Abstract:Satellite remote sensing is one of the important methods to understand the spatiotemporal distribution of atmospheric carbon dioxide (CO₂). However， due to the restricts of detection technology， the satellite retrieved columnaveraged mole fraction of carbon dioxide (XCO₂) contains a large amount of missing data， which is insufficient to reflect the full spatiotemporal distribution of carbon dioxide concentrations. In this study， based on satellite (OCO-2， TROPOMI) and model (Carbon Tracker， ERA5Reanalysis) data， we used a time series fitting model and a random forest model to reconstruct the XCO₂ with a high spatial resolution (0.05°×0.05°) for China during the period from 2019 to 2022. Compared with OCO-2 and Carbon Tracker XCO₂， the reconstructed XCO₂ was better consistent with OCO-2 observations， with a root mean square error (RMSE) of 1.05×10^-6 and a high correlation coefficient(R²) of 0.96. Based on the reconstructed XCO₂， it was found that XCO₂ shows significant seasonal fluctuations， with higher values in winter and spring and lower values in summer and autumn. From 2019 to 2022， XCO₂ in China showed an increasing trend with a growth rate of （2.41±0.01）×10^-6/a， but the growth rate has slowed down in recent years. In terms of spatial distribution， XCO₂ in eastern， northern， and central China is significantly higher than other regions， so as the growth rate. Among above regions， Hangzhou， Tianjin， and Chengdu have the fastest XCO₂ growth rates. The research findings of this study provide data basis for carbon monitoring research， carbon emission inventory verification， carbon emission management， greenhouse gas reduction， and other related studies.

Abstract:In this paper， the life cycle assessment method (LCA) was used to analyze the carbon footprint of the whole cycle of Porphyra culture and processing industry. The types and extent of carbon emission sources in each link were identified. The results show that the total carbon emission in 100 mu of Porphyra cultivation and processing was 1.25×10⁵~2.47×10⁵ kg CO_{23 kg of CO2}

Abstract:In order to compare the differences of characteristics and sources of carbon components aerosols in PM_2.5 in Nanjing between urban and suburban areas， continuous monitoring of organic carbon (OC) and elemental carbon (EC) was conducted in the urban and suburban areas of Nanjing during year 2022 using carbon component online monitoring instruments. The results show that： (1) Concentrations of (OC) and (EC) in 2022 are (5.24±2.39) and (1.27±0.62) μg/m³ in urban areas， and (5.67±2.45) and (1.32±0.70) μg/m³ in suburban areas. Concentrations of (OC) and (EC) in 2022 are both significantly lower than those in 2014—2018. Concentrations are high in winter and low in summer in both urban and suburban areas. From the perspective of daily variation characteristics， both OC and EC at the two stations are low at daytime and high at nighttime and exhibit obvious peakvalley values. (2) The correlation between OC and EC is high in winter， significantly higher than that in spring and summer. According to the relationship between carbon components and gaseous pollutants， as well as the ρ（OC）/ρ（EC） ratio analysis， there is secondary generation in both urban and suburban areas. Vehicles and coal are the main sources of pollutions in urban and suburban areas. The impact of vehicle sources on urban station is greater than that of suburban station， while the impact of coal sources on station is greater than that of urban station. (3) The direct emissions of pollution sources significantly affect the concentration level of OC in Nanjing， with the concentration of SOC in suburban areas being higher than that in urban areas. Urban areas should focus on motor vehicle emissions， while suburban areas need to collaborate with surrounding areas to control pollution from coalfired and biomass combustion.

Abstract:In the study， the Sentinel-2 MSI satellite data for year 2021 and 2022 were used to retrieve five vegetation biophysical indicators: FAPAR (Fraction of Absorbed Photosynthetically Active Radiation)， FVC (Fraction of Vegetation Cover)， LAI (Leaf Area Index)， CCC (Canopy Chlorophyll Content)， and CWC (Canopy Water Content) in the ecological security buffer zone of Xiaoxia Bay in Suzhou. The five vegetation biophysical indicators were retrieved from Biophysical Processor module provided by SNAP based on the combination of vegetation canopy radiative transfer model and machine learning. The results showed that after the completion and operation of the ecological safety buffer zone since 2021， the vegetation canopy structure， cover， biomass， and ecological environment have been improved. The vegetation biophysical indicators can reflect the ecological conservation effectiveness of the ecological safety buffer zone from a certain perspective. The methodology of this study can quickly and efficiently invert vegetation biophysical parameters on a large scale and provide useful reference for dynamic monitoring and assessment of ecological function of ecological safety buffer zone using remote sensing.

