Abre num novo separador
Soluções inovadoras para a qualidade do ar

Notícias

Revisões do purificador de ar Philips

Revisões do purificador de ar Philips

Verifique os modelos de purificadores de ar Philips mais vendidos para que possa comparar as suas especificações, caraterísticas e desempenho e encontrar o purificador de ar philip ideal para o seu ...
2022-09-01
Purificador de ar, Notícias
Alen

5 Melhores avaliações do purificador de ar Alen Breathesmart HEPA

Atualmente, existem muitos fabricantes de purificadores de ar no mercado. Aqui, vamos apresentar a Alen, uma vez que é um produtor integral de purificadores de ar altamente ...
2022-08-16
Purificador de ar, Notícias
Classificação MERV do filtro de ar O que é e porque é importante

Classificação MERV do filtro de ar: O que é e porque é que é importante?

Os filtros de ar instalados nos aparelhos HVAC e nos purificadores de ar não têm a mesma qualidade e construção. Uma forma de analisar estes filtros é através da ...
2022-07-27
Notícias
4 melhores purificadores de ar para poeira que realmente funcionam

4 melhores purificadores de ar para poeira que realmente funcionam

É importante comprar um purificador de ar para respirar ar puro através da filtragem do ar. Estes aparelhos limpam o ar removendo o pó e outros poluentes, ...
2022-07-27
Purificador de ar, Notícias
Os 4 melhores purificadores de ar VOC eliminam os piores odores domésticos

4 melhores purificadores de ar VOC: Livrar-se dos piores odores domésticos

Com o melhor purificador de ar VOC, pode respirar mais facilmente, dormir melhor e relaxar num ambiente mais saudável. Os melhores purificadores de ar COV podem ...
2022-07-27
Purificador de ar, Notícias
4 melhores purificadores de ar para animais de estimação para se livrar dos odores de animais de estimação

Melhores purificadores de ar para animais de estimação para se livrar dos odores de animais de estimação

Aqui está o melhor purificador de ar para donos de animais: a melhor solução para um ar limpo e saudável que reduz as doenças. Apesar de gostarmos muito de ...
2022-07-21
Purificador de ar, Notícias
5 formas eficazes de eliminar naturalmente as alergias a gatos Livrar-se do cheiro a ervas daninhas: 5 formas comprovadas de tentar Como eliminar o formaldeído em casa: 5 métodos fáceis que funcionam

Como se livrar das dores de cabeça causadas por alergias: 5 tratamentos eficazes

As dores de cabeça provocadas por alergias são incómodas e persistentes. É por isso que é essencial obter alívio a longo prazo para se livrar das dores de cabeça causadas por alergias. Continue a ler e ...
2022-07-11
Notícias
Como se livrar do cheiro a cozinhado: 5 soluções inteligentes para experimentar

Como se livrar do cheiro a cozinhado: 5 soluções inteligentes para experimentar

Cooking is such a delight. But the mess, especially the smell, that comes after it is a little bit taxing to remove. Fortunately, there are ...
2022-07-11
Notícias
Como remover o formaldeído em casa: 5 métodos fáceis que funcionam

Como remover o formaldeído em casa: 5 métodos fáceis que funcionam

Formaldehyde is a type of volatile organic compound (VOC) that is commonly present in residential spaces. Unfortunately, exposure to them can be a bit harmful. ...
2022-07-09
Notícias
Decoração de parede moderna Como modernizar a sua parede

4 melhores purificadores de ar para animais de estimação que funcionam

You love your pet, but they make you sneeze. Find the best air purifier for pets and stop worrying about odors and allergens. Air purifiers ...
2022-07-08
Purificador de ar, Notícias
Como se livrar das alergias sazonais 5 melhores métodos de alívio (1)

Como se livrar das alergias sazonais: 5 melhores métodos de alívio

As alergias sazonais podem ser frustrantes e potencialmente perigosas. Embora não tenham cura, existem meios eficazes de as prevenir e tratar. Temos ...
2022-06-29
Notícias
Como tirar o cheiro a fumo do carro: 5 métodos de trabalho

Como tirar o cheiro a fumo do carro: 5 métodos de trabalho

Não é fácil eliminar o cheiro a fumo pungente do seu automóvel. É pegajoso e requer estratégias de remoção rígidas. Felizmente, temo-lo ...
2022-06-28
Notícias
Contaminant Engineering•3 min read

PFAS Water Filtration Technologies Explained: Carbon, Resin & RO

Key Takeaway:

PFAS reduction depends on the specific compounds present, treatment media, contact time, water chemistry, and system design. Activated carbon, ion exchange, and Reverse Osmosis address PFAS through different mechanisms.

PFAS are a large family of persistent fluorinated compounds that can occur in drinking-water supplies. Their treatment behavior varies significantly by molecular structure, chain length, functional group, concentration, and the chemistry of the source water.

Granular Activated Carbon (GAC) removes PFAS primarily through adsorption. It is generally more effective for many longer-chain PFAS, while shorter-chain compounds tend to break through more quickly. Carbon performance depends on media properties, Empty Bed Contact Time (EBCT), competing organic matter, loading, and replacement frequency.

Ion-exchange resins use charged functional sites to capture many PFAS compounds. Properly selected anion-exchange media can provide high capacity and may perform better than conventional activated carbon for some shorter-chain PFAS, although performance still depends on water chemistry and competing ions.

Reverse Osmosis (RO) uses membrane separation rather than adsorption. Properly designed RO systems can provide broad reduction across many PFAS compounds as well as dissolved salts and other contaminants. Unlike carbon or resin, however, RO also produces a concentrate stream that must be managed.

