Journal of Environmental Sciences-china最新文献

{"title":"Environmental studies of priority persistent contaminants: A special issue dedicated to Professor Chuanyong Jing","authors":"Emma Jing , Li Yan , Guibin Jiang , X. Chris Le","doi":"10.1016/j.jes.2024.12.026","DOIUrl":"10.1016/j.jes.2024.12.026","url":null,"abstract":"","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"153 ","pages":"Pages 1-5"},"PeriodicalIF":5.9,"publicationDate":"2024-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143039488","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"New insight into rapid removal of refractory pollutants via efficient charge transfer under visible light","authors":"Songlin Cai ,&nbsp;Ciyuan Huang ,&nbsp;Linji Yang ,&nbsp;Yuchen Wang ,&nbsp;Lingxiao Li ,&nbsp;Shangfei Yao ,&nbsp;Ke Sun ,&nbsp;Caiyun Wang ,&nbsp;Guanhui Tan ,&nbsp;Tao Yang ,&nbsp;Shengjie Wang ,&nbsp;Bingsuo Zou ,&nbsp;Tao Liu","doi":"10.1016/j.jes.2024.12.019","DOIUrl":"10.1016/j.jes.2024.12.019","url":null,"abstract":"<div><div>The widespread use of personal care products poses significant risks to both ecosystems and human health. The construction of photocatalysts with the advantages of enhanced visible light absorption, efficient charge separation and high stability is important for the degradation of persistent environmental pollutants. Herein, we have prepared two D-A heterojunction organic semiconductor photocatalysts: PV-BDTC1:IDTCN/Biochar and PV-BDTC2:IDTCN/Biochar by a simple design method that can be widely applied. Under visible light irradiation, PV-BDTC2:IDTCN/Biochar showed better removal ability for indomethacin, with reaction rate constants 14.7 and 5.1 times higher than those of PV-BDTC2:IDTCN and Biochar, respectively. This is attributed to the construction of a heterojunction between the donor and the acceptor, which expands the light absorption range and promotes the separation of photogenerated carriers, thereby giving the material the ability to produce a large number of reactive oxygen species during the photocatalytic reaction. In addition, Biochar well ensures the stability of D-A heterojunction films under long-term operating conditions. This work highlight the potential of natural biomaterials in constructing effective D-A heterojunction organic photocatalysts/adsorbents for combatting water pollution.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"155 ","pages":"Pages 139-150"},"PeriodicalIF":5.9,"publicationDate":"2024-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143158422","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Construction of an SnS-based heterostructure catalyst for electrochemical CO2 reduction to formate over a wide potential window","authors":"Renzhi Qi ,&nbsp;Zhaoping Zhong ,&nbsp;Fei Huang ,&nbsp;Fuqiang Chen ,&nbsp;You Jia ,&nbsp;Yuxuan Yang ,&nbsp;Zekun Yun ,&nbsp;Qihang Ye","doi":"10.1016/j.jes.2024.12.015","DOIUrl":"10.1016/j.jes.2024.12.015","url":null,"abstract":"<div><div>SnS has emerged as an attractive catalyst for the electrochemical CO₂ reduction reaction (CO₂RR) to formate, while its long-term operational stability is hindered by the self-reduction of Sn²⁺ and sulfur dissolution. Thus, maintaining high current efficiency across a wide negative potential range to achieve high production rates of formate remains a significant challenge. In this study, we present a heterostructure constructed with SnS and CuS for efficient CO₂RR to formate. The SnS-CuS (30) exhibits a remarkable formate Faradaic efficiency (<em>FE_f</em>) of 93.94 % at −1 V vs reversible hydrogen electrode (RHE) and demonstrates long-term stability for 7.5 h, maintaining high activity (with an average <em>FE_f</em> of 85.6 %) across a wide negative potential range (− 0.8 V−1.2 V (vs. RHE)). The results reveal that the heterogeneous interface between SnS and CuS mitigates the self-reduction issue of SnS by sacrificing Cu²⁺, highlighting that the true active species is SnS, which effectively resists structural changes during the electrolysis process under the protection of CuS. The synergistic interaction within the CuS and SnS heterostructure, combined with the tendency for electron self-conduction, enables the catalyst to maintain high formate activity and selectivity across a wide potential range. Furthermore, theoretical results further indicate that the incorporation of CuS enhances CO₂ adsorption and lowers the energy barrier for the formation of formate intermediates. This study inspires the concept of applying protective layers to active species, promoting high selectivity in Sn-based electrocatalysts.