Abstract:With the rapid development of the urban catering industry， catering sources have gradually become one of the main sources of atmospheric volatile organic compounds (VOCs). To further understand the emission characteristics of catering fumes and scientifically develop the emission reduction countermeasures of catering sources in Guangzhou， a cooking platform was built in the laboratory to simulate the cooking process， and the effects of oil heating temperature， edible oil type and cuisine type on the VOCs composition of cooking oil fume emission were discussed. The stainless steel sampling tank or air bag was used to collect the catering fume emission from four restaurants in typical business district of Guangzhou， including Sichuan restaurant， Hunan restaurant， Guangdong restaurant and Vietnam restaurant. The composition characteristics of VOCs in catering fume emission from four restaurants were studied by gas chromatographymass spectrometry. The results showed that there were significant differences in the concentration and composition characteristics of VOCs produced by different edible oils at different oil temperatures and in different cuisines. The emission concentration of VOCs from cooking fumes is positively correlated with temperature. The VOCs of cooking fumes produced by Southeast Asian and Sichuan cuisines are mainly carbonyl compounds， while deepfried cooking methods (fries) are dominated by carbonyl compounds and alkanes. Among the carbonyl compounds of VOCs in fries， Southeast Asian and Sichuan cooking oil fumes， acetaldehyde accounted for a prominent proportion. Acetaldehyde accounted for the highest proportion of lard fume(60.4%)，followed by peanut oil(53%). Compared with ambient air samples， aldehydes (butyraldehyde， methyl acrolein， benzaldehyde， glutaraldehyde， and hexanal) were detected in catering fumes VOCs. At the same time， the experimental simulation and field monitoring results show that the electrostatic catering fume purifier could effectively remove acetaldehyde. The minimum concentration of benzene series detected in catering fume was higher than that in the surrounding environmental samples. The carcinogenic risk of benzene in the catering fume of only Hunan restaurants among 4 different cuisines is greater than 10^-4, indicating a significant risk of cancer. Therefore， it is suggested that the catering industry should be standardized and scientifically managed according to the key components and pollution types of catering fumes VOCs.

Abstract:To investigate the content of radioactive substance uranium（U） in surface water in Sichuan province， and to evaluate the health risk of residents taking U in surface water, a total of 23 monitoring sections were set up in the main surface water systems of Sichuan Province. The U radioactivity levels were detected during 2016—2021， and then the health risks of residents were assessed according to the health risk assessment model. Results showed that the radioactivity level of U in surface water in Sichuan province was 0.16~3.6 μg/L， which was all qualified according to “standards for drinking water quality”（GB 5749—2022）. There was no statistical significance in the radioactivity level of U in different years and different surface waters（P＞0.05）. There was statistical significance in radioactivity levels of U in different water periods（P＜0.05）. The total annual effective dose caused by U intake through drinking water and water immersion was lower than 0.1 mSv in all age groups. The total carcinogenic risk for residents of all ages was 4.18×10^-9 ～2.24×10^-8 ， all lower than the strictest control limits issued by World Health Organization（WHO） and International Commission on Radiological Protection（ICRP）. U in the main surface water bodies in Sichuan province is safe for all age groups.

Abstract:An inductively coupled plasma coupled with triple quadrupole mass spectrometric (ICP-MS/MS) method was established for the determination of trace total phosphorus (TP)， dissolved phosphorus (DP) and particulate phosphorus(PP) in surface water samples. The instrument parameters and oxygen flow rate for the determination of phosphorus in water by ICP-MS/MS were determined. The detection limit， precision and accuracy of the method for the determination of phosphorus in surface water were studied. The effects of turbidity， chromaticity and the presence of arsenic， chromium and sulfur on the determination of phosphorus by ICP-MS/MS were explored. The results show that trace phosphorus in surface water can be detected by ICP-MS/MS with high purity oxygen， and the detection limit of this method is 0.24 μg/L， the method has good linearity in the range of 1.00~1 000 μg/L， the correlation coefficient is 0.999 5， and the recoveries are between 92% to 103%. This method has fast detection speed and strong resistance to the interference of turbidity， chromaticity， arsenic， chromium and sulfur. The monitoring data of Xinanjiang Reservoir in four quarters shows that the average concentration of TP in the whole lake of Xin'anjiang Reservoir is 10~20 μg/L， the ratio of DP to TP is 42.4%~50.9%. ICPMS/MS method therefore can satisfy the determination and speciation analysis of trace phosphorus in surface water.

