The use of chlorine for bleaching and processing wood pulp to make paper is one of industry's dirtiest environmental practices, producing various highly toxic pollutants, including dioxin. Cleaner methods are available but chlorine has several big advantages; it's cheap and it works well. Now a chemist at Carnegie Mellon University (CMU) has developed a family of iron-based catalysts that could make one of the leading chlorine alternatives-hydrogen peroxide-more commercially attractive.

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