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Integrated analysis of using high-value microalgae for tetracycline treatment with biomass utilization: Responses, removal pathway, physiological and metabolomic characterization

Water Cycle

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water Cycle 2025年

作者： Yaqian Yuan Zeyuan Wang Ganlin Hu Yu Hong Beijing Key Lab for Source Control Technology of Water Pollution College of Environmental Science and Engineering Beijing Forestry University Beijing 100083 China Engineering Research Center for Water Pollution Source Control & Eco-Remediation College of Environmental Science and Engineering Beijing Forestry University Beijing 100083 China Hebei Key Laboratory for Emerging Contaminants Control and Risk Management College of Environmental Science and Engineering Beijing Forestry University Beijing 100083 China

Antibiotic-contaminated wastewater poses serious threats to the ecological environment. While using microalgae for antibiotic removal has been extensively studied, this study provides a comprehensive and integrated analysis of the physiological and metabolic response mechanisms of Chlorella sp. HL to tetracycline (TC). The results showed that Chlorella sp. HL exhibited strong TC resistance and high removal efficiencies (98.63–99.95%). Low TC concentrations (<10 mg/L) promoted microalgal growth, while higher concentrations (>20 mg/L) inhibited its growth. Pigment contents (chlorophyll a, chlorophyll b, and carotenoids) generally increased under the stimulation of TC, except for carotenoids at 1 mg/L TC. The photosynthetic activity of Chlorella sp. HL was significantly affected, and it was reduced at higher concentrations of TC. Antioxidant enzyme activities and malondialdehyde (MDA) content increased with TC concentration, indicating TC could cause oxidative stress. In addition, TC altered the high-value substance contents of Chlorella sp. HL, with protein and lipid contents initially declining but subsequently increasing, while polysaccharide content gradually rose. Metabolomic analysis indicated that Chlorella sp. HL responded to TC stress by regulating carbohydrate metabolism and other pathways. This study provides an integrated analysis of the physiological, biochemical, and metabolomic responses of microalgae to TC. This comprehensive analysis provides new insights into how microalgae adapt to and mitigate TC stress, and especially revealing its metabolic response mechanism to TC. In addition, the potential for utilizing microalgal biomass for high-value products production when removing antibiotics has been investigated. This dual focus on bioremediation and resource production is a novel research direction.

关键词： Tetracycline Microalgae Photosynthesis Biochemical composition Metabolic pathways

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Dimension-controlled synthesis of BiOI for efficient visible light photodegradation of tetracycline: role of pore structure

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Environmental Science and pollution Research 2024年第20期31卷 29101-29112页

作者： Gao, Peng Qiu, Nanting Feng, Li Zhang, Liqiu Beijing Key Lab for Source Control Technology of Water Pollution College of Environmental Science and Engineering Beijing Forestry University Beijing100083 China Engineering Research Center for Water Pollution Source Control & amp Eco-Remediation College of Environmental Science and Engineering Beijing Forestry University Beijing100083 China

The transformation of photogenerated charge carriers (PC) in variable dimensional photocatalyst plays a pivotal role in unraveling the generation of reactive species (RS). However, the dimensional structure–activity relationship in photocatalysis remains elusive, with limited insights into its intricacies. Herein, we report a controlled synthesis strategy by using polyvinyl pyrrolidone (PVP)-assisted precipitation method for BiOI photocatalyst. Due to the steric hindrance of PVP, the 3D microsphere (3D-PVP0.5) and porous structure (3D-PVP1) of BiOI catalysts have been successfully prepared at room temperature. The 3D-PVP1 photocatalyst contains abundant mesopores and larger pores, which significantly shorten the diffusion distance of PC. Also, these PC in porous structure is beneficial for transferring from the inner phase to the surface of materials. Combined with optical property and radicals trapping experiments, the recombination rate of PC in porous structure performs a significant decrease, leading to the generation of more dominated ROS (•O2− and h+). The •O2− played a dominated role (86.98% of contribution rate) in photodegradation of tetracycline (TC) in 3D-PVP1 photocatalytic process. Compared with 2D nanosheet of BiOI (16.7% removal rate of TC), the as-prepared 3D porous structure of BiOI catalyst exhibits unique stable and high removal capacities (90.5%) for TC photodegradation under visible light irradiation. The kobs of 3D-PVP1 photocatalyst increased by 5.1 times than that of 2D nanosheet. To investigate its practical application, the effects of inorganic anions and pH have been systematically studied. This work sheds light on the design of variable dimension BiOI catalyst and provides more insight into the transfer mechanism of PC. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2024.

