Laboratory Water Treatment Equipment

Laboratory water treatment equipment is used to treat tap water or other water sources into water that meets the requirements of various laboratory experiments. The following are common types of laboratory water treatment equipment:

Pretreatment Equipment

1. Multi-Media Filter

• Principle: By filling various filter media (such as quartz sand and activated carbon), it utilizes the pore size of the filter media and surface adsorption to remove large-particle impurities in water (e.g., suspended solids, sediment, rust) and reduce water turbidity.
• Function: Protect subsequent treatment equipment, prevent large-particle impurities from entering devices like reverse osmosis (RO) membranes and ion exchange resins (which could cause clogging or contamination), and extend the service life of equipment.

2. Activated Carbon Filter

• Principle: It uses the large specific surface area and adsorption capacity of activated carbon to adsorb impurities in water, such as organic matter, residual chlorine, abnormal colors, and odors. The microporous structure on the surface of activated carbon can adsorb pollutants with suitable molecular sizes, thereby achieving water purification.
• Function: Remove residual chlorine in water to prevent oxidative damage to subsequent treatment equipment (e.g., RO membranes) caused by residual chlorine; meanwhile, remove organic matter and other impurities to improve water purity and enhance water taste and odor.

3. Water Softener

• Principle: It generally adopts the ion exchange resin softening method. Sodium ions (Na⁺) on the resin undergo an exchange reaction with hardness ions in water (e.g., calcium [Ca²⁺], magnesium [Mg²⁺]) to remove the hardness ions and soften the water. When the resin becomes saturated with adsorbed hardness ions, it is regenerated with brine to restore its exchange capacity.
• Function: Reduce water hardness, prevent scale formation from calcium, magnesium, and other ions in subsequent treatment equipment or laboratory instruments, which could affect the normal operation of equipment and the accuracy of experimental results.

Reverse Osmosis (RO) Equipment

RO Pure Water Machine

• Principle: Under pressure, water is forced through a semipermeable membrane, while impurities in water (e.g., salts, organic matter, bacteria) are retained. This achieves the purpose of desalination and removing other impurities. The semipermeable membrane only allows water molecules to pass through while blocking other substances, realizing water purification and separation.
• Function: Effectively remove most ions, organic matter, bacteria, and other impurities in water to produce high-purity pure water. It is used as regular laboratory water or as feed water for further ultrapure water preparation.

Ion Exchange Equipment

Ion Exchange Column

• Principle: It uses ion exchange resins to undergo exchange reactions with ions in water, removing various ionic impurities. According to the type of resin, it can be divided into cation exchange resins (for removing cations in water) and anion exchange resins (for removing anions in water).
• Function: Further reduce the ion content in water, improve water purity, and produce deionized water that meets laboratory requirements. It is often used in experiments with high requirements for water ion concentration, such as chemical analysis and instrumental analysis.

Precision Treatment Equipment

1. Ultrafiltration (UF) Device

• Principle: It adopts ultrafiltration membrane filtration technology, with pressure as the driving force. It retains impurities in water (e.g., macromolecular organic matter, colloids, bacteria, viruses) while allowing water molecules and small-molecule substances to pass through the ultrafiltration membrane, realizing water purification and separation.
• Function: Remove macromolecular organic matter, bacteria, and other impurities in water to improve the biological purity of water. It is commonly used in experiments sensitive to microorganisms and macromolecular impurities, such as cell culture and biopharmaceuticals.

2. Ultraviolet (UV) Sterilizer

• Principle: It uses the bactericidal effect of ultraviolet light to destroy the DNA structure of microorganisms in water (e.g., bacteria, viruses), making them lose the ability to reproduce and survive, thereby achieving sterilization and disinfection.
• Function: Kill microorganisms such as bacteria and viruses in water, prevent microbial growth and reproduction in water, and ensure that the microbial indicators of laboratory water meet requirements. It is often used in experiments with strict requirements for microbial content.

3. Microporous Filter

• Principle: It filters water through a filter membrane with tiny pores, retaining tiny particles, bacteria, and other impurities in water to achieve precision filtration of water.
• Function: Further remove tiny particles, bacteria, and other impurities in water, improve water clarity and purity. It is commonly used in experiments with extremely high water quality requirements, such as electron microscope observation and high-performance liquid chromatography (HPLC) analysis.