|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | 改性零价铁降解多溴二苯醚的研究进展显示文摘多溴二苯醚(PBDEs)是一类持久性有机污染物(POPs),其无害降解技术是一个研究热点.PBDEs的降解方法包括生物降解、光降解、电解降解、零价铁(ZVI)还原降解、Fenton试剂氧化降解等.其中,零价铁因其优良的还原性能,被逐渐应用于PBDEs等POPs的还原降解,但零价铁因比表面积小、易团聚、易氧化等缺点,需通过改性以改善其降解效果.本文重点从减小铁颗粒粒径、应用搭载系统、加入活性金属、添加表面活性剂、使用辅助手段(超声或微波等)等5个方面综述了改性零价铁降解PBDEs的研究进展,讨论了各改性方法的优缺点,介绍了卤代有机污染物脱卤产物的后续降解方法,并展望了今后的研究重点. | 韩文亮 陈海明 陈兴童 | 2017 | 环境化学2017，36，7： | 8 |
| 2 | 蒙脱石搭载纳米Ni-Fe超声降解十溴二苯醚显示文摘为解决传统纳米零价铁(nZVI)降解污染物时易氧化团聚、反应活性低的问题,通过改性手段制备并表征了蒙脱石搭载纳米Ni-Fe(Ni-Fe/蒙脱石)等复合材料,考察污染物和纳米材料质量浓度、温度、溶液初始pH、超声辅助等对其降解十溴二苯醚(BDE-209)的影响,比较nZVI改性前后的降解效果,分析其机理并建立了反应动力学方程。结果表明:最佳反应条件为5mg/L的BDE-209、2g/L的nZVI、温度35℃、pH=3。超声处理10min时BDE-209基本降解完,其表观速率常数(kobs,0.519min^(–1))是震荡处理(0.013min^(–1))的40倍、静置处理(0.004min^(–1))的130倍。几种材料在10min时对BDE-209的降解率为:Ni-Fe/蒙脱石(99.5%)>nZVI/蒙脱石(85.1%)>纳米Ni-Fe(64.8%)>nZVI(48.1%)>蒙脱石(4.1%)>纳米Ni(1.1%),120min时kobs为:Ni-Fe/蒙脱石(0.519min^(–1))>nZVI/蒙脱石(0.209min^(–1))>纳米Ni-Fe(0.050min^(–1))>nZVI(0.024min^(–1))。蒙脱石、纳米Ni及超声本身基本不降解BDE-209。 | 韩文亮 陈海明 | 2018 | 化工进展2018，37，1： | 6 |
| 3 | Understanding the electrode reaction process of dechlorination of 2,4-dichlorophenol over Ni/Fe nanoparticles: Effect of pH and 2,4-dichlorophenol concentration显示文摘Herein,with the exploitation of iron and nickel electrodes,the 2,4-dichlorophenol(2,4-DCP)dechlorinating processes at the anode and cathode,respectively,were separately studied via various electrochemical techniques(e.g.,Tafel polarization,linear polarization,electrochemical impedance spectroscopy).With this in mind,Ni/Fe nanoparticles were prepared by chemical solution deposition,and utilized to test the dechlorination activities of 2,4-DCP over a bimetallic system.For the iron anode,the results showed that higher 2,4-DCP concentration and solution acidity aggravated the corrosion within the electrode.The charge transfer resistance(Rct)values of the iron electrode were 703,473,444,and 437Ω·cm2 for the initial 2,4-DCP concentrations of0,20,50,and 80 mg/L,respectively.When the bulk pH of the 2,4-DCP solution varied from 3.0,5.0to 7.0,the corresponding Rct values were 315,376,and 444Ω·cm2,respectively.For the nickel cathode,the reduction current densities on the electrode at-0.75 V(vs.saturated calomel electrode)were 80,106,and 111μA/cm2,for initial 2,4-DCP concentrations of 40,80,and125 mg/L.The dechlorination experiments demonstrated that when the initial pH of the solution was 7.0,5.0,and 3.0,the dechlorination percentage of 2,4-DCP by Ni/Fe nanoparticles was 62%,69%,and 74%,respectively,which was in line with the electrochemical experiments.10 wt.%Ni loading into Ni/Fe bimetal was affordable and gave a good dechlorination efficiency of 2,4-DCP,and fortunately the Ni/Fe nanoparticles remained comparatively stable in the dechlorination processes at pH 3.0. | Kaiyuan Zheng Yuqiao Song Xu Wang Xin Li Xuhui Mao Dihua Wang | 2019 | Journal of Environmental Sciences2019，31，10： | 2 |
