环境科学学报（英文版）/Journal Journal of Environmental SciencesCSCDCSTPCD北大核心EISCI
查看更多>>Journal of Environmental Sciences是由中国科学院生态环境研究中心主办的中国第一份环境科学方面的综合性英文版学术期刊，是我国在环境科学研究领域与国际交流的窗口。自1989年创刊以来受到了国际环境科学界的关注，目前已有四十余个国内外检索机构收录本刊内容，其中包括美国科学引文文摘扩展版（SCIE/web Science）和EI。36位海外编委参与本刊编委会工作，目前该杂志由中国科学出版社和荷兰IOS出版社联合发行，订户遍及世界各主要国家。
查看更多>>摘要：To better understand the migration behavior of plastic fragments in the environment,de-velopment of rapid non-destructive methods for in-situ identification and characterization of plastic fragments is necessary.However,most of the studies had focused only on col-ored plastic fragments,ignoring colorless plastic fragments and the effects of different en-vironmental media(backgrounds),thus underestimating their abundance.To address this issue,the present study used near-infrared spectroscopy to compare the identification of colored and colorless plastic fragments based on partial least squares-discriminant analy-sis(PLS-DA),extreme gradient boost,support vector machine and random forest classifier.The effects of polymer color,type,thickness,and background on the plastic fragments clas-sification were evaluated.PLS-DA presented the best and most stable outcome,with higher robustness and lower misclassification rate.All models frequently misinterpreted colorless plastic fragments and its background when the fragment thickness was less than 0.1mm.A two-stage modeling method,which first distinguishes the plastic types and then identifies colorless plastic fragments that had been misclassified as background,was proposed.The method presented an accuracy higher than 99％in different backgrounds.In summary,this study developed a novel method for rapid and synchronous identification of colored and colorless plastic fragments under complex environmental backgrounds.
查看更多>>摘要：Due to its high efficiency,Fe(Ⅱ)-based catalytic oxidation has been one of the most popu-lar types of technology for treating growing organic pollutants.A lot of chemical Fe sludge along with various refractory pollutants was concomitantly produced,which may cause sec-ondary environmental problems without proper disposal.We here innovatively proposed an effective method of achieving zero Fe sludge,reusing Fe resources(Fe recovery=100％)and advancing organics removal(final TOC removal＞70％)simultaneously,based on the in situ formation of magnetic Ca-Fe layered double hydroxide(Fe3O4@CaFe-LDH)nano-material.Cations(Ca2+and Fe3+)concentration(≥ 30 mmol/L)and their molar ratio(Ca:Fe ≥ 1.75)were crucial to the success of the method.Extrinsic nano Fe3O4 was designed to be in-volved in the Fe(Ⅱ)-catalytic wastewater treatment process,and was modified by oxida-tion intermediates/products(especially those with COO-structure),which promoted the co-precipitation of Ca2+(originated from Ca(OH)2 added after oxidation process)and by-produced Fe3+cations on its surface to in situ generate core-shell Fe3O4@CaFe-LDH.The oxidation products were further removed during Fe3O4@CaFe-LDH material formation via intercalation and adsorption.This method was applicable to many kinds of organic wastew-ater,such as bisphenol A,methyl orange,humics,and biogas slurry.The prepared magnetic and hierarchical CaFe-LDH nanocomposite material showed comparable application perfor-mance to the recently reported CaFe-LDHs.This work provides a new strategy for efficiently enhancing the efficiency and economy of Fe(Ⅱ)-catalyzed oxidative wastewater treatment by producing high value-added LDHs materials.
