Topic
Humic acid
About: Humic acid is a research topic. Over the lifetime, 13030 publications have been published within this topic receiving 330804 citations. The topic is also known as: humic acids & humin acids.
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Patent•
25 Nov 2015
TL;DR: In this article, a special humic acid water-soluble fertilizer for the horseradish trees has been proposed, which has the advantages of being obvious in fertilizer efficiency, convenient to use, comprehensive in nutrition, high in utilization rate, capable of effectively increasing the fresh and tender degree of the tree branches and the like.
Abstract: The invention discloses special humic acid water-soluble fertilizer for horseradish trees, and aims at solving the problem that the needs of the horseradish trees for multiple nutritional ingredients cannot be met through traditional compound fertilizer. The special humic acid water-soluble fertilizer for the horseradish trees has the advantages of being obvious in fertilizer efficiency, convenient to use, comprehensive in nutrition, high in utilization rate, capable of effectively increasing the fresh and tender degree of horseradish tree branches and the like.
2 citations
TL;DR: In this paper, quantitative and qualitative changes in humic acids of meadow soddy soils, occurring under the action of various fertilizer systems, were studied by 13C and 31P NMR.
Abstract: Quantitative and qualitative changes in humic acids of meadow soddy soils, occurring under the action of various fertilizer systems, were studied by 13C and 31P NMR.
2 citations
Patent•
10 Dec 2003
TL;DR: In this paper, a high-effective drought-resisting fertilizer and its preparation process is described, which is made up by mixing fulvic acid extracted from danty, cupric sulfate, ferrous sulfate and zinc sulfate according to a certain proportion.
Abstract: The present invention relates to a high-effective drought-resisting fertilizer and its preparation process. It is made up by mixing fulvic acid extracted from danty, cupric sulfate, ferrous sulfate, manganese sulfate and zinc sulfate according to a certain proportion, and is characterized by that in the process of extracting fulvic acid firstly, a certain quantity of concentrated nitric acid is added so as to make the ulmic acid and humic acid be converted into the fulvic acid to raise extracting rate of fulvic acid. Its main preparation process includes the steps of extracting fulvic acid and adding trace elements. Besides, it also provides application method.
2 citations
TL;DR: Ceramic membrane ultrafiltration experiments were performed with 7-channel tubular membrane (molecular weight cutoff = 300 kD) at constant transmembrane pressure and crossflow rate under recirculation mode as mentioned in this paper.
Abstract: Ceramic membrane ultrafiltration experiments were performed with 7-channel tubular membrane (molecular weight cutoff = 300 kD) at a constant transmembrane pressure and crossflow rate under recirculation mode In the experiments, the fouling characteristics of river water (RW, dissolved organic carbon (DOC) = 34 mg/L) were compared with humic acid solution (HA1, DOC = 37 mg/L) Also, the fouling behaviors of secondary effluent (SE, DOC = 79 mg/L) were compared with HA2 (DOC = 85 mg/L) Fluorescence excitation-emission matrix, modified Hermia’s model, and resistance-in-series model were used to analyze the fouling characteristics Results demonstrated that RW and SE could cause ceramic membrane fouling more rapidly due to their hydrophilic organic compositions in comparison with hydrophobic HA
2 citations
Patent•
07 May 2004
TL;DR: In this paper, a method for manufacturing a magnetized humic acid colloidal micelle and the use thereof is provided, thereby improving microorganism cultivation efficiency in waste water treatment, deodorization process, and domestic animal drinking water treatment.
Abstract: PURPOSE: A method for manufacturing a pellet of magnetized humic acid colloidal micelle and the use thereof are provided, thereby improving microorganism cultivation efficiency in waste water treatment, deodorization process, and domestic animal drinking water treatment CONSTITUTION: A method for manufacturing a pellet of magnetized humic acid colloidal micelle comprises the steps of: adding 5 to 15 wt% of FeO Fe2O3 or Fe3O4 powder, barium ferrite or strontium ferrite powder into oceanic humic acid colloidal micelle and mixing them; adding one or more minerals selected from rhyolite or dacite pumice stone, amphibole, olivine, biotite, rhyolite, phyllite, pegmatite, perlite, quartz porphyry, allophane volcanic ash soils into the oceanic humic acid colloidal micelle mixture and mixing them; maturing the mixture for 60 days or more; adding sodium alginate, chitosan resin, and cellulose resin as binders into the mixture and mixing them; forming a pellet or pill type oceanic humic acid colloidal micelle mixture; drying the pellet or pill of oceanic humic acid colloidal micelle for 4 to 5 days; drying the pellet or pill of oceanic humic acid colloidal micelle for 4 to 5 days with hot wind of 100 to 250 deg C; and treating the pellet or pill of oceanic humic acid colloidal micelle with magnetic flux density of 300G or more
2 citations