Abstract:In this study，an analytical method of ultra performance liquid chromatography tandem mass spectrometry (UPLC-MS/MS) was established， which can simultaneously determine the residues of 18 cephalosporins in surface water. The automatic solid phase extraction technology is used for pretreatment. Surface water samples are enriched by HLB solid phase extraction column and eluted with 1.0% (V/V) formic acid methanol solution. BEH Shield RP18 (1.7μm，2.1mm×100mm) chromatographic column is preferred to be used for separation. It can be ionized in the positive mode of electrospray (ESI+)， be detected in multiple reaction mode (MRM) and measured by external standard method. The results showed that the linear relationship of 18 cephalosporin antibiotics is good in the concentration range of 5.0~100 μg/L， the correlation coefficients (r) are greater than 0.999， the detection limit of the method is in the range of 0.5~1.8 ng/L， and the quantitative limit is in the range of 2.0~7.2 ng/L. Standard addition recovery experiments on surface water samples showed that the recoveries of cephalosporins are 64.3%~92.8% with the relative standard deviations in the range of 0.5%~14.5%. With high level of automation and stable and reliable results， the current method is suitable for the determination of cephalosporins in surface water.

Abstract:Heavy metals are of widespread concern due to their high toxicity， carcinogenicity， and potential for bioaccumulation， which contribute to environmental issues. To precisely monitor heavy metal pollution in the environment， this study leverages the advantages of electrochemical analysis and ion imprinting technology to develop a highly sensitive electrochemical sensor for lead ions. Utilizing lead ion as template molecule and 3-(γ-aminopropyl)trimethoxysilane as the functional monomer， an ion-imprinted polymer was synthesized on a mesoporous silica substrate through a co-condensation method and integrated as the key recognition element of the electrochemical sensor. By meticulously tuning the composition of the carbon paste electrode， a series of ionimprinted electrochemical sensors with exceptional selectivity were prepared and their electrochemical behavior were thoroughly evaluated. The test results demonstrate that the fabricated sensors offer a linear detection range for lead ion from 10^-9 to 10^-6mol/L， with a detection limit reaching 1.3×10^-11mol/L (signal to noise ratio=3). In the detection of real samples such as river water and rice， the sensors exhibited high sensitivity (relative standard deviation of 2.5%～7.4%) and high accuracy (recovery rates of 98.8%～102.9%)， indicating their significant potential for application in environmental monitoring and food safety detection.

Abstract:A method was established for the determination of trace anisole residues in water by head space solid phase microextractiongas chromatographymass spectrometry. The factors affecting the detection results， such as the types of fibers and extraction time， were optimized. Through the optimization of conditions， the linearity of the established method was excellent in the range of 1～1 000 μg/L， the linear correlation coefficient was greater than 0.999. When the spiked concentrations were 10，60 and 300 μg/L，the recoveries were from 85% to 120%， and the relative standard deviations (RSD) were from 3.95% to 6.72%. In the full scanning mode， the detection limit of anisole was 0.3 μg/L. The experimental results show that the method is fast and simple， and the sensitivity， precision and accuracy can meet the requirements for the determination of anisole residues in water.

Abstract:Traditional water quality detection methods are timeconsuming and laborious， hyperspectralbased water quality monitoring enables rapid， intuitive， and insitu monitoring of water quality. In this paper， taking the Sanwan section of the ancient canal in Yangzhou as the research area， based on the combination of UAV hyperspectral and water quality navigation monitoring vessel， the waterground collaborative mode and partial least squares algorithm were used to quantitatively invert the water quality parameters such as TP， NH₃-N， TN， and I_Mn. The results show that the R² of the partial least squares inversion model is between 91%～97%. The order of fitting effect was NH₃-N>I_Mn>TN>TP. The absolute value of the inversion error of each index is between 0.2%～4%. The current method has a good inversion effect and can quickly and accurately obtain the distribution of urban river water quality， which is of great significance to urban water environment monitoring.

Abstract:For the purpose of conducting a comprehensive scientific assessment of urban traffic noise impact and serving traffic noise pollution control more accurately， this project selects representative traffic arteries in Nanjing City and conducts a research on the noise pollution level of different road sections and their spatial variation patterns over time. The study shows that noise sensitive buildings on both sides of ground express sections， elevated sections， and connecting sections are greatly affected by road traffic noise， and the noise levels exceed the standard at night. To meet the daytime standard limit requirements for Class 2 acoustic environment functional areas in adjacent areas， it is necessary to be about 45 m away from the ground expressway slow lane and about 92 m away from the elevated section slow lane. To meet the night time standard limit requirements， it is necessary to be about 175 m away from the ground expressway slow lane and about 172 m away from the elevated section slow lane. The noise impact on sensitive buildings increases with the height of the building， and the noise impact is also related to the density of buildings on both sides of the road and the speed of road vehicles. It is suggested that strict planning control of roads and noisesensitive buildings should be implemented， and measures such as blocking sound transmission paths and strengthening the protection of soundsensitive buildings should be taken to control noise impacts.