No single technology should be selected from a PFAS label alone. System design should consider which PFAS compounds are present, their concentrations, required reduction targets, flow rate, media life, and the applicable third-party certification or validation requirements.

HisoAir Water Technical Series
Product Discovery•3 min read

How to Choose an Under-Sink Water Purifier for Modern Kitchens

Key Takeaway:

Match the treatment technology to your water quality first, then evaluate cabinet space, faucet configuration, flow rate, drain and power requirements, and filter replacement needs.

Choosing an under-sink water purifier starts with water chemistry. Carbon filtration is well suited to chlorine, taste, odor, and many organic contaminants, while Reverse Osmosis is more appropriate when dissolved salts, fluoride, nitrates, or broader dissolved contaminants need to be reduced.

For compact kitchens, tankless RO systems eliminate the conventional storage tank and can significantly reduce the space required under the sink. However, membrane capacity stated in GPD does not directly equal faucet flow. When comparing systems, check the actual dispensing flow rate, inlet-pressure requirement, recovery ratio, and whether a booster pump is required.

Installation architecture also matters. Many RO systems require a drain connection, electrical power, and either a dedicated drinking-water faucet or a compatible multi-function faucet. High-flow carbon systems can often connect directly to the existing cold-water line with a simpler installation, but pressure drop and available faucet flow should still be verified.

RO also removes much of the naturally occurring dissolved mineral content. Where taste or mineral balance is a priority, a post-RO remineralization stage can be added. Filter life should be evaluated by both rated capacity and local water quality rather than replacement time alone.

The right system is therefore not simply the smallest or highest-GPD model. It is the configuration that matches the target contaminants, available cabinet space, desired faucet setup, peak dispensing demand, and maintenance expectations.

HisoAir Water Technical Series
Water Quality•2 min read

What Does TDS Mean in Drinking Water? Measurement vs Contaminant Reality

Key Takeaway:

A TDS meter estimates the overall concentration of dissolved ionic substances from electrical conductivity. It cannot identify specific contaminants or determine whether water is chemically safe.

Total Dissolved Solids (TDS) refers to the combined concentration of dissolved substances in water. Most handheld TDS meters do not measure TDS directly. Instead, they measure electrical conductivity (EC) and convert that reading into an estimated parts-per-million (ppm) value.

This means a TDS reading can indicate how much dissolved ionic material is present, but not what that material actually is. Calcium, magnesium, sodium, nitrates, and other dissolved ions can all contribute to conductivity, yet a simple TDS meter cannot distinguish between them.

TDS meters are also not suitable for detecting trace contaminants such as PFAS, many VOCs, pesticides, pharmaceuticals, or disinfection byproducts. These substances may be present at concentrations far below the level needed to noticeably change electrical conductivity.

A low TDS reading therefore does not guarantee safe drinking water, and a higher TDS reading does not automatically indicate contamination. Water-treatment decisions should be based on laboratory testing for specific contaminants of concern rather than TDS alone.

HisoAir Water Technical Series
Technology Selection•2 min read

RO vs UF Water Filtration: Understanding Pore Sizes & Dissolved Minerals

Key Takeaway:

Ultrafiltration can reduce bacteria, turbidity, and suspended particles while retaining most naturally occurring dissolved minerals. Reverse Osmosis provides much broader reduction of dissolved salts and smaller contaminants.

Ultrafiltration (UF) typically uses hollow-fiber membranes with pore sizes in the approximate 0.01–0.1 micron range. These membranes physically retain turbidity, suspended solids, colloids, and many microorganisms while allowing dissolved minerals and salts to remain in the water.

Reverse Osmosis (RO) operates at a much finer separation level. Unlike UF, RO can substantially reduce dissolved ions such as sodium, calcium, fluoride, nitrates, and other contributors to total dissolved solids (TDS). This makes RO more suitable when dissolved-salt reduction is a primary treatment objective.

UF generally requires less system pressure and produces little or no continuous concentrate stream in many point-of-use configurations. RO typically requires greater pressure and produces a reject-water stream, but delivers broader contaminant reduction.

For water with acceptable TDS and mineral content, UF can be a simpler mineral-retaining treatment option. Where dissolved salts, fluoride, nitrates, or broader dissolved contaminants are a concern, RO is generally the more appropriate technology.

HisoAir Water Technical Series
Technology Selection•4 min read

Carbon Block vs Reverse Osmosis: Which Fits Your Need?

Key Takeaway:

Choose RO for dissolved inorganic salts and heavy metals; choose Carbon Block for chemical taste/odor, no wastewater, and high line-pressure flow.

Reverse Osmosis (RO) and Carbon Block filtration represent two fundamentally different treatment methods: membrane separation and adsorption. Understanding these differences helps determine which technology is better suited to a specific water-quality requirement.

Reverse Osmosis uses a semi-permeable membrane with pore sizes of approximately 0.0001 microns. It can significantly reduce dissolved inorganic contaminants such as TDS, fluoride, nitrates, and certain heavy metals. Because water must be forced through the membrane, RO systems require sufficient pressure or a booster pump and generate a concentrated wastewater stream.

Carbon Block filtration relies primarily on adsorption through compressed activated carbon, commonly with nominal pore sizes around 0.5–5 microns. It is highly effective for chlorine, chloramines, VOCs, taste, and odor, while allowing substantially higher direct-flow rates without producing wastewater.

From an operating perspective, Carbon Block systems are generally simpler, require less energy, and avoid the water loss associated with RO. RO involves higher system complexity and operating cost, but provides substantially broader reduction of dissolved contaminants that Carbon Block alone cannot address.

HisoAir Water Technical Series

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