Effect of the orientation and fluid flow on the accumulation of organotin compounds to Chemcatcher passive samplers

2015 ◽  
Vol 17 (4) ◽  
pp. 813-824 ◽  
Author(s):  
H. Ahkola ◽  
J. Juntunen ◽  
M. Laitinen ◽  
K. Krogerus ◽  
T. Huttula ◽  
...  
Keyword(s):  
Fluid Flow ◽  
Environmental Conditions ◽  
Passive Sampling ◽  
Passive Samplers ◽  
Organotin Compounds ◽  
Environmental Legislation ◽  
Sampling Process

The effect of environmental conditions on the passive sampling process should be understood to estimate the concentration of chemical required by environmental legislation.

Modelling permeation passive sampling: intra-particle resistance to mass transfer and comprehensive sensitivity analysis

2019 ◽  
Vol 21 (3) ◽  
pp. 469-484 ◽  
Author(s):  
Faten Salim ◽  
Marios Ioannidis ◽  
Alexander Penlidis ◽  
Tadeusz Górecki
Keyword(s):  
Mathematical Model ◽  
Mass Transfer ◽  
Sensitivity Analysis ◽  
Passive Sampling ◽  
Passive Samplers ◽  
Porous Particles ◽  
Sampling Process ◽  
Porous Adsorbents

A mathematical model developed previously to describe the sampling process in permeation passive samplers with non-porous adsorbents and evaluated using the Waterloo Membrane Sampler (WMS) is here extended to include adsorbents with porous particles.

scholarly journals Development of passive sampler POCIS for the analysis of polar pesticides in surface water

2015 ◽  
Vol 18 (2) ◽  
pp. 132-144
Author(s):  
Trang Thi Nhu Tran ◽  
Ty Thi Pham ◽  
Hai Lam Son Truong
Keyword(s):  
Surface Water ◽  
Environmental Factors ◽  
Pesticide Residues ◽  
Passive Sampling ◽  
Sampling Method ◽  
Passive Sampler ◽  
Polar Pesticides ◽  
Sampling Process ◽  
European Standards ◽  
First Time

The first time in Vietnam a passive sampling method has been developed to analyse the polar pesticides in surface water. The initial investigations of POCIS were performed for 7 polar pesticides as simazine,thiodicarb, carbofuran, chlortoluron, atrazine, isoproturon, and diuron. We determined the sampling rates RS for these substances ranged from 0.369 to 0.962 L day- 1. The obtained values of ku and RS showed the important influence of environmental factors such as flow on the ability to integrate polar pesticides in passive sampling process. This method can be applied to determine these 7 polar pesticides in surface water at trace levels according to European standards for pesticide residues in water (< 0.1 μg L-1).

scholarly journals Relationships between Passive Sampler and Continuous Ozone (O3) Measurement Data in Ecological Effects Research

2001 ◽  
Vol 1 ◽  
pp. 593-601 ◽  
Author(s):  
S. Krupa ◽  
M. Nosal
Keyword(s):  
Continuous Monitoring ◽  
Passive Sampling ◽  
Passive Sampler ◽  
Ecological Effects ◽  
Passive Samplers ◽  
Cumulative Exposure ◽  
Generic Model ◽  
Monitoring Site ◽  
Frequency Distributions ◽  
Continuous Monitor

