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The Efect of Rich Synthetic Copper-rich Solution on Antiseepage Dense Pre-hydration Geosynthetic Clay Liner

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Journal of Wuhan University of Technology(Materials Science) 2023年第4期38卷 796-802页

作者：郭争争 GUAN Junfang 任子杰 GAO Huimin LI Peiyue School of resources and environment Engineering Wuhan University of TechnologyWuhan430070China hubei key laboratory of mineral resources processing and environment Wuhan430070China

Dense pre-hydrated geosynthetic clay liners(DPH GCLs)were manufactured as innovative materials accompanied by the advantage of lower hydraulic conductivity(k).The k of DPH GCLs permeated with de-ionized water(DIW)was 9.8×10^(−12) m/*** effect of Cu^(2+)synthetic solution on DPH GCLs was ***,the effect mechanism was studied on the basis of test technologies.A significant adverse impact on hydraulic performance of DPH GCLs is found when the concentration of Cu^(2+)is greater than 1 g/***,XRD,XRF,FTIR,and XPS analyses show that the effect of Cu^(2+)on DPH GCLs includes two ***,Cu^(2+)interacts with hydrophobic organic matter(HOM),and the adhesion of bentonite is destroyed,and some holes *** Cu^(2+)contacts with bentonite directly,and Cu^(2+)interacts with bentonite through ion *** phenomenon occurs on the surface of the bentonite,and swelling ability of bentonite is reduced,which causes permeable DPH GCLs.

关键词： geosynthetic clay liners fense pre-hydrated geosynthetic clay liners effect Cu^(2+)

Effect of Calcium on the Vanadium Extraction from High Calcium Type Stone Coal

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Journal of Wuhan University of Technology(Materials Science) 2015年第2期30卷 320-324页

作者：包申旭 LIANG Liang 张一敏 HAN Shihua HU Yangjia College of resources and environmental Engineering Wuhan University of Technology hubei key laboratory of mineral resources processing and environment

The high calcium type stone coal from hubei province was leached by water and dilute acid separately after being roasted with different dosage of Na Cl. The water leaching rate of vanadium（WLRV） was low and only 26.8% of vanadium can be leached by water when 4% Na Cl was added, but the acid leaching rate of vanadium（ALRV） was relatively high. Calcium in the high calcium type stone coal is greatly superfl uous relative to vanadium, hence, the calcium reacts with vanadium to form Ca（VO3）2, Ca2V2O7 and Ca3（VO4）2orderly during the stone coal roasting process and high temperature is beneficial to the reactions between calcium and vanadium, which was validated by simulated reactions between pure calcium carbonate and vanadium pentoxide. These calcium vanadates are all water insoluble but acid soluble and this causes the low WLRV and relatively high ALRV. After calcium removal by HCl, the WLRV is highly enhanced and reaches about 50% when only 2% Na Cl was added. If the HCl content is too high, the stone coal is easily sintered and the formed glass structure can enwrap vanadium, which leads the WLRV to decline. Single water leaching process is not appropriate to extract vanadium from high calcium type stone coal.

关键词： stone coal high calcium calcium vanadate leaching roasting calcium removal

Sb_(2)WO_(6)/BiOBr 2D nanocomposite S-scheme photocatalyst for NO removal

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Journal of Materials Science & Technology 2020年第21期56卷 236-243页

作者： Yanyu Wang Kai Wang Jinlong Wang Xiaoyong Wu Gaoke Zhang hubei key laboratory of mineral resources processing and environment State Key Laboratory of Silicate Materials for ArchitecturesWuhan University of TechnologyWuhan430070China

