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He F.,Anhui Agricultural University | Wu N.,Anhui Academy of Environmental Science | Fang X.-L.,Anhui Academy of Environmental Science | Gao J.-X.,Nanjing Institute of Environmental Sciences | And 2 more authors.
Chinese Journal of Applied Ecology | Year: 2015

A model of phosphorus purification in a watershed was established based on the export coefficient and purification index of phosphorus in different types of land cover. The model was employed to simulate the economic value of the ecosystem service with the expected water quality standard and marginal cost of pollutant purification of the upper reaches of Xin'an River of Anhui, China. The results revealed that from 2000 to 2010, some farmland outside the Tunxi, Jixi, Shexian, Yixian and Xiuning was converted to built-up land. The total amount of phosphorus exported to the upper Xin'an River decreased a little, and the main source of phosphorus pollution was farmland and built-up land. More than half of the exported phosphorus was efficiently purified by different types of land cover via flow accumulation. The pattern of purification and export of highly concentrated phosphorus showed the same trend which occurred in the northern part of the watershed including the Yangzhi River, Fengle River and Hengjiang River. Forestland and grassland did not efficiently purify phosphorus in the watershed owing to the irrational distribution of existing land cover. The total service value was 3.80 and 3.31 million Yuan in 2000 and 2010, respectively. ©, 2015, Editorial Board of Chinese Journal of Applied Ecology. All right reserved.

Zhang L.,Anhui Academy of Environmental Science | Chen Y.,Anhui Academy of Environmental Science | Wu J.,Anhui Academy of Environmental Science | Tie J.,North China University of Water Conservancy and Electric Power | And 2 more authors.
5th International Conference on Bioinformatics and Biomedical Engineering, iCBBE 2011 | Year: 2011

Two subsurface-flow wetlands were constructed to carry out the research. wetland 1 without corncob was used as control, wetland 2 with corncob used as natural solid carbon source(NSCS)at the inlet end was used to investigate effects of corncob on advanced treatment of secondary effluent from sewage treatment plant.. The results indicated that the leakage of carbon released from the corncob caused the lower COD removal in wetland 2, however, the nutrients released from the corncob led to higher microbial reproduction and activity, and thus resulted in higher inorganic and total phosphorus removals by microbial assimilation. The improvement of the carbon to nitrogen ratio (C/N) by the carbon released from the corncob enhanced microbial denitrification to result in better removals of the nitrate nitrogen and total nitrogen. Wetland 2 also had a better resistance to shock load of nitrate nitrogen. Corncob is favorable for the improvement of pollutants removal from secondary effluent quality from the sewage treatment plant. © 2011 IEEE.

Ge J.,Anhui Academy of Environmental Science | Wu N.,Anhui Academy of Environmental Science | Gao J.,Nanjing Institute of Environmental Sciences | Wang X.,Anhui Academy of Environmental Science | And 4 more authors.
Shengtai Xuebao/ Acta Ecologica Sinica | Year: 2012

