Biofiltration onto pine bark for the treatment of water contaminated with atrazine: influence of sorbent on Pseudomonas sp. strain adp

Abstract

To cite this version:Sophie Gendrault, Rémy Bayard, Rémy Gourdon. Biofiltration onto pine bark for the treatment of water contaminated with atrazine: influence of sorbent on Pseudomonas sp. strain adp. Agronomy for Sustainable Development, Springer Verlag/EDP Sciences/ INRA, 2005, 25 (2), pp.317-321. hal-00886280 317 Agron. Sustain. Dev. 25 (2005) 317-321Abstract -A combination of adsorption and biodegradation processes was studied as a potential for the treatment of water contaminated with atrazine. Pine bark was used as a cheap and readily available sorbent, and Pseudomonas sp. strain ADP as atrazine degrader. Pseudomonas sp. strain ADP was found to be able to grow in the aqueous bark extract and to use the soluble bark organics as carbon sources. However, a lag period of about 25 hours was observed in cultures in sterile bark extract for the growth and atrazine biodegradation as compared with the cultures grown in a mineral medium. In pine bark aqueous extract, Pseudomonas sp. strain ADP was shown to mineralize 75% of atrazine in 330 hours (initial concentration of 44.2 µg·L -1 ). The presence of sterile pine bark particles (liquid to solid ratio of 20) in mineral medium reduced the yield down to 50% due to atrazine sorption onto bark. atrazine / mineralization / adsorption / pine bark / Pseudomonas ADP sp. / water

Concurrent nitrate and atrazine retention in bioreactors of straw and bark mulch at short hydraulic residence times

“…Gendrault et al (2005) observed high adsorption of atrazine onto pine bark. In more general attempts positive correlation of atrazine adsorption and organic content in soils were found (Boivin et al, 2005;Spongberg and Ganglian, 2000), whereas no similar effect is known for bentazone.…”

“…Gendrault et al (2005) found that degradation of atrazine in bark extract by isolated Pseudomonas sp. strain adp (facultative denitifier) was admittedly reduced from 75 to 50% by irreversible sorption on fine bark particles (<2 mm) but not stopped.…”

Organic xenobiotics removal in constructed wetlands, with emphasis on the importance of the support matrix

“…In addition they also provide suitable growth media for microorganisms, which has been reported to be useful for the biodegradation of some pollutants [308,309].…”

The use of a natural substrate for immobilization of microalgae cultivated in wastewater

“…5). Pine bark like other biosorbents is able to retain various types of organic and inorganic pollution [47][48][49] . The bark also acts as a natural biofilter for solid particles 48 , thus contributes to the retention of microalgae biomass and wastewater treatment.…”