1、Advances and challenges in humic acid production technologies from

Humic acids (HAs) play a crucial role in enhancing agro-environmental sustainability by acting as synergistic intermediaries between soil, water, fertilizers, microbiomes, and plant nutrition.

2、What Are the Humic Acid Colloidal Suspension Technologies?

Humic acid colloidal suspension technology is grounded in the unique properties of humic acid, a natural organic macromolecule rich in functional groups and high specific surface area.

3、Humic Acid with Vertical Adsorption Conformation Enhanced the Transport

Humic acid (HA) enhances colloidal transport in porous media, yet the mechanisms by which the HA adsorption conformation affects colloid transport remain unclear.

4、Fabrication, Microstructure and Colloidal Stability of Humic Acids

This type of material utilizes immobilized humic acids for any application, including removing contaminants from water and/or other solvents and medical uses, while avoiding humic acid loss by solubilization.

5、Characteristics of Humic Acid–Iron Colloid Stability and

Humic acid (HA), as a major component of dissolved organic matter (DOM), contains various reactive functional groups such as hydroxyl, carboxyl, and phenolic hydroxyl groups, which can regulate the migration and transformation of pollutants through metal ion binding (Yao et al. 2020).

Environmental colloid behaviors of humic acid

Humic acid (HA), a principal constituent of natural organic matter (NOM), manifests ubiquitously across diverse ecosystems and can significantly influence the environmental behaviors of Cd (II) in aquatic systems.

Deposition and release of humic acid colloids in saturated porous media

Humic acid (HA), a critical component of soil organic colloids and a key player in the carbon cycle, exhibits complex transport behaviors in porous media under varying chemical and hydrodynamic conditions.

Molecular Mechanisms of Humic Acid in Inhibiting Silica Scaling during

Herein, the effects of humic acid (HA) on silica scaling behavior during MD are systematically investigated. The interaction mechanism between typical components of HA and active silica was evaluated by molecular dynamics simulations.

Humic Acid

Collectively referred to as Humic Acid, these substances increase the bioavailability of nutrients released from soil minerals through complex interactions among microbes, metals, organic matter and clays.

Humic Substances: Bridging Ecology and Agriculture for a Greener

Humic substances (HSs) are emerging as multifunctional natural catalysts in sustainable agriculture, offering novel opportunities to enhance soil health, plant productivity, and environmental resilience.

Humic acid colloidal suspension technology is a novel water treatment approach primarily applied in industrial wastewater and municipal sewage treatment. By leveraging the adsorption, flocculation, and precipitation properties of humic acid, this technology transforms pollutants in wastewater into easily removable forms, thereby achieving water purification. Below is a detailed overview of humic acid colloidal suspension technology:

I. Principle of Humic Acid Colloidal Suspension Technology

Humic acid colloidal suspension technology is grounded in the unique properties of humic acid, a natural organic macromolecule rich in functional groups and high specific surface area. It effectively adsorbs heavy metal ions, organic compounds, and color-causing substances from water, forming stable colloidal particles. By adjusting parameters such as pH, stirring speed, and dosage, the formation and stability of these colloidal particles can be controlled, enabling efficient pollutant removal from wastewater.

II. Classification of Humic Acid Colloidal Suspension Technologies

1. Direct Coagulation Method: This approach involves adding humic acid together with flocculants (e.g., polyaluminum chloride, polyacrylamide) directly into the wastewater. Through agitation, humic acid interacts with pollutants to form colloidal particles, which are subsequently removed via sedimentation or flotation. While simple to operate, this method requires careful selection of flocculants and dosing strategies to optimize effectiveness.

2. Flocculation Precipitation Method: Building on direct coagulation, this method fine-tunes parameters like pH and stirring speed to enhance the stability of colloidal particles. Pollutants are then separated through sedimentation tanks, making it suitable for wastewater containing high levels of suspended solids or fine particles.

3. Flotation Method: By adjusting the pH of wastewater, humic acid forms hydrophobic colloidal particles with pollutants. These particles are then separated using flotation equipment, ideal for treating wastewater with abundant floatable contaminants.

4. Biodegradation Method: This technique utilizes microorganisms to break down humic acid and convert recalcitrant organic pollutants into harmless substances. It is particularly effective for wastewater containing complex or hard-to-degrade organic matter.

III. Applications of Humic Acid Colloidal Suspension Technology

1. Industrial Wastewater Treatment: Industrial processes often generate wastewater containing heavy metals, organics, and colorants. Humic acid colloidal suspension technology transforms these pollutants into removable forms, reducing downstream treatment costs and complexity.

2. Municipal Sewage Treatment: Household sewage frequently contains nitrogen, phosphorus, and other nutrients. This technology efficiently removes such nutrients, mitigating risks of eutrophication in water bodies.

3. Agricultural Non-Point Source Pollution Control: In agriculture, fertilizers and pesticides pose soil and groundwater contamination risks. By applying humic acid colloidal suspension technology, these pollutants can be converted into less harmful forms, lowering environmental hazards.

IV. Development Trends of Humic Acid Colloidal Suspension Technology

With growing environmental awareness and technological advancements, humic acid colloidal suspension technology is gaining traction in water treatment. Future development will prioritize efficiency, energy savings, and eco-friendliness. For example:

• Process Optimization: Improving equipment performance and energy efficiency to enhance treatment stability and effectiveness.
• Innovative Materials: Developing green flocculants and exploring biodegradation pathways to target recalcitrant organics.

This technology holds promise for advancing sustainable water management and pollution control.

Note: Technical terms (e.g., "腐殖酸" as "humic acid") and industry-specific expressions are translated to align with international standards in environmental engineering.