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Trophic transfer of carbon-14 from algae to zebrafish leads to its blending in biomolecules and the dysregulation of metabolism via isotope effect

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National Science Review 2025年第1期12卷 155-166页

作者： Shipeng Dong Renquan Deng Hang Zeng Pengfei Xue Sijie Lin Dongmei Zhou Liang Mao State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Chemistry and Biomedicine Innovation Center Nanjing University College of Environmental Science & Engineering State Key Laboratory of Pollution Control and Resource Reuse Tongji University

Carbon-14（C-14） has been a major contributor to the human radioactive exposure dose,as it is released into the environment from the nuclear industry in larger quantities compared to other *** most abundant nuclide enters the biosphere as organically bound C-14（OBC-14）,posing a potential threat to public ***,it remains unknown how this relatively low radiotoxic nuclide induces health risks via chemical effects,such as isotope *** establishing a trophic transfer model involving algae（Scenedesmus obliquus）,daphnia（Daphnia magna） and zebrafish（Danio rerio）,we demonstrate that rapid incorporation and transformation of inorganic C-14 by algae into OB C-14 facilitates the blending of C-14 into the biomolecules of *** find that internalized C-14 is persistently retained in the brain of zebrafish,affecting DNA methylation and causing alterations in *** isotope tracing metabolomics with C-14 exposure further reveals the involvement of C-14 in various critical metabolic pathways,including one-carbon metabolism and nucleotide *** thus characterize the kinetic isotope effects for12C/14C in the key reactions of these metabolic pathways through kinetic experiments and density functional theory computations,showing that the isotopic substitution of carbon in bio chemicals regulates metabolism by disrupting reaction ratios via isotope *** results suggest that inorganic C-14discharged by the nuclear industry can be biotransformed into OBC-14 to impact metabolism via isotope effects,providing new insights into understanding the health risk of C-14,which is traditionally considered as a low radiotoxic nuclide.

关键词： organically bound carbon-14 trophic transfer isotope effects metabolism dysregulation isotopic substitution

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Scientific and technological innovations of wastewater treatment in China

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Frontiers of Environmental Science & Engineering 2024年第6期18卷 43-48页

作者： Hui Huang Rui Ma Hongqiang Ren State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210023China

The“dual-carbon”strategy promotes the development of the wastewater treatment sector and is an important tool for leading science and technology *** on the global climate change and the new policies introduced by China,this paper described the new needs for the development of wastewater treatment science and *** offered a retrospective analysis of the historical trajectory of scientific and technological advancements in this *** bibliometrics,it delineated the research hotspots within wastewater treatment,notably highlighting materials genomics,artificial intelligence,and synthetic ***,it posited that,in the future,the field of wastewater treatment should follow the paths of technological innovations with multi-dimensional needs,such as carbon reduction,pollution reduction,health,standardisation,and *** purpose of this paper was to provide references and suggestions for scientific and technological innovations in the field of wastewater treatment,and to contribute to the common endeavor of moving toward a pollution-Free Planet.

关键词： Wastewater treatment Dual-carbon strategy Technological innovation Carbon reduction

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Catalytic detoxification of mitoxantrone by graphitic carbon nitride(g-C_(3)N_(4))supported Fe/Pd bimetallic nanoparticles

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Journal of Environmental Sciences 2025年第2期148卷 614-624页

作者： Qianyu Xu Haoyang Fu Jiyuan Gu Liyu Lei Lan Ling State Key Laboratory for Pollution Control and Resource Reuse College of Environmental Science and EngineeringTongji UniversityShanghai 200092China

The overuse of antibiotics and antitumor drugs has resulted in more and more extensive pollution of water bodies with organic drugs,causing detrimental ecological effects,which have attracted attention towards effective and sustainable methods for antibiotics and antitumor drug ***,the hybrid nanomaterial(g-C_(3)N_(4)@Fe/Pd)was synthesized and used to remove a kind of both an antibiotic and antitumor drug named mitoxantrone(MTX)with 92.0%removal efficiency,and the MTX removal capacity is 450 mg/*** exposing to the hybrid material the MTX aqueous solution changed color from dark blue to lighter progressively,and LC-UV results of residual solutions showthat a newpeak at 3.0min(MTX:13.2min)after removal by g-C_(3)N_(4)@Fe/Pd appears,with the simultaneous detection of intermediate products indicating that g-C_(3)N_(4)@Fe/Pd indeed degrades *** mass spectrometric analysis suggests that the nuclear mass ratio decreased from 445.2(M+1H)to 126.0(M+1H),169.1(M+1H),239.2(M+1H),267.3(M+1H),285.2(M+1H),371.4(M+1H)and 415.2(M+1H),and the maximum proportion(5.63%)substance of all degradation products(126.0(M+1H))is 40-100 times less toxic than MTX.A mechanism for the removal and degradation of mitoxantrone was ***,actual water experiments confirmed that the maximum removal capacity of MTX by g-C_(3)N_(4)@Fe/Pd is up to 492.4 mg/g(0.02 g/L,10 ppm).

