Kinetics and pathway of atrazine degradation by a novel method: Persulfate coupled with dithionite

Song, Wei1; Li, Ji1; Fu, Caixia2; Wang, Zhuoyue1; Zhang, Xiaolei1; Yang, Jingxin3; Hogland, William4; Gao, Ling4,5

2019-10

10.1016/j.cej.2019.05.110

CHEMICAL ENGINEERING JOURNAL   影响因子和分区

1385-8947

1873-3212

Efficient and environmentally friendly activation methods of persulfate (PS) have gained growing attention in the remediation of water or soil polluted by organic contaminants. Among all, the exploration of effective and applicable method for the PS activation becomes one of the hottest topics in the field of organic degradation. Dithionite (DTN) was employed in this study to activate PS and applied to degrade Atrazine (ATZ) without secondary pollution. ATZ could be completely degraded within 90 min by PS/DTN system. ATZ degradation by PS obeyed the pseudo-first-order kinetics and the rate constant values increased from (4.71-5.05) x10(-3) min(-1) to (4.59-5.09) x10(-2) min(-1) with the addition of DTN. Sulfate radicals were verified to be the dominant reactive species through the radical scavenging experiment. PS/DTN system can remain a strong oxidative ability in the range of pH below 9.0. The presence of Cl-, natural organic matter (NOM), and high concentration of HCO3- may inhibit the removal of ATZ while the low concentration of HCO3- can slightly promote the degradation. It was found that the degradation pathways of ATZ by PS/DTN involved de-chlorination and hydroxylation, de-alkylation, and de-amination by the reactive species. The study reveals that PS/DTN system has the broad application prospect in the treatment of refractory pollutants.

Persulfate Dithionite Atrazine Sulfate radical Degradation pathway

SCI ; EI

英语

其他

Shenzhen Demonstration Project[KJYY20171012140149523]

Engineering

Engineering, Environmental ; Engineering, Chemical

WOS:000471682900076

ELSEVIER SCIENCE SA

20192106959600

Amines ; Biological materials ; Chemical activation ; Herbicides ; Pollution ; Rate constants ; Sulfur compounds

Water Treatment Techniques:445.1 ; Biological Materials and Tissue Engineering:461.2 ; Chemical Reactions:802.2 ; Organic Compounds:804.1

ENGINEERING

Web of Science

1.Harbin Inst Technol Shenzhen, Shenzhen Key Lab Water Resource Applicat & Enviro, Sch Civil & Environm Engn, Shenzhen 518055, Peoples R China
2.Southern Univ Sci & Technol, Sch Environm Sci & Engn, Shenzhen 518055, Peoples R China
3.Guangzhou Univ, Inst Environm Res Greater Bay, Minist Educ, Key Lab Water Qual & Conservat Pearl River Delta, Guangzhou 510006, Guangdong, Peoples R China
4.Linnaeus Univ, Fac Hlth & Life Sci, Dept Biol & Environm Sci, S-39182 Kalmar, Sweden
5.Beihua Univ, Forestry Coll, Dept Environm Sci, Jilin 132013, Jilin, Peoples R China

Song, Wei,Li, Ji,Fu, Caixia,et al. Kinetics and pathway of atrazine degradation by a novel method: Persulfate coupled with dithionite[J]. CHEMICAL ENGINEERING JOURNAL,2019,373:803-813.

Song, Wei.,Li, Ji.,Fu, Caixia.,Wang, Zhuoyue.,Zhang, Xiaolei.,...&Gao, Ling.(2019).Kinetics and pathway of atrazine degradation by a novel method: Persulfate coupled with dithionite.CHEMICAL ENGINEERING JOURNAL,373,803-813.

Song, Wei,et al."Kinetics and pathway of atrazine degradation by a novel method: Persulfate coupled with dithionite".CHEMICAL ENGINEERING JOURNAL 373(2019):803-813.