Here are some sites which you may wish to visit for further information on copyediting:
1. Follow Alpha Science Editors on Twitter for regular updates, language tips and links to great articles on language use.
2. The Editorial Freelancers Association is at www.the-efa.org
3. The Society for Editors and Proofreaders is at www.sfep.org.uk
4. For information on how to become a proofreader or copy editor, have a look at www.copyediting.co.uk