Hubei Key Laboratory of Mineral Resources Processing and Environment

Wuhan, China

Hubei Key Laboratory of Mineral Resources Processing and Environment

Wuhan, China
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Liu C.,Wuhan University of Technology | Jia F.,Wuhan University of Technology | Jia F.,Hubei Key Laboratory of Mineral Resources Processing and Environment | Wang Q.,Wuhan University of Technology | And 3 more authors.
Applied Materials Today | Year: 2017

Two-dimensional (2D) molybdenum disulfide might be highly capable of lead removal from wastewater due to the huge sulfur-rich surface area. An attempt was made to explore the feasibility of using 2D molybdenum disulfide as a super adsorbent in water in this work. Adsorption isotherm and kinetics and SEM-EDS were conducted to investigate Pb(II) adsorption capacity at the interface of 2D molybdenum disulfide/water, and XPS was used to study the adsorption mechanism. The results indicated that 2D molybdenum disulfide had a dramatic efficiency for Pb(II) removal from water with a 1479 mg/g adsorption capacity. The adsorption followed the Freundlich isotherm model and fitted well with both the pseudo-first-order and pseudo-second-order kinetics models. The adsorption might be attributed to the chemical adsorption due to the complexation of Pb(II) with intrinsic S or O atoms exposed on 2D molybdenum disulfide surfaces, together with electrostatic adsorption. © 2017


Li Y.,Wuhan University of Technology | Li Y.,Autonomous University of San Luis Potosi | Li Y.,Weihai Ocean Vocational College Haiwan | Xia L.,Wuhan University of Technology | And 5 more authors.
RSC Advances | Year: 2017

In this study, the effect of the growth phase on the Pb(ii) removal performance from water using Chlorella sp. QB-102 dry biomass was investigated. Optimum biosorption conditions were determined as a function of initial solution pH and contact time. Freundlich isotherm and pseudo-second-order kinetics models were found to be most applicable to Pb(ii) adsorption on biomass from each growth phase. The maximum adsorption capacities of Pb(ii) were found to be 205.5, 298.5 and 171.9 mg g-1 for logarithmic, stable and decline phases of biosorbents, respectively. The FT-IR, XPS and potentiometric titration results showed that the lack of phosphoryl groups caused the lowest adsorption efficiency for the decline phase, and the more effective active sites in carboxyl and higher site concentrations of hydroxyl and phosphoryl functional groups led to most of the bioadsorption occurring during the stable phase. Thus, algal biomass from the stable phase can be used as a potential adsorbent for heavy metal removal from water. © The Royal Society of Chemistry 2017.


Jia F.,Wuhan University of Technology | Jia F.,Hubei Key Laboratory of Mineral Resources Processing and Environment | Wang Q.,Wuhan University of Technology | Wu J.,Wuhan University of Technology | And 3 more authors.
ACS Sustainable Chemistry and Engineering | Year: 2017

One feature of two-dimensional (2D) molybdenum disulfide nanosheets is the huge sulfur-rich surface area, which might lead to the strong adsorption of Hg2+ in water, because the sulfur on the surfaces could strongly bind to Hg2+. In this work, the adsorption of Hg2+ on 2D molybdenum disulfide sheets in water has been studied in order to develop a novel and efficient adsorbent for removing Hg2+ from water. The study was performed through the measurements of adsorption isotherm and kinetics, atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy-energy-dispersive spectroscopy (SEM-EDS). The partially oxidized 2D molybdenum disulfide sheets with less than five S-Mo-S layers were prepared through the exfoliation of natural molybdenite. AFM observations illustrated a fast and multilayer Hg2+ adsorption on the surface of 2D molybdenum disulfide. The results of adsorption tests and SEM-EDS have indicated that 2D molybdenum disulfide was a superb adsorbent. The adsorption followed the Freundlich isotherm model and fitted well with pseudo-second-order kinetics model. The excellent Hg2+ capture property was mainly attributed to the complexation of Hg2+ with intrinsic S and oxidation-induced O atom exposed on 2D molybdenum disulfide surfaces, as well as the electrostatic interaction between negatively charged 2D molybdenum disulfide and cation Hg2+. © 2017 American Chemical Society.


