scholarly journals Transport Behavior of Engineered Nanosized Photocatalytic Materials in Water

2013 ◽  
Vol 2013 ◽  
pp. 1-13 ◽  
Author(s):  
Guang’an He ◽  
Hong Liu ◽  
Rui Chen ◽  
Chuan Wang
Keyword(s):  
Ph Value ◽  
State Of The Art ◽  
Fate And Transport ◽  
Water Systems ◽  
Important Application ◽  
Engineered Nanoparticles ◽  
Ionic Valence ◽  
Wastewater Systems ◽  
Potential Risks ◽  
Detection Technologies

Engineered nanoparticles (ENPs) possess unique properties and are employed in many sectors, and thus their release into environment remains. The potential risks of ENPs have been confirmed by an increasing number of studies that necessitate a better knowledge to the fate and transport of ENPs. One important application of ENP is photocatalysis for production of H2as energy and pollutant decomposition. Engineered photocatalytic nanoparticles (PCNPs) can also easily enter the environment with the rapid increase in its manufacture and use. This review focuses on the transport of PCNPs in water by addressing the important factors that determine the transport of PCNPs, such as particle size, pH value, ionic strength (IS), ionic valence, and organic matter. The transport of PCNPs in natural water systems and wastewater systems is also presented with an attempt to provide more abundant information. In addition, the state of the art of the detection technologies of PCNPs has been covered.

scholarly journals Describing Phosphorus Sorption Processes on Volcanic Soil in the Presence of Copper or Silver Engineered Nanoparticles

Minerals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 373
Author(s):  
Jonathan Suazo-Hernández ◽  
Erwin Klumpp ◽  
Nicolás Arancibia-Miranda ◽  
Patricia Poblete-Grant ◽  
Alejandra Jara ◽  
...  
Keyword(s):  
Organic Matter ◽  
Crop Production ◽  
Agricultural Soils ◽  
Ph Value ◽  
Consumer Products ◽  
Soil Samples ◽  
Engineered Nanoparticles ◽  
P Availability ◽  
Agricultural Crop ◽  
Phosphorus Sorption

Engineered nanoparticles (ENPs) present in consumer products are being released into the agricultural systems. There is little information about the direct effect of ENPs on phosphorus (P) availability, which is an essential nutrient for crop growthnaturally occurring in agricultural soils. The present study examined the effect of 1, 3, and 5% doses of Cu0 or Ag0 ENPs stabilized with L-ascorbic acid (suspension pH 2–3) on P ad- and desorption in an agricultural Andisol with total organic matter (T-OM) and with partial removal of organic matter (R-OM) by performing batch experiments. Our results showed that the adsorption kinetics data of H2PO4− on T-OM and R-OM soil samples with and without ENPs were adequately described by the pseudo-second-order (PSO) and Elovich models. The adsorption isotherm data of H2PO4− from T-OM and R-OM soil samples following ENPs addition were better fitted by the Langmuir model than the Freundlich model. When the Cu0 or Ag0 ENPs doses were increased, the pH value decreased and H2PO4− adsorption increased on T-OM and R-OM. The H2PO4− desorption (%) was lower with Cu0 ENPs than Ag0 ENPs. Overall, the incorporation of ENPs into Andisols generated an increase in P retention, which may affect agricultural crop production.

International standards for services activities relating to drinking water supply systems and wastewater systems: Implications for developing countries

2006 ◽  
Vol 53 (6) ◽  
pp. 75-82
Author(s):  
S. Lee ◽  
D. Cha ◽  
H. Park
Keyword(s):  
Developing Countries ◽  
Drinking Water ◽  
Water Systems ◽  
International Standards ◽  
Water Supply Systems ◽  
System Quality ◽  
Wastewater Systems ◽  
Service Standards ◽  
Supply Systems

In developing countries, the PPP (Public–Private–Partnerships) programs have been unsatisfied during the last decade. This study analyzed one of the main causes is low quality of the system. That is, no matter what supports developing countries may get through PPP, reforming water systems can be hardly successful without appropriate system quality. With this background, this study introduces service standards of ISO/TC 224 as an option to improve system quality of developing countries. To analyze its effects, system dynamic modeling was conducted. The results indicated that service standards, working with the PPP programs, can benefit all the stakeholders involved in the water systems in developing countries. Also this indicates further that this approach with service standards deserves more detailed study for improving the ailing water systems in developing countries.

