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Wang Y.,Wuhan University of Technology | Wang Y.,Luoyang Ship Material Research Institute | Huang G.,Luoyang Ship Material Research Institute | Cheng X.,Wuhan University of Technology | And 5 more authors.
Journal of the Chinese Society of Corrosion and Protection | Year: 2013

In order to improve the corrosion resistance of coating and prolong its life in the marine environment. Zn-Ni composite coatings including different nickel content were prepared by oxyacetylene flame spraying process, with Zn-Ni composite powders which were prepared by spray-dried process. The protection performance and corrosion mechanism of the Zn-Ni composite coatings in seawater were tested by means of potentiodynamic polarization and electrochemical impedance, and with the analysis of SEM, EDS and XRD. Results shown that the stable corrosive potential of the coatings finally ranges from -0.98 V to -0.95 V. The presence of nickel can play a role that restrain the dense Zn(OH)2 to be converted into the loose ZnO. At the same time, the coatings resistance Rc and charge transfer resistance Rt are both being increased and causing the coatings corrosion current being decreased gradually with the accumulation of corrosion products. Corrosion resistances of these coatings with different nickel content are obviously different, and the anti-corrosion properties of the coating with 20 mass% Ni is best.


Yu L.,CAS Qingdao Institute of Oceanology | Yu L.,SunRui Marine Environment Engineering Co. | Duan J.,CAS Qingdao Institute of Oceanology | Du X.,CAS Qingdao Institute of Oceanology | And 2 more authors.
Electrochemistry Communications | Year: 2013

Many microbial species can use cathodes as electron donors for metabolism. This direct electron transfer (DET) pathway has rarely been proposed in biocorrosion processes. DET from Q235 carbon steel to the sulfate-reducing bacteria (SRB) Desulfovibrio caledoniensis and its effect on the corrosion behavior of carbon steel were investigated in the present study. Electroactive SRB biofilm was found to play a key role in the ennoblement of the corrosion potential (Ecorr) and in the acceleration of the corrosion rate, indicating that SRB mainly affected the cathodic reaction of low carbon steel corrosion. In addition, SRB biofilm obtained electrons from carbon steel electrode polarized at - 0.74 V. These findings present new evidence for DET between SRB biofilm and carbon steels. © 2012 Elsevier B.V. All rights reserved.


Wei L.-L.,Harbin Institute of Technology | Wang G.-Z.,Harbin Institute of Technology | Jiang J.-Q.,Harbin Institute of Technology | Li G.,Chongqing University | And 4 more authors.
Desalination and Water Treatment | Year: 2014

Excessive nitrogen and phosphorus discharge into natural water from wastewater treatment plants still have the potential of causing eutrophication. How to remove those excessive nitrogen and phosphorus in an appropriate way is welcome in practice. This study co-removed nitrate and phosphorus via the operation of commercial 201 × 7 exchange resin column, and recovered phosphate simultaneously. Experimental results demonstrated that the adsorption of (Formula presented.)-P onto the 201 × 7 resin satisfactorily fitted to Freundlich isotherm, while (Formula presented.)-N followed Langmuir model, with a maximum adsorption capacity of 12.47 mg/g for (Formula presented.)-P and 107.59 mg/g for (Formula presented.)-N, respectively. Up to 92% of (Formula presented.)-P and 90% of (Formula presented.)-N in the secondary effluent were recovered by 201 × 7 resin column under the optimal flow rate of 50 BV/h. The exhausted 201 × 7 resin could be regenerated by 5% NaCl within 1 h at a flow rate of 15 BV/h. Moreover, this regeneration would guarantee the effluent (Formula presented.)-P and (Formula presented.)-N are lower than the breakthrough points even when 1175 BV wastewater passed the resin column. These findings are of great significance for ensuring stricter effluent phosphorus and total nitrogen discharge criteria. © 2014 © 2014 Balaban Desalination Publications. All rights reserved.


Li X.,Ocean University of China | Li Z.,Ocean University of China | Li C.,Ocean University of China | Wang L.,Ocean University of China | And 4 more authors.
Shiyou Xuebao, Shiyou Jiagong/Acta Petrolei Sinica (Petroleum Processing Section) | Year: 2012

Fex 3+-TiO2/Shell photocatalysts with Fe3+-doped TiO2 film supporting on the regular structured seashell-based adsorbent were successfully synthesized by wet-impregnation-calcination method, and characterized by XRD, SEM-EDS and UV-Vis techniques. The effects of Fe3+ doped amount(x), coated times of Fex 3+-TiO2 and illumination time on photocatalytic activity of Fex 3+-TiO2/Shell for oil degradation were investigated. The results showed that the Fe0.7 3+-TiO2/shell with four coated times of Fe0.7 3+-TiO2 possessed the highest photocatalytic activity for oil degradation. After 16 h illumination with 300 W iodine-tungsten lamp, the oil degradation rate on the seawater reached 76%.