In ecological effects research, there is a rapid increase in the application of passive sampling techniques for measuring ambient ozone (O3) concentrations. Passive samplers provide data on cumulative exposures of a plant to a pollutant. However, O3is not an accumulative contaminant within the plant tissue, and use of prolonged passive sampling durations cannot account for the dynamics of the occurrences of O3that have a significant influence on the plant response. Therefore, a stochastic Weibull probability model was previously developed and applied to a site in Washington State (1650 m MSL) to simulate the cumulative exposure data from a passive sampler, to mimic the corresponding frequency distributions of hourly O3concentrations that would otherwise have been obtained by continuous monitoring. At that site the correlation between the actual passive sampler and the continuous monitor data was R2 = 0.74. The simulation of the hourly O3data was based on and compared with the results obtained from a colocated continuous monitor. In this paper we report the results of the model application to data from an unrelated monitoring site (New Hampshire, 476 m MSL) with poor correlation between the passive sampling and continuous monitoring (R2 = 0.24). In addition, as opposed to the previous work, we provide comparisons of the frequency distributions of the hourly O3concentrations obtained by the simulation and the actual continuous monitoring. In spite of the major difference in the R2 values, at both sites the simulation provided very satisfactory results within the 95% confidence interval, suggesting its broad applicability. The final objective of this overall approach is to develop a generic model that can simulate reasonably well the occurrences of ambient O3concentrations that are dependent upon the elevation of the measurement site and the synoptic and local meteorology. Such an effort would extend the relative utility of the passive sampling data in explaining stochastic plant responses.

Passive sampling for volatile organic compounds in indoor air-controlled laboratory comparison of four sampler types

2015 ◽  
Vol 17 (5) ◽  
pp. 896-905 ◽  
Author(s):  
Todd McAlary ◽  
Hester Groenevelt ◽  
Stephen Disher ◽  
Jason Arnold ◽  
Suresh Seethapathy ◽  
...  
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Indoor Air ◽  
Passive Sampling ◽  
Passive Samplers ◽  
Volatile Organic

Chamber tests were conducted using 4 passive samplers, 10 VOCs, and three levels of temperature, humidity, velocity, duration and concentration.

scholarly journals Comparison of sampling methodologies for nutrient monitoring in streams: uncertainties, costs and implications for mitigation

2014 ◽  
Vol 18 (11) ◽  
pp. 4721-4731 ◽  
Author(s):  
J. Audet ◽  
L. Martinsen ◽  
B. Hasler ◽  
H. de Jonge ◽  
E. Karydi ◽  
...  
Keyword(s):  
Aquatic Ecosystems ◽  
Passive Sampling ◽  
Mitigation Strategies ◽  
Passive Samplers ◽  
Nutrient Load ◽  
Monitoring Methods ◽  
Nitrogen And Phosphorus ◽  
Grab Sampling ◽  
Reliable Monitoring ◽  
Phosphorus Losses

Abstract. Eutrophication of aquatic ecosystems caused by excess concentrations of nitrogen and phosphorus may have harmful consequences for biodiversity and poses a health risk to humans via water supplies. Reduction of nitrogen and phosphorus losses to aquatic ecosystems involves implementation of costly measures, and reliable monitoring methods are therefore essential to select appropriate mitigation strategies and to evaluate their effects. Here, we compare the performances and costs of three methodologies for the monitoring of nutrients in rivers: grab sampling; time-proportional sampling; and passive sampling using flow-proportional samplers. Assuming hourly time-proportional sampling to be the best estimate of the "true" nutrient load, our results showed that the risk of obtaining wrong total nutrient load estimates by passive samplers is high despite similar costs as the time-proportional sampling. Our conclusion is that for passive samplers to provide a reliable monitoring alternative, further development is needed. Grab sampling was the cheapest of the three methods and was more precise and accurate than passive sampling. We conclude that although monitoring employing time-proportional sampling is costly, its reliability precludes unnecessarily high implementation expenses.

Suitability of Chemcatcher® passive sampling in monitoring organotin compounds at a wastewater treatment plant

2016 ◽  
Vol 2 (4) ◽  
pp. 769-778 ◽  
Author(s):  
H. Ahkola ◽  
J. Juntunen ◽  
K. Krogerus ◽  
T. Huttula ◽  
S. Herve ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Passive Sampling ◽  
Municipal Wastewater ◽  
Treatment Plant ◽  
Organotin Compounds

Municipal wastewater contains a number of harmful chemicals whose concentrations can fluctuate dramatically.

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