| 4 | Preparation and characterization of Pd/Fe bimetallic nanoparticles immobilized on Al_2O_3/PVDF membrane:Parameter optimization and dechlorination of dichloroacetic acid显示文摘Using a liquid–solid phase inversion method, a hybrid matrix poly(vinylidene fluoride)(PVDF) membrane was prepared with alumina(Al2O3) nanoparticle addition. Pd/Fe nanoparticles(NPs) were successfully immobilized on the Al2O3/PVDF membrane, which was characterized by Scanning Electron Microscopy(SEM) and Transmission Electron Microscopy(TEM). The micrographs showed that the Pd/Fe NPs were dispersed homogeneously. Several important experimental parameters were optimized, including the mechanical properties, contact angle and surface area of Al2O3/PVDF composite membranes with different Al2O3 contents. At the same time, the ferrous ion concentration and the effect of hydrophilization were studied. The results showed that the modified Al2O3/PVDF membrane functioned well as a support. The Al2O3/PVDF membrane with immobilized Pd/Fe NPs exhibited high efficiency in terms of dichloroacetic acid(DCAA) dechlorination. Additionally, a reaction pathway for DCAA dechlorination by Pd/Fe NPs immobilized on the Al2O3/PVDF membrane system was proposed. | Lijuan Zhang Zhaohong Meng Shuying Zang | 2015 | Journal of Environmental Sciences2015，27，5： | 2 |
| 5 | Enhanced dechlorination of 2,4-dichlorophenol by recoverable Ni/Fe–Fe_3O_4 nanocomposites显示文摘Ni/Fe-Fe_3O_4 nanocomposites were synthesized for dechlorination of 2,4-dichlorophenol(2,4-DCP). The effects of the Ni content in Ni/Fe-Fe_3O_4 nanocomposites, solution pH, and common dissolved ions on the dechlorination efficiency were investigated, in addition to the reusability of the nanocomposites. The results showed that increasing content of Ni in Ni/Fe–Fe_3O_4 nanocomposites, from 1 to 5 wt.%, greatly increased the dechlorination efficiency; the Ni/Fe–Fe_3O_4 nanocomposites had much higher dechlorination efficiency than bare Ni/Fe nanoparticles. Ni content of 5 wt.% and initial p H below 6.0 was found to be the optimal conditions for the catalytic dechlorination of 2,4-DCP. Both 2,4-DCP and the intermediate product 2-chlorophenol(2-CP) were completely removed, and the concentration of the final product phenol was close to the theoretical phenol production from complete dechlorination of 20 mg/L of 2,4-DCP, after 3 hr reaction at initial p H value of 6.0,3 g/L Ni/Fe-Fe_3O_4 , 5 wt.% Ni content in the composite, and temperature of 22℃. 2,4-DCP dechlorination was enhanced by Cl-and inhibited by NO3-and SO_4^(2-). The nanocomposites were easily separated from the solution by an applied magnetic field. When the catalyst was reused, the removal efficiency of 2,4-DCP was almost 100% for the first seven uses, and gradually decreased to 75% in cycles 8–10. Therefore, the Ni/Fe–Fe_3O_4 nanocomposites can be considered as a potentially effective tool for remediation of pollution by 2,4-DCP. | Cancan Xu Rui Liu Lvjun Chen Jialu Tang | 2016 | Journal of Environmental Sciences2016，28，10： | 2 |
