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Mintek introduces new water filtering membrane technology

Mine-impacted water

Mine-impacted water

3rd November 2023

By: Darren Parker

Creamer Media Senior Contributing Editor Online

     

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National mineral research organisation Mintek has introduced its NICMeR membrane, developed in collaboration with the Department of Science and Innovation’s Nanotechnology Innovation Centre (NIC), to market.

This low-fouling ultrafiltration membrane addresses the harmful metal concentrations inherent in mine-impacted water, while also extending its applications to the potential reuse of industrial and domestic wastewater.

The technology purifies raw water to meet potable standards by removing particulates and pathogens, contributing to improved water quality.

The technology was developed in response to contamination of water resources by mining activities having been a persistent concern for decades in the South African mining landscape.

Emerging from both abandoned and active mines, the contamination of water with harmful metals and sulphates, poses sustained threats to the environment and public health. Stemming from mineral depletion and large-scale mine closures initiated in the 1970s, the consequences of pollution by mining activities still persist, prompting the need for sustainable remedies.

“The enduring impact of mining activities can never be underplayed. Its impact on people, animals and the overall ecological equilibrium requires urgent and impactful solutions.

“The NICMeR membrane maintains constant water quality and can also be used as a standalone system, making it extendable beyond [use in] mining operations, ensuring even the most remote areas can benefit from purified water,” Mintek chief scientist Dr Keneiloe Sikhwivhilu says.

The NICMeR membrane also boasts a feature dubbed a low-fouling design. The term “low-fouling” refers to the membrane's unique resistance to fouling, which is the accumulation of unwanted materials on its surface over time.

“In the context of treating mine-impacted water, a low-fouling design is crucial, as mine-impacted water often contains elevated levels of contaminants that can adhere to the membrane's surface,” explains Sikhwivhilu. 

Mintek CEO Dr Molefi Motuku says the project links to the organisation's mandate, emphasising that Mintek's role extends beyond mere economic considerations, stressing the need for the advancement and adoption of technologies that foster the reuse of scarce resources, particularly water.

"Our strategic focus on water treatment technologies underscores the paramount importance of water reuse . . . Through such innovative initiatives, we align Mintek with the overarching national mission to address societal challenges and actively contribute to forging a sustainable and prosperous South Africa.

“Embracing these technologies isn't merely a luxury. It's a proactive stride towards a resilient and environmentally responsible future. Our commitment extends to collaborating closely with industries, showcasing the tangible impact of this solution and fostering its widespread adoption," he says.

Edited by Chanel de Bruyn
Creamer Media Senior Deputy Editor Online

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