10 different future land cover pattern scenarios with slope criteria were built based on local ecological policies in the watershed of Ertan reservoir. The responses of 3 different ecosystem regulating services which were avoiding reservoir sedimentation, avoiding nonpoint source pollution of aquatic environment and water supply and energy produced and its economic value to future land cover pattern were studied. The service benefit of various pattern scenarios was weighed by integrating the change of income of agriculture, forestry and animal husbandry. The scenario which let the well-being of related groups to maximal increase was selected. The results showed: 1) The existing land cover pattern was incongruous to exerting the ability of avoiding reservoir sedimentation. Theland cover pattern changed according to the national policies for returning farmland to forests was in favor of avoiding riverway and reservoir sedimentation. The value of sediment retention's ranks was contrary to sediment delivery. The value of sediment retention followed the rules of "the area percent of forest and grassland increasing as the value of sediment retention". Along with the increase of total sediment delivery, the high sediment delivery cells spread out from the region around the reservoir to the middle and upper reaches of Yalong river. 2) The national policies for returning farmland to forests guided the land cover changes were based on the slope ranks. It was unsuitable to avoiding phosphorus nonpoint source pollution of aquatic environment in watershed. The ranks of phosphorus delivery were completely in line with the value of filtering phosphorus pollution except scenario 10 which was all covered by unused land. The law was farmland > grassland > forest. Along with the increase of total phosphorus pollution delivery, the high phosphorus pollution delivery cells spread out from the source region and big river bend of Yalong river basin to the whole network of rivers of watershed except scenario 10. 3) Along with the increase of the forest area percent, the total net present value (NPV) of energy produced in watershed decreased. Along with the increase of total net present value (NPV) of energy produced, the high NPV cells spreaded out from the eastern of Mianning and Xide county to the southeast of whole watershed and the lower reaches of Yalong river. 4) From the viewpoint of lightening the negative effect to environment and letting the well-being of related groups be maximal increase, The quantity of aggregative indicator on scenario 5 that 6° slope was a threshold in determining farmland and forest cover and scenario 3 that 6° and 15° slope were threshold in determining farmland, grassland and forest cover increased at the highest extent except the extreme scenarios.

Wu N.,Anhui Academy of Environmental Science | Zhou X.-T.,Anhui Academy of Environmental Science | Wang X.-H.,Anhui Academy of Environmental Science | Gao J.-X.,Nanjing Institute of Environmental Sciences | And 3 more authors.
Chinese Journal of Ecology | Year: 2014

Xijian Lake (formerly Chengxi Reservoir) is the unique surface water source of Chuzhou City, Anhui. Its water quality deterioration is mainly caused by the nonpoint source pollution. Based on the pattern of land use/ land cover (LULC), a model was established by GIS platform to simulate the quantity of nonpoint source pollution exported to the aquatic environment and retained by the different LULC on each cell on the platform of GIS. This study chose phosphorus as a pollutant surrogate and relevant data of the year 2010 were used in the model. The quantity of phosphorus exported to the lake and phosphorus retained were simulated under five different LULC scenarios. The results showed that in 2010, the total phosphorus exported to the lake was 2461.20 kg. Critical source areas of phosphorus mainly included the city's Institute of Agricultural Science, Chengjiao resident area, the Institute of Aquaculture in the northwestern of watershed. Most of the exported phosphorus was effectively retained by the different LULC in the process of transportation, and the total phosphorus retained by LULC was 5422.36 kg, accounting for 68.8% of the total phosphorus loads. The simulated results for the amounts of phosphorus exported to the lake under five different LULC scenarios were in the order of cropland > built-up > grassland > forestland. The scenarios 4 and 5 that included vegetation buffer zones with different widths planted along the shore and on the intersection of runoff would largely improve the efficiency of phosphorus retention. However, the program of returning croplands to forests, which guided the land cover changes only based on the slope ranks, would be less efficient to prevent phosphorus from the watershed entering the aquatic environment.

Dou C.,Zhejiang University of Science and Technology | Dou C.,Anhui Academy of Environmental science | Zhang J.,Nantong University
Journal of Hazardous Materials | Year: 2011

Lead neurotoxicity has caused wide public concern in recent decades, yet little is known about its effects on cellular and molecular mechanisms during the sensitive early life stages of animals. This study examines neurological deficits caused by lead acetate (Pb) during early embryonic stages in the zebrafish (Danio rerio) and further explores its potential molecular mechanism. Zebrafish embryos showed varying levels of toxicity, which was proportional to the concentration of Pb to which the embryos were exposed. Following Pb exposure (0.2. mM), embryos showed obvious neurotoxic symptoms with " sluggish" action, slow swimming movements and slow escape action. Whole mount in situ hybridization showed that gfap and huC gene expression patterns decreased significantly throughout the brains of the Pb-treated embryos, particularly in the diencephalon region. RT-PCR further proved the downregultion of the two genes. However, ngn1 and crestin gene expression patterns were similar in both the Pb-treated embryos and the control embryos. The TUNEL assay demonstrated that the reduction of nerve cells was due to increased apoptosis of neuron and glia cells. In conclusion, these findings identify that Pb-induced neurotoxicity can be caused by impaired neurogenesis, resulting in markedly increased apoptosis of special types of neural cells, neuron and glia cells. © 2011 Elsevier B.V.

