EN 13754:2009

Overview

EN 13754:2009 is the CEN standard that defines the characteristics, required tests and purity criteria for bentonite used in the treatment of water intended for human consumption. The standard describes physical and chemical properties, sampling and analysis methods, labelling, transportation and storage guidance, and provides informative background on origin and use. It supersedes EN 13754:2003 and aligns bentonite requirements with other product standards for drinking-water treatment.

Key Topics

• Scope and purpose: Applicable to bentonite formulations used to assist particle removal and flocculation in water treatment processes.
• Identification and composition: Common names include montmorillonite and bentonite. The standard lists typical oxide composition ranges (SiO2, Al2O3, MgO, CaO, Na2O) and limits for mass loss at 105 °C.
• Physical requirements:
  • Appearance: white to light brown or green powder.
  • Particle size: at least 95% by mass < 500 µm (manufacturer-declared distribution applies).
  • Packed bulk density: 800–1 000 kg/m3.
• Chemical requirements: Minimum purity requirements and limits for common impurities; manufacturers must notify users of significant additional impurities, by-products or additives.
• Test methods and standards referenced: Sampling and analysis procedures reference EN 12902 and EN 12485 for specific determinations (particle size, bulk density, SiO2, Al2O3, CaO, Na2O, MgO, water content).
• Safety and regulatory notes: Bentonite is not listed as a dangerous substance in the referenced EU classification directives and is not classified as dangerous for transport. Conformity with EN 13754:2009 does not by itself imply regulatory acceptance in all Member States; national rules may apply.

Applications

• Primary function: Bentonite is used as a floc weightening agent where suspended solids are low, improving coagulation/flocculation and subsequent removal by settling or filtration.
• Typical dosing: Dependent on raw water quality and plant configuration; generally up to 20 mg/l according to the informative annex.
• Forms and handling:
  • Supplied as powders in bags, big bags or bulk; packaging must be clean and compatible.
  • Storage: stable but hygroscopic; store dry and away from volatile/odorous materials and moisture.
  • Handling: avoid dust inhalation; rinse eyes/skin if contact occurs; sweep spills and discard.

Related Standards

• EN 12901:1999 – Definitions for inorganic supporting and filtering materials.
• EN 12902 – Methods of test for inorganic supporting and filtering materials (sampling, particle size, water content).
• EN 12485 – Test methods for calcium carbonate and related products; referenced for oxide analyses used in bentonite characterization.
• Council Directive 98/83/EC – Quality of water intended for human consumption (referenced for regulatory context).

By following EN 13754:2009, water treatment professionals can assess bentonite quality against defined physical and chemical criteria, apply consistent test methods and document safe handling, storage and labelling to support effective and compliant drinking-water treatment operations.