Abstract:Puyangjiang river, which locates in Zhejiang Province, was chosen as research object to scientifically evaluate the effect of river restoration, and to study macroinvertebrates species diversity and ecological function restoration characteristics. The research focused on the water quality and the restoration status of benthos of the surveyed reaches, including 2 near-natural reaches, 2 restored reaches in urban area and 3 restored reaches in rural area, and 1years, 3 years, 4 years and 5 years later after the involved sections were restored. Generalized least squares (GLS) model was adopted to study how the Benthic animal species diversity (total species richness, EPT richness and Shannon Wiener diversity) and functional diversity indices (functional richness, functional evenness and Rao’s quadratic entropy index) is correlated with recovery years and the types of restored reach. Our results revealed the concentration of NH₃-N and TP after restoration was significantly improved (p<0.001) and the species diversity and functional diversity of benthic communities enhanced in the restored reaches and the whole surveyed stream segment with increase of restoration years. Moreover, GLS model demonstrated that the years of restoration played a more important role than the types of restoration in the effect of river restoration, and suburban reach played a significant and positive role in RaoQ (p< 0.001). Our study indicates the restoration years and types of disturbance are two important factors that affect recovery of macroinvertebrate species diversity and functional diversity in restored reaches.

Abstract:In October 2019, the surface seawater microplastics samples were collected from six stations in coastal waters of Jiangsu Province (Lianyungang, Yancheng and Nantong) during one voyage, and the particle size, abundance and component distribution of microplastics were monitored and analyzed. The results showed that microplastics pollution existed widely in surface seawater near the coast of Jiangsu Province, and the detection rate of microplastics was 100%. The size distribution of microplastics ranged from 0.02 mm to 4.80 mm, and the proportion of micron grade microplastics was the highest (83.4%). Among the six stations, the proportion of millimeter grade microplastic was highest at station 15 , 24 , 36 ,and 37, and the closer to the coast, the higher the proportion of millimeter grade microplastic was. The abundance of microplastics ranged from 0.06 to 1.18 n/m3, with an average abundance of 0.33 n/m3. The abundance of microplastics at all stations ranked as follows: station 36

Abstract:According to the data acquired from 72 statecontrolledmonitoring sites,a source apportionment tool, ISAM (Integrated Source Apportionment Method), coupled with a regional air quality modeling system, RAMSCMAQ (Regional Atmospheric Modeling System and Community Multiscale Air Quality Modeling System), was applied to simulate thespatiotemporal distribution of PM_2.5over Jiangsu in 2017,and the contribution characteristic of the sources in different zones to ρ（PM_2.5）was analyzed. Comparisons of simulated and observed PM_2.5 showed that the model can reproduce seasonal patterns reasonably well. The correlation coefficient (r) was 0.76, the standard mean deviation (NMB) was 5.2%, the root mean square error (RMSE) was 23.4 μg/m³, and FAC2 was 84.2%. In summer,influenced by southeasterly wind, the local contribution (52.34%) is greater than regional transport, while regional contribution (53.48%~56.84%) in other seasons was greater. In winter, the influence of five cities in northern Jiangsu Province is greater than that of eight cities along the Yangtze River, while that of eight cities along the Yangtze River in spring and summer is greater.

Abstract:That the mechanisms and characteristics of the influence of southward cold anticyclone on severe air pollution episode was analyzed based on severe air pollution cases in Jiangsu Province during 2013—2015. The process of the cold air was divided into easterly, central and westerly pathway. The characteristics of impact of cold air from each pathway on Jiangsu Province in different paths were analyzed as well as the meteorological conditions of heavy pollution in cold air.The effects of cold air in different paths on the daily increase of pollutant concentration were summarized. The influence mechanism of cold air on air pollution in Jiangsu Province was discussed. The results showed that in Jiangsu Province, severe air pollution happened under cold air was mostly took place when the cold air was from central pathway, and rare cases were from easterly pathway. Generally, the air pollution episodes under central and western pathway were regional and continuous; while those under eastern pathway were local and short. During severe pollution episodes, at high altitude, the cold air was mainly at north side of Jiangsu Province; at mid and low altitude, there was northwest airflow in front of ridge or weak shear; on the surface, Jiangsu was in the front of cold air. Compared to the easterly pathways, more air pollutants were transported from central or westerly pathway. The heavy pollution might be intensified under stable weather conditions with negative transportation upstream, extraordinarily strong inverse and weak wind.Overall, the severe air pollution in Jiangsu province was attributed to the combined contributions from local emission, regional transportation and unfavorable weather conditions.

