Weijun Tian
Ocean University of China
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Featured researches published by Weijun Tian.
Journal of Environmental Management | 2013
Weijun Tian; Jie Bai; Huimei Sun; Yangguo Zhao
Sustainability assessments of coastal beach exploitation are difficult because the identification of appropriate monitoring methodologies and evaluation procedures is still ongoing. In particular, the most suitable procedure for the application of sustainability assessment to coastal beaches remains uncertain. This paper presents a complete sustainability assessment process for coastal beach exploitation based on the analytic hierarchy process (AHP). We developed an assessment framework consisting of 14 indicators derived from the three dimensions of suitability, economic and social value, and ecosystem. We chose a wind power project on a coastal beach of Yancheng as a case study. The results indicated that the wind power farms on the coastal beach were not completely in keeping with sustainable development theory. The construction of the wind power farms had some negative impacts. Therefore, in the design stage, wind turbines should be designed and planned carefully to minimize these negative impacts. In addition, the case study demonstrated that the AHP was capable of addressing the complexities associated with the sustainability of coastal beaches.
Ecotoxicology and Environmental Safety | 2018
Kaili Qiao; Weijun Tian; Jie Bai; Jie Dong; Jing Zhao; Xiaoxi Gong; Shuhui Liu
EP-biochar was produced from Enteromorpha prolifera (EP) at temperatures of 200-600°C under limited-oxygen conditions and then activated using HCl and HF. To optimize the sorption of pyrene (PYR) and benzo[a]pyrene (BaP), the effect of the pyrolysis temperature was studied, and the results showed that EP-biochar produced at 500°C gave the highest removal efficiency. The physiochemical properties of EP-biochar pyrolyzed at 500°C were characterized. The examination indicated that the surface area of EP-biochar was 205.32m2/g. The effect of the EP-biochar dosage and initial solution pH on the adsorption were studied in batch adsorption experiments. Kinetic studies indicated that the adsorption processes of PYR and BaP agreed well with a pseudo second-order kinetic model. The sorption equilibrium data were well described by the Langmuir model. Desorption experiments were conducted to test the strength of binding interactions of EP-biochar. The results showed that PYR and BaP were difficult to dissolve in water after adsorption. Regeneration experiments demonstrated that the biochars regenerated at 200°C retained approximately 48% and 40% of their initial PYR and BaP uptake.
Marine Pollution Bulletin | 2017
Xin Jin; Weijun Tian; Qing Liu; Kaili Qiao; Jing Zhao; Xiaoxi Gong
To remove benzo[a]pyrene (BaP) that has accumulated in the Jiaozhou Bay wetland sediment, two strains (JB1 and JB2) were selected from the BaP-contaminated the wetland sediment and immobilized in coal cinder and chitosan beads using entrapping and surface adsorption methods. Biodegradation of BaP in sediment was carried out in pots. The results showed that, supported by the coal cinder and chitosan beads, 71.9, 65.5, 58.9 and 66.1% of the BaP in the immobilized cells was degraded after 40d. These percentages were clearly higher than the 47.7% that degraded from free cells. Kinetic analysis indicated that the immobilized gel-beads might remove BaP by multiple control steps. Compared to the chitosan, coal cinder-entrapping beads exhibited a higher removal rate for BaP; however, the degradation rates from coal cinder- and chitosan-surface adsorption beads were almost the same. This result indicates that in addition to the BaP-degrading bacteria, carrier materials and immobilizing methods play an important role in determining the success of a biodegradation strategy.
Ecotoxicology and Environmental Safety | 2017
Weijun Tian; Jing Zhao; Yuhang Zhou; Kaili Qiao; Xin Jin; Qing Liu
Changes in root exudates, including low molecular weight organic acids (LMWOAs), amino acids and sugars, in rhizosphere soils during the gel-beads/reeds combination remediation for high molecular weight polycyclic aromatic hydrocarbons (HMW-PAHs) and the degree of the effects on HMW-PAH biodegradation were evaluated in this study. The results showed that the gel-beads/reeds combination remediation notably increased the removal rates of pyrene, benzo(a)pyrene and indeno(1,2,3-cd)pyrene (65.0-68.9%, 60.0-68.5% and 85.2-85.9%, respectively). During the removal of HMW-PAHs, the LMWOAs, particularly maleic acid, enhanced the biodegradation of HMW-PAHs. Arginine and trehalose monitored in reed root exudates promoted the growth of plants and microorganisms and then improved the removal of HMW-PAHs, especially pyrene. However, the contribution of reed root exudates on degradation of 5- and 6-ring PAHs was minor. These results indicated that the utilization of root exudates was certainly not the only important trait for the removal of HMW-PAHs.
Marine Pollution Bulletin | 2017
Xiao Huang; Jie Bai; Kuiran Li; Yangguo Zhao; Weijun Tian; Jiajia Dang
To achieve a better contaminant removal efficiency in a low-temperature and high-salt environment, two novel strains of cold- and salt-tolerant ammonia-oxidizing bacteria (AOB), i.e., Ochrobactrum sp. (HXN-1) and Aquamicrobium sp. (HXN-2), were isolated from the surface sediment of Liaohe Estuarine Wetland (LEW), China. The optimization of initial ammonia nitrogen concentration, pH, carbon-nitrogen ratio, and petroleum hydrocarbons (PHCs) to improve the ammonia-oxidation capacity of the two bacterial strains was studied. Both bacterial strains showed a high ammonia nitrogen removal rate of over 80% under a high salinity of 10‰. Even at a temperature as low as 15°C, HXN-1 and HXN-2 could achieve an ammonia nitrogen removal rate of 53% and 62%, respectively. The cold- and salt-tolerant AOB in this study demonstrated a high potential for ammonia nitrogen removal from LEW.
international conference on consumer electronics | 2011
Weijun Tian; Jie Bai; Xiaoyun Cao; Yangguo Zhao; Huimei Sun
The exploitation of coastal beach plays a great role in promoting the development of local economy. The employment of different development modes of coastal beach will in different degrees influence local resources, environment, ecosystem stability, economic and social development and so on. Therefore, the choice of a scientific and rational model is particularly important to the exploitation of coastal beach. The research used the scenario analysis method to choose the prospect of sustainability exploration mode taking Yancheng City as an case. The probable scenarios of agriculture, aquaculture, chemical industry and eco-tourism for each scenario were analyzed and the influences on the natural conditions of coastal beaches, social environment and self-development advantages of Yancheng city were evaluated. The results showed that the complex model compositing with agriculture, aquaculture, farming&seafood processing and biomass was chosen based on the status quo of the exploitation of coastal beach in Yancheng city. And the eco-tourism development model should be chosen.
Ecotoxicology and Environmental Safety | 2012
Weijun Tian; Jie Bai; Kunkun Liu; Huimei Sun; Yangguo Zhao
Ecological Engineering | 2014
Weijun Tian; Yangguo Zhao; Huimei Sun; Jie Bai; Yongmei Wang; Chenglin Wu
Journal of Environmental Management | 2016
Weijun Tian; Kaili Qiao; Huibo Yu; Jie Bai; Xin Jin; Qing Liu; Jing Zhao
Desalination and Water Treatment | 2016
Yongmei Wang; Weijun Tian; Chenglin Wu; Jie Bai; Yangguo Zhao