Lenntech Water Treatment

13 products found

Products

  • Water Treatment Chemicals

  • Lenntech - Algaecide Water Treatment Chemicals

    Lenntech - Algaecide Water Treatment Chemicals

    Algaecides are chemicals that kill algae and blue or green algae, when they are added to water. Examples are copper sulphate, iron salts, rosin amine salts and benzalkonium chloride. Algaecides are effective against algae, but are not very usable for algal blooms for environmental reasons. The problem with most algaecides is that they kill all present algae, but they do not remove the toxins that are released by the algae prior to death.

  • Lenntech - Antifoams for Water Treatment Chemicals

    Lenntech - Antifoams for Water Treatment Chemicals

    Foam is a mass of bubbles created when certain types of gas are dispersed into a liquid. Strong films of liquid than surround the bubbles, forming large volumes of non-productive foam. The cause of foam is a complicated study in physical chemistry, but we already know that its existence presents serious problems in both the operation of industrial processes and the quality of finished products. When it is not held under control, foam can reduce the...

  • Lenntech - Boiler Water Chemicals

    Lenntech - Boiler Water Chemicals

    Boiler water chemicals include all chemicals that are used for the following applications: Oxygen scavenging; Scale inhibition; Corrosion inhibition; Antifoaming; Alkalinity control.

  • Coagulants for Water Treatment Chemicals

    Coagulants for Water Treatment Chemicals

    When referring to coagulants, positive ions with high valence are preferred. Generally aluminium and iron are applied, aluminium as Al2(SO4)3- (aluin) and iron as either FeCl3 or Fe2(SO4)3-. One can also apply the relatively cheap form FeSO4, on condition that it will be oxidised to Fe3+ during aeration. Coagulation is very dependent on the doses of coagulants, the pH and colloid concentrations. To adjust pH levels Ca(OH)2 is applied as co-flocculent....

  • Lenntech - Corrosion Inhibitors for Water Treatment Chemicals

    Lenntech - Corrosion Inhibitors for Water Treatment Chemicals

    Corrosion is a general term that indicates the conversion of a metal into a soluble compound. Corrosion can lead to failure of critical parts of boiler systems, deposition of corrosion products in critical heat exchange areas, and overall efficiency loss. That is why corrosion inhibitors are often applied. Inhibitors are chemicals that react with a metallic surface, giving the surface a certain level of protection. Inhibitors often work by adsorbing...

  • Lenntech - Solids Polymer Flocculants for Water Treatment Chemicals

    Lenntech - Solids Polymer Flocculants for Water Treatment Chemicals

    To promote the formation of flocs in water that contains suspended solids polymer flocculants (polyelectrolytes) are applied to promote bonds formation between particles. These polymers have a very specific effect, dependent upon their charges, their molar weight and their molecular degree of ramification. The polymers are water-soluble and their molar weight varies between 105 and 106 g/ mol. There can be several charges on one flocculent. There are...

  • Lenntech - Neutralizing Agents - Alkalinity Control

    Lenntech - Neutralizing Agents - Alkalinity Control

    In order to neutralize acids and basics we use either sodium hydroxide solution (NaOH), calcium carbonate or lime suspension (Ca(OH)2) to increase pH levels. We use diluted sulphuric acid (H2SO4) or diluted hydrochloric acid (HCl) to decline pH levels. The dose of neutralizing agents depends upon the pH of the water in a reaction basin. Neutralization reactions cause a rise in temperature.

  • Lenntech - Oxidants for Water Treatment Chemicals

    Lenntech - Oxidants for Water Treatment Chemicals

    Chemical oxidation processes use (chemical) oxidants to reduce COD/BOD levels, and to remove both organic and oxidisable inorganic components. The processes can completely oxidise organic materials to carbon dioxide and water, although it is often not necessary to operate the processes to this level of treatment.

  • Lenntech - Oxygen Scavengers for Water Treatment Chemicals

    Lenntech - Oxygen Scavengers for Water Treatment Chemicals

    Oxygen scavenging means preventing oxygen from introducing oxidation reactions. Most of the naturally occurring organics have a slightly negative charge. Due to that they can absorb oxygen molecules, because these carry a slightly positive charge, to prevent oxidation reactions from taking place in water and other liquids. Oxygen scavengers include both volatile products, such as hydrazine (N2H4) or other organic products like carbohydrazine,...

  • Lenntech - pH Conditioners for Water Treatment Chemicals

    Lenntech - pH Conditioners for Water Treatment Chemicals

    Municipal water is often pH-adjusted, in order to prevent corrosion from pipes and to prevent dissolution of lead into water supplies. During water treatment pH adjustments may also be required. The pH is brought up or down through addition of basics or acids. An example of lowering the pH is the addition of hydrogen chloride, in case of a basic liquid. An example of bringing up the pH is the addition of natrium hydroxide, in case of an acidic liquid....

  • Lenntech - Resin Cleaners for Water Treatment Chemicals

    Lenntech - Resin Cleaners for Water Treatment Chemicals

    Ion exchange resins need to be regenerated after application, after that, they can be reused. But every time the ion exchangers are used serious fouling takes place. The contaminants that enter the resins will not be removed through regeneration; therefore resins need cleaning with certain chemicals. Chemicals that are used are for instance sodium chloride, potassium chloride, citric acid and chlorine dioxide. Chlorine dioxide cleansing serves the...

  • Lenntech - Scale Inhibitors for Water Treatment Chemicals

    Lenntech - Scale Inhibitors for Water Treatment Chemicals

    Scale is the precipitate that forms on surfaces in contact with water as a result of the precipitation of normally soluble solids that become insoluble as temperature increases. Some examples of scale are calcium carbonate, calcium sulphate, and calcium silicate. Scale inhibitors are surface-active negatively charged polymers. As minerals exceed their solubility's and begin to merge, the polymers become attached. The structure for crystallisation is...