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PubMed | CAS Institute of Geographical Sciences and Natural Resources Research, Heilongjiang Provincial Research Institute of Environmental Science, University of Strasbourg and Southern Trunk Channel Management Office of South to North Water Diversion Project
Type: Journal Article | Journal: International journal of environmental research and public health | Year: 2016

In this study, the Mudan River, which is the most typical river in the northern cold region of China was selected as the research object; Environmental Fluid Dynamics Code (EFDC) was adopted to construct a new two-dimensional water quality model for the urban sections of the Mudan River, and concentrations of COD(Cr) and NHN during ice-covered and open-water periods were simulated and analyzed. Results indicated that roughness coefficient and comprehensive pollutant decay rate were significantly different in those periods. To be specific, the roughness coefficient in the ice-covered period was larger than that of the open-water period, while the decay rate within the former period was smaller than that in the latter. In addition, according to the analysis of the simulated results, the main reasons for the decay rate reduction during the ice-covered period are temperature drop, upstream inflow decrease and ice layer cover; among them, ice sheet is the major contributor of roughness increase. These aspects were discussed in more detail in this work. The model could be generalized to hydrodynamic water quality process simulation researches on rivers in other cold regions as well.


Tang G.,CAS Institute of Geographical Sciences and Natural Resources Research | Tang G.,University of Strasbourg | Tang G.,University of Chinese Academy of Sciences | Zhu Y.,CAS Institute of Geographical Sciences and Natural Resources Research | And 5 more authors.
International Journal of Environmental Research and Public Health | Year: 2016

In this study, the Mudan River, which is the most typical river in the northern cold region of China was selected as the research object; Environmental Fluid Dynamics Code (EFDC) was adopted to construct a new two-dimensional water quality model for the urban sections of the Mudan River, and concentrations of CODCr and NH3N during ice-covered and open-water periods were simulated and analyzed. Results indicated that roughness coefficient and comprehensive pollutant decay rate were significantly different in those periods. To be specific, the roughness coefficient in the ice-covered period was larger than that of the open-water period, while the decay rate within the former period was smaller than that in the latter. In addition, according to the analysis of the simulated results, the main reasons for the decay rate reduction during the ice-covered period are temperature drop, upstream inflow decrease and ice layer cover; among them, ice sheet is the major contributor of roughness increase. These aspects were discussed in more detail in this work. The model could be generalized to hydrodynamic water quality process simulation researches on rivers in other cold regions as well. © 2016 by the authors, licensee MDPI, Basel, Switzerland.


Zhang M.,Northeast Forestry University | Tian X.,Northeast Forestry University | Tian X.,Mudanjiang Normal College | Li Y.,Northeast Forestry University | Li Y.,Heilongjiang Provincial Research Institute of Environmental science
Acta Theriologica Sinica | Year: 2010

The DNA sex of wild wapiti was determined by PCR amplification of the SRY genes of 76 feces samples. Among of them, 49 samples were identified as male, and the others as female. All fecal pellets presented one of two shapes: bullet-like and jujube-stone like. The bullet-like fecal pellets displayed a short thick form with a low length/width ratio. The jujube-stone like ones displayed a thin long form with high length/width ratio. Using these shapes, the 76 samples were divided into two groups: 51 bullet-like and 25 jujube-stone like feces. All the samples were clustered by the ratio of averaged length and width, and then the discrimination equation was established. The statistical results showed that the consistent degree of sex determination by fecal statistic index and DNA method was 79.71%, while morphological method and real sex was 90.56%. So, the bullet-like pellets are from male wapiti, and the jujube-stone like ones from females. Our results show that wapiti sex can be directly determined by its pellet shape in the wild. At the same time, the discrimination equation could be used as associated method.