查看更多>>摘要：The multi-soil-layering(MSL)systems is an emerging solution for environmentally-friendly and cost-effective treatment of decentralized rural domestic wastewater.However,the role of the seemingly simple permeable layer has been overlooked,potentially holding the break-throughs or directions to addressing suboptimal nitrogen removal performance in MSL sys-tems.In this paper,the mechanism among diverse substrates(zeolite,green zeolite and bio-logical ceramsite)coupled microorganisms in different systems(activated bacterial powder and activated sludge)for rural domestic wastewater purification was investigated.The re-moval efficiencies performed by zeolite coupled with microorganisms within 3 days were 93.8％for COD,97.1％for TP,and 98.8％for NH4+-N.Notably,activated sludge showed bet-ter nitrification and comprehensive performance than specialized nitrifying bacteria pow-der.Zeolite attained an impressive 89.4％NH4+-N desorption efficiency,with a substantive fraction of NH4+-N manifesting as exchanged ammonium.High-throughput 16S rRNA gene sequencing revealed that aerobic and parthenogenetic anaerobic bacteria dominated the reactor,with anaerobic bacteria conspicuously absent.And the heterotrophic nitrification-aerobic denitrification(HN-AD)process was significant,with the presence of denitrifying phosphorus-accumulating organisms(DPAOs)for simultaneous nitrogen and phosphorus removal.This study not only raises awareness about the importance of the permeable layer and enhances comprehension of the HN-AD mechanism in MSL systems,but also provides valuable insights for optimizing MSL system construction,operation,and rural domestic wastewater treatment.
查看更多>>摘要：This study investigated environmental distribution and human exposure of polycyclic aro-matic hydrocarbons(PAHs)and their derivatives in one Chinese petroleum refinery facility.It was found that,following with high concentrations of 16 EPA PAHs(∑Parent-PAHs)in smelting subarea of studied petroleum refinery facility,total derivatives of PAHs[named as XPAHs,including nitro PAHs(NPAHs),chlorinated PAHs(Cl-PAHs),and brominated PAHs(Br-PAHs)]in gas(mean=1.57 × 104 ng/m3),total suspended particulate(TSP)(mean=4.33 × 103 ng/m3)and soil(mean=4.37 × 103 ng/g)in this subarea had 1.76-6.19 times higher levels than those from other subareas of this facility,surrounding residential ar-eas and reference areas,indicating that petroleum refining processes would lead apparent derivation of PAHs.Especially,compared with those in residential and reference areas,gas samples in the petrochemical areas had higher ENPAH/EPAHs(mean=2.18),but lower ECl-PAH/EPAHs(mean=1.43 × 10-1)and ∑Br-PAH/EPAHs ratios(mean=7.49 × 10-2),indicating the richer nitrification of PAHs than chlorination during petrochemical process.The occu-pational exposure to PAHs and XPAHs in this petroleum refinery facility were 24-343 times higher than non-occupational exposure,and the ILCR(1.04 × 10-4)for petrochemical work-ers was considered to be potential high risk.Furthermore,one expanded high-resolution screening through GC Orbitrap/MS was performed for soils from petrochemical area,and another 35 PAHs were found,including alkyl-PAHs,phenyl-PAHs and other species,indicat-ing that profiles and risks of PAHs analogs in petrochemical areas deserve further expanded investigation.
查看更多>>摘要：In the present study,we investigated the influence of surface fluorine(F)on TiO2 for the photocatalytic oxidation(PCO)of toluene.Ti02 modified with different F content was pre-pared and tested.It was found that with the increasing of F content,the toluene conversion rate first increased and then decreased.However,CO2 mineralization efficiency showed the opposite trend.Based on the characterizations,we revealed that F substitutes the surface hy-droxyl of TiO2 to form the structure of ≡Ti-F.The presence of the appropriate amount of sur-face ≡Ti-F on TiO2 greatly enhanced the separation of photogenerated carriers,which facil-itated the generation of·OH and promoted the activity for the PCO of toluene.It was further revealed that the increase of only OH promoted the conversion of toluene to ring-containing intermediates,causing the accumulation of intermediates and then conversely inhibited the·OH generation,which led to the decrease of the CO2 mineralization efficiency.The above results could provide guidance for the rational design of photocatalysts for toluene oxida-tion.
