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Li Y.-L.,Henan Polytechnic University | Li Y.-L.,Beijing Normal University | Li Y.-F.,Institute of Chemical and Environment Engineering | Xu Z.-X.,Beijing Normal University
Huanjing Kexue/Environmental Science | Year: 2014

In June 2012, fishes was investigated at 65 sampling sites in the Huntai River basin in Northeast of China. Forty species were collected, belonging to 9 orders, 14 families,33 genera. Cobitidae and Cyprinidae were the dominant fishes in the community structure in the Huntai River basin, accounting for 13.21% and 65.83% of the fish community, respectively. There were two types of spatial distribution of fish community, one was distributed in the head water and tributaries in the upstream, and the other was in the plain rivers. Nemachilus nudus, Cobitis granoei and Phoxinus lagowskii dominated the local community in the upper reaches of the Dahuofang Reservoir and shenwo River, while Carassius ayratus and Hemiculter leucisculus dominated the local community in the plain rivers. CCA (canonical correspondence analysis) was used to distinguish the primary environmental variables that affected the fish community structure. The results indicated fish community was mainly affected by environment factors at watershed and reach scales. Proportions of woodland and urban land, and altitude were three important environmental factors affecting the fish community at the watershed scale. Dissolved oxygen, total nitrogen, pH and habitat inhomogeneity significantly affected the fish community at the reach scale, whereas substrate didn't show significant influence at the microhabitat scale. Environmental factors at watershed scale explained 7.66% of the variation of fish community structure, environmental factors at reach scale explained 10.57% of the variation of fish community structure. Environmental factors at reach scale influenced the fish community more significantly. Source


Luczka K.,Institute of Chemical and Environment Engineering | Grzmil B.,Institute of Chemical and Environment Engineering | Srenscek-Nazzal J.,Institute of Chemical and Environment Engineering | Kowalczyk K.,West Pomeranian University of Technology
Journal of Industrial and Engineering Chemistry | Year: 2013

Aluminium ammonium calcium phosphates were prepared with the use of AlCl3, CaCO3, H3PO4. The influence of the process parameters (pH 5±3, the molar ratios of Ca2+:Al+3:PO4 -3 in the substrates, respectively 0.31:0.62:1; 0.5:0.5:1; 0.72:0.36:1, temperature 40±20°C) on the phase composition and the product properties was determined. The process parameters that enable to obtain the material with expected physicochemical properties were determined based on the statistical evaluation of the experiments (fractional factorial design at three levels 3(k-p)27). The phase composition of the obtained samples was studied with the use of XRD analysis. The specific surface area was calculated with the use of SBET method and the particle size was determined by the laser scanning microscopy. The materials with the molar ratio of Al3+/NH4 + and Al3+/Ca2+ in the range of 0.70-27.93 and 0.47-24.48, respectively, with an absorption oil number of 95-157g/100g paraffin oil, the SBET within 25-118m2/g, the pore volume within 0.14-0.74cm3/g and the particle size in the range of 168-285nm were obtained. © 2012 The Korean Society of Industrial and Engineering Chemistry. Source


Markowska-Szczupak G.,Institute of Chemical and Environment Engineering | Ulfig K.,Technologies Polymer Institute | Janda K.,Pomeranian Medical University
Archives of Environmental Protection | Year: 2012

The study was to determine the effect of water activity (0.850; 0.900; 0.950; 0.995; and 0.999 aw) on the growth of T. lanuginosus on solid media containing different cellulose substrates (crystalline cellulose, carboxymethyl cellulose - CMC, filter paper, and sawdust) and xylan. The growth of isolates from coffee beans and garden composts were compared. All isolates did not grow on media with aw < 0.950. On media with \> 0.950, the hydrolysis zones were only observed on xylan and CMC. The highest daily growth and hydrolysis zone rates were mostly obtained at 0.995 aw and the lowest values were observed at 0.950 aw. The coffee beans isolates at 0.950 aw had the CMC hydrolysis coefficient 1.7-times higher than that for xylan. The fungal growth (FG) coefficient data indicate that the coffee beans isolates were able to utilize CMC and crystalline cellulose for growth and the highest growth rate was obtained at 0.999 a w. Subsequently, the compost isolates were able to grow on all substrates but the highest growth rate was obtained on CMC at 0.950 and 0.999 aw. Thus, coffee beans and composts provide T. lanuginosus isolates with various growth and hydrolytic zone rates in the range of 0.950-0.999 a w. © Copyright by Polish Academy of Sciences and Institute of Environmental Engineering of the Polish Academy of Sciences, Zabrze, Poland 2012. Source


Li Y.-L.,Henan Polytechnic University | Li Y.-L.,Beijing Normal University | Li Y.-F.,Institute of Chemical and Environment Engineering | Xu Z.-X.,Beijing Normal University
Huanjing Kexue/Environmental Science | Year: 2015

In May-June 2012, macroinvertebrates were investigated at 66 sampling sites in the Huntai River basin in Northeast of China. A total of 72 macrobenthos species were collected, of which, 51 species (70.83%) were aquatic insects, 10 species (13.89%) were mollusks, 7 species (9.72%) were annelids, and 4 species (5.56%) were arthropods. First, 13 candidate metrics (EPT taxa, Dominant taxon%, Ephemeroptera%, Trichoptera%, mollusks%, Heptageniidae/Ephemeroptera; Hydropsychidae/Trichoptera, Oligochaeta%, intolerant taxon%, tolerant taxon%, Collector%, Clingers%, Shannon-wiener index.) which belonged to six types were chosen to represent macroinvertebrate community structure by correlation analysis. Then, relationships between anthropogenic and physiography pressures and macroinvertebrate community structure variables were measured using redundancy analysis. Then, this study compared the relative influences of anthropogenic and physiographic pressures on macroinvertebrate community structure and the relative influences of anthropogenic pressures at reach, riparian and catchment scales by pRDA. The results showed all environmental factors explained 72.23% of the variation of macroinvertebrate community structure. In addition, a large proportion of the explained variability in macroinvertebrate community structure was related to anthropogenic pressures (48.9%) and to physiographic variables (11.8%), anthropogenic pressures at reach scale influenced most significantly macroinvertebrate community structure which explained 35.3% of the variation of macroinvertebrate community structure. pH, habitat, TN, CODMn, hardness, conductivity, total dissolved particle and ammonia influenced respectively explained 4%, 3.6%, 1.8%, 1.7%, 1.7%, 0.9%, 0.9% and 0.9% of the variation of macroinvertebrate community structure. The land use at riparian and catchment scale respectively explained 10% and 7% of the variation of macroinvertebrate community structure. Finally, the relationships of land use at catchment and riparian scales and water quality factors, hydrological indicators, habitat, substrate types were analyzed. This study supports the idea that human pressures effects on river macroinvertebrate communities are linked at spatial scales and must be considered jointly. ©, 2015, Science Press. All right reserved. Source

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