What is Zeolite? Greener, cleaner aquaculture filtration

What is Zeolite?

Most investors have probably never heard of this specialty commodity nor do they know much about its economically important applications across a range of industries, including wastewater treatment, aquaculture filtration and cannabis cultivation.

The global zeolite market totalled more than $26 billion in 2017 and is expected to grow at a CAGR of 4.1 percent over the next decade to reach more than $37 billion by 2026. The factors driving this market growth are increasing demand for products in the agricultural and environmental sectors as well as advancements in research and development for new zeolite uses.

Zeolite properties

A naturally occurring mineral found in ancient volcanic ash and sedimentary rocks, zeolite is an adaptable, flexible and environmentally-friendly material.

Known for its stability, zeolite can withstand high pressure as well as temperatures of up to 1,000 degrees Celsius; it won’t dissolve in water or oxidize in the air. High surface charge density and high cation exchange capacity gives zeolite the ability to absorb and bind to a broad range of materials. The mineral owes its highly absorptive and stable properties to its unique structure perforated by microscopic pores which allows it to trap other molecules inside.

First discovered in 1756 by Swedish geologist Axel Cronstedt, zeolites are aluminosilicates with a three-dimensional crystal structure made from the element’s aluminum, oxygen, silicon and various alkaline-earth metals including sodium, potassium and magnesium.

The relatively open configuration of this structure includes pores, or cavities, which can hold molecules of water. They can also gain or lose water molecules easily in a process called reversible dehydration. Acting as what’s known as a molecular sieve, this allows zeolites to act as natural filters.

What is Zeolite used for?

Zeolite can be used in raw unprocessed form or processed into specific sizes ranging from course granular products to ultra-fine powders depending on the application. Organic and non-toxic, it can be used safely around the home and businesses without harmful effects to humans or animals.

Zeolite applications include organic ice melt, oil absorbent, composting, fertilizer additive, deodorizer, artificial turf infill, detergents, supplementary cementitious material (SCM) and more. Zeolite’s natural filtration properties are also highly valued in the aquaculture industry, which includes fish farming. In this context, zeolite helps to absorb nitrates, nitrites and phosphates to achieve higher water quality.

Zeolite’s unique properties make it ideally suited as an easy and economical solution to challenges faced across many of today’s industries, but especially in the environmental and agricultural sectors.

Materials for a cleaner world and a green economy

Waste water treatment is a major focus of environmental regulations around the world. Alongside the rise in global industrialization and the push for cleaner more sustainable industry practices, the overall wastewater treatment chemicals market is projected to grow at a CAGR of 6 percent from $42.23 billion in 2017 to $56.57 billion by 2022.

Zeolite’s ability to act as a natural water filter — removing ammonia and other toxins from water and soil, minimizing runoff and absorbing odors — makes it an ideal material for managing waste water economically. It can effectively remove excess nutrients such as nitrates, nitrites and phosphorus, which can have disastrous effects on the environment, as evidenced by the dead zones accumulating in watersheds across the United States including Chesapeake Bay. The US government spends $114 billion each year on wastewater treatment, with nutrient removal as the main cost driver.

Most remarkably, zeolites have proven effective at removing the radioactive particles associated with nuclear waste. After Japan’s 2011 Fukushima nuclear disaster, rice farmers spread zeolites on their fields to trap radioactive contaminants.

Where is Zeolite found?

Zeolite deposits occur in many countries across the world, including China, South Korea, Japan, New Zealand, Turkey, United States and Canada. The US Geological Survey reports that there are about 40 types of zeolites with the most commonly mined being chabazite, clinoptilolite and mordenite.

Zeolite: Acts as a natural water filter

Mined by surface methods, zeolite production takes place mainly in China which accounts for nearly a third of the global supply. The United States accounts for around 7 percent of world production. Nevada-based KMI Zeolite’s operation is considered one of the largest and highest grade clinoptilolite deposits in the country. The company has been mining, milling and distributing zeolite since 1994 throughout the US and into international markets, and is also active in researching and developing new products.

While Canada’s production is minimal, according to the USGS, “multiple companies acquired rights to develop properties with significant resources of natural zeolites.” Canadian-based zeolite companies include Progressive Planet Solutions and Canadian Zeolite, a subsidiary of International Zeolite.

Progressive Planet recently procured facilities to screen and bag zeolite sourced from its Z-1 Zeolite Quarry for sale into the Canadian marketplace. The site also includes the Advanced Materials Centre product development lab where the company is working on R&D into innovative zeolite products with a focus on creating lighter, stronger, greener concrete.

International Zeolite owns the Bromley Creek deposit in BC. In 2017, the company signed a supplier agreement with KMI Zeolite enabling it to purchase and market sized zeolite and zeolite products for its US customer base.

Looking forward

As we move further into the 21st century, industries and consumers will be looking to products that offer cleaner, greener solutions to modern day challenges. Zeolite’s unique and environmentally-friendly properties make it an ideal material for meeting a myriad of challenges across a growing number of industries. As demand for this 21st century mineral increases, so will the need for new sources of supply.

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