Ads
related to: humic acid and lignite food examples
Search results
Results From The WOW.Com Content Network
Extracted humic acid not a single acid; rather, it is a complex mixture of many different acids containing carboxyl and phenolate groups so that the mixture behaves functionally as a dibasic acid or, occasionally, as a tribasic acid. Commercial humic acid used to amend soil is manufactured using these same well established procedures.
It is reducible to a fine powder by trituration, and if submitted to the action of a weak solution of potash, it yields a considerable quantity of humic acid. [39] Leonardite is an oxidized form of lignite, which also contains high levels of humic acid. [58] Jet is a hardened, gem-like form of lignite used in various types of jewelry. [42]
The thickness of the predominantly finely layered to flaky lignite is around 30 to 80 m, but can reach over 120 m in places. [7] In general, the Geiseltal lignite is divided into four main seams, the Lower Coal, Middle Coal (differentiated into Lower and Upper Middle Coal) and Upper Coal, but also has a local Basiskohle in the northern Geiseltal.
The phenolic unit can be found dimerized or further polymerized, creating a new class of polyphenol. For example, ellagic acid is a dimer of gallic acid and forms the class of ellagitannins, or a catechin and a gallocatechin can combine to form the red compound theaflavin, a process that also results in the large class of brown thearubigins in tea.
It is an oxidation product of lignite, associated with near-surface mining. [1] It is a rich source of humic acid (up to 90%) [2] and is used as a soil conditioner, as a stabilizer for ion-exchange resins in water treatment, [3] in the remediation of polluted environments and as a drilling additive. [4]
Fulvic acid is the genus that contains the matter that has the lowest molecular weight, is soluble in acids and alkalis, and is susceptible to microbial action. Humic acid is the genus that contains the intermediate matter that has medial molecular weight, is soluble in alkalis and insoluble in acids, and has some resistance to microbial action.
Chelating agents and humic acid have been shown to increase nutrient uptake. [ 84 ] [ 71 ] Additionally, plant growth promoting rhizobacteria (PGPR), which are regularly utilized in field and greenhouse agriculture, have been shown to benefit hydroponic plant growth development and nutrient acquisition. [ 85 ]
Processed organic fertilizers include compost, liquid plant manures, humic acid, grain meal, amino acids, and seaweed extracts. Other examples are natural enzyme-digested proteins. Decomposing crop residue (green manure) from prior years is another source of fertility.