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"155 ","pages":"Pages 25-36"},"PeriodicalIF":5.9,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143158377","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dual S-scheme heterojunction via MOF-on-MOF strategy for efficient photoelectrocatalytic removal of organic contaminants: Detoxification and mechanism","authors":"Qiang Li ,&nbsp;Qi Zhou ,&nbsp;Yanling Wu ,&nbsp;Yingxue Shi ,&nbsp;Yingqi Liu ,&nbsp;Hao Deng ,&nbsp;Siwei Chen ,&nbsp;Zhiheng Li ,&nbsp;Erpeng Wang ,&nbsp;Huayue Zhu ,&nbsp;Qi Wang","doi":"10.1016/j.jes.2024.12.014","DOIUrl":"10.1016/j.jes.2024.12.014","url":null,"abstract":"<div><div>Accelerating the separation of carriers in the heterojunction plays vital role in the photoelectrocatalytic (PEC) process, yet it remains a challenging undertaking. Herein, a MOF-on-MOF based dual S-scheme heterojunction (BiVO₄/NH₂-MIL-125(Ti)/NH₂-MIL-53(Fe), denoted as BVO/NM125/NM53) was rationally designed and prepared for PEC removing and detoxification of organic contaminants (phenol, tetracycline hydrochloride, ciprofloxacin and norfloxacin). The S-scheme heterojunction was double confirmed by DFT calculation and XPS analysis. The charge transfer resistance of BVO/NM125/NM53 photoanode decreases to 1/11 of bare BiVO₄ photoanode. Meanwhile, the photocurrent density was 3 times higher, demonstrating a marked improvement in carrier separation efficiency due to dual S-scheme heterojunction. The photoanode achieved 94.3 % removal of phenol within 60 min and maintained stable performance over 10 consecutive cycles, demonstrating good PEC efficiency and structural stability. The BVO/NM125/NM53 photoanode also showed effectiveness in removing antibiotics, with chlorophyll fluorescence imaging confirming a significant reduction in the ecotoxicity of intermediates. For example, wheat seed germination, growth, chlorophyll and Carotenoid production were not affected, which was similar to that of deionized water. Radical trapping experiments and electron paramagnetic resonance (EPR) analysis identified •O₂^- and •OH as the primary active species. This work demonstrates the effectiveness of developing MOF-on-MOF heterojunctions for visible-light response and enhancing charge separation in PEC.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"155 ","pages":"Pages 111-126"},"PeriodicalIF":5.9,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143158420","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Arsenic speciation in freshwater fish using high performance liquid chromatography and inductively coupled plasma mass spectrometry","authors":"Chester Lau ,&nbsp;Xiufen Lu ,&nbsp;Karen S. Hoy ,&nbsp;Tetiana Davydiuk ,&nbsp;Jennifer A. Graydon ,&nbsp;Megan Reichert ,&nbsp;X. Chris Le","doi":"10.1016/j.jes.2024.12.010","DOIUrl":"10.1016/j.jes.2024.12.010","url":null,"abstract":"<div><div>Arsenic speciation in freshwater fish is crucial for providing meaningful consumption guidelines that allow the public to make informed decisions regarding its consumption. While marine fish have attracted much research interest due to their higher arsenic content, research on freshwater fish is limited due to the challenges in quantifying and identifying arsenic species present at trace levels. We describe here a sensitive method and its application to the quantification of arsenic species in freshwater fish. Arsenic species from fish tissues were extracted using a methanol/water mixture (1:1 vol. ratio) and ultrasound sonication. Anion-exchange high-performance liquid chromatography (HPLC) enabled separation of arsenobetaine (AsB), inorganic arsenite (iAs^III), dimethylarsinic acid (DMA), monomethylarsonic acid (MMA), inorganic arsenate (iAs^V), and three new arsenic species. Inductively coupled plasma mass spectrometry (ICPMS) provided