Abstract:In order to explore the ecological improvement effect of submerged macrophytes on eutrophic lakes， the water quality with and without submerged macrophytes， phosphorus form in sediment and phytoplankton community of Xuzhou Jiuli Lake were monitored from September 2021 to August 2022. The results showed that the submerged macrophytes in Jiuli Lake can increase the transparency (SD) and dissolved oxygen (DO)， reduce the total nitrogen (TN) to a certain extent， and improve the total phosphorus (TP)， ammonia nitrogen (NH₃-N) and turbidity (TUB)， which can effectively reduce the eutrophication level of Jiuli Lake. The contribution value of inorganic phosphorus (IP) to TP content in Jiuli Lake sediments was the largest， accounting for 64.2%~93.2%. Hydrochloric acid extractable phosphorus (HCl-P) in IP was dominant. The contents of TP and organophosphorus (OP) in sediments with submerged macrophytes were slightly higher than those without submerged macrophytes， indicating that submerged macrophytes had a certain promoting effect on phosphorus deposition in overlying water. A total of 93 species of phytoplankton in 63 genera and 7 phyla were detected in Jiuli Lake， with a density of 2.94×10⁶~7.0×10⁷ cell/L. Pseudanahaena sp.was the dominant species except in January to April when the water temperature was low. At low temperature， the overall density of phytoplankton decreased significantly， but the proportion of chlorophyta and diatom increased significantly. Submerged macrophytes have a good inhibitory effect on phytoplankton growth. ShannonWiener index indicated that submerged macrophytes decreased phytoplankton diversity.

Abstract:Xinfengjiang Reservoir is a typical largescale oligotrophic subtropical reservoir in southern China. The investigation on the seasonal and vertical dynamics of water temperature， dissolved oxygen (DO)， pH value， total phosphorus (TP)， total nitrogen (TN)， permanganate index (I_Mn) and chlorophyll a (Chl.a) was conducted from March 2020 to February 2021 in order to find out the seasonal stratification characteristics of Xinfengjiang Reservoir. Results showed that the reservoir had a significant seasonal thermal stratification in summer and autumn， and the thermal stratification period was during May to the end of October， and the mixed period were during January to April and during November to December. Thermal stratification had influences on vertical distribution of DO， pH value， TN，I_Mn and Chl.a. Strong stratification of DO and seasonal hypoxia didn't appear，the DO value of surface water was higher than class I level (7.5 mg/L) set by “Environmental quality standards for surface water”(GB 3838—2002) ， but the DO value of thermocline layer descended from Class I to Class Ⅱ—Ⅲ. It indicates that it may face potential ecological risks， which is not conducive to the stability of the aquatic ecological environment system.

Abstract:Monitoring and analysis of aquaculture water is an important basis for assessing the effect of aquaculture pollution sources on environmental quality of surface water. The water quality of aquaculture ponds and surface water sections in Xinghua， a typical area of Lixia River， was analyzed by techniques and analysis methods including manual monitoring， correlation analysis， three dimensional fluorescence and risk quotients method. The results revealed that the water quality of aquaculture water was generally worse than that of surface water sections. The water quality of aquaculture ponds and surface water sections was researched. 89.7% of the discharged aquaculture water met the requirements set by relative standard， pH value was the main influence factor. Y1 and Y2 ponds showed negative impact on permanganate index of S1 section. Agricultural sources represented by aquaculture water are the main pollution sources affecting the water quality of S1 section. The detection rate of Lincosamides in surface water and aquaculture water both reached 100%，tetracycline and cephalosporin antibiotics were consumed more in the aquaculture activities in this area. Risk quotients evaluation results showed superior threat risk of sulfamethoxazole of aquaculture water in Y2 pond.

Abstract:Due to the multiple sources of pollution， complex causes， and wide impact range， social noise poses a significant threat to public environmental health. As a result， its legal subjects are complex， involving the government departments， and covering the wide range of affected people， making it one of the concerned types in society. Neighborhood noise is an important component of social noise.This paper reviews the legislative status of neighborhood noise in France， Germany and the United States. It introduces the legal regulations and local legislative practice of neighborhood noise in China. It systematically analyzes the main types and characteristics of neighborhood noise and the current situation of pollution prevention in Jiangsu Province. Targeted legislative suggestions for neighborhood noise pollution prevention and control are proposed， providing reference for noise pollution prevention and control legislation in Jiangsu Province.

Abstract:Compared with water and air pollution， soil pollution is characterized by concealment， hysteresis and accumulation， and the restoration of contaminated soil are costly， long cycle and difficult， so it is necessary to strengthen source prevention and control to prevent problems before they occur. This paper briefly describes the management requirements of key soil pollution supervision units in China， sorts out the management points of key soil pollution supervision units from the four links of environmental access period， construction period， operation period and decommissioning period， analyzes the management status and existing problems of key soil pollution supervision units in Jiangsu Province， and puts forward countermeasures and suggestions from the aspects of strengthening publicity and training， implementing categorical and hierarchical management， exploring and carrying out technical models of management and control while production， and improving the supervision capacity of grassroots management departments， in order to provide decisionmaking reference for soil environmental management in Jiangsu Province.