scholarly journals Levels and Distribution of Organophosphate Esters (OPEs) in Typical Megacity Wetland Park Landscape Water Bodies in Southwest China

2021 ◽  
Author(s):  
Hongling Yin ◽  
Liya Liu ◽  
Qin Liu ◽  
Jiaojiao Song ◽  
Shuhong Fang ◽  
...  
Keyword(s):  
Southwest China ◽  
Water Bodies ◽  
Organophosphate Esters ◽  
Landscape Water

scholarly journals Levels and Distribution of Organophosphate Esters (OPEs) in Typical Megacity Wetland Park Landscape Water Bodies in Southwest China

2021 ◽  
Author(s):  
Hongling Yin ◽  
Liya Liu ◽  
Qin Liu ◽  
Jiaojiao Song ◽  
Shuhong Fang ◽  
...  
Keyword(s):  
Surface Water ◽  
Southwest China ◽  
Hydraulic Retention Time ◽  
Average Concentration ◽  
Water Bodies ◽  
Organophosphate Esters ◽  
Sediment Samples ◽  
Suspended Particulate ◽  
Landscape Water ◽  
The City

Abstract Human activities have led to the release of organophosphate esters (OPEs) into the environment. This study aims to investigate the levels and partitioning of OPEs in surface water, suspended particulate matter (SPM) and sediments of landscape waters across eleven parks in the city of Chengdu, a megacity in Southwest China. The average concentration of Σ6OPEs in the SPM samples (median: 2.94×103 ng/L, 6.88×104 ng/g dw) was 1-3 orders of magnitude higher than that in the surface water (median: 359 ng/L) and sediment (median: 82.8 ng/g) samples. Tri-n-butyl phosphate (TnBP), tris-(2-chloroethyl)-phosphate (TCEP) and trichloropropyl phosphate (TCIPP) were the primary OPE pollutants in the surface water and SPM samples, while TnBP, tris-(2-butoxyethyl) phosphate (TBEP) and tris-(2-ethylhexyl) phosphate (TEHP) predominated the sediment samples. The higher log Koc values of OPEs in park landscape water bodies than other studies in the present study could be explained by the OPE properties (foc, Kow, degradability) and the environmental conditions (the input sources and the hydraulic retention time, etc.).

scholarly journals Measurement report: Seasonality, distribution and sources of organophosphate esters in PM<sub>2.5</sub> from an inland urban city in Southwest China

2020 ◽  
Vol 20 (23) ◽  
pp. 14933-14945
Author(s):  
Hongling Yin ◽  
Jinfeng Liang ◽  
Di Wu ◽  
Shiping Li ◽  
Yi Luo ◽  
...  
Keyword(s):  
Urban Areas ◽  
Southwest China ◽  
Principal Component ◽  
Nonparametric Tests ◽  
Industrial Emissions ◽  
Traffic Emission ◽  
Organophosphate Esters ◽  
Urban City ◽  
Significant Difference ◽  
Plastics Industry

Abstract. Organophosphate esters (OPEs) are contaminants of emerging concern, and studies have concluded that urban areas are a significant source of OPEs. Samples were collected from six ground-based sites located in Chengdu, a typical rapidly developing metropolitan area in Southwest China, and were analyzed for seven OPEs in atmospheric PM2.5 (Σ7 OPEs). The concentrations of Σ7 OPEs in PM2.5 ranged from 5.83 to 6.91 ng m−3, with a mean of 6.6 ± 3.3 ng m−3, and the primary pollutants were tris-(2-butoxyethyl) phosphate (TBEP), tri-n-butyl phosphate (TnBP), tris-(2-chloroethyl) phosphate (TCEP) and tris-(2-chloroisopropyl) phosphate (TCPP), which together made up more than 80 % of the Σ7 OPEs. The concentrations of Σ7 OPEs were higher in autumn and winter than in summer. Nonparametric tests showed that there was no significant difference in Σ7 OPE concentrations among the six sampling sites, but the occurrence of unexpectedly high levels of individual OPEs at different sites in autumn might indicate noteworthy emissions. A very strong correlation (R2 = 0.98, p < 0.01) between the OPEs in soil and in PM2.5 was observed. Backward trajectory analysis indicated that the OPEs in PM2.5 were mainly affected by local sources. Principal component analysis (PCA) revealed that the OPEs in PM2.5 were largely sourced from the plastics industry, interior decoration and traffic emission (34.5 %) and the chemical, mechanical and electrical industries (27.8 %), while the positive matrix factorization (PMF) model revealed that the main sources were the plastics industry and indoor source emissions, the food and cosmetics industry and industrial emissions. In contrast to coastal cities, sustained and stable high local emissions in the studied inland city were identified, which is particularly noteworthy. Chlorinated phosphates, especially TCPP and TCEP, had a high content, and their usage and source emissions should be controlled.