Wu P.,Wuhan University of Technology | Wu J.,Wuhan University of Technology | Xia L.,Hubei Prov Collaborative Innovation Center For High Efficient Utilization Of Vanadium Resources | Liu Y.,First Peoples Hospital of Xiushui County | And 3 more authors.
RSC Advances | Year: 2017

In this work, a new adsorbent, Mg/Fe/La hydrotalcite-like compound (defined as Mg/Fe/La HLc), was synthesized with a facile one-step hydrothermal method for removing fluoride from water. Several measurements, such as XRD, FT-IR, SEM, XPS and N2 adsorption-desorption technique, were used to characterize the adsorbent and to approach into the adsorption of fluoride at the interface of water with calcined Mg/Fe/La hydrotalcite-like compound (defined as Mg/Fe/La CHLc). The experimental results have shown that the adsorption was well described by the pseudo-second-order model and followed Langmuir isotherm. The maximum adsorption capacity reached 60 mg g-1, and the desorption could be easily realized in a aqueous Na2CO3 solution, indicating that the Mg/Fe/La CHLc could be used as a potential adsorbent for effectively removing fluoride from water. The mechanisms of the adsorption might be attributed to the chemisorption due to the complexation of fluoride in water with lanthanum on the surfaces of the Mg/Fe/La CHLc, besides of the surface adsorption and interlayer adsorption due to the "memory effect" of hydrotalcite. In addition, it was found that the element of lanthanum in the adsorbent played a great role in the adsorption of fluoride in water. © 2017 The Royal Society of Chemistry.


Tao J.,Wuhan University of Technology | Qin L.,Wuhan University of Technology | Liu X.,Wuhan University of Technology | Li B.,Wuhan University of Technology | And 5 more authors.
Bioresource Technology | Year: 2017

The granulation of activated sludge and effect of granular activated carbon (GAC) was investigated under the alternative anaerobic and aerobic conditions. The results showed that GAC accelerated the granulation, but had no obvious effect on the bacterial community structure of granules. The whole granulation process could be categorized into three phases, i.e. lag, granulation and granule maturation phase. During lag period GAC provided nuclei for sludge to attach, and thus enhanced the morphological regularization of sludge. During granulation period the granule size increased significantly due to the growth of bacteria in granules. GAC reduced the compression caused by the inter-particle collisions and thus accelerate the granulation. GAC has no negative effect on the performance of SBR, and thus efficient simultaneous removal of COD, nitrogen and phosphorus were obtained during most of the operating time. © 2017


Bao S.,Wuhan University of Technology | Bao S.,Hubei Key Laboratory of Mineral Resources Processing and Environment | Tang Y.,Wuhan University of Technology | Zhang Y.,Wuhan University of Technology | And 3 more authors.
Chemical Engineering and Technology | Year: 2016

The recovery and separation of metals from aqueous solutions is one of the research hotspots in hydrometallurgy, environment protection, analytical chemistry, etc. Much attention has been paid to solvent-impregnated resins (SIRs) since these were firstly proposed for the extraction of metals. SIRs are characterized by high efficiency and selectivity, convenient preparation, and easy operation because they combine the unique advantages of solvent extraction and ion exchange. The preparation and features of SIRs are summarized and their applications in the extraction of various metals from solutions are reviewed. In addition, the equilibrium, thermodynamics, and sorption kinetics of the metals onto SIRs are elucidated in detail. Copyright © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim


Zhang Y.,Wuhan University of Technology | Zhang Y.,Hubei Key Laboratory of Mineral Resources Processing and Environment | Hu Y.,Wuhan University of Technology | Bao S.,Wuhan University of Technology | Bao S.,Hubei Key Laboratory of Mineral Resources Processing and Environment
Minerals Engineering | Year: 2012

The characteristics of the vanadium-bearing stone coal during chlorination roasting at different temperature were investigated. Chlorination roasting could promote the breakage of the structure of the main vanadium-bearing minerals, such as muscovite and illite, in the stone coal and more than 90% of the vanadium was lost after the sample was roasted in chlorine at 1000°C for 1 h. The volatile collected on the inner surface of the tube is mainly composed of chlorine, vanadium and other metals and it shows similar physical and chemical properties to vanadium oxytrichloride (VOCl 3). Hence, it is reasonable to predict that the vanadium was emitted as VOCl 3 in this process. The anhydrite gradually decomposed with the increasing temperature and the hematite in the samples reacted with the chlorine and disappeared above 700°C. Some new refractory mineral phases such as cordierite and hornblende can be found during the chlorination roasting. The decrease in the fluxing minerals and the formation of the refractory minerals can elevate the ash-fusion temperature of the stone coal and make it hard to sinter. © 2012 Elsevier Ltd. All rights reserved.


