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Gan L.,Fujian Normal University | Gan L.,Fujian Key Laboratory of Pollution Control and Resource Reuse | Cao D.,Fujian Normal University | Jin X.,Fujian Normal University | And 3 more authors.
Huanjing Kexue Xuebao/Acta Scientiae Circumstantiae | Year: 2015

As green synthesized monodisperse iron oxide nanoparticles (IONPs) was easy to aggregate, in this study, cationic (etyltrimethylammonium bromide (CTAB)) and anionic surfactant (sodium dodecyl sulphate (SDS)) were used as dispersing and stabilizing agents to improve the function of IONP and increase the adsorption of phosphate from aqueous solution. The removal efficiency of phosphate by CTAB-IONP was 92.47% under an initial phosphate concentration of 20 mg·L-1, reaction temperature of 25 ℃. In addition, removal efficiency of phosphate using SDS-IONP slightly decreased to 79.38%, while 81.94% was observed by IONP. The SEM images showed that average particle sizes of IONP, CTAB-IONP, SDS-IONP were 180 nm, 90 nm, 60 nm, respectively, while EDS, UV-vis, FTIR and Zeta potential demonstrated that these surfactants improve the IONP particle size, enhance the dispersity and change the surface charge of IONP. Furthermore, the results of kinetic study show that the adsorption was following the pseudo-second order. Finally, surfactants are potential to control the reactivity of IONP in green synthesis and prove a new insight of green synthesis for in-situ environmental remediation. ©, 2015, Science Press. All right reserved.


She C.,Fujian Normal University | She C.,Fujian Key Laboratory of Pollution Control and Resource Reuse | Wang J.,Fujian Normal University | Tong C.,Fujian Normal University
Wetland Science | Year: 2015

Sulphate-reducing bacteria (SRB) are anaerobic microorganisms that use sulphate as a terminal electron acceptor in, for example, the degradation of organic compounds. They are ubiquitous in anoxic habitats, where they have an important role in both the sulphur and carbon cycles. Traditional methods based on laboratory culture techniques have been proven inadequate to describe the vast microbial diversity, because those methods miss more than 99% of the organisms while enriching those thriving in cultures but not numerically or functionally important in the environment. Introduction of molecular methods independent of culture techniques has vastly improved the potential to describe microbial diversity. The 16S ribosomal RNA (rRNA) gene is by far the most frequently used phylogenetic marker for studying microbial ecology and diversity in the environment. An additional approach includes the sequencing of functional genes that are unique to the physiology of the group of microorganisms studied. Sulphate-reducing bacteria have been characterized by employing the 16S rRNA gene or functional genes as molecular markers in soils of wetlands. Studies to date have differentiated communities by analysis of clone libraries or by community fingerprinting by terminal restriction fragment length polymorphism (T-RFLP) or by denaturing gradient gel electrophoresis (DGGE) relying on differences in restriction fragment lengths between taxa. Additionally, fluorencence in situ hybridization (FISH) and real-time quantitative polymerase chain reaction (real-time qPCR) have also been applied for quantification of wetland-inhabiting sulphate-reducing bacteria. In plant-inhabited soils or sediments of the wetlands, a particularly important microhabitat is the rhizosphere, or region immediately surrounding and influenced by the plant roots. Key biogeochemical processes such as organic matter decomposition and pollutant degradation occur at accelerated rates in the rhizosphere and greatly influence ecosystem functions. This paper reviews two types of important marker genes of sulphate-reducing bacteria in molecular detection and the molecular biological tools used for detecting the diversity of sulphate-reducing bacteria in soils of the wetlands, such as T-RFLP, DGGE, FISH and real-time qPCR. At the same time, the interaction between sulfate-reducing bacteria and plants in the wetland are also summarized. Based on review of the literature, further studies on diversity of sulphate-reducing bacteria in soils of wetlands are suggested.


Luo Y.,Fujian Normal University | Luo Y.,Fujian Key Laboratory of Pollution Control and Resource Reuse | Qian Q.,Fujian Key Laboratory of Pollution Control and Resource Reuse | Qian Q.,Fujian Normal University | And 2 more authors.
Materials Research Bulletin | Year: 2015

A series of Al2O3-50 wt% CexZr1-xO2 (x = 0.1, 0.3, 0.5, 0.7 and 0.9) mixed oxides and pure alumina as supports were prepared by conversional coprecipitation. The corresponding Pd catalysts were investigated in deep oxidation of methanol and characterized by BET, H2-TPR, O2-TPD, CO2-TPD and CH3OH-TPSR techniques. The catalytic tests reveal that Pd/Al-Ce0.3Zr0.7O2 exhibits the best catalytic activity. It is mainly attributed to a strong interaction between noble metal and support in the Pd/Al-Ce0.3Zr0.7O2 catalyst, resulting in more reducible species and active sites at low temperature. Additionally, the relatively better textural property, more activated surface oxygen and more strong basic sites are favorable to the deep methanol oxidation. © 2014 Elsevier Ltd. All rights reserved.