关键词： Degradation LC-QTOF-MS Nanoparticles Mitoxantrone Aqueous solution

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Preparation and photocatalytic performance study of dual Z-scheme Bi_(2)Zr_(2)O_(7)/g-C_(3)N4/Ag_(3)PO_(4) for removal of antibiotics by visible-light

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Journal of Environmental Sciences 2023年第3期125卷 349-361页

作者： Zhengjun Qu Zhenyang Jing Xiaoming Chen Zexiang Wang Hongfei Ren Lihui Huang Shandong Key Laboratory of Water Pollution Control and Resource Reuse School of Environmental Science and EngineeringShandong UniversityQingdao 266237China

At present,the high re-combination rate of photogenerated carriers and the low redox capability of the photocatalyst are two factors that severely limit the improvement of photocatalytic ***,a dual Z-scheme photocatalyst bismuthzirconate/graphitic carbon nitride/silver phosphate (Bi_(2)Zr_(2)O_(7)/g-C_(3)N4/Ag_(3)PO_(4)(BCA)) was synthesized using a co-precipitation method,and a dual Z-scheme heterojunction photocatalytic system was established to decrease the high re-combination rate of photogenerated carriers and consequently improve the photocatalytic *** re-combination of electron-hole pairs(e-and h+) in the valence band (VB) of g-C_(3)N4increases the redox potential of e-and h+,leading to significant improvements in the redox capability of the photocatalyst and the efficiency of e--h+*** a photosensitizer,Ag_(3)PO_(4)can enhance the visible light absorption capacity of the *** prepared photocatalyst showed strong stability,which was attributed to the efficient suppression of photo-corrosion of Ag_(3)PO_(4)by transferring the e-to the VB of g-C_(3)*** was degraded efficiently by BCA-10%(the BCA with 10 wt.%of AgPO_(4)) under visible light,and the degradation efficiency was up to 86.2%.This study experimentally suggested that the BCA photocatalyst has broad application prospects in removing antibiotic pollution.

关键词： Photocatalysis Bi_(2)Zr_(2)O_(7)/g-C_(3)N4/Ag_(3)PO_(4) Dual Z-scheme photocatalytic system Visible light Tetracycline

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Fabrication of straw-based graphene aerogels for oil/water separation: the effects of crude fiber fractions in straw

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Environmental Science and pollution Research 2025年第1期32卷 43-55页

作者： Dan, Hongbing Gao, Yue Wei, Xianxiao Yue, Qinyan Gao, Baoyu Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse School of Environmental Science and Engineering Shandong University Jinan250100 China

Benefiting from its abundance, eco-friendliness, and sustainability, crop straw is considered a promising candidate combined with graphene oxide (GO) to fabricate straw-based graphene aerogels (SGAs) for oil/water separation. However, considering the complex composition of straw, the roles played by different crude fibers in straw in the formation of SGAs are still unclear. Herein, wheat straw (WS) was used in this work and pretreated with acid and alkali to regulate its crude fiber fractions. Then, it was crosslinked with GO to fabricate various SGAs for comparing their differences in the formation, structure, and oil/water separation performance. Results indicated that acid can remove plentiful hemicellulose from the WS (from 29.9 ± 2.1 to 7.0 ± 0.8 wt%) while retaining most lignin and cellulose;alkali can retain cellulose (from 32.4 ± 3.6 to 70.6 ± 1.3 wt%) while greatly removing lignin and hemicellulose. Ascribed to high BET surface area and porous structure, the graphene aerogels formed by acid-/alkali-treated WS demonstrated superior oil absorption capacity (AC-WSGA: 62.3–126.0 g/g and AL-WSGA: 66.3–125.2 g/g). The poor mechanical compressibility of AC-WSGA was caused by the high lignin residue (16.2 ± 0.7 wt%) in AC-WS. The maximum compressive stress for AL-WSGA under 60% strain was 1.6 kPa, ensuring it achieved recoverable oil-absorbing properties by extrusion. The above findings suggested that cellulose and hemicellulose in straw contributed to the formation of SGAs with abundant porous and compressible architecture, whereas the presence of lignin greatly increased the brittleness of SGAs and decreased their oil removal and recycling performances. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2024.