highly sensitive and specific detection of arsenic. A limit of detection of 0.25 µg/kg (wet weight fish tissue) was achieved for the five target arsenic species: AsB, iAs^III, DMA, MMA, and iAs^V. A series of experiments were conducted to ensure the accuracy and validity of the analytical method. The method was successfully applied to the determination of arsenic species in lake whitefish, northern pike, and walleye, with AsB, DMA, and iAs^V being frequently detected. Three new arsenic species were detected, but their chromatographic retention times did not match with those of any available arsenic standards. Future research is necessary to elucidate the identity of these new arsenic species detected in freshwater fish.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"153 ","pages":"Pages 302-315"},"PeriodicalIF":5.9,"publicationDate":"2024-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143039481","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Arsenic speciation in more than 1600 freshwater fish samples from fifty-three waterbodies in Alberta, Canada","authors":"Chester Lau ,&nbsp;Xiufen Lu ,&nbsp;Xiaojian Chen ,&nbsp;Karen S. Hoy ,&nbsp;Tetiana Davydiuk ,&nbsp;Jennifer A. Graydon ,&nbsp;Megan Reichert ,&nbsp;Adrienne LeBlanc ,&nbsp;Caitlyn Donadt ,&nbsp;Gian Jhangri ,&nbsp;X. Chris Le","doi":"10.1016/j.jes.2024.12.009","DOIUrl":"10.1016/j.jes.2024.12.009","url":null,"abstract":"<div><div>We report here arsenic speciation in 1643 freshwater fish samples, representing 14 common fish species from 53 waterbodies in Alberta, Canada. Arsenic species were extracted from fish muscle tissue. Arsenic species in the extracts were separated using anion-exchange high-performance liquid chromatography (HPLC) and quantified using inductively coupled plasma mass spectrometry (ICPMS). The total arsenic concentrations in fish ranged from 2.8 to 1200 µg/kg (in wet weight of sample) (mean 71 ± 101 µg/kg), which are all below the 2000 µg/kg (wet weight) maximum allowable total arsenic in fish, recommended by the Ontario Ministry of the Environment. In 99.7%, or 1638 of all 1643 freshwater fish samples analyzed, arsenobetaine (AsB) was detectable, with concentrations higher than the method detection limit of 0.25 µg/kg (wet weight). Dimethylarsinic acid (DMA) was detectable (concentration &gt;0.25 µg/kg) in 92.1%, or 1514 of the 1643 freshwater fish samples. Inorganic arsenate (iAs^V) was detectable (&gt;0.25 µg/kg) in 1119 fish (i.e., 68.1% of 1643 samples). Monomethylarsonic acid (MMA) was detectable (&gt;0.25 µg/kg) in 418 fish (25.4% of 1643 samples). The concentrations of arsenic species in the 1643 fish samples varied by as much as three orders of magnitude, ranging from below the method detection limit of 0.25 µg/kg to the maximum concentrations of 380 µg/kg for AsB, 150 µg/kg for DMA, 70 µg/kg for iAs^V, and 51 µg/kg for MMA. AsB made up 46.1% ± 26.2% of total arsenic species. Arsenic speciation patterns varied between lake whitefish, northern pike, and walleye, the three most common types of fish analyzed. The relative proportion of DMA in northern pike was larger than in lake whitefish and walleye, and conversely, the relative proportion of iAs^V was lower in northern pike. Seven unknown arsenic species were detected, and their chromatographic retention time did not match with those of available arsenic standards. At least one unknown arsenic species was detected in 33.4%, or 549 of 1643 freshwater fish samples. The concentrations of unknown arsenic species were as high as 61 µg/kg. Future research is necessary to identify unknown arsenic species and to determine contributing factors to the observed arsenic species patterns and concentrations.