1,2-Dichloroethane (1,2-DCA) represents a significant threat to both the environment and human being due to its persistence,tendency to bioaccumulate,and toxic properties.To address 1,2-DCA contamination in the environment,a succinic acid-modified biochar-supported nano zero-valent iron (DBC-nZVI) composite material is prepared via a liquid-phase reduction process,and characterized and analyzed by means of scanning electron microscopy (SEM),X-ray diffraction (XRD),Fourier-transform infrared spectroscopy (FT-IR),and other advanced techniques to optimize its structural integrity and performance.The findings indicate that the removal rate of 1,2-DCA by DBC-nZVI can reach up to 52% at a pH level of 7,a pyrolysis temperature of 500℃,and a carbon-to-iron mass ratio of 3∶1,highlighting its potential for effective environmental remediation.Soil tests confirm that pH positively correlates with the removal efficiency,while the fluctuations in temperature significantly influence the removal rate as well.These results underscore the importance of controlling environmental factors to maximize the effectiveness of DBC-nZVI in practical application.
利用日本电子株式会社生产的JSM-6380LV型扫描电子显微镜(SEM)观测样品的形貌特征;利用日本岛津公司生产的6100型多晶粉末X射线衍射仪(XRD)表征样品的晶体结构;利用德国布鲁克公司生产的TENSOR27型傅立叶红外光谱仪(FT-IR)表征样品的物理化学特性;利用奥地利安东帕公司生产的Autosorb iQ MP型全自动比表面与孔径分析仪(BET)测定样品的比表面积、孔体积及孔径;利用日本岛津公司生产的AXIS SUPRA型X射线光电子能谱仪(XPS)分析材料表面元素的化学状态和电子结构。
NobreR C M, NobreM M M, CamposT M P, et al. In-situ biodegradation potential of 1,2-DCA and VC at sites with different hydrogeological settings[J]. Journal of Hazardous Materials, 2017, 340:417-426.
[2]
OhuraT, SuharaT, KamiyaY, et al. Distributions and multiple sources of chlorinated polycyclic aromatic hydrocarbons in the air over Japan[J]. Science of the Total Environment, 2019, 649:364-371.
[3]
TuZ, ZhouY, ZhouJ, et al. Identification and risk assessment of priority control organic pollutants in groundwater in the Junggar Basin in Xinjiang,PR China[J]. International Journal of Environmental Research and Public Health, 2023, 20(3):2051.
OlaniranA O, NaickerK, PillayB. Antibiotic resistance profiles of Escherichia coli isolates from river sources in Durban,South Africa[J]. World Journal of Microbiology and Biotechnology, 2009, 25:1743-1749.
[8]
WeiY T, WuS, YangS W, et al. Biodegradable surfactant stabilized nanoscale zero-valent iron for in situ treatment of vinyl chloride and 1,2-dichloroethane[J]. Journal of Hazardous Materials, 2012, 211:373-380.
[9]
HuangC C, LoS L, TsaiS M, et al. Catalytic hydrodechlorination of 1,2-dichloroethane using copper nanoparticles under reduction conditions of sodium borohydride[J]. Journal of Environmental Monitoring, 2011, 13(9):2406-2412.
[10]
KenD S, SinhaA. Recent developments in surface modification of nano zero-valent iron (nZVI):Remediation,toxicity and environmental impacts[J]. Environmental Nanotechnology,Monitoring & Management, 2020, 14:100344.
[11]
AmbikaS, NambiI M, SenthilnathanJ. Low temperature synthesis of highly stable and reusable CMC-Fe2+ (-nZVI) catalyst for the elimination of organic pollutants[J]. Chemical Engineering Journal, 2016, 289:544-553.
[12]
SunP, WangZ, AnS, et al. Biochar-supported nZVI for the removal of Cr(Ⅵ) from soil and water:Advances in experimental research and engineering applications[J]. Journal of Environmental Management, 2022, 316:115211.
[13]
CaoB, LiM, ZhangT, et al. Dynamics and mechanisms of atrazine adsorption on biogas-residue biochar with citric acid modification[J]. Separation and Purification Technology, 2024, 337:126151.
[14]
HouD, CuiX, LiuM, et al. Degradation of trichloroethylene by biochar supported nano zero-valent iron (BC-nZVI):The role of specific surface area and electrochemical properties[J]. Science of the Total Environment, 2024, 908:168341.
OnayO. Influence of pyrolysis temperature and heating rate on the production of bio-oil and char from safflower seed by pyrolysis,using a well-swept fixed-bed reactor[J]. Fuel Processing Technology, 2007, 88(5):523-531.
ChoiH, Al-AbedS R, AgarwalS, et al. Synthesis of reactive nano-Fe/Pd bimetallic system-impregnated activated carbon for the simultaneous adsorption and dechlorination of PCBs[J]. Chemistry of Materials, 2008, 20(11):3649-3655.
[19]
ZhuangM, WangH, QiL, et al. Production of activated biochar via a self-blowing strategy-supported sulfidated nanoscale zerovalent iron with enhanced reactivity and stability for Cr(Ⅵ) reduction[J]. Journal of Cleaner Production, 2021, 315:128108.
[20]
ShanA, IdreesA, ZamanW Q, et al. Synthesis of nZVI-Ni@BC composite as a stable catalyst to activate persulfate:Trichloroethylene degradation and insight mechanism[J]. Journal of Environmental Chemical Engineering, 2021, 9(1):104808.
[21]
CaiZ, JiangC, XiaoX F, et al. Lignin-based biochar/graphene oxide composites as supercapacitor electrode materials[C]// IOP Conference Series: Materials Science and Engineering.IOP Publishing, 2018, 359(1):012046.
[22]
YiL, ZuoL, WeiC, et al. Enhanced adsorption of bisphenol A,tylosin,and tetracycline from aqueous solution to nitrogen-doped multiwall carbon nanotubes via cation-π and π-π electron-donor-acceptor (EDA) interactions[J]. Science of the Total Environment, 2020, 719:137389.
LinJ, SunM, LiuX, et al. Functional kaolin supported nanoscale zero-valent iron as a Fenton-like catalyst for the degradation of Direct Black G[J]. Chemosphere, 2017, 184:664-672.
[25]
LvD, ZhouJ, CaoZ, et al. Mechanism and influence factors of chromium(Ⅵ) removal by sulfide-modified nanoscale zerovalent iron[J]. Chemosphere, 2019, 224:306-315.
[26]
SuS, CaoC, ZhaoY, et al. Efficient transformation and elimination of roxarsone and its metabolites by a new α-FeOOH@GCA activating persulfate system under UV irradiation with subsequent As(Ⅴ) recovery[J]. Applied Catalysis B:Environmental, 2019, 245:207-219.
SunY, ZhengK, DuX, et al. Insights into the contrasting effects of sulfidation on dechlorination of chlorinated aliphatic hydrocarbons by zero-valent iron[J]. Water Research, 2024, 255:121494.