Overview
Flake humic acid is a concentrated form of humic substances extracted from leonardite, peat, or other organic deposits. It represents a vital component of soil organic matter and plays crucial roles in agricultural and environmental applications. Unlike powdered humic acid, the flake form offers easier handling and slower dissolution rates, making it preferred for certain industrial applications. The material's quality depends on its source, with leonardite-derived products generally containing higher active humic acid percentages.
Physical and Chemical Properties
Flake humic acid exhibits unique colloidal properties with a large surface area and numerous functional groups (carboxyl, phenolic, and hydroxyl). These characteristics give it exceptional cation exchange capacity (CEC) of 300-500 meq/100g. The material's dark color comes from complex aromatic structures with molecular weights ranging from a few hundred to several thousand Daltons. Its solubility depends on pH, becoming more soluble in alkaline conditions (pH >7) due to the ionization of acidic functional groups.
Main Applications
In agriculture, flake humic acid serves as a soil conditioner that improves nutrient availability, water retention, and microbial activity. It's commonly blended with fertilizers or applied directly to poor soils. Industrial uses include wastewater treatment (heavy metal removal), drilling fluid additive, and animal feed supplement. The flake form is particularly valued in slow-release applications where gradual dissolution is desired. Environmental remediation projects utilize its metal chelation properties for contaminated soil treatment.
Safety and Storage
While non-toxic, flake humic acid requires standard chemical handling precautions due to its dust potential. Store in moisture-proof containers away from strong oxidizers to prevent degradation. Proper ventilation is recommended during bulk handling to minimize dust exposure. The material is stable under normal conditions but may gradually lose efficacy if exposed to excessive heat or moisture over extended periods.
B2B Procurement Guide
When sourcing flake humic acid, prioritize suppliers who provide comprehensive analysis certificates including humic/fulvic acid percentages, moisture content, and heavy metal analysis. Consider the application-specific requirements: agricultural grades typically need 60-70% humic acid, while industrial applications may require higher purity. Bulk shipments should be inspected for moisture damage, as wet material may clump and lose efficacy. For large orders, request batch testing to ensure consistency.
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