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"153 ","pages":"Pages 289-301"},"PeriodicalIF":5.9,"publicationDate":"2024-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143039482","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Immunosuppressive role of benzo[a]pyrene exposure in prostate cancer progression","authors":"Zhijin Zhang ,&nbsp;Wentao Zhang ,&nbsp;Huan Wang ,&nbsp;Haotian Chen ,&nbsp;Hong Wang ,&nbsp;Yang Yu ,&nbsp;Danjing Shen ,&nbsp;Man Pi ,&nbsp;Yang Wu ,&nbsp;Ming Luo ,&nbsp;Yanyan He ,&nbsp;Shiyu Mao ,&nbsp;Jiang Geng ,&nbsp;Wei Li ,&nbsp;Guangchun Wang ,&nbsp;Changcheng Guo ,&nbsp;Daqiang Yin ,&nbsp;Xudong Yao","doi":"10.1016/j.jes.2024.11.032","DOIUrl":"10.1016/j.jes.2024.11.032","url":null,"abstract":"<div><div>Epidemiological studies indicate that prostate cancer (PCa) is the second prevalent malignant tumor affecting men globally. Environmental pollution such as cigarette smoke is one of the important risk factors for the development of prostate cancer. However, as one of the main carcinogens in cigarette smoke, the role of benzo[a]pyrene (BaP) in prostate cancer is still unclear. The current study aimed to investgate the impacts of BaP exposure on the progression of PCa toward malignancy and the regulation of the immune microenvironment. We verified that BaP exposure can promote the proliferation, migration, and apoptosis of prostate cancer cells through <em>in vitro</em> experiments. We constructed a subcutaneous xenograft tumor model of BaP exposure mouse and found that can promote the proliferation of tumors <em>in vivo</em>. Organoids-driven by PCa patients showed higher growth rate under BaP exposure. Flow cytometric analysis demonstrated a remarkable decrease in CD4⁺ T and CD8⁺ T cell infiltration levels. Moreover, we identified four genes (<em>Mdm2, Ar, Foxo1, Crebbp</em>) were strongly associated with BaP exposure by combining mouse tumor RNA-seq and CTD database. Additionally, a nomogram integrating clinicopathological features was constructed to assess the prognosis of prostate cancer patients under BaP exposure. This study systematically proved that BaP exposure promotes malignant progression of PCa and suppresses the immune microenvironment, in which <em>Mdm2, Ar, Foxo1, Crebbp</em> may play a crucial role in inhibiting apoptosis. These findings offer novel insights into the mechanisms via which BaP exposure contributes to PCa development.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"156 ","pages":"Pages 185-199"},"PeriodicalIF":5.9,"publicationDate":"2024-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143610464","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Characterization of atmospheric humic-like substances (HULIS) at a high elevation in North China: Abundance, molecular composition and optical properties","authors":"Chaofan Gong ,&nbsp;Xinghui Liu ,&nbsp;Xiaoling Nie ,&nbsp;Xinmiao Xu ,&nbsp;Xinfeng Wang ,&nbsp;Likun Xue ,&nbsp;Yan Wang","doi":"10.1016/j.jes.2024.11.028","DOIUrl":"10.1016/j.jes.2024.11.028","url":null,"abstract":"<div><div>The optical absorption of large molecular compounds HULIS (humic-like substances) can significantly impact the aerosol light absorption and radiative forcing, influencing cloud condensation nuclei formation and thus the climate and atmospheric environment. This study collected aerosol (PM_2.5) samples from the summit of Mount Tai in North China to investigate the concentration, molecular composition, and optical properties of HULIS. The average concentration of HULIS in the PM_2.5 in this study was 1.26 ± 0.54 µg/m³, comprising for 56 % of the water-soluble organic carbon (WSOC), with levels lower than urban areas but higher than other mountainous regions. Mass spectrometry revealed that CHO and CHON components, with high aromaticity and phenolic groups, are major contributors to absorption and fluorescence. These results indicate that HULIS is mainly composed of lignin and proteins/amino sugars, derived from combustion and secondary formation, and possesses a high light absorption capacity (with MAE₃₆₅ (mass absorption efficiency) and AAE (Ångström exponent) indices of 0.62 m²/g and 4.99, respectively). Parallel factor analysis identified three fluorescence components of HULIS, with proportions of 60.8 % for less oxygen humic-like substances, 21.0 % for high oxygen humic-like substances, and 18.2 % for protein-like substances. Our study highlights the significance of the light-absorbing capacity and secondary formation of HULIS at Mount Tai, laying the groundwork for investigation into the climate effects, formation mechanisms, and sources of HULIS generation.