Lin X.T.,Fujian Normal University | Qian Q.R.,Fujian Normal University | Qian Q.R.,Fujian Key Laboratory of Pollution Control and Resource Reuse | Xiao L.R.,Fujian Normal University | And 5 more authors.
Advanced Materials Research | Year: 2014

Glycidyl methacrylate (GMA) grafted ethylene-octene multi-block copolymer (OBC) in the presence of the styrene (St) monomer (OBC-g-(GMA-co-St)) was prepared and then used as a compatibilizer for recycled Poly(ethylene terephthalate)/Polypropylene (R-PET/PP) blends. The morphological, rheological and mechanical properties of the blends were investigated. The results show that the compatibilization between R-PET and PP blends is improved by the introduction of OBC-g-(GMA-co-St). The SEM results show that all R-PET/PP blends exhibit a matrix-dispersed droplet type morphology, and the addition of OBC-g-(GMA-co-St) results in a finer morphology and better adhension between the phases. In addition, the storage moduli (G'), loss moduli (G") and the Charpy impact strength of the blends increase with increasing OBC-g-(GMA-co-St) content, while the the flexural strength decreases slightly. © (2014) Trans Tech Publications, Switzerland.


Zeng L.,Fujian Normal University | Zeng L.,Fuzhou University | Zeng L.,Fujian Key Laboratory of Pollution Control and Resource Reuse | Huang X.,Fujian Normal University | And 7 more authors.
ACS Applied Materials and Interfaces | Year: 2016

Germanium-based nanostructures are receiving intense interest in lithium-ion batteries because they have ultrahigh lithium ion storage ability. However, the Germanium-based anodes undergo the considerably large volume change during the charge/discharge processes, leading to a fast capacity fade. In the present work, a Ge/GeO2-ordered mesoporous carbon (Ge/GeO2-OMC) nanocomposite was successfully fabricated via a facile nanocasting route by using mesoporous carbon as a nanoreactor, and was then used as an anode for lithium-ion batteries. Benefited from its unique three-dimensional meso-nano structure, the Ge/GeO2-OMC nanocomposite exhibited large reversible capacity, excellent long-time cycling stability and high rate performance. For instance, a large reversible capacity of 1018 mA h g-1 was obtained after 100 cycles at a current density of 0.1 A g-1, which might be attributed to the unique structure of the Ge/GeO2-OMC nanocomposite. In addition, a reversible capacity of 492 mA h g-1 can be retained when cycled to 500 cycles at a current density of 1 A g-1. © 2015 American Chemical Society.


Luo Y.,Fujian Normal University | Luo Y.,Fujian Key Laboratory of Pollution Control and Resource Reuse | Wang X.,Fuzhou University | Qian Q.,Fujian Normal University | And 3 more authors.
International Journal of Hydrogen Energy | Year: 2014

A series of LaNi1-xFexO3 (x = 0.0, 0.2, 0.4, 0.7, and 1.0) perovskites were synthesized and characterized by X-ray diffraction (XRD), N2 physisorption, scanning electron microscopy (SEM), H2-temperature-programmed reduction (H2-TPR), and X-ray photoelectron spectroscopy (XPS). The perovskites were investigated for selective catalytic reduction of NOx by hydrogen (H2-SCR). It is shown that Fe addition into LaNiO3 leads to a promoted efficiency of NOx removal, as well as a high stability of perovskite structure. Moreover, easy reduction of Ni3+ to Ni2+ with the aid of appropriate Fe component mainly accounts for the enhanced activity. Meanwhile, deactivation of the sulfated catalysts is due to that sulfates mainly deposit on active Ni component while doping of Fe can protect Ni to some extent at the expense of partial sulfation. © 2014 Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.