Liang L.,Wuhan University of Technology | Bao S.,Wuhan University of Technology | Bao S.,Hubei Key Laboratory of Mineral Resources Processing and Environment | Zhang Y.,Wuhan University of Technology | And 3 more authors.
Chemical Engineering Research and Design | Year: 2016

Separation and recovery of V(IV) from the synthetic sulfuric acid solutions containing Fe(III) and Al(III) were investigated using the bis(2-ethylhexyl)phosphoric acid (D2EHPA)-impregnated resin (DIR). It is confirmed that D2EHPA was incorporated to the support by comparing the characteristics of the support resin and DIR using thermogravimetric analysis (TGA) and Fourier transform infrared spectra (FT-IR), respectively. Batch experiments proved that the adsorption capacity of Fe(III) on the DIR was by far higher than that of V(IV) and Al(III), and the separation factor of Fe(III) to V(IV) reached the plateau at the pH ranging from 1.0 to 1.2, which provided feasibility for the V(IV) separation from the solutions by column mode. During the preferential removal of Fe(III) by the DIR, it was shown that effective Fe(III) removal can be achieved at feed flow rate of 1.0 mL/min, column height of 18 cm and solutions pH 1.0. Subsequently, 1.5 mol/L H2SO4 and 30 g/L H2C2O4 was appropriate for the stepwise elution of partial loaded V(IV) and Fe(III), respectively. The iron-removed effluent was combined with the following eluted vanadium-bearing solutions and then was further processed by the DIR. Finally, the vanadium-rich solutions were obtained by stripping with 1.0 mol/L H2SO4. The total recovery of vanadium was 91.47% and it was concentrated almost 5 times. This study provides potential method for the separation and recovery of V(IV) from acid aqueous solutions by solvent impregnated resins. © 2016 The Institution of Chemical Engineers


Hu Y.-J.,Wuhan University of Technology | Zhang Y.-M.,Wuhan University of Technology | Zhang Y.-M.,Hubei Key Laboratory of Mineral Resources Processing and Environment | Bao S.-X.,Wuhan University of Technology | And 3 more authors.
International Journal of Minerals, Metallurgy and Materials | Year: 2012

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 mol/L H 2SO 4 at 90°C for 2 h. After the sample is roasted at 900°C 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°C, 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°C. 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. © 2012 University of Science and Technology Beijing and Springer-Verlag Berlin Heidelberg.


Han S.,Wuhan University of Technology | Zhang Y.,Wuhan University of Technology | Zhang Y.,Hubei Key Laboratory of Mineral Resources Processing and Environment | Bao S.,Wuhan University of Technology | Bao S.,Hubei Key Laboratory of Mineral Resources Processing and Environment
Xiyou Jinshu/Chinese Journal of Rare Metals | Year: 2013

The sodium salt roasting-water leaching-dilute acid leaching experiment was adopted to extract vanadium from high calcium vanadium-bearing stone coal from Hubei. When the stone coal was roasted with 10% sodium chloride, at 850°C for 2 h, the water leaching rate of vanadium was only 14.28%, and the total leaching rate of vanadium was 69.14%. In order to improve the water leaching rate of vanadium, calcium removal and calcium stabilization before roasting were investigated. After calcium removal by 5% (volume fraction) of HCl and calcium stabilization by 2% (volume fraction) of H2SO4 separately, the decarbonized stone coal was roasted with sodium chloride under the same condition, as a result, the water leaching rate of vanadium reached 47.54% and 35.01%, and the total leaching rate of vanadium reached 66.16% and 60.81%, respectively. XRD results showed that the lime disappeared after calcium removal by HCl, therefore the water leaching rate of vanadium increased obviously and the optimal roasting temperature could be reduced. The results also showed that the lime disappeared after calcium stabilization by H2SO4, and the semi-hydrated gypsum started to emerge. The formation of CaSO4 could inhibit the formation of the water-insoluble substances, such as calcium vanadate, thus the water leaching rate of vanadium increased slightly, the sintering temperature could be raised and the sintering of roasting materials also could be lightened. However, the total leaching rate of vanadium decreased a little, and CaSO4 decomposed when adding a certain dosage of sodium chloride, which resulted in the water leaching rate of vanadium dropping. Under the same roasting conditions, the water leaching rate of vanadium of the calcium removal sample by HCl was higher than that of the calcium stabilization sample by H2SO4.

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