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"155 ","pages":"Pages 673-685"},"PeriodicalIF":5.9,"publicationDate":"2024-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143512164","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Insight into the effect of manganese oxidation state on the synthesis of ethylene urea from CO2 and ethylenediamine","authors":"Fei Wang ,&nbsp;Biao Da ,&nbsp;Yulong Jin ,&nbsp;Piracha Sanwal ,&nbsp;Lei Cui ,&nbsp;Siru Chen ,&nbsp;Jie Xu ,&nbsp;Bing Xue ,&nbsp;Gao Li","doi":"10.1016/j.jes.2024.11.025","DOIUrl":"10.1016/j.jes.2024.11.025","url":null,"abstract":"<div><div>Herein, a series of manganese oxide catalysts with different valences (Mn₃O₄, Mn₂O₃, and MnO₂) were designed and synthesized for the synthesis of ethylene urea (EU) from ethylenediamine (EDA) and carbon dioxide (CO₂). With a maximal EDA conversion of 82 % and EU selectivity of 99 % at 160 °C for 2 h, Mn₂O₃ catalysts had the best catalytic activity among them, which was superior to the reported catalysts. In the following order: Mn₂O₃ &gt; MnO₂ &gt; Mn₃O₄, the catalytic activity for the synthesis of EU from CO₂ and EDA decreased. Further characterization showed the Mn₂O₃ catalyst possessed a greater Mn³⁺/Mn⁴⁺ ratio and more surface oxygen vacancies than the MnO₂ and Mn₃O₄, which improved its capacity to adsorb and activate CO₂ and EDA. After four recycling runs, the EDA conversion slightly declined from 82 % to 56 % on Mn₂O₃ catalyst, while no obvious change in EU selectivity was observed. The loss of surface O_v contents and Mn³⁺ proportion were concluded as main reasons for the decrease in catalytic activity over Mn₂O₃ catalyst. This work demonstrated a metal oxide catalyst that was efficient in producing EU from CO₂ and EDA.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"155 ","pages":"Pages 37-47"},"PeriodicalIF":5.9,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143158378","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multilevel immobilized CNT/SCN purification beads and the removal efficiency over TCHCl/clay composite pollutant in the underwater environment","authors":"Zhenyu Shi ,&nbsp;Lei Rao ,&nbsp;Peifang Wang","doi":"10.1016/j.jes.2024.11.026","DOIUrl":"10.1016/j.jes.2024.11.026","url":null,"abstract":"<div><div>Natural water bodies often contain a significant amount of suspended colloidal particles, which not only reduce water transparency but also have a high adsorption capacity for soluble pollutants. These composite pollutants can migrate rapidly with water flow, which are usually difficult to degrade and remove by traditional methods. Aiming at suspended contaminated waterbodies, this study introduced a multilevel loading method to prepare carbon nanotube/sulfur doped carbon nitride (CNT/SCN) composite photocatalytic purification beads. The surface of the obtained core-shell structured purification beads is loaded with CNT/SCN photocatalysts which exhibit three-dimensional conductive and porous characteristics. TC<img>HCl was introduced as the target pollutant, and the removal efficiency of the composite purification beads under different water turbidity and hydrodynamic conditions were investigated. The results showed that during 15 h of degradation process, at the depth of 20 cm, with the flow rate of 0.015 m³/h and water turbidity of 10.3 NTU, the purification beads achieved a removal efficiency of 54.9% for tetracycline hydrochloride (TC<img>HCl), which was 2.03 times higher than that of SCN purification beads. The three-dimensional porous structure of the surface exhibited excellent adsorption and trapping capabilities for suspended colloidal particles. The introduction of carbon nanotubes enhanced charge transfer ability of the surface layer and reduces the local charge accumulation effect caused by surface adsorption, which effectively enhances the adsorption of suspended colloid, and also significantly improved the degradation efficiency of TC<img>HCl. This study provides a valuable insight for the engineering application of photocatalytic technology.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"155 ","pages":"Pages 13-24"},"PeriodicalIF":5.9,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143158380","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}