关键词： Bismuth compounds

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Highly efficient P uptake by Fe3O4 loaded amorphous Zr-La (carbonate) oxides: Electrostatic attraction, inner-sphere complexation and oxygen vacancies acceleration effect

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Journal of Environmental Sciences 2022年第10期34卷 18-29页

作者： Chenyang Liu Yili Wang Xiaolin Li Junyi Li Shuoxun Dong Haotian Hao Yao Tong Yanqing Zhou College of Environmental Science and Engineering Beijing Key Lab for Source Control Technology of Water PollutionBeijing Forestry UniversityBeijing 100083China Center for Water and Ecology State Key Joint Laboratory of Environment Simulation and Pollution ControlSchool of EnvironmentTsinghua UniversityBeijing 100084China Research Center for Eco-Environmental Sciences Chinese Academy of SciencesBeijing 100085China

Bimetallic oxides composites have received an increasing attention as promising adsorbents for aqueous phosphate (P) removal in recent years. In this study, a novel magnetic composite MZLCO was prepared by hybridizing amorphous Zr-La (carbonate) oxides (ZLCO) with nano-FeOthrough a one-pot solvothermal method for efficient phosphate adsorption. Our optimum sample of MZLCO-45 exhibited a high Langmuir maximum adsorption capacity of 96.16 mg P/g and performed well even at low phosphate concentration. The phosphate adsorption kinetics by MZLCO-45 fitted well with the pseudo-second-order model, and the adsorption capacity could reach 79% of the ultimate value within the first 60 min. The phosphate adsorption process was highly p H-dependent, and MZLCO-45 performed well over a wide p H range of 2.0-8.0. Moreover, MZLCO-45 showed a strong selectivity to phosphate in the presence of competing ions (Cl^(-), NO_(3)^(-), SO_(4)^(2-), HCO_(3)^(-), Ca^(2+), and Mg^(2+)) and a good reusability using the eluent of Na OH/Na Cl mixture, then 64% adsorption capacity remained after ten recycles. The initial 2.0 mg P/L in municipal wastewater and surface water could be efficiently reduced to below 0.1mg P/L by 0.07 g/L MZLCO-45, and the phosphate removal efficiencies were 95.7% and 96.21%, respectively. Phosphate adsorption mechanisms by MZLCO-45 could be attributed to electrostatic attraction and the inner-sphere complexation via ligand exchange forming Zr/La-O-P, -OH and CO_(3)^(2-)groups on MZLCO-45 surface played important roles in the ligand exchange process. The existence of oxygen vacancies could accelerate the phosphate absorption rate of the MZLCO-45 composites.

关键词： Fe3O4 loaded amorphous Zr-La(carbonate)oxides Phosphate adsorption performance Regeneration Mechanism Real water treatment

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Nitrate removal from aqueous solutions by magnetic cationic hydrogel:Effect of electrostatic adsorption and mechanism

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Journal of Environmental Sciences 2020年第5期32卷 177-188页

作者： Junyi Li Shuoxun Dong Yili Wang Xiaomin Dou Haotian Hao College of Environmental Science and Engineering Beijing Key Lab for Source Control Technology of Water PollutionBeijing Forestry UniversityBeijing 100083China Center for Water and Ecology State Key Joint Laboratory of Environment Simulation and Pollution ControlSchool of EnvironmentTsinghua UniversityBeijing 100084China Research Center for Eco-Environmental Sciences Chinese Academy of SciencesBeijing 100085China

Excessive nitrate(NO3-)is among the most problematic surface water and groundwater *** this study,a type of magnetic cationic hydrogel(MCH)is employed for NO3-adsorption and well characterized *** adsorption capacity is considerably pHdependent and achieves the optimal adsorption(maximum NO3--adsorption capacity is95.88±1.24 mg/g)when the pH level is *** fitting result using the homogeneous surface diffusion model indicates that the surface/film diffusion controls the adsorption rate,and NO3-approaches the center of MCH particles within 30 *** diffusion coefficient(Ds)and external mass transfer coefficient(kF)in the liquid phase are1.15×10-6 cm2/min and 4.5×10-6 cm/min,*** MCH is employed to treat surface water that contains 10 mg/L of NO3-,and it is found that the optimal magnetic separation time is 1.6 *** high-efficiency mass transfer and magnetic separation of MCH during the adsorption-regeneration process favors its application in surface water ***,the study of the mechanism involved reveals that both-N+(CH3)3 groups and NO3-are convoluted in adsorption via electrostatic *** is further found that ion exchange between NO3-and chlorine occurs.

