/g-C3N4/Bi2WO6) exhibited remarkable performance in treating practical wastewater in EC-MFC system (96% COD removal and 92.8% TOC removal).
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2023)
Article
Engineering, Environmental
Qian Zhang, Lifen Liu
Summary: Integrating filtration membrane cathode and packed granular carbon cathode in an up-flow bio-electrochemical reactor can maintain both higher-level treatment capacity and electricity generation in the microbial fuel cell (MFC). Scale-ups via unit stacking (U-S) or size-enlarged reactor/electrode (SE-RE) were tested on a Nylon wastewater, achieving high removal efficiencies of nitrogen compounds and COD, as well as significant power generation. Adjusting influent C/N with urea enhanced the COD removal and reduced membrane fouling, making U-S scale-up with urea dosage feasible for practical application in MFC treating Nylon wastewater.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Review
Chemistry, Inorganic & Nuclear
Teng Li, Xuefeng Ren, Lifen Liu
Summary: This article summarizes and investigates the progress in the research of single-atom catalysts (SACs) in environmental applications and energy field. SACs have shown great potential in advanced oxidation processes, photocatalysis and photo-electrochemical systems, as well as fuel cells, with their performance depending on the metal element, support substrate, and coordination status shaped in preparation.
INORGANICA CHIMICA ACTA
(2024)