查看更多>>摘要：Mining and tailings deposition can cause serious heavy metal(loids)pollution to the sur-rounding soil environment.Soil microorganisms adapt their metabolism to such condi-tions,driving alterations in soil function.This study aims to elucidate the response patterns of nitrogen-cycling microorganisms under long-term heavy metal(loids)exposure.The re-sults showed that the diversity and abundance of nitrogen-cycling microorganisms showed negative feedback to heavy metal(loids)concentrations.Denitrifying microorganisms were shown to be the dominant microorganisms with over 60％of relative abundance and a com-plex community structure including 27 phyla.Further,the key bacterial species in the den-itrification process were calculated using a random forest model,where the top three key species(Pseudomonas stutzei,Sphingobium japonicum and Leifsonia rubra)were found to play a prominent role in nitrite reduction.Functional gene analysis and qPCR revealed that nirK,which is involved in nitrite reduction,significantly accumulated in the most metal-rich soil with the increase of absolute abundance of 63.86％.The experimental results confirmed that the activity of nitrite reductase(Nir)encoded by nirK in the soil was increased at high con-centrations of heavy metal(loids).Partial least squares-path model identified three poten-tial modes of nitrite reduction processes being stimulated by heavy metal(loids),the most prominent of which contributed to enhanced nirK abundance and soil Nir activity through positive stimulation of key species.The results provide new insights and preliminary evi-dence on the stimulation of nitrite reduction processes by heavy metal(loids).
查看更多>>摘要：As an emerging environmental contaminant,antibiotic resistance genes(ARGs)in tap wa-ter have attracted great attention.Although studies have provided ARG profiles in tap wa-ter,research on their abundance levels,composition characteristics,and potential threat is still insufficient.Here,9 household tap water samples were collected from the Guangdong-Hong Kong-Macao Greater Bay Area(GBA)in China.Additionally,75 sets of environmen-tal sample data(9 types)were downloaded from the public database.Metagenomics was then performed to explore the differences in the abundance and composition of ARGs.221 ARG subtypes consisting of 17 types were detected in tap water.Although the ARG abun-dance in tap water was not significantly different from that found in drinking water plants and reservoirs,their composition varied.In tap water samples,the three most abundant classes of resistance genes were multidrug,fosfomycin and MLS(macrolide-lincosamide-streptogramin)ARGs,and their corresponding subtypes ompR,fosX and macB were also the most abundant ARG subtypes.Regarding the potential mobility,vanS had the highest abun-dance on plasmids and viruses,but the absence of key genes rendered resistance to van-comycin ineffective.Generally,the majority of ARGs present in tap water were those that have not been assessed and are currently not listed as high-threat level ARG families based on the World Health Organization Guideline.Although the current potential threat to hu-man health posed by ARGs in tap water is limited,with persistent transfer and accumula-tion,especially in pathogens,the potential danger to human health posed by ARGs should not be ignored.
查看更多>>摘要：Harnessing bacteria for superoxide production in bioremediation holds immense promise,yet its practical application is hindered by slow production rates and the relatively weak redox potential of superoxide.This study delves into a cost-effective approach to amplify superoxide production using an Arthrobacter strain,a prevalent soil bacterial genus.Our re-search reveals that introducing a carbon source along with specific iron-binding ligands,in-cluding deferoxamine(DFO),diethylenetriamine pentaacetate(DTPA),citrate,and oxalate,robustly augments microbial superoxide generation.Moreover,our findings suggest that these iron-binding ligands play a pivotal role in converting superoxide into hydroxyl radi-cals by modulating the electron transfer rate between Fe(Ⅲ)/Fe(Ⅱ)and superoxide.Remark-ably,among the tested ligands,only DTPA emerges as a potent promoter of this conversion process when complexed with Fe(Ⅲ).We identify an optimal Fe(Ⅲ)to DTPA ratio of ap-proximately 1:1 for enhancing hydroxyl radical production within the Arthrobacter culture.This research underscores the efficacy of simultaneously introducing carbon sources and DTPA in facilitating superoxide production and its subsequent conversion to hydroxyl rad-icals,significantly elevating bioremediation performance.Furthermore,our study reveals that DTPA augments superoxide production in cultures of diverse soils,with various soil mi-croorganisms beyond Arthrobacter identified as contributors to superoxide generation.This emphasizes the universal applicability of DTPA across multiple bacterial genera.In conclu-sion,our study introduces a promising methodology for enhancing microbial superoxide production and its conversion into hydroxyl radicals.These findings hold substantial impli-cations for the deployment of microbial reactive oxygen species in bioremediation,offering innovative solutions for addressing environmental contamination challenges.