| 6 | 纳米Ni/Fe用于去除染料生产废水二级生物处理出水中AOX和色度的研究显示文摘用纳米Ni/Fe材料深度处理染料生产废水的生物处理出水,考察了不同Ni负载量(质量分数0~5%)、废水初始p H值(4.1~10.0)、Ni/Fe投加量(1~5 g·L-1)、反应时间(0.5~96 h)下对可吸附性有机卤代物(absorbable organic halogens,AOX)的去除率和脱色率.结果表明,AOX和色度去除率随Ni负载量的增加先升高后减少,随废水初始p H值的降低和Ni/Fe投加量的增加而持续提高.最优化条件为Ni负载量1%、废水初始p H 4.1和Ni/Fe投加量3 g·L-1,该条件下AOX和色度的24 h去除率分别为29.2%和79.6%,96 h去除率分别为50.6%和80.7%.GC-MS分析表明经材料处理后废水中氯代苯胺类、对硝基苯胺、4-甲氧基-2-硝基苯胺及卤代烷烃等有毒有害物质得到高效去除. | 舒小铭 徐灿灿 刘锐 赵远 陈吕军 | 2016 | 环境科学2016，37，2： | 2 |
| 7 | 催化加氢脱氯合成间叔丁基苯胺显示文摘间叔丁基苯胺是重要的医药和农药中间体。以工业镍催化4-氯-3-硝基叔丁基苯加氢还原脱氯合成了间叔丁基苯胺,考察了溶剂及其用量、催化剂用量、脱氯剂、反应温度、反应压力等对加氢脱氯反应的影响,得到了最佳反应条件为:用甲醇和水(V∶V=4∶1)作溶剂,碳酸钠为脱氯剂,催化剂、脱氯剂、4-氯-3-硝基叔丁基苯质量之比为3∶10∶20,反应温度为140℃,氢气压力为3.0MPa时,还原加氢脱氯效果最好,间叔丁基苯胺产率最高。特别值得一提的是,加入碳酸钠后产率明显提高,表现出了相当强的脱氯能力。在反应体系中加水,提高了产率,是一种环境友好的绿色合成方法。 | 李舂龙 | 2015 | 化学世界2015，56，7： | 1 |
| 8 | Liquid-phase hydrodechlorination of trichloroethylene driven by nascent H_(2)under an open system:Hydrogenation activity,solvent effect and sulfur poisoning显示文摘Hydrodechlorination is a promising technology for the remediation of water body contaminated with trichloroethylene(TCE).In this work,the liquid-phase hydrogenation of TCE by Raney Ni(R-Ni)and Pd/C under an open system have been studied,in which nascent H_(2)(Nas-H_(2))generated in situ from the cathode acted as a hydrogen source.Experimental results showed that TCE was completely eliminate from the solution through the synergistic effects of hydrodechlorination and air flotation due to the formation of continuous micro/nano-sized Nas-H_(2)bubbles from the cathode.Furthermore,the effects of inorganic anions and organic solvents on R-Ni and Pd/C hydrogenation activity were investigated,respectively.The results showed that NO_(3)^(-) and acetonitrile can form a competitive reaction with TCE;Sulfur with lone-pair electrons will cause irreversible poisoning to these two catalysts,and have a stronger inhibitory effect on Pd/C.This work helps to realize the separation of volatile halogenated compounds from water environment and provides certain data support for the choice of catalyst in the actual liquid-phase hydrogenation system. | Weilai Wang Fan Zhang Yunfei Zhang Lei Xu Yuansheng Pei Junfeng Niu | 2021 | Journal of Environmental Sciences2021，33，10： | 0 |
| 9 | 石墨烯负载铁镍复合材料去除水中的2,4-二氯酚显示文摘通过液相还原法成功制备了石墨烯负载纳米铁镍复合材料,该材料可高效快速地吸附水中的2,4-二氯酚(2,4-DCP)并对其进行脱氯.微观形貌分析结果表明,粒径为80~150nm的球形Fe/Ni纳米颗粒成功插入石墨烯片层,并主要分布在石墨烯片层边缘和褶皱处,Fe/Ni颗粒团聚现象明显减少,更多活性位点暴露出来.XRD分析和FTIR分析表明,纳米零价铁(nZVI)通过Fe-O键成功嵌入石墨烯(r GO)中,且Fe/Ni纳米颗粒结晶度较差,外围包覆有无定形的铁氧化物沉淀.探讨了不同制备条件如碳铁比、镍化率、氧化石墨烯(GO)还原程度对材料去除2,4-二氯酚(2,4-DCP)性能的影响.综合考虑材料制备成本及对2,4-DCP的吸附脱氯性能,Fe/Ni@rGO复合材料的最优制备条件为:石墨烯与Fe质量比1:2,镍负载率5%,硼氢化钠与铁盐的物质的量比为5:1.研究表明5种材料对2,4-DCP的去除率遵循如下顺序:Fe/Ni@rGO复合材料>Fe/Ni>Fe@rGO复合材料>石墨烯>nZVI.储存稳定性试验和循环试验表明,与Fe/Ni双金属相比,Fe/Ni@rGO材料具有稳定的反应活性和较高的重复利用价值.研究结果表明Fe/Ni@rGO复合材料对2,4-DCP的去除为吸附和脱氯协同作用的结果. | 黄雪征 张永祥 张大胜 朱新锋 李厚运 | 2023 | 中国环境科学2023，43，12： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员