关键词： Adsorption Nitrate removal Low concentration Electrical stern layer Magnetic cationic hydrogel

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Catalytic ozonation for the removal of methyl orange in water using iron-coated Moringa oleifera seeds husk

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Process Safety and Environmental Protection 2025年 199卷

作者： Ikhlaq, Amir Nawab, Hira Yasar, Abdullah Naeem, Asma Akram, Asia Qazi, Umair Yaqub Qi, Fei Javaid, Rahat Institute of Environmental Engineering University of Engineering and Technology Lahore54890 Pakistan Sustainable Development Study Center Government College University Lahore Pakistan Department of Chemistry University of Management and Technology Johar Town Lahore54770 Pakistan Department of Chemistry Benedict College 1600 Harden Street ColumbiaSC29204 United States Beijing Key Lab for Source Control Technology of Water Pollution College of Environmental Science and Engineering Beijing Forestry University Beijing100083 China Molinaroli College of Engineering and Computing University of South Carolina ColumbiaSC29208 United States

In the current study, a novel agricultural-based green catalyst, i.e., iron-coated Moringa oleifera seeds husk (Fe-MOSH), was synthesized for its innovative usage in the catalytic ozonation process (Fe-MOSH/O3) to remove methyl orange (MO) containing wastewater. Fe-MOSH was characterized by FTIR, BET, and SEM-EDS. Fe-MOSH was then used for the treatment of MO in a catalytic ozonation reactor, and its performance was optimized concerning several operational parameters, i.e., reaction time, pH, ozone dosage, and catalyst dose. The results demonstrated that Fe-MOSH/O3 was much more efficient than the simple ozonation process at removing MO, as the removal efficiency elevated from 60 % to 85 % under neutral pH, and an improvement in the reduction of COD from 73 % to 86 %. The radical scavenger effect revealed the leading role of hydroxyl radicals in dye degradation by decreasing the removal efficiency of MO from 60 % and 85–33 % and 63 % in the ozonation and Fe-MOSH/O3 processes, respectively. The catalyst's stability was also demonstrated by achieving 79 % MO removal even after the 3rd run of reuse, i.e., only a 7.5 % reduction in activity. Therefore, the results exhibit that the unique Fe-MOSH/O3 process is highly efficient for the removal of MO in water, with positive implications for industrial applications. © 2025

关键词： Ozonization

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One representative water supply system in China with nitrosamine concern: Challenges and treatment strategies

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Journal of Environmental Sciences 2020年第2期32卷 12-20页

作者： Yu Qiu Er Bei Yufang Wang Jun Wang Xiaojian Zhang Chao Chen State Key Joint Laboratory of Environmental Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China Beijing Key Lab for Source Control Technology of Water Pollution College of Environmental Science and EngineeringBeijing Forestry UniversityBeijing 100083China Research Institute for Environmental Innovation(Suzhou) TsinghuaSuzhou 215163China

Four sampling campaigns were conducted in two years to understand the fluctuation of N-Nitrosamines(NAs) and their precursors in one drinking water treatment plant(DWTP) in East China in different *** water supply system has been facing several nitrosamine challenges related with source water, including the switch of water source,high concentration of ammonium, formed NAs and NA formation potential(FP) in source ***, the use of ozonation in the DWTP and chloramination in networks will increase the NDMA concentration in tap *** address these challenges, the biopretreatment was applied in this DWTP to decrease the concentration of ammonium and *** following biological activated carbon(BAC) will neutralize the nitrosamine increase brought by *** use of free chlorine in disinfection process will also decrease the NDMA formation compared with *** results will benefit other cities in China and other countries with similar impacted water sources.

