نتایج جستجو برای: water copper

تعداد نتایج: 626047  

2014
John P. McHale S V. Garimella Timothy S. Fisher Glen A. Powell Suresh V. Garimella

Pool boiling heat transfer is measured with two individual working fluids on copper surfaces enhanced with sintered copper powder and carbon nanotubes. The working fluids are a segregated hydrofluoroether, HFE-7300, and deionized water. The surfaces considered in the experiments include smooth copper, copper with sintered copper particles, smooth copper with copper-coated carbon nanotubes (CNT)...

Journal: :The journal of physical chemistry. A 2010
Obaidur Rahaman Adri C T van Duin Vyacheslav S Bryantsev Jonathan E Mueller Santiago D Solares William A Goddard Douglas J Doren

Copper ions play crucial roles in many enzymatic and aqueous processes. A critical analysis of the fundamental properties of copper complexes is essential to understand their impact on a wide range of chemical interactions. However the study of copper complexes is complicated by the presence of strong polarization and charge transfer effects, multiple oxidation states, and quantum effects like ...

2017
Yahui Zhang Wenchao Zang Lumei Qin Lei Zheng Ying Cao Zhenguang Yan Xianliang Yi Honghu Zeng Zhengtao Liu

The bioavailability and toxicity of metals to aquatic organisms are highly dependent on water quality parameters in freshwaters. The biotic ligand model (BLM) for copper is an approach to generate the water quality criteria (WQC) with water chemistry in the ambient environment. However, few studies were carried out on the WQCs for copper based on the BLM approach in China. In the present study,...

Journal: :Environmental toxicology and chemistry 2009
Tiffany L Linbo David H Baldwin Jenifer K McIntyre Nathaniel L Scholz

Conventional water chemistry parameters such as hardness, alkalinity, and organic carbon are known to affect the acutely lethal toxicity of copper to fish and other aquatic organisms. In the present study, we investigate the influence of these water chemistry parameters on short-term (3 h), sublethal (0-40 microg/L) copper toxicity to the peripheral mechanosensory system of larval zebrafish (Da...

Journal: :Journal of environmental biology 2016
Bhalchandra Waykar Ram Petare

The concentrations of zinc, copper, cadmium and lead in surface water, sediments and two native snail species, Bellamya bengalensis and Melanoides tuberculata from Latipada reservoir were determined. The concentrations of cadmium and lead in surface water were higher than the WHO recommended limits for drinking water standards; where as those of zinc and copper were within the permissible limit...

2010
Jia Tang Andrea M. Dietrich Daniel L. Gallagher Marc A. Edwards Andrea Dietrich Daniel Gallagher Marc Edwards Robert Moore Julie Petruska Jody Smiley Susan Mirlohi Jose Cerrato

Properties of both chemical contaminants and polymers can impact contaminant diffusivity and solubility in new and aged polyethylene materials for pipes and geomembranes. Diffusivity, solubility, polymer and chemical properties were measured for thirteen contaminants and six polyethylene materials that were new and/or aged in chlorinated water. Tree regression was used to select variables, and ...

Journal: :Aquatic toxicology 2004
Bruce A O'Gara V Kim Bohannon Matthew W Teague Michael B Smeaton

The behavioral and neurotoxic effects of copper exposure were examined in the freshwater oligochaete, Lumbriculus variegatus. The 24 h LC50 for worms exposed to copper sulfate in an artificial pond water was 0.45 microM. Almost all animals that died due to copper exposure died during the first day of exposure. Immersion in water containing 0.2 or 0.4 microM copper produced time- and concentrati...

Journal: :Environmental research 2007
Kristen N Buck John R M Ross A Russell Flegal Kenneth W Bruland

Following basin-wide contamination from industrial emissions and urban development, total dissolved copper concentrations in some regions of San Francisco Bay have exceeded national and state guidelines for water quality. In the face of dramatic improvements in wastewater treatment and point source control, persisting elevated dissolved copper concentrations in the Bay have prompted multiple st...

Journal: :Environmental Health Perspectives 1993
E A Murphy

Samples from drinking water fountains in 50 schools in New Jersey were collected at specific times during a typical school day and analyzed for lead, copper, pH, alkalinity, and hardness. First-draw lead and copper levels (medians 0.010 mg/l and 0.26 mg/l, respectively) decreased significantly after 10 min of flushing in the morning (medians 0.005 mg/l lead and 0.068 mg/l copper), but levels in...

Journal: Nanochemistry Research 2019

The burden of life on the earth is the source of biological contamination in water. Nanotechnology has promising contributions in control of microbial contaminations and medicinal plants further increase these properties. Presently, copper acetate and nickel oxide nanoparticles were synthesized using 1mM solution of each with Ziziphus mauritiana leaves extract as reducing agent. Nanoparticles w...

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