Development of a model (SWNano) to assess the fate and transport of TiO2 engineered nanoparticles in sewer networks

2019 ◽  
Vol 375 ◽  
pp. 290-296 ◽  
Author(s):  
Ki-Eun Kim ◽  
Yu Sik Hwang ◽  
Min-Hee Jang ◽  
Jee Hey Song ◽  
Hee Seok Kim ◽  
...  
Keyword(s):  
Fate And Transport ◽  
Engineered Nanoparticles ◽  
Sewer Networks

Engineered nanoparticles and organic matter: A review of the state-of-the-art

Chemosphere ◽  
2015 ◽  
Vol 119 ◽  
pp. 608-619 ◽  
Author(s):  
Renato Grillo ◽  
André H. Rosa ◽  
Leonardo F. Fraceto
Keyword(s):  
Organic Matter ◽  
State Of The Art ◽  
The State ◽  
Engineered Nanoparticles

Instrumentation, control and automation in the water industry – state-of-the-art and new challenges

2006 ◽  
Vol 53 (4-5) ◽  
pp. 1-16 ◽  
Author(s):  
G. Olsson
Keyword(s):  
Distribution System ◽  
Water Distribution ◽  
Water Distribution System ◽  
State Of The Art ◽  
Water Industry ◽  
Treatment Processes ◽  
Key Technologies ◽  
Wastewater Systems ◽  
Water And Wastewater ◽  
New Challenges

Instrumentation, control and automation (ICA) are key technologies in modern water and wastewater systems. Ever present disturbances make it necessary to automatically attenuate their consequences. A wastewater treatment system is load driven, while a water distribution system is demand driven. Despite the variability the system outputs have to be satisfactory. Economic realities encourages the application of ICA to make a maximum use of plant capacities. An increasing complexity of competing processes in a modern nutrient removal plant makes more elaborate control necessary. The final goal of protecting the environmental resources necessitates an integrated view of several interdependent systems, the collection, transport and treatment processes. In this integrating development ICA will be a decisive technology.

Delivery, uptake, fate, and transport of engineered nanoparticles in plants: a critical review and data analysis

2019 ◽  
Vol 6 (8) ◽  
pp. 2311-2331 ◽  
Author(s):  
Yiming Su ◽  
Vanessa Ashworth ◽  
Caroline Kim ◽  
Adeyemi S. Adeleye ◽  
Philippe Rolshausen ◽  
...  
Keyword(s):  
Data Analysis ◽  
Critical Review ◽  
Agricultural Practices ◽  
Fate And Transport ◽  
Engineered Nanoparticles ◽  
Environmental Pressures ◽  
Increasing Demand ◽  
Sustainable Agricultural Practices

The increasing demand for food coupled to various environmental pressures, is increasing the importance of sustainable agricultural practices.

Fate and Transport of Selected Herbicides in an Estuarine Environment

1983 ◽  
Vol 40 (S2) ◽  
pp. s337-s345 ◽  
Author(s):  
J. C. Means ◽  
R. D. Wijayaratne ◽  
W. R. Boynton
Keyword(s):  
Chesapeake Bay ◽  
Water Column ◽  
Fate And Transport ◽  
Water Systems ◽  
Estuarine Environment ◽  
Estuarine Sediments ◽  
Equilibrium Sorption ◽  
Degradation Rates ◽  
Hydrophobic Pollutants ◽  
Ambient Levels

Representative compounds from three classes of herbicides (atrazine, linuron, and treflan) were studied to determine ambient levels in the Chesapeake Bay and its tributaries during portions of 1980. All levels were 1 μg/L or less, and all three herbicides exhibited non-conservative behavior in the estuary. Concentrations of herbicides in runoff from a defined watershed did not exceed 9 μg/L. Degradation rates for all three herbicides in estuarine sediment-water systems were 2–10 times greater than those reported for soils. Equilibrium sorption constants (Koc) of estuarine sediments were similar to soils, but suspended colloids were found to sorb atrazine and linuron 10–30 times more strongly on a per gram of carbon basis, suggesting that refractory hydrophobic pollutants may be transported greater distances in the water column than previously assumed. However, the large degradative capacity of the estuarine community may act to prevent transport of labile organics from the land to the oceans.

Industrial Facilities

1991 ◽  
Vol 7 (2_suppl) ◽  
pp. 49-58
Author(s):  
Sam W. Swan ◽  
Ronald O. Hamburger
Keyword(s):  
Seismic Vulnerability ◽  
Electrical Power ◽  
Water Systems ◽  
Severe Damage ◽  
Secondary Importance ◽  
Industrial Facilities ◽  
Port Facilities ◽  
Oil Pipelines ◽  
Wastewater Systems ◽  
Agricultural Operations

This earthquake illustrates the seismic vulnerability of an agriculture-based economy that is centered in sparsely populated regions. Agricultural operations depend on lifelines—roads, railways, electrical power, potable and wastewater systems, and port facilities. There is an indirect dependence on refineries and oil pipelines to ensure a supply of fuel to the region, in order to keep the machinery of other lifelines running. The earthquake caused severe damage to roads, railways, bridges and water systems. As a result, shipments of produce were severely impaired. With loss of the means to transport products, damage to operations, such as shipping centers, assumed a secondary importance.

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