关键词： Aerogels

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Plasmid-mediated transfer of antibiotic resistance genes and biofilm formation in a simulated drinking water distribution system under chlorine pressure

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Journal of Environmental Sciences 2025年第6期152卷 376-388页

作者： Yexing Wang Yingyu Zhang Xiuneng Zhu Yulin Tang Yongji Zhang State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and EngineeringTongji UniversityShanghai 200092China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China

The effects of disinfectants and plasmid-based antibiotic resistance genes(ARGs)on the growth of microorganisms and the plasmid-mediated transfer of ARGs in the water and biofilm of the drinkingwater distribution system under simulated conditionswere *** heterotrophic plate count of the water in reactors with 0.1 mg/L NaClO and NH_(2)Cl was higher than in the control *** no similar phenomenon in *** thewater of reactors containing NaClO,the aphA and bla geneswere lower than in the antibiotic resistant bacteria group,while both genes were higher in the water of reactors with NH_(2)Cl than in the control *** may promote the transfer of ARGs in the water *** genes in the biofilm of the reactors containing chlorine were lower than the control *** analysis between ARGs and water quality parameters revealed that the copy numbers of the aphA gene were significantly positively correlated with the copy numbers of the bla gene in water and significantly negatively correlated in biofilm(p<0.05).The results of the sequencing assay showed that bacteria in the biofilm,in the presence of disinfectant,were primarily Gram-negative.1.0 mg/L chlorine decreased the diversity of the community in the *** relative abundance of some bacteria that may undergo transfer increased in the biofilm of the reactor containing 0.1 mg/L chlorine.

关键词： Disinfectant Antibiotic resistance genes(ARGs) Heterotrophic plate count(HPC) Drinking water distribution system Biofilm

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Nanoscale zero-valent iron integrated with bioreactor for recalcitrant antimony-Congo red dyeing wastewater treatment

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Progress in Natural Science:Materials International 2023年第5期33卷 569-574页

作者： Jing Liu Airong Liu Yi Wei Jiahui Fu Wei-xian Zhang State Key Laboratory for Pollution Control and Resource Reuse College of Environmental Science and Engineering Tongji University

Antimony（Sb） and recalcitrant organic dyes often coexist in dyeing wastewater, and the simultaneous removal of Sb and dyes has been a challenge for traditional biological method in the treatment of Sb-dyeing *** zero-valent iron（n ZVI） is particularly suitable for separating heavy metals and enhancing the biodegradability of recalcitrant organic compounds. Herein, n ZVI is integrated with bioreactors（n ZVI-bio system） to achieve enhanced removal of Sb and degradation of Congo red（CR） in wastewater. The n ZVI-bio system achieves a reduction in Sb levels from 2.5 g L-1to 0.064 mg L-1, with a color removal efficiency of up to 98.60 % and a reduction in COD from 167 mg L-1to 55 mg L-1. The excellent performance is mainly attributed to n ZVI pretreatment, which removes Sb and degrades CR into smaller and more biodegradable organic compounds,providing favorable environmental conditions for the subsequent biotreatment system. This suggests that integrated n ZVI-bio system has potential for the treatment of complex wastewater containing heavy metals and recalcitrant organic dyes.

关键词： Nanoscale zero-valent iron Biotreatment Antimony Congo red nZVI-bio system

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A review of CFD simulation in pressure driven membrane with fouling model and anti-fouling strategy

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Frontiers of Environmental Science & Engineering 2024年第8期18卷 1-29页

作者： Shiyong Miao Jiaying Ma Xuefei Zhou Yalei Zhang Huaqiang Chu State Key Laboratory of Pollution Control and Resource Reuse Tongji UniversityShanghai 200092China Shanghai Institute of Pollution Control and Ecological Security Tongji UniversityShanghai 200092China