Qi C.,Hefei University of Technology | Qi C.,City University of Hong Kong | Qi C.,Anhui Academy of Environmental science | Qi C.,University of Hong Kong | And 5 more authors.
Journal of the Air and Waste Management Association | Year: 2011

Thirty-three soil samples were collected from the Luling, Liuer, and Zhangji coal mines in the Huaibei and Huainan areas of Anhui Province, China. The samples were analyzed for antimony (Sb) by inductively coupled plasmaoptical emission spectrometry (ICP-OES) method. The average Sb content in the 33 samples was 4 mg kg-1, which is lower than in coals from this region (6.2 mg kg-1). More than 75% of the soils sampled showed a significant degree of Sb pollution (enrichment factors [EFs] 5-20). The soils collected near the gob pile and coal preparation plant were higher in Sb content than those collected from residential areas near the mines. The gob pile and tailings from the preparation plant were high in mineral matter content and high in Sb. They are the sources of Sb pollution in surface soils in the vicinity of coal mines. The spatial dispersion of Sb in surface soil in the mine region shows that Sb pollution could reach out as far as 350 m into the local environment conditions. Crops in rice paddies may adsorb some Sb and reduce the Sb content in soils from paddyfields. Vertical distribution of Sb in two soil profiles indicates that Sb is normally relatively immobile in soils. © 2011 Air & Waste Management Association.

PubMed | Wenzhou Medical College, Anhui Academy of Environmental science, Nantong University and Nanjing University
Type: Journal Article | Journal: Neural regeneration research | Year: 2014

Lysine-specific demethylase 1 (Lsd1) is associated with transcriptional coregulation via the modulation of histone methylation. The expression pattern and function of zebrafish Lsd1 has not, however, been studied. Here, we describe the pattern of zebrafish Lsd1 expression during different development stages. In the zebrafish embryo, lsd1 mRNA was present during the early cleavage stage, indicating that maternally derived Lsd1 protein is involved in embryonic patterning. During embryogenesis from 0 to 48 hours post-fertilization (hpf), the expression of lsd1 mRNA in the embryo was ubiquitous before 12 hpf and then became restricted to the anterior of the embryo (particularly in the brain) from 24 hpf to 72 hpf. Inhibition of Lsd1 activity (by exposure to tranylcypromine) or knockdown of lsd1 expression (by morpholino antisense oligonucleotide injection) led to the loss of cells in the brain and to a dramatic downregulation of neural genes, including gad65, gad75, and reelin, but not hey1. These findings indicate an important role of Lsd1 during nervous system development in zebrafish.

Tang X.,Zhejiang University | Shen C.,Zhejiang University | Chen L.,Zhejiang University | Xiao X.,Zhejiang University | And 4 more authors.
Journal of Soils and Sediments | Year: 2010

