US EPA

2510797 

Journal Article 

Effects of Potamogeton crispus L.-bacteria interactions on the removal of phthalate acid esters from surface water 

Chi, J; Gao, J 

2015 

Yes 

Chemosphere
ISSN: 0045-6535
EISSN: 1879-1298 

Elsevier Ltd 

OXFORD 

Chemosphere. 2015, Jan; 119:59-64. [Chemosphere] 

119 

59-64 

English 

24968306 

10.1016/j.chemosphere.2014.05.058 

WOS:000347739600009 

https://search.proquest.com/docview/1836661128?accountid=171501
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To investigate the mechanism of submerged macrophyte-bacteria interactions on the removal of phthalic acid esters from surface water, experiments with and without Potamogeton crispus L. were performed. A two-compartment (i.e., water and plant) kinetic model was developed. The model adequately described the variation of dibutyl phthalate (DBP) and di-2-ethylhexyl phthalate (DEHP) in the plant-water system by providing the first-order rate constants of plant uptake (k1) and release (k2), microbial degradation in water (k3) and plant degradation (k4). During 10-d incubation, the presence of P. crispus enhanced the removal of DBP and DEHP from water by 6.3% and 22.4%. Compared with the experiment without P. crispus, biodegradation of DBP in water with P. crispus decreased by 8.3% because of plant uptake even though k3 increased by 30%. 21.4% of DBP transferred from water to plants, of which only small amount (5.1%) retained in the plant and the rest (94.9%) was degraded. Different from DBP, biodegradation of DEHP in water with P. crispus was a slightly higher than that without P. crispus. 25.5% of DEHP transferred from water to plants, of which a large portion (73.3%) retained in the plant and the rest (26.7%) was degraded. This finding reveals that the enhancement of DBP removal from surface water is mainly related to faster degradation in the plant, whereas it is mainly related to higher plant accumulation for DEHP. 

Potamogeton crispus L.-bacteria interactions; Model; Phthalate acid ester; Removal; Surface water