Zhang D.,University of Sheffield |
Ding A.,Beijing Normal University |
Cui S.,Beijing Normal University |
Hu C.,Liaoning Academy of Environmental science |
And 4 more authors.
Water Research | Year: 2013
Accidents involving the release of crude oil to seawater pose serious threat to human and animal health, fisheries and marine ecosystems. A whole cell bioreporter detection method, which has unique advantages for the rapid evaluation on toxicity and bioavailability, is a useful tool to provide environmental risk assessments at crude oil-contaminated sites. Acinetobacter baylyi ADPWH-alk and ADPWH-recA are chromosomally-based alkane and genotoxicity bioreporters which can be activated to express bioluminescence in the presence of alkanes and genotoxic compounds. In this study, we applied Acinetobacter ADPWH-alk and ADPWH-recA bioreporters to examine six seawater and six sediment samples around the Dalian Bay four weeks after an oil tank explosion in Dalian, China in 2010, and compared the results with samples from the same sites one year after. The results of bioreporter detection suggest that seawater and sediments from five sites (DB, NT, JSB, XHP and FJZ) four weeks after the oil-spill were contaminated by the crude oil with various extents of genotoxicity. Among these six sites, DB and NT had high oil contents and genotoxicity, and JSB had high oil content but low genotoxicity in comparison with an uncontaminated site LSF, which is located at other side of the peninsula. These three sites (DB, NT and JSB) with detectable genotoxicity are within 30 km away from the oil spill point. The far-away two sites XHP (38.1 km) and FJZ (31.1 km) were lightly contaminated with oil but no genotoxicity suggesting that they are around the contamination boundary. Bioreporter detection also indicates that all six sites were clean one year after the oil-spill as the alkane and genotoxicity were below detection limit. This study demonstrates that bioreporter detection can be used as a rapid method to estimate the scale of a crude oil spill accident and to evaluate bioavailability and genotoxicity of contaminated seawater and sediments, which are crucial to risk assessment and strategic decision-making for environmental management and clean-up. © 2012 Elsevier Ltd.
Zhao X.,Harbin Institute of Technology |
Zhao X.,Liaoning Academy of Environmental science |
Xing D.,Harbin Institute of Technology |
Liu B.,Harbin Institute of Technology |
And 3 more authors.
International Journal of Hydrogen Energy | Year: 2012
The effects of Fe 2+, Mg 2+ ions and l-cysteine on hydrogen production and cell growth of Clostridium beijerinckii RZF-1108 were investigated, and [FeFe]-hydrogenase (hydA) gene expression under different conditions was evaluated using quantitative reverse transcription PCR (qRT-PCR). Best concentration of Fe 2+ stimulated hydrogen production, cell biomass and hydA gene expression in C. beijerinckii RZF-1108. Mg 2+ increased cell growth and hydrogen evolution, but negatively facilitated hydrogen production rate and hydA gene expression. l-cysteine slightly stimulated hydA gene expression, but not hydrogen production in strain RZF-1108. A maximum hydrogen yield of 1.96 mol H 2/mol glucose and production rate of 106.0 ml H 2/l medium·h -1 were obtained using optimized culture medium supplemented with 0.2 g/l FeSO 4·7H 2O and 0.1 g/l MgCl 2·6H 2O. These experimental results suggested that the effects of metal ions on hydrogen production by C. beijerinckii RZF-1108 was complicated. Hydrogen production was highly dependent on the cooperation of cell growth and hydrogenase gene expression. Highlights: The effects of Fe 2+, Mg 2+ ions and l-cysteine on hydrogen production. Fe 2+ stimulated hydrogen production, cell biomass and hydA gene expression. H 2 production was dependent on cell growth and hydrogenase gene expression. © 2012 Hydrogen Energy Publications, LLC.
Wang X.,Shenyang University |
Su D.,Liaoning Academy of Environmental science |
Li H.,Shenyang University
Advanced Materials Research | Year: 2012
Take the project of campus sewage ecological treatment and reuse in Shenyang University for example, this paper expounds on the design of the combined process of intensified pretreatment with biological contact oxidation (BCO) process and ecological treatment with subsurface wastewater infiltration system (SWIS). The operation performance showed that the project worked stable and the pollutants were removed effectively. The effluent quality achieved the designed goals and met the national standards of GB/T 18918-2002 and GB 18921-2002 of China. The project has set up a kind of typical technological model for small-scale decentralized wastewater treatment and reuse. © (2012) Trans Tech Publications, Switzerland.