关键词： Drinking water treatment plant Formation potential Networks N-Nitrosamines Precursor

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Effect of nitrogen/phosphorus concentration on algal organic matter generation of the diatom Nitzschia palea:Total indicators and spectroscopic characterization

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Journal of Environmental Sciences 2016年第9期28卷 130-142页

作者： Linlin Han Bingbing Xu Fei Qi Zhonglin Chen Beijing Key Laboratory for Source Control Technology of Water Pollution College of Environmental Science and EngineeringBeijing Forestry University State Key Laboratory of the Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental Sciences State Key Laboratory of Urban Water Resource and Environment Harbin Institute of Technology

Critical algal blooms in great lakes increase the level of algal organic matters（AOMs）,significantly altering the composition of natural organic matters（NOMs） in freshwater of *** study examined the AOM＇s characteristics of Nitzschia palea（***）,one kind of the predominant diatom and an important biomarker of water quality in the great lakes of China,to investigate the effect of AOMs on the variation of NOMs in lakes and the process of algal ***–emission matrix fluorescence（EEM） spectroscopy,synchronous fluorescence（SF） spectroscopy and deconvolution UV–vis（D-UV） spectroscopy were utilized to characterize AOMs to study the effects of nutrient loading on the composition change of *** results,it was revealed that the phosphorus is the limiting factor for ***＇s growth and the generation of both total organic carbon and amino acids but the nitrogen is more important for the generation of carbohydrates and *** spectra revealed differences in the composition of extracellular organic matter and intracellular organic *** of the nitrogen and phosphorus concentrations,aromatic proteins and soluble microbial products were the main components,but the nitrogen concentration had a significant impact on their *** SF spectra were used to study the AOMs for the first time and identified that the protein-like substances were the major component of AOMs,creating as a result of aromatic group *** D-UV spectra showed carboxylic acid and esters were the main functional groups in the EOMs,with –OCH_3,–SO_2NH_2,–CN,–NH_2,–O– and –COCH_3functional groups substituting into benzene rings.

关键词： Extracellular organic matter Intracellular organic matter Nitzschia palea Fluorescence spectroscopy Deconvolution UV–vis spectroscopy

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Inhibitory effects of biofilms on the adsorption of per- and polyfluorinated alkyl substances by biological activated carbon in practical drinking water treatment plants

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Journal of Environmental Sciences 2025年

作者： Zixin Pan Zhenguo Qi Panyue Zhang Yao Zhang Wenxian Wang Xin Huang Baoyou Shi Beijing Key Lab for Source Control Technology of Water Pollution College of Environmental Science and Engineering Beijing Forestry University Beijing 100083 China Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China Jihongtan Reservoir Chengyang District Qingdao 266100 China

Although activated carbon filters are thought to be the best way to remove per- and polyfluorinated alkyl substances (PFAS), it is yet unknown how biofilms affect PFAS removal. This study first examined how the removal of PFAS in full-scale drinking water treatment plants (DWTPs) was impacted by biofilm from biological activated carbon (BAC) of varying depths and carbon ages. PFAS desorption from BAC was visible, but at this point, BAC could still remove dissolved organic matter (DOM) efficiently. Studies have demonstrated that the use of activated carbon filters can dramatically lower the content of PFAS in water, with the amount of PFAS reducing as the filter's depth grows and its use duration increases. Additionally, pore-clogging becomes more noticeable as the biofilm ages, which reduces BAC's capacity to eliminate PFAS and hinders PFAS desorption. Furthermore, the adsorption process of PFAS may be impeded by the secretion of biofilms, which are composed of proteins and polysaccharides. Based on the analysis above, it can be the adsorption of PFAS by BAC is significantly inhibited by biofilms, according to another research. This provides theoretical direction for improving the removal effectiveness of PFAS in DWTPs.

