1、Potentially toxic elements in different inorganic and organic

Although fertilizer use greatly enhances the crop productivity, applying it excessively can lead to serious concern of agricultural soil contamination and global food safety.

2、Heavy metals concentrations in commercial organic fertilizers and the

Inductively coupled plasma mass spectrometry (ICP-MS) was used to detect heavy metals in 74 typical and representative commercial organic fertilizers (COFs) collected in major COF production...

3、Heavy Metals and Pesticides Toxicity in Agricultural Soil and Plants

Fertilizers, including organic and inorganic elements, are responsible for producing heavy metals in the soil. According to the region, Table 2 presents a comparison between the worldwide and European Union (EU), and how heavy metals in different types of fertilizers are varying.

4、Determination of macro and micro nutrients in fertilizers

While most fertilizers are applied directly to the soil, some can be sprayed on leaves. The classification of fertilizers as organic or inorganic, depends on the source of the raw materials rather than any differences in the nutrient content.

5、Agriculture Nutrient Management and Fertilizer

EPA is examining whether some fertilizers or soil conditioners contain potentially harmful containment levels. However, the Agency believes that some wastes can be used beneficially in fertilizers when properly manufactured and applied.

Managing The Hazards of Fertilizer

Fertilizers are vital to modern agriculture, enhancing plant growth and improving crop yields. However, handling and storing these materials can generate dust particles with significant risks to human health and the environment.

Environmental risks of trace elements associated with long

In this article, we reviewed trace elements in phosphate fertilizers, receiving soils, and harvested crops, focusing on three notorious elements As, Cd and Pb, and assessed the risks based on outcomes of mathematical modeling.

Is Straight Fertilizer Considered A Hazardous Material

The classification of fertilizers as hazardous materials is determined by their composition and associated risks. Some fertilizers are benign, while others, particularly those high in nitrogen, phosphorus, or potassium, may pose hazards.

Review of Rare Earth Elements as Fertilizers and Feed

Rare earth elements (REEs) are key constituents of modern technology and play important roles in various chemical and industrial applications. They also are increasingly used in agricultural and zootechnical applications, such as fertilizers and feed additives.

Do New

Phosphorus (P)-rich secondary raw materials can provide a valuable base for modern mineral fertilizers, provided that the new formulations do not load the soil–plant system with potentially toxic elements.

Macro-element fertilizers, typically referring to those containing the three primary nutritional elements—nitrogen (N), phosphorus (P), and potassium (K)—are essential for plant growth and critical to agricultural production. while they are not classified as hazardous materials in the traditional sense, they may pose environmental and health risks under specific conditions. Below is a detailed analysis of macro-element fertilizers:

1. Physical Properties

• Appearance: Macro-element fertilizers usually appear as powders or granules, with colors varying based on their composition. For example, urea is white crystalline powder, ammonium chloride forms white rhombic crystals, and potassium nitrate exists as white granules.
• Packaging: To ensure safety during transport and storage, fertilizers are often packed in sturdy containers or bags. These materials are designed to withstand pressure and impact, preventing leaks or damage during handling.

2. Chemical Properties

• Stability: Under normal temperature and pressure, macro-element fertilizers are generally stable and unlikely to react with other substances. They do not decompose or degrade when exposed to air, moisture, or chemicals.
• pH Reactions: While the fertilizers themselves are neutral, they may produce acidic or alkaline substances when reacting with water. For instance, ammonium bicarbonate (NH₄HCO₃) releases ammonia gas, carbon dioxide, and heat upon contact with water.

3. Environmental Impact

• Soil Pollution: Excessive or improper use of macro-element fertilizers can contaminate soil. Overapplication of nitrogen may lead to overly rapid plant growth, lodging, or death, while excessive phosphorus can cause water eutrophication.
• Water Pollution: Nitrogen and phosphorus from fertilizers can enter water bodies via surface runoff or groundwater leaching, leading to eutrophication. This harms aquatic ecosystems and may transfer harmful substances to humans through the food chain.

4. Human Health Effects

• Direct Contact: Farmers frequently handle macro-element fertilizers, risking skin irritation or respiratory issues from prolonged exposure to high concentrations of nitrogen or phosphorus compounds.
• Indirect Exposure: Livestock consuming contaminated feed may pass harmful substances up the food chain to humans. Improper disposal of fertilizers can also damage aquatic ecosystems, indirectly affecting human health.

5. Safety Management

• Safe Usage: Follow safety protocols, such as wearing protective gear and avoiding dust inhalation. Optimize fertilization rates and timing to minimize environmental harm.
• Waste Disposal: Dispose of unused fertilizers properly, e.g., recycling them into organic fertilizers or reusing them as raw materials. This reduces pollution and promotes resource circulation.

6. Regulatory Standards

• National Standards: China has established national standards governing the production and use of macro-element fertilizers, covering product quality, technical requirements, and safety guidelines.
• Industry Norms: Many regions supplement national standards with local regulations tailored to specific environmental and agricultural needs.

Macro-element fertilizers are not inherently hazardous but require careful management due to their environmental and health implications. Adhering to safety protocols, proper usage, and regulatory compliance ensures their safe application in agriculture.