The Difference Between Sodium Humate And Humic Acid

What is the difference between humic acid and sodium humate? Sodium humate is made of low-grade coal containing humic acid as raw material, extracted with caustic soda solution, then precipitated to remove the debris, concentrated and dried to form a bright black powder crystal. Sodium humate is widely used, and in recent years, many companies have conducted research and development on sodium humate, so that it is also widely used in the field of aquaculture. Humic acid exists in large quantities in peat, young lignite and weathered coal (called primary humic acid). Humic acid can also be obtained from coal without humic acid by artificial oxidation. This humic acid obtained from coal without humic acid by artificial oxidation is called regenerated humic acid. In addition, synthetic humic acid can also be prepared by using polyphenols, sugars and other substances. Humic acid is insoluble in water. It is also a complex and adsorbent of trace metal elements, affecting the toxicity and bioavailability of metal ions. Sodium humate is a kind of water conditioning product commonly used in aquaculture, its black crystal, shining with beautiful luster of no qualitative particles. Non-toxic, odorless, non-corrosive, extremely easy to water. A 10% aqueous solution has a PH of 8-9. Humic acid is a complex polymer aromatic hydroxy-carboxylic acid. Its molecular structure contains oxygen-containing active groups, such as carboxyl group and phenolic hydroxyl group, and also contains azazine rings, such as pyridine, indole, pyrrole, etc., so it has ion exchange properties and the ability to form chelates with metal ions. Humic acid is a hydrophilic reversible colloid that can be condensed or gelatinized. Humic acid has a large inner surface and strong adsorption capacity. In addition, humic acid also exists quinone group and semi-quinone group, which has a certain REDOX ability. Therefore, humic acid has a great role in the treatment of aquaculture water. Different humic acid products have different adsorption capacity. For humic acid itself, the adsorption capacity of humic acid obtained by artificial oxidation is greater than that of natural humic acid. It has been found that in artificially oxidized humic acid, nitro humic acid has better ion exchange performance, while the chelating ability of humic acid obtained by oxygen oxidation is stronger, and the adsorption performance of alkali metal and alkaline earth metal salt of humic acid is better than that of humic acid. However, there are hydrogen bonds between humic acid molecules, which is small in water swelling, and H+ is generated after ion exchange, which changes the pH of the solution, and the above shortcomings can be overcome after the humic acid is turned into salts. Sodium humate is the product obtained by treating humic acid with NaCl and NaOH solution or saline solution of other alkali metals and alkaline earth metals. Sodium humate can change about 20% of -COOH in humic acid into -COONa, which improves the exchange rate and the exchange capacity of ions. Therefore, sodium humate is generally used in aquaculture and humic acid is rarely used.