scholarly journals Influence of Water Hardness on Silver Ion and Silver Nanoparticle Fate and Toxicity TowardNitrosomonas europaea

2014 ◽  
Vol 31 (7) ◽  
pp. 403-409 ◽  
Author(s):  
Joseph W. Anderson ◽  
Lewis Semprini ◽  
Tyler S. Radniecki
Keyword(s):  
Silver Nanoparticle ◽  
Water Hardness ◽  
Silver Ion ◽  
Influence Of Water

Influence of Water Hardness and Co-applied Herbicides on Saflufenacil Efficacy

2012 ◽  
Vol 11 (1) ◽  
pp. 1-8 ◽  
Author(s):  
Jared M. Roskamp ◽  
Gurinderbir S. Chahal ◽  
William G. Johnson
Keyword(s):  
Water Hardness ◽  
Influence Of Water

Effect of solution pH and influence of water hardness on caffeine adsorption onto activated carbons

2014 ◽  
Vol 93 (1) ◽  
pp. 68-77 ◽  
Author(s):  
Osorio Moreira Couto ◽  
Inês Matos ◽  
Isabel Maria da Fonseca ◽  
Pedro Augusto Arroyo ◽  
Edson Antônio da Silva ◽  
...  
Keyword(s):  
Activated Carbons ◽  
Water Hardness ◽  
Solution Ph ◽  
Influence Of Water

Influence of water hardness on acute toxicity of copper and zinc on fish

2010 ◽  
Vol 26 (6) ◽  
pp. 361-365 ◽  
Author(s):  
Mohammad Ebrahimpour ◽  
Hosain Alipour ◽  
Solaiman Rakhshah
Keyword(s):  
Acute Toxicity ◽  
Water Hardness ◽  
Copper And Zinc ◽  
Influence Of Water

scholarly journals THE INFLUENCE OF WATER HARDNESS AND DIETARY CALCIUM ON GROWTH AND SURVIVAL OF POSTLARVAL PRAWN,, Macrabrachium rosenbergii

2017 ◽  
Vol 5 (1) ◽  
pp. 1
Author(s):  
M. Fatuchri Sukadi
Keyword(s):  
Water Hardness ◽  
Dietary Calcium ◽  
Freshwater Prawn ◽  
Growth And Survival ◽  
Influence Of Water

The influence of water hardness on survival of freshwater prawn, Macrobrachiumrosenbergii was investigated in indoor tanks during a 132-day study.

scholarly journals Silver Nanoparticle Formation on Metal Substrate Under Concentration-Limited Condition

2016 ◽  
Vol 4 (3) ◽  
Author(s):  
Yong X. Gan ◽  
Gustavo R. Tavares ◽  
Rafhael S. Gonzaga ◽  
Ryan N. Gan
Keyword(s):  
Silver Nanoparticles ◽  
Silver Nanoparticle ◽  
Pure Aluminum ◽  
Glass Tube ◽  
Silver Ion ◽  
Ion Concentration ◽  
Limited Condition ◽  
Self Assembling ◽  
Working Electrode ◽  
Average Size

Silver nanoparticles were electrodeposited from 0.3 M oxalic acid electrolyte on a pure aluminum working electrode under silver ion concentration-limited condition. A silver wire was held in a glass tube containing 1.0 M KCl solution as the counter electrode. Ion exchange between the glass tube and the main electrodeposition bath through a capillary was driven by the overpotentials as high as 10 V supplied by an electrochemical workstation. Due to the reaction between chlorine anion and silver cation to form AgCl solid at the Ag/AgCl electrode, the silver ion concentration-limited condition holds in the electrolyte. It is found that silver grows at the aluminum working electrode to form nanoparticles with an average size of about 52.4 ± 13.6 nm. With the increasing of the deposition time, the silver nanoparticles aggregate into clusters. The silver particle clusters are separated with approximately 112.6 ± 19.7 nm due to the hydrogen bubble-induced self-assembling, which is shown by the confined deposition of silver on a gold coating. The surface roughness of the aluminum substrate leads to the reduced uniformity of silver nanoparticle nucleation and growth.

Silver nanoparticle enhanced silver ion stress response inEscherichia coliK12

2011 ◽  
Vol 6 (8) ◽  
pp. 857-866 ◽  
Author(s):  
Jonathan S. McQuillan ◽  
Heidi Groenaga Infante ◽  
Emma Stokes ◽  
Andrew M. Shaw
Keyword(s):  
Stress Response ◽  
Silver Nanoparticle ◽  
Silver Ion

Influence of Water Chemistry on Size Structure of Zooplankton Assemblages

1990 ◽  
Vol 47 (10) ◽  
pp. 1937-1943 ◽  
Author(s):  
Alan J. Tessier ◽  
Richard J. Horwitz
Keyword(s):  
Water Chemistry ◽  
Significant Variation ◽  
Size Structure ◽  
Water Hardness ◽  
Hard Water ◽  
The Body ◽  
Zooplankton Abundance ◽  
High Calcium ◽  
Influence Of Water ◽  
Physical And Chemical

A stratified-random selection of all lakes in the northeastern United States was sampled for zooplankton composition, and physical and chemical characteristics during midsummer 1986. In all, 146 lakes were sampled from five geographic subregions and three categories of water alkalinity. There was no significant variation in total zooplankton abundance among regions or alkalinity categories; however, the body-size structure of assemblages was dependent on both alkalinity and geographic subregion. The largest change in size structure occurred at alkalinity levels > 150 μeq∙L−1 and pH > 7.0, and appeared less related to change in pH than to variation in water hardness. This shift of size structure was caused by a loss of large-bodied zooplankton and an increase in small rotifers with decreasing water hardness. Exploratory analysis revealed that lake stratification also explained significant variation in zooplankton size structure, but was largely independent of the effects of water chemistry. We hypothesize that the association of large zooplankton with hard water is casual; large-bodied cladocerans may require high calcium levels.

Combined filter for ammonia removal – part I: Minimal zeolite contact time and requirements for desorption

1999 ◽  
Vol 39 (8) ◽  
pp. 123-129 ◽  
Author(s):  
G. Dimova ◽  
G. Mihailov ◽  
Tz. Tzankov
Keyword(s):  
Ion Exchange ◽  
Contact Time ◽  
Water Hardness ◽  
Ammonia Concentration ◽  
Water Velocity ◽  
Ammonia Removal ◽  
Design Parameters ◽  
Influence Of Water ◽  
Minimal Contact ◽  
Differential Element

The minimal contact time in removal of ammonia ions by ion-exchange with zeolite, Na-form, is determined using the method of differential element. The relationship between the contact time, the water velocity, the effect of removal and the initial ammonia concentration is investigated. The obtained data serve as a basis for mathematical modeling of the ion exchange kinetics and give valuable information about some design parameters of ion-exchange facilities. Some basic analyses, concerning the desorption of ammonia from zeolite, induced mainly from the cations naturally present in surface waters are made. The influence of water velocity and water hardness on such desorption is investigated. These experimental data and analyses are an essential part of a study, the purpose of which is to investigate the possibilities for ammonia removal and biological regeneration of zeolite in a combined facility, using the processes: ion-exchange, desorption induced by small concentrations of cations and biological nitrification.

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