Photocatalysis technology is an efficient method for removing nitrogen oxides at low ***,dimension-matched Sb_(2)WO_(6)/BiOBr photocatalysts were synthesized at room temperature via precipitation-deposition *** visible light irradiation,the as-obtained Sb_(2)WO_(6)/Bi OBr photocatalysts showed enhanced photocatalytic performance compare with the pure Sb_(2)WO_(6) and BiOBr for removal of *** optimal ratio for photocatalytic performance of Sb_(2)WO_(6)/BiOBr composite was found to be 30 wt.%of Sb_(2)WO_(6),which showed excellent recycling property even after 5 ***,in situ DRIFT was carried out to reveal the time-dependent evolution of reaction intermediates during photocatalytic NO *** probable photocatalytic mechanism was considered based on the active species capture *** enhanced photocatalytic performance for the Sb_(2)WO_(6)/BiOBr composite photocatalyst perhaps is attributed to the interaction between BiOBr and Sb2WO6 and S-scheme charge transfer path.

关键词： Sb_(2)WO_(6) BiOBr Photocatalytic NO removal S-scheme

Effects of the mineral phase and valence of vanadium on vanadium extraction from stone coal

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International Journal of minerals,Metallurgy and Materials 2012年第10期19卷 893-898页

作者： Yang-jia Hu Yi-min Zhang Shen-xu Bao Tao Liu College of resources and environmental Engineering Wuhan University of Technology Wuhan 430070 China hubei key laboratory of mineral resources processing and environment Wuhan 430070 China

The influence of roasting on the leaching rate and valence of vanadium was evaluated during vanadium extraction from stone coal. Vanadium in stone coal is hard to be leached and the leaching rate is less than 10% when the raw ore is leached by 4 moUL H2SO4 at 90℃ for 2 h. After the sample is roasted at 900℃ for 2 h, the leaching rate of vanadium reaches the maximum, and more than 70% of vanadium can be leached. The crystal of vanadium-bearing mica minerals decomposes and the Content of V（V） increases with the rise of roasting temperature from 600 to 900℃, therefore the leaching rate of vanadium increases significantly with the decomposition of the mica minerals. Some new phases, anorthite for example, form when the roasting temperature reaches 1000℃. A part of vanadium may be enwrapped in the sintered materials and newly formed phases, which may impede the oxidation of low valent vanadium and make the leaching rate of vanadium drop dramatically. The leaching rate of vanadium is not only determined by the valence state of vanadium but also controlled by the decomposition of vanadium-bearing minerals and the existence state of vanadium to a large extent.

关键词： vanadium metallurgy stone coal leaching ore roasting

A novel Cu_(1.5)Mn_(1.5)O_(4)photothermal catalyst with boosted surface lattice oxygen activation for efficiently photothermal mineralization of toluene

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Nano Research 2023年第2期16卷 2133-2141页

作者： Qiang Cheng Zhuangzhuang Wang Xiaotian Wang Jiaming Li Yuan Li Gaoke Zhang Shenzhen Research Institute Hubei Key Laboratory of Mineral Resources Processing and EnvironmentState Key Laboratory of Silicate Materials for ArchitecturesWuhan University of TechnologyWuhan 430070China

Developing a novel photothermal catalyst for efficient mineralization of volatile organic compounds(VOCs)is of great significance to control air ***,for the first-time,a spinel Cu_(1.5)Mn_(1.5)O_(4)nanomaterial with enhanced surface lattice oxygen activation was successfully obtained by a novel light-driven in situ reconstruction strategy from its precursor(CuMnO_(2))for efficient toluene mineralization.X-ray diffraction(XRD)and high-resolution transmission electron microscopy(HRTEM)analyses confirm that the CuMnO_(2)phase was converted into spinel Cu1.5Mn1.5O4 phase under full spectrum light ***–visible–near infrared ray(UV–vis–NIR)spectroscopy,X-ray photoelectron spectroscopy(XPS)analysis,and density functional theory(DFT)calculations determine that the strong near-infrared absorption ability and low dissociation energy of oxygen bond in Cu_(1.5)Mn_(1.5)O_(4)are beneficial to its surface lattice oxygen ***,O2-temperature programmed desorption(TPD)and in situ diffuse reflectance infrared transform spectroscopy(DRIFTS)further indicate that the surface lattice oxygen of the Cu_(1.5)Mn_(1.5)O_(4)is easily activated under light irradiation,which can promote ring opening of *** research endows a new design of photothermal nanomaterial with enhanced lattice oxygen activation for deep oxidation of VOCs.

