Mineralization of surfactants by the microbiota of submerged plant detritus

Journal Article · Thu Feb 01 04:00:00 EST 1990 · Applied and Environmental Microbiology; (USA)

OSTI ID:6749842

Federle, T W ^[1]; Ventullo, R M ^[2]

---

1. Procter and Gamble Company, Cincinnati, OH (USA)
2. Univ. of Dayton, OH (USA)

In wetlands and canopied bodies of water, plant detritus is an important source of carbon and energy. Detrital materials possess a large surface area for sorption of dissolved organics and are colonized by a large and diverse microbiota. To examine the biodegradation of surfactants by these microorganisms, submerged oak leaves were obtained from a laundromat wastewater pond, its overflow, and a pristine control pond. Leaves were cut into disks and incubated in sterile water amended with 50 {mu}g of {sup 14}C-labeled linear alkylbenzene sulfonate (LAS), linear alcohol ethoxylate, stearyltrimethyl ammonium chloride, distearyldimethyl ammonium chloride, benzoic acid, or mixed amino acids per liter. Sorption of the test compounds to the detritus and evolution of {sup 14}CO{sub 2} were followed with time. All of the compounds sorbed to the detritus to various degrees, with LAS and stearyltrimethyl ammonium chloride the most sorptive and benzoic acid the least. All compounds were mineralized without a lag. With leaves from the laundromat wastewater pond, half-lives were 12.6 days for LAS, 8.4 days for linear alcohol ethoxylate, 14.2 days for stearyltrimethyl ammonium chloride, 1.0 days for benzoic acid, and 2.7 days for mixed amino acids. Mineralization of LAS and linear alcohol ethoxylate by control pond leaves was slower and exhibited an S-shaped rather than a typical first-order pattern. This study shows that detritus represents a significant site of surfactant removal in detritus-rich systems.

• OSTI ID: 6749842
• Journal Information: Applied and Environmental Microbiology; (USA), Journal Name: Applied and Environmental Microbiology; (USA) Vol. 56:2; ISSN 0099-2240; ISSN AEMID
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540311* -- Environment
Aquatic-- Basic Studies-- Radiometric Techniques-- (1990-)
AQUATIC ECOSYSTEMS
BIODEGRADATION
CARBON 14 COMPOUNDS
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
DECOMPOSITION
DETRITUS
ECOSYSTEMS
ISOTOPE APPLICATIONS
LABELLED COMPOUNDS
LEAVES
MICROORGANISMS
MINERALIZATION
OXIDES
OXYGEN COMPOUNDS
REMOVAL
SURFACE WATERS
SURFACTANTS
TRACER TECHNIQUES
WETLANDS