Luo Y.,Fujian Normal University | Luo Y.,Fujian Key Laboratory of Pollution Control and Resource Reuse | Wang K.,Fujian Key Laboratory of Pollution Control and Resource Reuse | Xu Y.,Fujian Key Laboratory of Pollution Control and Resource Reuse | And 4 more authors.
New Journal of Chemistry | Year: 2015

CuO-CeO2 nanofibers with relatively high surface area (EL-CuCe) have been successfully prepared by the electrospinning method and investigated for total benzene oxidation. The improved low-temperature performance of EL-CuCe compared to ST-CuCe (prepared by the surfactant-templated method) is attributed to the better reducibility of Cu ions that are incorporated into the ceria lattice. Moreover, more oxygen vacancies and weakly bound oxygen species (e.g., O2 -, O2 2- or O-) observed on EL-CuCe keep in step with its higher low-temperature oxidation activity. However, without small amounts of bulk CuO, reduction of some surface ceria occurs at 480 °C for EL-CuCe, which probably accounts for its unsatisfactory high temperature performance. © The Royal Society of Chemistry and the Centre National de la Recherche Scientifique 2015.


Yu B.,Fujian Normal University | Jin X.,Fujian Normal University | Jin X.,Fujian Key Laboratory of Pollution Control and Resource Reuse | Kuang Y.,Fujian Normal University | And 2 more authors.
Chinese Journal of Environmental Engineering | Year: 2014

In our previous study, naphthalene was degraded by Bacillus fusiformis (BFN) strain. However, the understanding of degradation of naphthalene is still limited, therefore, in this study, we further explored the process. Results showed that the growth of BFN increased with the increasing concentration of naphthalene. When naphthalene concentrations were 30, 50, 100 and 200 mg/L, biomass (OD600) were 0.057, 0.081, 0.126 and 0.193, respectively. Nevertheless, the removal efficiency of COD decreased with the increasing the concentration of naphthalene, indicating that naphthalene was used as its sole carbon source. The biodegradation of naphthalene fitted well to the first-order kinetic model while the growth kinetics of BFN satisfied well to the logistic model. Furthermore, SEM, UV and FT-IR were employed to characterize the degradation of naphthalene. SEM indicated that the morphology of cells grew better in the presence of naphthalene. UV-vis showed that adsorption peak of naphthalene at 276 nm significantly declined after degradation. Finally, FT-IR data demonstrated that the new bands at 2878, 2930, 2968, 3438, 3667 and 3731 cm-1 were formed, confirming that carboxyl group and phenolic compounds were existed in degraded solution.


Zeng L.,Fujian Normal University | Zeng L.,Fujian Key Laboratory of Pollution Control and Resource Reuse | Deng C.,Fuzhou University | Zheng C.,Fuzhou University | And 6 more authors.
Materials Research Bulletin | Year: 2015

Abstract In the present work, SnCo-CMK nanocomposite was successfully synthesized for the first time via a simple nanocasting route by using mesoporous carbon as nano-reactor. The nanocomposite was then characterized by means of X-ray diffraction (XRD), thermogravimetric analysis (TG), N2 adsorption-desorption, scanning and transmission electron microscopy (SEM/TEM) respectively. Furthermore, the SnCo-CMK nanocomposite exhibited large reversible capacities, excellent cycling stability and enhanced rate capability when employed as an anode material for lithium-ion batteries. A large reversible capacity of 562 mA h g-1 was obtained after 60 cycles at a current density of 0.1 A g-1 which is attributed to the structure of 'meso-nano' SnCo-CMK composite. This unique structure ensures the intimate contact between CMK and SnCo nanoparticles, buffers the large volume expansion and prevents the aggregation of the SnCo nanoparticles during cycling, leading to the excellent cycling stability and enhanced rate capability. © 2015 Elsevier Ltd.


Xue H.,Fujian Normal University | Xue H.,Fujian Key Laboratory of Pollution Control and Resource Reuse | Chen Y.,Fujian Normal University | Chen Y.,Fujian Key Laboratory of Pollution Control and Resource Reuse | And 11 more authors.
Catalysis Communications | Year: 2016

Sr1.36Sb2O6 nano-octahedrons were successfully prepared via a facile hydrothermal method from Sb2O5. The as-prepared Sr1.36Sb2O6 was characterized by X-ray diffraction (XRD), UV-vis diffuse reflectance spectra (DRS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM) and energy dispersive spectrometer (EDS). Acidity of the precursor mixture had a positive effect on crystallization of Sr1.36Sb2O6. RuO2-loaded Sr1.36Sb2O6 showed photocatalytic activity for overall water splitting without adding hole scavengers to produce H2 and O2 under Xenon lamp irradiation. Sr1.36Sb2O6 prepared at low pH exhibited superior photocatalytic activity possibly due to its high degree of crystallization. © 2015 Published by Elsevier B.V.

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