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Improving real-time forecasting of bay water quality by integrating in-situ monitoring, machining learning, and process-based modeling

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Journal of Environmental Management 2025年 386卷 125816页

作者： Xiong, Rui Xiong, Jianzhi Zheng, Yi Zhang, Jingjie Han, Feng Lu, Haiyan Zheng, Yan Key Laboratory of Water Security Guarantee in Guangdong-Hong Kong-Macao Greater Bay Area of Ministry of Water Resources Ministry of Water Resources of the People's Republic of China Guangzhou510611 China State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control School of Environmental Science and Engineering Southern University of Science and Technology Shenzhen518055 China Eco-Environmental Monitoring and Research Center Pearl River Valley and South China Sea Ecology and Environment Administration Ministry of Ecology and Environment of the People's Republic of China Guangzhou510611 China Shenzhen Municipal Engineering Lab of Environmental IoT Technologies Southern University of Science and Technology Guangdong Shenzhen China State Key Laboratory of Black Soils Conservation and Utilization Key Laboratory of Wetland Ecology and Environment Northeast Institute of Geography and Agroecology Chinese Academy of Sciences Changchun130102 China

Frequent occurrences of disasters such as red tides significantly threaten bay ecosystems, making near real-time water quality forecasting crucial for disaster warning and decision-making. Conventional techniques, such as process-based modeling and in-situ monitoring, struggle to achieve this for the entire bay region when applied independently. This study proposes a hybrid approach that integrates in-situ monitoring, process-based modeling, and machine learning (ML) to address this challenge. The feasibility of the approach was validated using Shenzhen Bay, a cross-boundary bay co-administered by Shenzhen and Hong Kong, as a testbed. ML models exhibited superior performance for location-specific forecasting, achieving Nash-Sutcliffe efficiency (NSE) values of 0.90, 0.84, 0.85, and 0.73 for dissolved oxygen, chlorophyll a, total nitrogen, and total phosphorus, respectively. Forecasting accuracy declined with longer lead times. Additionally, this study developed a dual-clustering method to optimize the selection of monitoring locations, minimizing the number of sites while effectively capturing the water quality across the entire bay. The results suggest that a monitoring network consisting of just two locations can adequately represent the overall water quality conditions within Shenzhen Bay. Using output from the Delft-3D model built for Shenzhen Bay, ML-based surrogate models successfully extended water quality forecasting from the two strategically selected locations to the entire bay area, with NSE values exceeding 0.8 in most regions. The hybrid approach provides a methodological foundation for achieving near real-time water quality forecasting across the entire bay areas, contributing to maintaining water security and preserving valuable ecosystem services in a rapidly changing environment. © 2025 Elsevier Ltd

关键词： In-situ monitoring Machine learning Process-based modeling Short-term forecasting Surrogate modeling water quality

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Deposition and release of clay colloids on alumina and natural organic matter surfaces via heterogeneous pathways

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Applied Clay Science 2025年 274卷

作者： Fu, Yuanqi Wang, Heng Yang, Zhenyu Liu, Liangke Jin, Xiaohu Huang, Yajing Wang, Xiaoyao Yi, Xiaoyun Dang, Zhi School of Environment and Energy South China University of Technology Guangzhou510006 China The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters Ministry of Education South China University of Technology Guangzhou510006 China College of Geographical Sciences Faculty of Geographical Science and Engineering Henan University Zhengzhou450046 China Guangdong Yuegang Water Supply Co. Ltd. Shenzhen518021 China

Clay colloids are ubiquitous on land and in aquatic environments. Because of their overall negative surface charge, the impact of surface charge heterogeneity has long been overlooked. In this work, we demonstrate that both the deposition and the release of montmorillonite colloids (MONTs) are influenced by surface charge heterogeneity, both on positively charged metal oxide (alumina) surfaces and negatively charged natural organic matter (NOM: humic acid and alginate) surfaces. Deposition trends show that MONTs has the highest attachment on alginate, due to the positive charge and rich hydroxyl functional groups at the edges of MONTs, as well as the coarser surface produced by the extended conformation of alginate macromolecules. At very low ionic strength (IS), MONTs can deposit onto alumina in a face-face adsorption manner due to electrostatic attraction, while no deposition occurs on NOM because of electrostatic repulsion. At high IS, the compression of the basal surface electrical double layer (EDL) exposes the edge EDL of the MONTs, leading to significant deposition on the NOM via the edge. In addition, on the MONT layer already deposited on the alumina surface, small particles of MONT also further deposit via the edge adsorption. When divalent ions are present, in addition to the EDL compression a cation bridge effect between the edges of the MONTs and the NOM surface occurs, thereby reducing release. These findings provide new insights into the study of the deposition behavior of charge-heterogeneous colloids, such as MONTs, in the environment. © 2025

关键词： Coulomb interactions

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