Abstract:A method for determination of 20 organic phosphorus and pyrethriod pesticides in water was established by using ultra performance liquid chromatography-tandem mass spectrometry after direct injection or after extraction and concentrated. The instrument conditions and pretreatment conditions were optimized. The regression equation of 20 kinds of pesticides showed good linear relationship, the correlation coefficients were all greater than 0.999. The detection limits were in the range from 0.21 to 2.47 μg/Lfor direct injection, and the average recoveries ranged from 81.0% to 119% with the relative standard deviations less than 10%. For extraction and concentration method, the method detection limits of the target compounds were in the range from 0.0022to0.0043μg/L, and the average recoveries ranged from 71.5% to 115% with the relative standard deviations less than 15%. This method is simple and fast, and its precision and accuracy can meet the demands of determination of pyrethriod prsticide and organic phosphorus pesticide in water.

Abstract:In order to establish a rapid in-situ monitoring method for non-specific pollutants in urban rivers, the ultraviolet induced fluorescence spectrometer was used for the first time to measure the excitation-emission matrix (EEM) of 60 urban rivers in Yangzhou, forming a diverse water quality sample set. Using peak-picking method, correlation analysis and principal component analysis (PCA) to extract the pollution information of dissolved organic matter (DOM) from the EEM, combined with the multiple linear regression algorithm (MLR), the prediction models were established, including chemical oxygen demand (CODCr), permanganate index (IMn), ammonia nitrogen (NH₃-N) and total phosphorus (TP). The research results showed that the peak-picking method combined with correlation analysis could effectively inflect the characteristics and status of pollution from the EEM of the water bodies. The determination coefficients rc2 of the four prediction models were all greater than 0.82, and there was low RMSE between the prediction results and the analysis results by the national and industry standard methods, which indicated that this technology has good accuracy and precision, and it provides an effective solution for the efficient and in-situ monitoring of urban water bodies in large scale.

Abstract:A method for the determination of aniline in soil was established by purge and trap-gas chromatography-mass spectrometry. The pretreatment conditions and the chromatographic column were optimized. The method was used to determine aniline in the contaminated soil of enterprises. The calibration curves of aniline showed good linearity when the mass fraction of aniline was in the range of 20~4 000 μg/kg. The detection limit was 1.5 μg / kg and the correlation coefficient (r) was 0.999 1. The average spiked recovery ranged from 90.1% to 97.6%, and the relative standard deviations were in the range of 5.4%~7.9%. The method solved the problem of tailed peaks in the analysis of aniline, and showed advantages of high test efficiency, low detection limit, good precision and accuracy. It is suitable for the determination of aniline in soil of remediation sites of enterprises.

Abstract:Based on the routine water quality monitoring data of national and provincial surface water monitoring network of Guboshanhou River from 2016 to 2020, the water quality pollution status of Guboshanhou River was comprehensively evaluated by water quality index method (WQI). Based on the results of water quality evaluation, COD_Mn and TP, which have the greatest impact, were selected to carry out intensive monitoring of the Guboshanhou River in October 2020 to investigate and analyze the pollution sources. The results showed that the water quality of Guboshanhou River fluctuated greatly from 2016 to 2020. Rainfall in flood season has a significant effect on the water quality decline. COD_Mn, TP, COD_Cr, fluoride and BOD₅ are the main indexes affecting the water quality of Guboshanhou River. During the intensive monitoring period, COD_Mn and TP concentrations increased by 28.9% and 38.3%, respectively, and the increase rate in Suqian section was significantly higher than that in Lianyungang section. The percentage of tributary with water quality over class Ⅲ was 22.9%, the percentage of that over class Ⅴ was 6.3%. Direct discharge of domestic sewage in some towns and villages and continuous rainfall wash high concentration of pollutants from farmland into river branches, which is the main reason for the decline of water quality.