Purpose: The emerging recycling of electronic and electric waste (e-waste) is causing critical levels of soil pollution in those relatively poor towns surrounding the central cities, which have been involved in recycling activities for quite some time. Agricultural soil is of great importance due to its direct impact on food and human health. The objective of this study was to provide a systematic investigation of the contamination in agricultural soil for a range of inorganic compounds (Cr, Cd, Pb, Zn, Cu, and Ni) and organic compounds (PAHs and PCBs) in town A, an emerging e-waste recycling town in China. Materials and methods: A total of 20 agricultural soil samples were collected from three sampling locations throughout town A. Levels of inorganic compounds (Cr, Cd, Pb, Zn, Cu, and Ni) and organic compounds (PAHs and PCBs) were determined by AAS, GC/MS, and GC/electron capture detector, respectively. Data was processed with SPSS 13 and Arcview 3. 3 GIS software. Results and discussion: The findings demonstrate that agricultural soil was contaminated to various extents by inorganic and/or organic pollutants. Comparison among the three sampling areas indicated that the soil was highly contaminated in the agricultural area near e-waste recycling workshops. Moreover, the contaminants (Cu, Pb, PAHs, and PCBs) may be connected through a common source as found in the Pearson correlations and cluster analysis. Conclusions: There exists a heightened sense of awareness concerning the hazardous implications of current emerging e-waste recycling issues in the agricultural soil of those areas close to the central city in Taizhou. © 2010 Springer-Verlag.

Chen Y.,Anhui University of Science and Technology | Chen Y.,CAS Institute of Earth Environment | Liu G.,Anhui University of Science and Technology | Liu G.,CAS Institute of Earth Environment | And 5 more authors.
Environmental Earth Sciences | Year: 2015

Selenium, a toxic element, is highly enriched in the coals of the Huaibei coal deposit, China. For this study, Se content along with rock-forming and trace element abundances was determined in 123 coal and 19 rock samples collected from the main coal seams in seven coal mines in the Huaibei coalfield. This was done to investigate the Se geochemistry in the Huaibei coals. Compared with average Chinese coal and other coals around the world, the Huaibei coals are enriched in Se by a factor of five. Differences in the boron content in the sequence of Huaibei coal seams show that the depositional environment of the formations hosting the coal seams evolved from a delta front to a prodelta setting and then to a delta plain environment. Selenium is distributed unevenly both horizontally and vertically in the Huaibei coal deposit. Pearson correlation coefficients between Se with several elements (Ca, Fe, and S) indicate that iron-bearing clay minerals and carbonates are the dominant carriers of Se in coals of the Lower Shihezi Formation. Selenium in coals from No. 3 and No. 10 coal seams are mainly associated with sulfide minerals. The well-developed faults in Huaibei coalfield may have contributed to the enrichment of Se in Huaibei coals. © 2015, Springer-Verlag Berlin Heidelberg.

Wang R.,Hefei University of Technology | Wang R.,CAS Institute of Earth Environment | Yousaf B.,Hefei University of Technology | Sun R.,Hefei University of Technology | And 4 more authors.
Journal of Hazardous Materials | Year: 2016

The objective of this study was to characterize parent polycyclic aromatic hydrocarbons (pPAHs) and their nitrated derivatives (NPAHs) in coarse (PM2.5–10), intermediate (PM1–2.5) and fine (PM1) particulate matters emitted from coal-fired power plants (CFPPs) in Huainan, China. The diagnostic ratios and the stable carbon isotopic approaches to characterize individual PAHs were applied in order to develop robust tools for tracing the origins of PAHs in different size-segregated particular matters (PMs) emitted CFPP coal combustion. The concentrations of PAH compounds in flue gas emissions varied greatly, depending on boiler types, operation and air pollution control device (APCD) conditions. Both pPAHs and NPAHs were strongly enriched in PM1–2.5 and PM1. In contrary to low molecular weight (LMW) PAHs, high molecular weight (HMW) PAHs were more enriched in finer PMs. The PAH diagnostic ratios in size-segregated PMs are small at most cases, highlighting their potential application in tracing CFPP emitted PAHs attached to different sizes of PMs. Yet, substantial uncertainty still exists to directly apply PAH diagnostic ratios as emission tracers. Although the stable carbon isotopic composition of PAH molecular was useful in differentiating coal combustion emissions from other sources such as biomass combustion and vehicular exhausts, it was not feasible to differentiate isotopic fractionation processes such as low-temperature carbonization, high-temperature carbonization, gasification and combustion. © 2016 Elsevier B.V.

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