scholarly journals Research on efficient and economical treatment methods for algal pollution in landscape water

2021 ◽  
Vol 245 ◽  
pp. 02028
Author(s):  
Liu Zehua ◽  
Liu Chaolong ◽  
Zhao Wenyu
Keyword(s):  
Water Body ◽  
Water Bodies ◽  
Treatment Methods ◽  
Algae Removal ◽  
Landscape Water

A water body in Guilin was selected for this study. In order to find out the best dosing ratio, we conducted research experiments on combined algae removal methods and obtained a more economical and efficient mixed dosing ratio for treating water bodies. If this solution is replicated, it will contribute to the development of marine and freshwater fisheries; to the construction of a green ecosystem and human public healt.

scholarly journals Measurement report: Seasonal, distribution and sources of organophosphate esters in PM<sub>2.5</sub> from an inland urban city in southwest China

2020 ◽  
Author(s):  
Hongling Yin ◽  
Jiangfeng Liang ◽  
Di Wu ◽  
Shiping Li ◽  
Yi Luo ◽  
...  
Keyword(s):  
Emerging Contaminants ◽  
Southwest China ◽  
Nonparametric Test ◽  
Seasonal Distribution ◽  
Urban Centers ◽  
Organophosphate Esters ◽  
Urban City ◽  
Significant Difference ◽  
High Level ◽  
Atmospheric Pm2.5

Abstract. Organophosphate esters (OPEs) are emerging contaminants in recent years and studies concluded that urban centers were a significant source of OPEs. Samples were collected from six ground-based sites located in Chengdu, a typical fast developing metropolitan of southwest China and were analyzed for seven OPEs in atmospheric PM2.5. The concentrations of Σ7OPEs in PM2.5 ranged from 5.83 to 6.91 ng m−3, with a mean of 6.6 ± 3.3 ng m−3, and the primary pollutants were TBEP, TnBP, TCEP and TCPP which made up more than 80 % in the Σ7OPEs. The concentrations of Σ7OPEs were higher in autumn/winter than that in summer. Nonparametric test showed that there was no significant difference in Σ7OPEs concentrations among the six sampling sites, but the occurence of unexpected high level of individual OPEs at different sites in autumn might indicate that there was a noteworthy emission. Very strong correlation (R2 = 0.98, p 

scholarly journals Pollution Characteristics and Emissions of Typical Organophosphate Esters From a Wastewater Treatment Plant in Chengdu, China

2021 ◽  
Author(s):  
Hongling Yin ◽  
Yi Luo ◽  
Jiaojiao Song ◽  
Shiping Li ◽  
Shuyu Lin ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Southwest China ◽  
Wastewater Treatment Plants ◽  
Removal Rate ◽  
Treatment Plant ◽  
Total Removal ◽  
Organophosphate Esters ◽  
Rainy Period ◽  
Influent Water ◽  
Daily Discharge

Abstract Effluent from wastewater treatment plants (WWTP) is an important source of organophosphate esters (OPEs) in the receiving rivers. In this paper, the concentration and distribution of seven OPEs in the water samples were determined, and the discharge was estimated. The results showed that the total removal rate of Σ7OPEs in water phase in WWTP was 57.2%. The average concentrations of Σ7OPEs in influent and effluent of the WWTP during rainy period were 3956.1 ± 1897.3 ng/L and 1461.9 ± 846.3 ng/L, respectively, which were about 4 times larger than those in influent water (978.2 ± 166.5 ng/L) and effluent (418.3 ± 12.0 ng/L) during non-rainy period, indicating that rainfall has a marked impact on the load of OPEs in WWTP and the receiving water. It was estimated that the average daily discharge of Σ7OPEs in the effluent of WWTP was 157.9 g, and the daily per capita contribution of the population in the area to the OPEs in the influent was 0.414 mg. During the shift of labour-intensive manufacturing from the coastal developed areas to inland regions, OPEs were widely used and produced in Southwest China. The total amount of OPEs emissions and its control should be taken into consideration.

Using species distribution modeling to improve conservation of medicinal plants in Southwest China

Planta Medica ◽  
2016 ◽  
Vol 81 (S 01) ◽  
pp. S1-S381
Author(s):  
B Liu ◽  
F Li ◽  
Z Guo ◽  
L Hong ◽  
W Huang ◽  
...  
Keyword(s):  
Medicinal Plants ◽  
Species Distribution ◽  
Southwest China ◽  
Species Distribution Modeling ◽  
Distribution Modeling
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