Cao J.-L.,Chinese Research Academy of Environmental Sciences | Xi B.-D.,Chinese Research Academy of Environmental Sciences | Xu Q.-G.,Chinese Research Academy of Environmental Sciences | Wang Z.-B.,Heilongjiang Provincial Research Institute of Environmental science | And 3 more authors.
Huanjing Kexue/Environmental Science | Year: 2011

Based on current researches, described the sources, toxicities, analytical methods and occurrence of PFOA and PFOS in wastewater treatment plants, lakes, rivers, coastal areas and tap waters in different countries in the world. According to the limited concentrations of PFOA+PFOS in effluents of wastewater treatment plants (WTPs) put forward by Germany, the concentrations of PFOA+PFOS in WTP effluents in Singapore, Germany, Korea and England were assessed. The results showed that the concentrations of PFOA+PFOS in WTP effluents in Singapore were higher than the liminted concentration of 300 μg/L. Researches done by China, Japan, USA, and other countries showed that the concentrations of POFA and PFOS in rivers and coastal areas reached to ng/L, and the concentrations in Tennessee River, USA were the highest, reached to 100 ng/L. The risk assessments of PFOA and PFOS in tap water in some cities in China were assessed according to the risk quotients (RQ). The assessment results showed that tap waters from 19 cities in China were all below the risk level.


Cheng X.,Beijing Forestry University | Ye J.,Harbin Institute of Technology | Sun D.,Beijing Forestry University | Chen A.,Heilongjiang Provincial Research Institute of Environmental science
Chinese Journal of Chemical Engineering | Year: 2011

A group of Zn-Al layered double hydroxides (LDHs) were synthesized at different temperatures from 25-90 °C in order to investigate the influence of synthesis temperature on characteristics of the LDHs and their phosphate adsorption behaviour. The results reveal that an increase in the synthesis temperature generally improves the specific surface area of the sample and the phosphate adsorption capacity. The significantly enhanced crystallinity of the Zn-Al-30, synthesized at 30 °C, leads to a remarkable decrease in the specific surface area and consequently a poor phosphate adsorption capacity. It is suggested that the surface adsorption plays an important role in the phosphate uptake by the Zn-Al LDHs. Zn-Al-70 presents a relatively higher crystallinity and a lower specific surface area, compared with Zn-Al-60 and Zn-Al-80, but the highest phosphate adsorption capacity, indicating that surface adsorption is only one of the pathways for phosphate removal. The phosphate adsorption by the Zn-Al follows a pseudo-second-order kinetic equation. The adsorption isotherms fit Langmuir models, and the maximum adsorption capacities of the Zn-Al-25, Zn-Al-50 and Zn-Al-70 are estimated to be 17.82, 21.01 and 27.10 mg·g -1 adsorbent, respectively.


Zhang X.,Harbin Institute of Technology | Tian Y.,Harbin Institute of Technology | Wang Q.,Heilongjiang Provincial Research Institute of Environmental science | Lin H.,Harbin Institute of Technology
Ecological Engineering | Year: 2013

The main objective of this study was to determine the adaptability and sludge reduction potential of the tubificid worm Limnodrilus hoffmeisteri for different conditions of aeration, temperature and worm density, as well as to determine and characterize the development and population dynamics of the worms during sequential sludge predations. A number of short- and long-term experiments were conducted using waste sludge as the support material. The results demonstrated that improper aeration, temperature and worm density can remarkably affect worm growth and sludge reduction. Adult worms were more susceptible to variable environmental conditions. Continuous individual growth and development of the worms were observed under optimal process conditions: intermittent aeration with light intensity, a water temperature of 25. °C and an initial worm density in the range of 11-12. g/L. As calculated in a stage-structured population model, the asymptotic population growth rate of the worms was approximately 1 during a period of 117 days, which indicates a stable population size in the sludge predation system. The worm population exhibited a total sludge reduction rate of 297.0. ±. 10.1. mg-TSS/L/d. © 2013 Elsevier B.V.


