Fractions Transformation and Dissipation Mechanism of Dechlorane Plus in the Rhizosphere of the Soil-Plant System

Cheng, Yu1; Ding, Jue3; Liang, Xiuyu4; Ji, Xiaowen1; Xu, Ling2; Xie, Xianchuan1,2; Zhang, You-Kuan4

2020-06-02

10.1021/acs.est.9b06748

ENVIRONMENTAL SCIENCE & TECHNOLOGY   影响因子和分区

0013-936X

1520-5851

The fractions transformation and dissipation mechanism of Dechlorane Plus (DP) in the rhizosphere of soil-plant system were investigated and characterized by a 150-day experiment using a rhizobox system. The depuration, accumulation, and translocation of DP in rice plants were observed. The contributions of plant uptake, microbial degradation, and bound-residue formation to DP dissipation under the rhizosphere effect were modeled and quantified. The gradients of DP concentrations correlated well with microbial biomass in the rhizosphere (R-2 = 0.898). The rhizosphere facilitated the bioavailability of DP (excitation) and modified the bound-residue formation of DP (aging). DP concentrations in roots were positively correlated with the labile fraction of DP in soil (R-2 = 0.852-0.961). There were spatiotemporal variations in the DP fractions. Dissolved and soil organic carbon were important influences on fraction transformation. Contributions to total DP dissipation were in the following ranges: microbial degradation (8.33-54.14%), bound-residue formation (3.64-16.43%), and plant uptake (0.54-3.85%). With all of these processes operating, the half-life of DP in the rhizosphere was 105 days. The stereoselectivity of DP isomers in both rice and DP fractions in soil were observed, suggesting a link between stereoselective bioaccumulation of DP in terrestrial organisms and dissipation pathways in soil.

SCI ; EI

英语

NI期刊 ; NI论文

其他

Jiangsu Nature Science Fund[BK20151378][BE2015708] ; National Natural Science Foundation of China[41203062][51438008] ; Major Science and Technology Program for Water Pollution Control and Treatment of China[2015ZX07204][2017ZX07602] ; Fundamental Research Funds for the Central Universities[090514380001]

Engineering ; Environmental Sciences & Ecology

Engineering, Environmental ; Environmental Sciences

WOS:000538420500018

AMER CHEMICAL SOC

20202808909074

Biodegradation ; Isomers ; Stereoselectivity ; Biochemistry ; Organic carbon

Biotechnology:461.8 ; Soils and Soil Mechanics:483.1 ; Chemistry:801 ; Biochemistry:801.2 ; Chemical Reactions:802.2 ; Chemical Products Generally:804 ; Organic Compounds:804.1

ENVIRONMENT/ECOLOGY

Web of Science

1.Nanjing Univ, Sch Earth Sci & Engn, Sch Environm, State Key Lab Pollut Control & Resource Reuse, Nanjing 210023, Peoples R China
2.Nanjing Innovat Ctr Environm Protect Ind Co Ltd, Nanjing 210042, Peoples R China
3.Hohai Univ, Coll Environm, Nanjing 210098, Peoples R China
4.Southern Univ Sci & Technol, Sch Environm Sci & Engn, State Environm Protect Key Lab Integrated Surface, Shenzhen 518055, Guangdong, Peoples R China

Cheng, Yu,Ding, Jue,Liang, Xiuyu,et al. Fractions Transformation and Dissipation Mechanism of Dechlorane Plus in the Rhizosphere of the Soil-Plant System[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2020,54(11):6610-6620.

Cheng, Yu.,Ding, Jue.,Liang, Xiuyu.,Ji, Xiaowen.,Xu, Ling.,...&Zhang, You-Kuan.(2020).Fractions Transformation and Dissipation Mechanism of Dechlorane Plus in the Rhizosphere of the Soil-Plant System.ENVIRONMENTAL SCIENCE & TECHNOLOGY,54(11),6610-6620.

Cheng, Yu,et al."Fractions Transformation and Dissipation Mechanism of Dechlorane Plus in the Rhizosphere of the Soil-Plant System".ENVIRONMENTAL SCIENCE & TECHNOLOGY 54.11(2020):6610-6620.