查看更多>>摘要：This study embarks on an explorative investigation into the effects of typical concentra-tions and varying particle sizes of fine grits(FG,the involatile portion of suspended solids)and fine debris(FD,the volatile yet unbiodegradable fraction of suspended solids)within the influent on the mixed liquor volatile suspended solids(MLVSS)/mixed liquor suspended solids(MLSS)ratio of an activated sludge system.Through meticulous experimentation,it was discerned that the addition of FG or FD,the particle size of FG,and the concentration of FD bore no substantial impact on the pollutant removal efficiency(denoted by the removal rate of COD and ammonia nitrogen)under constant operational conditions.However,a no-table decrease in the MLVSS/MLSS ratio was observed with a typical FG concentration of 20 mg/L,with smaller FG particle sizes exacerbating this reduction.Additionally,variations in FD concentrations influenced both MLSS and MLVSS/MLSS ratios;a higher FD concentration led to an increased MLSS and a reduced MLVSS/MLSS ratio,indicating FD accumulation in the system.A predictive model for MLVSS/MLSS was constructed based on quality balance calculations,offering a tool for foreseeing the MLVSS/MLSS ratio under stable long-term in-fluent conditions of FG and FD.This model,validated using data from the BXH wastewater treatment plant(WWTP),showcased remarkable accuracy.
查看更多>>摘要：The manganese-cobalt mixed oxide nanorods were fabricated using a hydrothermal method with different metal precursors(KMnO4 and MnSO4·H2O for MnOx and Co(NO3)2·6H2O and CoCl2·6H2O for Co3O4).Bamboo-like MnO2·Co3O4(B-MnO2·Co3O4(S))was derived from repeated hydrothermal treatments with Co3O4@MnO2 and MnSO4·H2O,whereas Co3O4@MnO2 nanorods were derived from hydrothermal treatment with Co3O4 nanorods and KMnO4.The study shows that manganese oxide was tetragonal,while the cobalt oxide was found to be cubic in the crystalline arrangement.Mn surface ions were present in mul-tiple oxidation states(e.g.,Mn4+and Mn3+)and surface oxygen deficiencies.The content of adsorbed oxygen species and reducibility at low temperature declined in the sequence of B-MnO2·Co3O4(S)＞Co3O4@MnO2＞MnO2＞Co3O4,matching the changing trend in activity.Among all the samples,B-MnO2·Co3O4(S)showed the preeminent catalytic performance for the oxidation of toluene(T10％=187℃,T50％=276℃,and T90％=339℃).In addition,the B-MnO2·Co3O4(S)sample also exhibited good H2O-,CO2-,and SO2-resistant performance.The good catalytic performance of B-MnO2·Co3O4(S)is due to the high concentration of adsorbed oxygen species and good reducibility at low temperature.Toluene oxidation over B-MnO2·Co3O4(S)proceeds through the adsorption of O2 and toluene to form O*,OH*,and H2C(C6H5)*species,which then react to produce benzyl alcohol,benzoic acid,and benzalde-hyde,ultimately converting to CO2 and H2O.The findings suggest that B-MnO2·Co3O4(S)has promising potential for use as an effective catalyst in practical applications.
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