Pressure-driven membrane filtration systems are widely utilized in wastewater treatment,desalination,and water reclamation and have received extensive attention from *** fluid dynamics(CFD)offers a convenient approach for conducting mechanistic studies of flow and mass transfer characteristics in pressure-driven *** a signature phenomenon in membrane systems,the concentration polarization that accompanies the permeation process is a key factor in membrane performance degradation and membrane fouling *** fouling models(scaling,biofouling and colloidal particle fouling)based on CFD theory have been constructed,and considerable research has been *** representative antifouling strategies with special simulation methods,including patterned membranes,vibration membranes,rotation membranes,and pulsatile flows,have also been *** studies should focus on refining fouling models while considering local hydrodynamic characteristics;experimental observation tools focusing on the internal structure of inhomogeneous fouling layers;techno-economic model of antifouling strategies such as vibrational,rotational and pulsatile flows;and unfavorable hydraulic phenomena induced by rapidly changing flows in simulations.

关键词： Computational fluid dynamics Membrane Fouling model Concentration polarization

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control strategies for disinfection byproducts by ion exchange resin,nanofiltration and their sequential combination

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Frontiers of Environmental Science & Engineering 2023年第10期17卷 89-101页

作者： Yufeng Liao Mengmeng Tang Mengyuan Li Peng Shi Aimin Li Yangyang Zhang Yang Pan State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210023China

Disinfection byproducts (DBPs) are emerging pollutants in drinking water with high health risks. Precursor reduction before disinfection is an effective strategy to control the formation of DBPs. In this study, three types of anion exchange resins (AERs) and two types of nanofiltration (NF) membranes were tested for their control effects on DBP precursors, DBPs, and total organic halogen (TOX). The results showed that, for AER adsorption, the removal efficiencies of DBP precursors, DBPs, and TOX increased with the increase of resin dose, and the strong basic macroporous anion exchange resin (M500MB) had the highest removal efficiencies. For NF, the highest removal efficiencies were achieved at an operating pressure of 4 bar, and the membrane (NF90) with a smaller molecular weight cut-off, had a better control efficiency. However, AER adsorption was inefficient in removing dissolved organic carbon (DOC);NF was inefficient in removing Br− resulting in insufficient control of Br-DBPs. Accordingly, a sequential approach of AER (M500MB) adsorption followed by NF (NF90) was developed to enhance the control efficiency of DBPs. Compared with single AER adsorption and single NF, the sequential approach further increased the removal efficiencies of DOC by 19.4%–101.9%, coupled with the high Br− removal efficiency of 92%, and thus improved the reduction of cyclic DBPs and TOX by 3.5%–4.9%, and 2.4%–8.4%, respectively;the sequential approach also reduced the cytotoxicity of the water sample by 66.4%.

关键词： Disinfection byproducts control Anion exchange resin Nanofiltration Cytotoxicity

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Insight into phase structure-dependent soot oxidation activity of K/MnO_(2) catalyst

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Journal of Environmental Sciences 2023年第4期126卷 668-682页

作者： Changlong Zheng Shidong Bao Danjun Mao Zhaoyi Xu Shourong Zheng State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210023China

In the present study,two nanosized MnO_(2)with β and δ phase structures and potassium loaded MnO_(2)catalysts with varied K loading amounts (denoted as K/MnO_(2)) were *** programmed oxidation and isothermal reactions in loose contact modes were employed to examine the soot oxidation activity of the as-prepared *** results show that as compared with β-MnO_(2),δ-MnO_(2)has larger surface area and higher content of hydroxyl *** K loading,abundant hydroxyl groups in δ-MnO_(2)effectively sequestrate K cation to form bound K species and free K species are available only at K loading above 3.0 wt.%.In contrast,the majority of K species present as free state in β-MnO_(2)even at a K loading of 1.0 wt.%due to its very low hydroxyl group *** O_(2)temperature-programmed desorption (O_(2)-TPD) demonstrates that the catalysts with free K species exhibit strong ability in activating gaseous O_(2),whereas the catalysts only having bound K display minor O_(2)activation *** a result,despite of slightly lower activity of β-MnO_(2)than δ-MnO_(2),the K/β-MnO_(2)catalysts exhibit substantially higher activities than K/δ-MnO_(2)catalysts with identical K *** finding in this study clearly demonstrates that for MnO_(2)based catalysts,the enhancement of catalytic activity for soot oxidation is highly K loading amount dependent and the dependency is strongly associated with the phase structure of MnO_(2).

关键词： Phase structure Surface hydroxyl group K/MnO_(2)catalysts K species Soot oxidation

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