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Pan C.,Anhui Institute of Environmental Science | Pan C.,Nanjing University | Ding F.,Hefei University of Technology | Zheng Z.,Nanjing University
Proceedings of the 3rd International Conference on Environmental Technology and Knowledge Transfer | Year: 2010

Model simulation is the most effective way to quantitatively estimate the agricultural non-point source pollution load, and it's also the premise of planning, control and management for the agricultural non-point source pollution (ANPSP). This paper reviewed the progress of the domestic and international agricultural non-point source pollution model, described briefly the profiles and the main features of some commonly used agricultural non-point source pollution model and discussed the development trend of agricultural non-point source pollution model, which hopes to have a certain reference value for the model selection, improvement and research work.


Li R.,Hefei University of Technology | Pan C.,Anhui Institute of Environmental Science | Chen J.,Hefei University of Technology | Jiang Y.,Hefei University of Technology | Ding G.,Hefei University of Technology
Huanjing Kexue Xuebao/Acta Scientiae Circumstantiae | Year: 2013

Based on the characteristics of concomitancy of multiple uncertainties in environmental health risk system, the blind number theory was introduced to the assessment of human health risk. Blind number models were developed to calculate exposure dose and characterize the health risk of heavy metals, and a classification model for cancer risk was put forward as well. As a case study, the models established were applied for health risk assessment of Pb, Zn, Cr, As, Cu, Ni and Cd in urban topsoil and dust of Tongling City. And possible values and their corresponding credible degrees of cancer and non-cancer risks were calculated simultaneously for the measured heavy metals. The results showed that the total expected value of non-cancer risk for the seven metals reached 2.036, far exceeding the safety threshold value 1.0. Especially for As, the non-cancer risk through ingestion of dust particles approached 1.438. In general, the expected value of non-carcinogenic risk for the measured seven metals decreases in the order of As>Cr>Pb>Cu>Cd>Ni>Zn. Regarding carcinogen effects, the highest risk for As is associated with ingestion of dust particles and its overall expected value reached 5.195×10-4, far exceeding the upper limit (1.0×10-4) recommended by the United States Environmental Protection Agency (USEPA). In addition, the carcinogen risk for As through dermal contact with dust particles was also high, expected as 3.964×10-5 close to the highest acceptable risk value 5.0×10-5 proposed by the International Radiation Protection Association (ICRP).


Chen F.,Chinese Research Academy of Environmental Sciences | Chen F.,Hefei University of Technology | Wu W.,Hefei University of Technology | Lu S.,Chinese Research Academy of Environmental Sciences | And 4 more authors.
Chinese Journal of Environmental Engineering | Year: 2015

To assess the effect of repaired engineering on soil and sediment in the Gonghu Bay Returning Fishery to Lake Area (GBRFLA),track survey on the Engineering of Gonghu Bay Returning Fishery to Lake was made from November 2012 to May 2014. Soil physical and chemical properties of GBRFLA were analyzed and compared. The results showed that the chemical properties of the GBRFLA's soil and sediment, i.e. organic matter(OM), TN and TP increased 241.59%, 98.61%, 162.86% than early period of GBRFLA respectively. Among them, the average contents of available nitrogen and phosphorus were 102.31 mg/kg and 15.10 mg/kg. They all meet III standard of the classification standard of soil nutrient grade. Compared with the early period of GBRFLA, the main physical properties were repaired significantly. Soil density decreased by 17.84%, pH was stable in 5.8~6.5, the buffer capacity of soil increased obviously. The soil aggregate stability from best to worst are as following, the southern area (artificial planted area)> the western area (natural recovered area)> the northern area (no artificial planted area with the poorest basal condition). After 17 months, the overall quality of basement tended to be well. Each index gradually tended to be stabilized. The soil environment already has good ecological functions. ©, 2015, Science Press. All right reserved.


Wu J.,Hefei University of Technology | Wu J.,Chinese Research Academy of Environmental Sciences | Lu S.,Chinese Research Academy of Environmental Sciences | Li X.,Hefei University of Technology | And 4 more authors.
Chinese Journal of Environmental Engineering | Year: 2015

Because human activity is the main source of heavy metal pollution, sediments are carried in living area, industrial area and agricultural areas from perspective of landscape unit, the content and characteristics of seven heavy metals (Pb, Cd, Cr, As, Hg, Cu, Zn) of three typical areas sediments in Tiaoxi River. Ecological risk index was utilized. The results showed that the sediments of typical industrial were polluted mainly by Cu, Hg and As compared with the environmental quality standard for soils, and for the typical living area and agricultural aera, there are mainly Hg pollution. The results of correlation of typical industrial areas analysis show correlation among Zn, As and Pb, which suggest their origin is the same. As to typical agriculture area, correlation exists between Cu, As and Cd, which suggest their origin is the same. As to typical living area correlation exists Zn, As and Cd, which suggest their origin is the same. Based on the potential ecological risk assessment results, sediments from the three typical areas are clean or low-risk status, good sediment quality. © 2015, Science Press. All right reserved.


Li R.-Z.,Hefei University of Technology | Pan C.-R.,Anhui Institute of Environmental Science | Chen J.,Hefei University of Technology | Jiang Y.-M.,Hefei University of Technology | Ding G.-Z.,Hefei University of Technology
Zhongguo Huanjing Kexue/China Environmental Science | Year: 2012

This research focused on the potential health risk assessment of heavy metals (including As) pollution in urban topsoil and dust from Tongling, a typical nonferrous metal mining city, China. Samples were collected from sixty four sampling sites covering six land-use types, that is, industrial, residential, commercial, educational and traffic areas, as well as city squares. The heavy metal (Pb, Cu, Cr, Zn, Ni, As and Cd) contents of all samples were analyzed and health risk assessment were conducted for children and adult respectively, using the risk models recommended by the United States Environmental Protection Agency (US EPA). The levels of heavy metal elements in the urban topsoil and dust of Tongling are much higher than the natural soil background level in the regions, suggesting that the urban topsoil and dust have been heavily polluted by those metals. The exposure to Cr, Ni, As and Cd results in a cancer risk value of 4.30×10-7, 7.18×10-9, 4.26×10-4 and 7.58×10-8, respectively, and the mean cancer risk for such six land-use types vary in the range of 1.55×10-4-9.14×10-4, significantly higher than the acceptable or tolerable range of threshold values 10-6~10-4 recommended by USEPA, and the 5.0×10-5 probability level deemed unacceptable by the International Commission on Radiation Protection (ICRP). The exposure to topsoil and dust yields an aggregate Hazard Index of 5.20 and 16.58 for children, respectively, while the exposure to dust results in an aggregate Hazard Index of 2.80 for adult, far exceeding the threshold value of 1.0. As a predominant single contributor both to carcinogenic and non-carcinogenic risks, arsenic is the trace element of most concern. In addition, the highest risk is associated with ingestion of soil particles.

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