关键词： Cu_(1.5)Mn_(1.5)O_(4)nanomaterial surface lattice oxygen light-driven photothermal catalysis volatile organic compounds

Synthesis of montmorillonite-chitosan hollow and hierarchical mesoporous spheres with single-template layer-by-layer assembly

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Journal of Materials Science & Technology 2019年第10期35卷 2325-2330页

作者： Peng Chen Yunliang Zhao Tianxing Chen Tingting Zhang Shaoxian Song hubei key laboratory of mineral resources processing and environment Wuhan University of TechnologyWuhan 430070China School of resources and environmental Engineering Wuhan University of TechnologyWuhan 430070China

In order to develop a facile and precisely controlled approach to synthesize hierarchical mesoporous materials with tailored property, in this work, a novel study was carried out to fabricate montmorillonitechitosan hollow and hierarchical mesoporous spheres(MMTNS@CS-HMPHS) based on single-template layer-by-layer(Lb L) assembly. Scanning electron microscopy(SEM), transmission electron microscopy(TEM), specific surface area analysis and X-ray photoelectron spectroscopy(XPS) analyses were carried out to characterize the morphology and surface properties of MMTNS@CS-HMPHS. Benefitting from the unique lamellar structure of MMTNS, mesoporous channels are formed on the shell of MMTNS@CS hollow spheres, resulting in high surface area. Moreover, the surface functionalization and pore size of MMTNS@CS-HMPHS can be easily tuned, due to the tailored property through Lb L assembly *** the unique microstructure, MMTNS@CS-HMPHS also possesses the active sites generated from both MMT and chitosan, which greatly promotes its performance in fields of adsorption, drug delivery and catalyst supports, etc.

关键词： Montmorillonite Chitosan LbL assembly MMTNS@CS-HMPHS

Facet-dependent activation of oxalic acid over hematite nanocrystals under the irradiation of visible light for efficient degradation of pollutants

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Journal of environmental Sciences 2024年第8期142卷 204-214页

作者： Zhixiong Yang Yuan Li Xiaotian Wang Jiaming Li Jiquan Wang Gaoke Zhang hubei key laboratory of mineral resources processing and environment State Key Laboratory of Silicate Materials for ArchitecturesWuhan University of TechnologyWuhan 430070China hubei Engineering Consulting Co. Ltd.Wuhan 430071China

Naturally occurring hematite has been widely studied in the Fenton-like system for water pollutant remediation due to its abundance and ***,its inadequate catalytic activity results in difficulty in effectively degrading pollutants in the catalytic degradation system that it ***,we constructed a photochemical system composed of hematite with{001}facet of high activity facet and low-cost and non-toxic oxalic acid(OA)for the removal of various types of *** removal rate for the degradation of metronidazole,tetracycline hydrochloride,Rhodamine B,and hexavalent chromium by hematite nanoplate with the exposed{001}facet activating OA under visible light irradiation was 4.75,2.25,2.33,and 2.74 times than that by the exposed{110}facet,*** functional theory(DFT)calculation proved that the OA molecule was more easily adsorbed on the{001}facet of hematite than that on the{110}facet,which would favor the formation of the more Fe(Ⅲ)-OA complex and reactive *** addition,the reactive site of metronidazole for the attraction of radicals was identified on the basis of the DFT calculation on the molecular occupied orbitals,and the possible degradation pathway for metronidazole included carbon chain fracture,hydroxyethyl-cleavage,denitrogenation,and ***,this finding may offer a valuable direction in designing an efficient iron-based catalyst based on facet engineering for the improved activity of Fenton-like systems such as OA activation.