Abstract:In order to study the indication and evaluation of diatom community on water quality in the water source, this study analyzed the community structure of nine planktonic diatoms in the eastern waters of Taihu Lake，the results show that the biodiversity of the 9 sites is from moderate to abundant, indicating that the water body is in a medium to light pollution state. In addition, the species richness, biomass, and algae density of diatom communities vary due to factors such as the topography of the water area, the water exchange cycle, and other factors. The species richness in semienclosed water is poor, and the biomass and algae density are high. The probability of dominant species at different points in different water quality was analyzed, and the results showed that the water quality in the eastern waters of Taihu Lake was at a moderately low level. The ecological indicator values of dominant species also indicate that these dominant species are mostly polluted species. The results are highly consistent with the aroma concentration index and water quality index, indicating that planktonic diatoms have a good ecological indicator function. The redundant analysis of the relative abundance of diatoms and various environmental factors showed that total phosphorus (TP) had a significant effect on the composition and distribution of the community. The planktonic diatom communities in the northeast waters are mainly affected by TP and NTU, while the planktonic diatom communities in the southeastern waters are affected by TP and NTU.This study shows that the community distribution of diatoms shows regional differences, and this difference is closely related to water quality indicators.

Abstract:In order to understand the water quality status of Lianyungang coastal waters, the writer had samply monitored 19 indicators including nutrients and heavy metals of offshore area in the spring, summer, and fall in 2019.Furthermore,the writer applied Organic pollutant index method and eutrophication index method ,which were made according to the reachingstandard rate of seawater quality evaluation standard,to comprehensively evaluate the Organic pollution of sea waters and nutrient level.The results show that the annual reachingstandard rate of the survey sites is 86.4 percent in 2019, the reachingstandard area reaches 6 543 km²,which accounts for 98 percent of the sea area under jurisdiction.The quality of water was further improved than previous years.The main superscalar includes inorganic nitrogen and phosphates. The comprehensive evaluation results show that the organic pollution and eutrophication of survey seawater are in good condition.The water quality of offshore areas is inferior to that far from the sea.Furthermore, water quality shows the fluctuation change with the replacement of seasons.

Abstract:In order to study the concentration and composition characteristics of volatile organic compounds (VOCs) in ambient air in Changzhou City, 57 kinds of VOCs were being measured at 3 sites(Luoyang Primary School, Municipal Monitoring Station and Wucheng Industrial Park) for 49 days by offline densified observation from August 2019 to September 2019. The results showed that the average concentrations of VOCs were 29.8×10^-9,20.8 ×10^-9 and 25.3 ×10^-9 respectively. The concentrations of alkanes were the highest in all sites，in which ethane, propane and n-butane accounted the most, the percentages of alkanes were 59.1%, 57.2% and 51.4% respectively. OFP (ozone formation potential), OH consumption rate and SOAP (secondary organic aerosol formation potential) were applied to assess reactivity of VOCs. The calculation results showed that aromatics contributed the largest parts of the OFP,OH consumption rate and SOAP at each site, the corresponding percentages were 67.1%~68.0%, 45.4%~52.0% and 93.3%~94.7% among 3 sites respectively.Toluene, ethylbenzene and xylene were the key active components in aromatics. The concentrations of VOCs on upwind sites, Luoyang Primary School and Wucheng Industrial Park, were higher than that on urban site, Municipal Monitoring Station, the OFP and SOAP showed the same as well, indicating that the VOCs emissions from the upwind had a great impact on the urban area.

Abstract:In this paper, the development of the soil remediation market and the status of soil remediation technology in Jiangsu Province is expounded. The existing market problems from the aspects of business environment, market competitiveness, standards and regulations are also analyzed, and put forward suggestions that the market environment needs to be ameliorated, market competitiveness needs to be strengthened, standards be formulated, model be innovated and talented people be cultivated.In response to some technical problems such as the site environmental survey and risk assessment technology remain to be improved, there is lack of R&D investment in the remediation of groundwater, and research on soil monitoring and safely reuse after remediation lags behind. So, in order to make a good reference for healthy development of soil remediation industry, we suggest that site environmental survey and risk assessment technology be improved, research and develop material, equipment and technology for water and soil remediation be strengthened, long term monitoring and reuse research be enhanced.

Abstract:A questionnaire survey about acoustic environment was performed in Zhangjiagang, including 176 residents in 7 towns. The acoustic environment quality was improved in recent years according to survey results, 57% of the respondents were satisfied with acoustic environment, the public was highly concerned about the acoustic environment. It was believed by the respondents that the main source of noise pollution was from building construction, followed by industry noise, then traffic noise, the sociallife noise was considered as the least important noise source. But there was no significant difference in the number of noise pollution events actually caused by the four noise sources according to the survey. It also showed that the noise pollution incidents that residents actually encountered and the education level of residents had a significant impact on tendency of residents to propose acoustic environmental protection measures.