Wang L.,Ocean University of China | Gao J.,Sunrui Marine Environment Engineering Co. | Li C.-H.,Ocean University of China | Feng L.-J.,Ocean University of China | Yang J.-J.,Ocean University of China
Ranliao Huaxue Xuebao/Journal of Fuel Chemistry and Technology | Year: 2014

CuO/SC catalysts were prepared by incipient wetness impregnation and characterized by BET, XRD and SEM. Their performance for NO oxidation was tested in a fixed bed reactor. The influence of CuO content, reaction temperature, space velocity, concentration of O2 and H2O on NO catalytic oxidation activity were investigated. The results show that CuO/SC with 1% CuO loading had the highest activity at 70 ℃, 5% of O2 and 1 000 h-1 of GHSV. In addition, the poisonous effect of water vapor on catalytic oxidation activity was also analyzed. When water vapor was introduced into the feed gas, breakthrough time is reduced from 15 h to 9.5 h. ©, 2014, Science Press. All right reserved.


Wang Z.,Qingdao University | Xia L.,Qingdao University | Xia J.,Qingdao University | An Z.,Sunrui Marine Environment Engineering Co. | Gong S.,Qingdao University
RSC Advances | Year: 2016

A hybrid anode integrating enzymatic hydrolysis of starch by glucoamylase and non-enzymatic oxidation of glucose by gold nanoparticles is presented to achieve an efficient cascade energy conversion from starch. The as-prepared biofuel cell shows a maximum power output of 91.4 μW cm-2. This enzymatic/non-enzymatic hybrid strategy can be employed to develop other polysaccharide or oligosaccharide fuel cells in which glucose oxidation is involved. © 2016 The Royal Society of Chemistry.


Duan D.,Luoyang Ship Material Research Institute | Duan D.,Sunrui Marine Environment Engineering Co. | Liu G.,Luoyang Ship Material Research Institute | Liu G.,Sunrui Marine Environment Engineering Co. | And 4 more authors.
Ocean Engineering | Year: 2016

The introduction of aquatic non-indigenous organisms and pathogens via ships ballast water is considered as a great treat to global marine ecosystems, costal economy and public health. This issue can be efficiently addressed by electrolytic treatment technology. In this work, the effects of organic compounds on inactivation efficacy of neutral electrolyzed water were studied by bench scale test and land-based test with Artemia salina as an indicator organism. In bench scale test, both glucose and chitosan significantly accelerated TRO decay of neutral electrolyzed water, while the other kinds of dissolved organic compounds (sodium citrate and sucrose) and particle organic compounds (corn starch) had no significant effect on TRO decay. Both glucose and chitosan weakened the inactivation efficacy of neutral electrolyzed water, especially at 24 h. The results of land-based test also indicated that the inactivation efficacy of ballast water management system not only depended on TRO initial concentration, but also on the property of organic compounds. The presence of glucose and chitosan indicated the need of high level of initial TRO concentration to reach good inactivation efficacy. The results of this study may be useful to decide the initial TRO concentration in ballast water treatment with electrolysis technology. © 2016 Elsevier Ltd


Gao J.,Sunrui Marine Environment Engineering Co. | Liu G.Z.,Sunrui Marine Environment Engineering Co. | Liu X.L.,Sunrui Marine Environment Engineering Co. | Xu S.,Sunrui Marine Environment Engineering Co. | Liu X.,Sunrui Marine Environment Engineering Co.
Advanced Materials Research | Year: 2014

SOX emission control of the marine exhaust gas can be achieved by post-processing desulfurization and LNG's usage. The two solutions are discussed by the technical and economic analysis. Four kinds of post-processing desulfurization have the differences on system composition, wastewater discharge, and applicable waters, absorbents and so on. The pay-off periods of post-processing desulfurization are ranged from 0.5 to 2.2 years, which depended on the ship type's difference. LNG's pay-off periods is about one year, but some hidden costs for LNG ship's promotion are difficult to estimate. © (2014) Trans Tech Publications, Switzerland.


Dai X.-H.,Shandong University | Zhang J.,Shandong University | Pang X.-J.,Shandong University | Zhou J.-P.,Shandong University | And 2 more authors.
Journal of Electroanalytical Chemistry | Year: 2015

In-situ electrolytic generation of chlorine is commercially adopted as an economic and effective method for treating ballast water (BW). An in-situ and rapid method for detecting total residual chlorine (TRC) is necessary for automatic control on the electrolysis. A polymer-coated electrode fabricated by coating a glassy carbon (GC) electrode with a polyvinyl chloride (PVC) coating that contains zephiran chloride (ZephCl) was prepared in this study. This all-solid ion-selective sensor was used to detect TRC in the simulated electrolytically treated BW. Results showed that adding ferrocene (Fc) in the PVC coating could significantly improve the response speed, reproducibility and stability of the electrode. The potential of the Fc-PVC-ZephCl-GC electrode was linearly proportional to the logarithm of TRC within the range of 1. mg/L to 20. mg/L. The interference of the dissolved oxygen and the possible co-existing ions in seawater was also evaluated without evident interference found. The response mechanism of the electrode, the enhancement of Fc and the failure mechanism of the electrode were discussed. The Fc-PVC-ZephCl-GC electrode could be used as a suitable sensor for the in-situ monitoring of TRC in the electrolytic treatment of BW. © 2015 Elsevier B.V.


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SunRui Marine Environment Engineering Co. | Date: 2014-08-25

Apparatus for disinfecting water; Aquarium filtration apparatus; Combination ozone sanitizer and electric deodorizing units; Ionization apparatus for the treatment of air; Purification installations for sewage; Sewage disposal plants; Sterilizers; Swimming pool chlorinating units; Water desalination plants; Water ionizers; Water purification installations; Water purification machines; Water sterilizers.

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