Characteristics and Reactivity of Algae-Produced Dissolved Organic Carbon

نویسندگان

  • My-Linh Nguyen
  • Paul Westerhoff
  • Lawrence Baker
  • Qiang Hu
  • Mario Esparza-Soto
  • Milton Sommerfeld
چکیده

Algae green, blue–green, and diatom grown in inorganic media produced particulate and dissolved organic carbon DOC . DOC produced by a green-alga contains 25% hydrophobic acids. DOC from all algae had specific ultraviolet absorbance values less than 2.0 m−1 mg/L −1. Algae-produced DOC was biologically labile; greater than 60% degraded in bioreactors within 5 days. The biodegradable material likely included carbohydrates, amino acids, and amino sugars, which were present in hydrophobic acid isolates. Chlorination of algal DOC formed disinfection by-products; DOC from the green alga, Scenedesmus quadricauda, produced chloroform 0.53 micromole per mg carbon mol/mg C , dichloroacetic acid 0.27 mol/mg C , and trichloroacetic acid 0.14 mol/mg C . This work complements other studies, which focused on algal total organic carbon DOC and cellular material , and clearly demonstrates the importance of identifying algae-derived sources of DOC in water supplies and removing such DOC in water treatment plants prior to

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تاریخ انتشار 2005