Humic acid (HA ) was abstracted from leonardite,and a composite superabsorbent (HA PSA ) was prepared by compounding poly (acrylic acid ) and lignitic humic acid.
The French PSA group which manufactures Peugeot Citroen cars says it's considering taking over Opel, the European business at the U.S. car giant General Motors.
Bucking that trend, PSA, the maker of Peugeots and Citroens, reported a surprise profit for the first half of the year, even though revenues plummeted.