The role of sodium humate in aquaculture, how to know true and false sodium humate (HA-Na)!

First, the basic understanding of sodium humate

a, product English name Sodium humate
b, product alias: sodium humate; sodium humate (Humin sodium salt); humic acid sodium salt;

  1. How is sodium humate produced?

In China, agricultural use as an organic ecological fertilizer is based on weathering low-efficiency lignite, whitened low calorific value peat and smoky brown coal. After special pulverization, it is made by bio-fermentation technology and then processed by high-temperature polymerization. A macromolecular organic weak sodium salt having various functions.

Its structure is relatively complicated. It is known that humic acid molecules contain benzene rings, fused rings and some heterocyclic rings (such as pyrrole, furan, anthracene, etc.), and each aromatic ring has a bridge bond and various functions on the aromatic ring. The group is mainly a carboxyl group, a phenol group, a hydroxyl group, a methoxy group, a thiol group or the like. The content of humic acid dry base in sodium humate is more than 75%, which was originally produced as a farm animal companion. It is a good veterinary drug and feed additive for the production of green milk and egg food.

Third, the physical properties and chemical composition of sodium humate

  1. Appearance: black and bright, amorphous solid particles
    2, particle size: 20—120 mesh
  2. Water-soluble humic acid content (dry basis) ≥70%
    4, water insoluble matter (dry basis) ≤ 12%
    5, moisture content ≤ 15%
    6, Fe content ≤0.45%
    7, PH value 8.0-9.0

Fourth, the identification of sodium humate

High-quality (HA-Na) is black and black, bright, and irregular, irregular particles with bright luster. It is non-toxic, odorless, non-corrosive, extremely watery, and free of any deposits. The highest quality products are made of high quality low calcium and low magnesium weathered lignite containing natural humic acid. The bituminous coal is chemically refined. It is a multifunctional polymer compound containing more active groups such as hydroxyl, sulfhydryl and carboxyl groups. It has a large internal surface area and strong adsorption, exchange, complexation and chelation ability. China’s largest production base of sodium humate is in Baotou. As a synergist in aquaculture, the fertilizer and shading properties of sodium humate are widely used. Both have achieved significant economic benefits.

V. Industrial production process of sodium humate

The humic acid in the weathered coal is extracted with a certain proportion of sodium hydroxide solution, separated from the residue, concentrated, and dried to obtain a solid sodium humate finished product. The specific process is as follows: the weathered coal is first subjected to wet ball milling to obtain coal slurry with a particle size of less than 20 mesh, put into the batching tank, add the calculated amount of caustic soda, control the pH to 11, and mix the liquid to solid ratio of 9:1. The extraction tank and the jacket are heated by steam to raise the temperature inside the tank to 85-90 ° C, stir the reaction for 0.5 h, discharge into the sedimentation tank to separate the solid and liquid, transfer the upper supernatant to the evaporator and concentrate to 10Be, and pump it to spray drying. The tower is dry.

Tablets made of sodium humate:

Take appropriate amount of sodium humate (containing humic acid 200g), grind into fine powder, add 8% starch slurry, mix well, make granules, dry, add appropriate amount of talcum powder, press into 1000 pieces / kg, that is. The product is black and shiny with irregular flaky shape; the entrance is sweet and sturdy, you can try it.

Six, true and false humic acid identification method

Take the so-called sodium humate, the finished product, 2 pieces or a few tablets, grind the powder with a tool, add 50 ml of pure water, stir to dissolve, and test according to the following method:

(1) Take 10ml of the solution, add 1ml of dilute hydrochloric acid to make the precipitate, filter it, filter the droplets and add the ammonia test solution to adjust the pH to neutral.
It is evaporated to dryness on a water bath, dissolved in 3 ml of water to dissolve, and the chromatographic reaction chromatogram of the metal sodium salt is authentic.
(2) Another 10 ml of the solution is taken, and an appropriate amount of dilute hydrochloric acid is added to form a brown-black precipitate, and an excess of sodium hydroxide test solution is added.
The precipitate is dissolved, and then diluted with hydrochloric acid to make it acidic, and the precipitate is regenerated to form a black precipitate.

Routine inspection

The time limit for disintegration of sodium humate into water should be 30 minutes for disintegration, all dissolved in water, and no precipitate layer.

The role and application of sodium humate in aquaculture

1) The humic acid molecule is rich in nitrogen and has a strong absorption effect on the amino group. It can decompose the excrement of the bottom cultured animal in the aquaculture water, and the residual bait and organic floc, which reduces the metabolism of feces. The odor is also increased by the absorption of ammonia gas.

2) Antibacterial and anti-inflammatory effects of water in sodium humate

  1. Humic acid can promote corticosteroids and increase the capillary permeability caused by amines by activating the pituitary-adrenal system.
  2. Sodium humate is a polymer complex and contains alkaloids, so it has strong adsorption capacity for intestinal inflammatory substances and toxic substances, and has astringent effect on intestinal mucosa of cultured animals to prevent gastroenteritis.
  3. Under the action of various enzymes, the active group in the sodium humate molecule can decompose more nascent oxygen and exhibit bactericidal action.
  4. Antiviral effect of sodium humate
    Unlike humic acid, sodium humate is not only non-toxic but also detoxifying. It has detoxification effects on heavy metals and strychnine, and can reduce the toxicity of chemical fertilizers in water.
  5. It can be used as an opacifier for controlling the growth of moss and a water purifying agent for flocculation of organic molecules.
    Eight, the market of humic acid fraud
  6. Using fly ash, talcum powder, charcoal black falsification method, powdery form, after water precipitation, there are a large number of sedimentation layers. The application in the Tangkou caused the submerged plants to hang dirty, causing severely causing the eucalyptus, and the kelp wilted.