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| Elemental Chlorine Free | |
|---|---|
| Name | Elemental Chlorine Free |
| Abbreviation | ECF |
| Type | Pulp bleaching specification |
| Introduced | 1970s |
| Industry | Pulp and paper |
| Related | Totally Chlorine Free, Process Chlorine Free |
Elemental Chlorine Free Elemental Chlorine Free is a specification used in the pulp and paper industry for bleaching processes that avoid the use of elemental chlorine gas. The term primarily applies to mill-scale decisions by producers such as International Paper, Stora Enso, UPM-Kymmene Corporation, and Mondi Group to shift bleaching chemistry toward alternatives like chlorine dioxide while addressing environmental concerns raised by regulators including the United States Environmental Protection Agency, the European Union, and advocacy groups such as the World Wildlife Fund and Greenpeace. ECF intersects with corporate sustainability programs at companies like Procter & Gamble, Walmart, IKEA, The New York Times Company, and standards bodies such as the Forest Stewardship Council and the Programme for the Endorsement of Forest Certification.
Elemental Chlorine Free refers to pulp bleaching processes that do not employ elemental chlorine gas (Cl2) but may use oxidants including chlorine dioxide, oxygen delignification, hydrogen peroxide, and ozone. The scope encompasses bleaching stages in kraft, sulfite, and mechanical pulp mills operated by firms such as Domtar Corporation, Bowater, Sappi Limited, Norske Skog, and Georgia-Pacific, and is monitored under regulations from agencies like the United States Environmental Protection Agency and the European Commission. Policy influence has come from initiatives by The Nature Conservancy, United Nations Environment Programme, World Business Council for Sustainable Development, and corporate purchasers such as Apple Inc., Google LLC, Amazon.com, Inc., and Microsoft Corporation.
The development of alternatives to elemental chlorine gas emerged amid environmental campaigns and scientific findings in the 1970s and 1980s, with prominent actors including Greenpeace International, researchers at Carleton University, and toxicologists working with the International Agency for Research on Cancer. Major industry shifts occurred following regulatory actions such as amendments to the Clean Water Act and policy decisions in the European Union Council, and after corporate commitments by Westvaco Corporation, Weyerhaeuser, and Kimberly-Clark Corporation. Innovations were driven by pilot projects at institutes like the Pulp and Paper Research Institute of Canada, universities such as Aalto University, University of Toronto, and technology providers including Andritz AG and Voith GmbH.
ECF processes replace elemental chlorine with oxidants such as chlorine dioxide generated on-site using chemicals supplied by firms like Solvay S.A. and BASF SE, or by integrating technologies such as oxygen delignification and hydrogen peroxide bleaching from vendors like Metso Outotec. Alternatives include Totally Chlorine Free (TCF) systems using oxygen and peroxide and Process Chlorine Free approaches in mills run by companies like Södra and Ahlstrom. Research into enzymatic bleaching by groups at ETH Zurich, VTT Technical Research Centre of Finland, and KTH Royal Institute of Technology explores biobleaching with laccases and manganese peroxidases, while pilot ozone bleaching projects have been trialed by Foster Wheeler and research consortia involving European Commission funding programs.
Switching from elemental chlorine to ECF reduces formation of chlorinated organic pollutants such as dioxins and furans in effluents from mills operated by entities like Sappi and Mondi, a concern highlighted by scientists affiliated with World Health Organization, United Nations Environment Programme, and national agencies including Health Canada. Studies published by researchers at EPA laboratories, Karolinska Institutet, and Harvard School of Public Health examined released chlorinated compounds, bioaccumulation documented by teams at Smithsonian Institution and National Oceanic and Atmospheric Administration, and human exposure assessments referenced in reports from Centers for Disease Control and Prevention and European Food Safety Authority. Critics argue residual chlorinated organics persist even under ECF in cases reviewed by panels convened by Organisation for Economic Co-operation and Development and academic groups at University of British Columbia.
Certification and standards bodies such as the Forest Stewardship Council, Programme for the Endorsement of Forest Certification, ISO, and private ecolabels managed by Blue Angel and Nordic Swan incorporate ECF considerations into procurement criteria used by purchasers like The Coca-Cola Company, PepsiCo, Inc., Johnson & Johnson, and Unilever. Technical standards and best practices are published by organizations including the Technical Association of the Pulp and Paper Industry (TAPPI), the American Forest & Paper Association, and CEN committees, with mill audits performed by auditors from Bureau Veritas, SGS S.A., and DNV. Public procurement policies in jurisdictions such as California, Sweden, and United Kingdom reference ECF or equivalent processes in tenders by agencies like European Commission and United Nations procurement units.
Adoption accelerated in the 1990s and 2000s as multinational publishers such as Pearson PLC, Bertelsmann, and Reed Elsevier and publishers like Houghton Mifflin Harcourt and newspapers including The Guardian and The Washington Post demanded ECF pulp. Market trends were tracked by research firms such as McKinsey & Company, Deloitte, PricewaterhouseCoopers, and trade publications like Pulp and Paper International and PaperAge. Regional adoption varies among producers in Canada, Finland, Sweden, United States, Brazil, and Chile, influenced by corporate social responsibility reporting requirements from frameworks including Global Reporting Initiative and investor pressure from groups like Climate Action 100+.
Controversies involve debate between proponents of ECF (industry groups such as the American Forest & Paper Association and companies like Domtar) and advocates for Totally Chlorine Free promoted by Greenpeace and academics at institutions like University of Helsinki and Stockholm University. Critics cite residual chlorinated byproducts identified in studies by University of Gothenburg and policy critiques by Friends of the Earth and argue that ECF merely reduces rather than eliminates risk, while industrial stakeholders point to life-cycle assessments by IVL Swedish Environmental Research Institute and cost analyses by OECD demonstrating trade-offs. Legal and procurement disputes have involved municipal purchasers in cities such as San Francisco, London, and Helsinki over specification language and ecolabel recognition.