关键词： Hematite Facet exposure Oxalic acid activation Fenton-like system Pollutant removal

Characteristics of Cationic Red X-GRL Adsorption by Diatomite Tailings

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Journal of Wuhan University of Technology(Materials Science) 2017年第5期32卷 1038-1047页

作者：郑仁基高惠民 GUAN Junfang REN Zijie TIAN Jingjing School of resources and environmental Engineering Wu'han University of Technology Wuhan 430070 China hubei key laboratory of mineral resources processing and environment Wuhan 430070 China

As secondary mineral resources, diatomite tailings（DT） got from the Linjiang region of China were prepared and characterized by SEM, XRF and XRD. Mono-factor experiments were carried out to investigate the effects of the operation factor, including contact time, adsorbent concentration, initial p H value of the dye solutions, adsorption temperature and initial concentration of cationic Red X-GRL（X-GRL） on the adsorption of X-GRL. The adsorption kinetics, isotherms, thermodynamics and mechanisms for X-GRL were also studied. It was efficient for DT to adsorb X-GRL from aqueous solutions, and it was even discovered to have higher adsorptivity for X-GRL than diatomite concentrate（DC） in our previous test. The adsorption processes fit very well with the pseudo-second-order model and the Langmuir isotherm equation. In addition, various thermodynamic parameters, such as standard Gibbs free energy（ΔG°）, standard enthalpy（ΔH°） and standard entropy（ΔS°） have been calculated. From thermodynamic studies, it was seen that the adsorption was spontaneous and endothermic. The main driving forces of the physical adsorption on DT are electrostatic attraction. The reason why DT showed higher adsorptivity for X-GRL than DC was that there were more clay mineral particles within, which has a remarkable ability of dye adsorption due to its high surface area. DT as a cheap absorbent for X-GRL removal would replace or partially replace the activated carbon.

关键词： diatomite tailings cationic red X-GRL adsorption

Natural tourmaline activated peracetic acid for efficient degradation of sulfadiazine: Reaction mechanisms and catalyst reusability

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Progress in Natural Science:Materials International 2023年第4期33卷 458-466页

作者： Zhendong Chen Liuyang He Shitai Shen Desong Zhang Zhuqi Chen Li Wu Lie Yang hubei key laboratory of mineral resources processing and environment School of Resources and Environmental Engineering Wuhan University of Technology School of environmental Science and Engineering Huazhong University of Science and Technology key laboratory of Vegetation Ecology of the Ministry of Education School of Environment Northeast Normal University

Peracetic acid(PAA) has received extensive attention in the water treatment due to its high oxidation potential and low toxicity of by-products. In this study, natural non-toxic mineral tourmaline(TM) was used to activate PAA to remove sulfadiazine(SDZ). The TM/PAA system could remove 92 % SDZ in 120 min. The radical analysis confirmed the co-existence of both free radical and non-free radical degradation pathways in the TM/PAA system,indicating that singlet oxygen(1O2) and acetyl(per)oxy radicals(CH3C(O)O· and CH3C(O)OO·) were the main reactive oxygen species. The Fe2+/Fe3+ratio on the TM surface decreased during the degradation of SDZ due to Fe2+consumption. The effect of water matrix on SDZ removal indicated that Cl-, SO42-and NO3-posed little effect on SDZ removal, while CO32-inhibited SDZ removal by affecting pH. Particularly, humic acid(HA) slightly promoted SDZ removal. Ten by-products of SDZ were identified by HPLC-MS/MS, and four possible transformation pathways(SO2detachment, S–N breakage, amino acid oxidation, and hydroxylation) were *** was recycled five times and the removal of SDZ remained above 85 %, confirming its excellent *** work indicates the TM/PAA system is of great potential for the application on the organic contaminant removal.

关键词： Peracetic acid Tourmaline Singlet oxygen Organic radicals