Zhang Y.,Dalian University of Technology |
Cai X.,Dalian University of Technology |
Lang X.,Liaoning Academy of Environmental science |
Qiao X.,Dalian University of Technology |
And 2 more authors.
Environmental Pollution | Year: 2012
Co-contamination of ligand-like antibiotics (e.g.; tetracyclines and quinolones) and heavy metals prevails in the environment, and thus the complexation between them is involved in environmental risks of antibiotics. To understand toxicological significance of the complex, effects of metal coordination on antibiotics' toxicity were investigated. The complexation of two antibiotics, oxytetracycline and ciprofloxacin, with three heavy metals, copper, zinc, and cadmium, was verified by spectroscopic techniques. The antibiotics bound metals via multiple coordination sites and rendered a mixture of various complexation speciations. Toxicity analysis indicated that metal coordination did modify the toxicity of the antibiotics and that antibiotic, metal, and their complex acted primarily as concentration addition. Comparison of EC50 values revealed that the complex commonly was highest toxic and predominately correlated in toxicity to the mixture. Finally, environmental scenario analysis demonstrated that ignoring complexation would improperly classify environmental risks of the antibiotics. © 2012 Elsevier Ltd. All rights reserved.
Wang S.,Dalian University of Technology |
Xu L.,Dalian University of Technology |
Yang F.,Dalian University of Technology |
Wang H.,Liaoning Academy of Environmental science
Science of the Total Environment | Year: 2014
Considering the limitation of the traditional method to assess the ecological carrying capacity and the complexity of the water ecological system, we used system dynamics, ANN, and CA-Markov to model a water ecological system. The social component was modeled according to Granger causality test by system dynamics. The natural component consists of the water resource and water environmental capacity, which were forecasted through the prediction of precipitation and change in land use cover. The interaction of the social component and the natural component mainly reflected environmental policies, such as the imposition of an environmental fee and environmental tax based on their values. Simulation results showed the different assessments on water ecological carrying capacity under the two policies. The population grew (2.9million), and less pollution (86,632.37t COD and 2854.5t NH4N) was observed with the imposition of environmental tax compared with the imposition of an environmental fee (2.85million population, 10,8381t COD and 3543t NH4N) at the same GDP level of 585billionCNY in 2030. According to the causality loop, we discussed the different states under the policies and the reasons that caused the differences in water ecological carrying capacity state. According to game theory, we explained the limitation of the environmental fee policy on the basis of marginal benefit and cost. The externality was cleared up by the environmental tax policy. © 2013 Elsevier B.V.
Lin Q.H.,Tianjin University |
Cheng H.,Liaoning Academy of Environmental science |
Chen G.Y.,Tianjin University
Journal of Analytical and Applied Pyrolysis | Year: 2012
Microwave heating technology is considered as a cost-effective alternative way for preparing activated carbon from organic solid wastes. In this study, a pilot-scale microwave heating apparatus with the processing capacity of 5 kg solid waste was constructed to prepare carbonaceous adsorbents from sewage sludge, and the effects of important microwave processing parameters and chemical activation treatments on the quality and yield of resultant carbonaceous adsorbents were investigated with the aim of technological industrialization. The surface properties and chemical compositions of the carbonaceous adsorbents were characterized using nitrogen adsorption, iodine adsorption, scanning electron microscopy, X-ray fluorescence, and Fourier-transform infrared spectroscopy. The microwave heating process could be clearly classed into three stages, i.e. drying, low-temperature pyrolysis, and carbonization. The increase of carbonization temperature reduced the contents of oxygen-containing functional groups in sludge-based adsorbents. The optimum carbonization temperature was 600°C, and a higher carbonization temperature (700°C) gave rise to a detrimental impact on the quality of sludge-based adsorbents, in terms of specific surface area, total pore volume and iodine value. Activation treatment with KOH, ZnCl 2 and H 3PO 4 achieved the better development of porous texture. The sludge-based adsorbent prepared via KOH activation at carbonization temperature of 600°C presented the highest BET surface area of 130.7 m 2 g -1 and the highest total pore volume of 0.13 mL g -1. However, according to the results of batch adsorption experiment, the sludge-based adsorbents prepared via H 3PO 4 activation acted as the best adsorbent to adsorb Cu 2+ and Pb 2+ from aqueous solutions. © 2011 Elsevier B.V. All rights reserved.
