Innovative Water Purification Technology Removes Boron From Seawater Without Costly Chemicals

Summary
Researchers at the University of Michigan and Rice University have developed a cost-effective water desalination technology that removes boron from seawater without the need for expensive chemicals. Using carbon cloth electrodes, the system captures boron by splitting water into hydrogen and hydroxide ions, enabling efficient removal. This innovation reduces desalination costs by up to 15%, potentially saving $6.9 billion annually worldwide. The technology also offers a versatile platform to address other contaminants, such as arsenic, with potential applications in sustainable water treatment amidst a growing global water crisis.

A breakthrough water desalination method using carbon cloth electrodes can efficiently remove boron from seawater, eliminating the need for expensive chemicals. This technology, developed by engineers from the University of Michigan and Rice University, was detailed in *Nature Water*.

Boron, a naturally occurring component in seawater, becomes toxic when it surpasses safe levels in drinking water. Traditional desalination methods struggle to remove boron due to its neutral charge in seawater. Plants often rely on costly post-treatment processes, adding bases and acids to transform boron into a removable form.

The new system eliminates this need. It uses a specialized membrane with electrodes that split water into hydrogen and hydroxide ions. The hydroxide attaches to boron, giving it a negative charge, which is then captured by the positive electrode. This process reduces energy and chemical demands, cutting desalination costs by up to 15% (approximately $20 per cubic meter).

Globally, desalination plants could save an estimated $6.9 billion annually. Large facilities like the Carlsbad Desalination Plant in San Diego could see significant financial benefits.

Beyond boron, this adaptable technology could target other contaminants, such as arsenic, by modifying the electrode’s functional groups. It presents a sustainable and cost-effective solution to address the growing global water crisis.

Disclaimer:
This summary is based on research findings from the University of Michigan and Rice University as published in *Nature Water*. Details are subject to further validation and adaptation depending on specific applications or future developments in the field.

source : phys.org