De Icing Salts
De Icing Salts - Related Videos
04:08
Determining the pH of Salt Solutions
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2020
The pH of a salt solution is determined by its component anions and cations. Salts that contain pH-neutral anions and the hydronium ion-producing cations form a solution with a pH less than 7. For example, in ammonium nitrate (NH4NO3) solution, NO3− ions do not react with water whereas NH4+ ions produce the hydronium ions resulting in the acidic solution. In contrast, salts that contain pH-neutral cations and the hydroxide ion-producing anions form a solution with a pH greater than 7. For...
02:02
Responses to Salt Stress
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2020
Salt stress—which can be triggered by high salt concentrations in a plant’s environment—can significantly affect plant growth and crop production by influencing photosynthesis and the absorption of water and nutrients. Plant cell cytoplasm has a high solute concentration, which causes water to flow from the soil into the plant due to osmosis. However, excess salt in the surrounding soil increases the soil solute concentration, reducing the plant’s ability to take up water. High levels of...
09:43
Identification of Plant Ice-binding Proteins Through Assessment of Ice-recrystallization Inhibition and Isolation Using Ice-affinity Purification
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Cited by 5 •
2017
This paper outlines the identification of ice-binding proteins from freeze-tolerant plants through the assessment of ice-recrystallization inhibition activity and subsequent isolation of native IBPs using ice-affinity purification.
09:36
The Use of High-resolution Infrared Thermography (HRIT) for the Study of Ice Nucleation and Ice Propagation in Plants
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Cited by 27 •
2015
Here we present a protocol that allows one to visualize sites of ice formation and avenues of ice propagation in plants utilizing high resolution infrared thermography (HRIT).
08:46
Determining the Ice-binding Planes of Antifreeze Proteins by Fluorescence-based Ice Plane Affinity
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Cited by 48 •
2014
Antifreeze proteins (AFPs) bind to specific planes of ice to prevent or slow ice growth. Fluorescence-based ice plane affinity (FIPA) analysis is a modification of the original ice-etching method for determination of AFP-bound ice planes. AFPs are fluorescently labeled, incorporated into macroscopic single ice crystals, and visualized under UV light.
FAQs
Once salt dissolves, it forms brine whose dissolved ions interfere with water’s freezing behavior, allowing ice to melt at temperatures below water’s normal freezing point. The effect depends on concentration: too little dissolved salt may provide limited melting, while performance also changes with temperature. Engineers therefore evaluate the expected cold conditions rather than treating all applications as equally effective.
Calcium chloride adds a second mechanism to freezing-point depression: it releases heat as it dissolves. That heat can matter when initial melting is needed, but it does not eliminate the importance of temperature, concentration, or pavement conditions. Comparing it with sodium chloride or magnesium chloride therefore requires considering both the brine-forming effect and the conditions under which the material is applied.
Pavement conditions influence whether chemical action translates into improved mobility. A surface with different moisture or temperature conditions can change how quickly brine forms and how well it supports ice removal. Application rate also matters because the amount of salt affects concentration. Engineers must therefore judge performance in relation to the actual roadway, bridge, runway, or walkway conditions.
Selecting an application rate requires matching the salt choice and amount to expected temperature, concentration, and pavement conditions. The objective is not simply to apply more material but to obtain adequate ice removal and traction while limiting avoidable effects on infrastructure. Engineers use this balance to guide treatment decisions for roads, bridges, runways, and walkways.
On engineered structures, chloride exposure can create tradeoffs between winter safety and material durability. The overview identifies corrosion risks for steel and damage to concrete as important consequences of salt management. These effects matter especially on roads and bridges, where de-icing decisions must account for both immediate mobility and the condition of infrastructure.
Environmental management is part of salt selection because chloride can affect soil and water in addition to infrastructure. The appropriate choice therefore depends on more than melting performance. Engineers must balance the safety and mobility benefits of treatment against these impacts, making decisions that consider where and how salts are applied rather than merely whether they can remove ice.