Wang Y.,Liaoning Beifang Envirnnmental Protection Co. |
Shi Y.M.,Liaoning Beifang Envirnnmental Protection Co. |
Zhao J.,Liaoning Academy of Environmental science
Advanced Materials Research | Year: 2014
Liaohe River is one of seven big river in China, its environmental pollution control is an important task all the time. In this paper, Liaohe River basin ecological footprint was introduced, water quality and ecological restoration measures were analyzed in the period of the 9th Five-Year, the 10th Five-Year and the 11th Five-Year, the development on ecological restoration in the 12th Five-Year was put forward. © (2014) Trans Tech Publicutions, Switzerland.
Zhang H.,Liaoning Academy of Environmental Science |
Jiang X.,Liaoning Academy of Environmental Science
Advanced Materials Research | Year: 2014
The recognition and sensing of biologically and environmentally important species has emerged as a significant goal in the field of chemical sensors in recent years1. Fluorogenic methods in conjunction with suitable probes are preferable approaches for the measurement of these analytes because fluorimetry is rapidly performed, is nondestructive, is highly sensitive, is suitable for high-throughput screening applications2,3. We synthesized rhodamine derivatives compounds by a Schiff base reaction. © (2014) Trans Tech Publications, Switzerland.
Shi Y.,Liaoning Academy of Environmental science
Applied Mechanics and Materials | Year: 2011
SCRUBBER substitution in on-line H 2S analyzer was prepared as modified treatment molecular sieve in the media of some buffer solutions, by ionic of acetates exchanged in the solution. Results showed that this substitution was satisfied for H 2S analyzer on-line, and better than America's, with 99.9% of scrubbing SO 2 and 99.4% of transforming H 2S. © (2011) Trans Tech Publications.
Wang H.,Liaoning Academy of Environmental science |
Jia Y.,Shenyang University of Chemical Technology
Environmental Science and Pollution Research | Year: 2016
The bioavailability of heavy metals strongly depends on their speciation in the environment. Adsorption (ADS) and coprecipitation (CPT) on amorphous metal hydroxides are important processes, controlling the fates of heavy metals in an aqueous environment. This work studied the bioavailability of Cu, Cd, Ni, and Pb adsorbed on and/or coprecipitated with amorphous iron and iron/aluminum mixed hydroxides to the wetland plant Phragmites australis. After a 13-day treatment, there was an apparent uptake of the heavy metals by the plant, and the amount of metal bioaccumulation was measurably different for different association forms (ADS vs. CPT). The bioaccumulation of Cd associated with Fe0.5Al0.5(OH)3 was greater than that with Fe(OH)3; the adsorbed metals were found to be more bioavailable than the coprecipitated forms for most of the treatments while the aging treatment significantly reduced the bioaccumulation of ADS metals. In the single metal treatment, root metal concentrations in the Fe(OH)3 ADS system followed the order Ni (68 mg kg−1) > Cu (32 mg kg−1) > Cd (28 mg kg−1) > Pb (9 mg kg−1), while the CPT system followed the order of Cu (30 mg kg−1) > Ni (22 mg kg−1) > Pb (9 mg kg−1) > Cd (7 mg kg−1). The order of metal accumulation in a combined metal treatment was similar to that for single metal treatments, but observed Ni concentration declines by 22 and 71 % and Cu and Cd concentrations increase by 30 and 50 % (for CPT and ADS treatments, respectively), while Pb concentrations increased by 30~50 % in both of them. When treated with low-molecular-weight organic acids (LMWOAs), metal desorption, indicative of metal oxide bonding strength and metal bioavailability, was consistent with metal accumulation in the plant. © 2016 Springer-Verlag Berlin Heidelberg