Zhang X.-Q.,Harbin Institute of Technology | Tian Y.,Harbin Institute of Technology | Wang Q.,Heilongjiang Provincial Research Institute of Environmental science
Zhongguo Huanjing Kexue/China Environmental Science | Year: 2014

Sludge reduction can be achieved through the predation by oligochaeta worm-Limnodrilus sp.. To analyze the effect of aeration intensity on the process of sludge predation, changes in worm activity, sludge properties and sludge reduction efficiency under different intensities of aeration were investigated. The results showed that these worms had limited tolerance to aeration intensity. The number of injured worms increased with the increasing aeration intensity and retention time in sludge, and fewer injured individuals (1.7% of the total)was found under the mild intermittent aeration. The lactate dehydrogenate activity of worms was higher under the aeration intensity of 2.8~9.5 m3/(m2·h), which may imply the higher level of material metabolism and energetic consumption of the worms at those aeration conditions. Less nitrate accumulation was found in the supernatant of sludge during the predation under the lower aeration intensity, and the increase in sludge volume index (SVI) caused by lack of dissolved oxygen was restrained by the worms, showing their performance for improving sludge settling. The sludge reduction of worms for the intermittent aeration of 2.8 m3/(m2·h) was more stable than those for continuous aerations.


Zhang X.,Harbin Institute of Technology | Tian Y.,Harbin Institute of Technology | Wang Q.,Heilongjiang Provincial Research Institute of Environmental science
Harbin Gongye Daxue Xuebao/Journal of Harbin Institute of Technology | Year: 2013

To analyze the growth characteristics and predation potential of tubificid worms as the predator for excess sludge, the variations in the growth, respiratory rate and sludge reduction efficiency of such worms under different pH value, temperature, carrier thickness and light intensity were investigated. The results showed that the worms could live in a pH range from 4 to 8, and therefore might have adaptability to the pH change in practical sewage sludge. The respiratory rate of worms reached the maximum at 25 °C, indicating the higher biological activity at this temperature. The worm immobilization and performance for sludge reduction were improved by the carrier with 1 cm of thickness, where only 3.8% of the total worms left. Natural light had no significant effect on the sludge predation by worms. But strong light was not recommended by which the escape and hiding behavior of worms had been caused. The optimal sludge reduction efficiency was above 27%.


Qiu S.,Harbin Institute of Technology | Zeng H.,Heilongjiang Provincial Research Institute of Environmental Science | Liu Z.,Harbin Institute of Technology | Xu S.,Harbin Institute of Technology | Ma F.,Harbin Institute of Technology
Harbin Gongye Daxue Xuebao/Journal of Harbin Institute of Technology | Year: 2014

According to the characters of HABS industrial wastewater of high pH, high COD and high concentration of sulfite, a pilot reactor with catalytic oxidation-Fenton combined treatment process was built, and the pilot scale experiments were employed to discuss the optional parameters. A pilot scale is 5 t/d. After optimized, the optimal optional parameters in catalytic oxidation stage were pH 8, aeration rate 50 m3/h, HRT 90 min. The optimal optional parameters in Fenton stage were dosage of H2O2(30%) 1.00 mL/L. The effluent quality can meet the first class requirements of Sewage Discharge Standard in GB8978-1996, which suggests the process is economical and feasible.


Zhang X.,Harbin Institute of Technology | Tian Y.,Harbin Institute of Technology | Wang Q.,Heilongjiang Provincial Research Institute of Environmental science | Chen L.,Harbin Institute of Technology | Wang X.,Harbin Institute of Technology
Bioresource Technology | Year: 2012

Changes in heavy metal distribution and speciation during the reduction of sewage sludge with the worm, Limnodrilus hoffmeisteri were assessed. In sludge containing 108.3. ±. 2.2, 455.5. ±. 10.3, and 39.4. ±. 1.8. mg/kg of Cu, Zn, and Pb, respectively, more than 81% of these metals remained in the sludge after predation by the worms, while 4.1-9.7% of these metals were released into the liquid. The maximum uptake values of Cu, Zn, and Pb by the worms reached 180.5, 587.4, and 55.8. mg/kg, respectively. The predation did not increase metal bioavailability in the final sludge as reflected by a 9.5-12.5% decrease in labile Cu and unchanged levels in labile Zn and Pb. The sewage sludge reduction efficiency of L. hoffmeisteri was 27.6-29.2%. These results indicated the relatively moderate changes in speciation and distribution of Cu, Zn, and Pb and the stable performance of worms in reducing sewage sludge. © 2012 Elsevier Ltd.

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