Sorption of Organophosphate Flame Retardants on Pahokee Peat Soil. Issue 9 (2nd June 2016)

• Record Type: Journal Article
• Authors: Zheng, Chunli; Feng, Shanshan; Liu, Pingping; Fries, Elke; Wang, Qiaorui; Shen, Zhenxing; Liu, Hongxia; Zhang, Tiancheng
• Is Part Of: Clean. Volume 44:Issue 9(2016:Sep.)
• Page Start: 1163
• Page End: 1173
• Publication Date: 2016-06-02
• Subjects: Gas chromatography‐mass spectrometry -- Organophosphate flame retardants -- Soil -- Sorption; Water quality -- Periodicals; Water -- Pollution -- Periodicals; Pollution -- Periodicals; Bioremediation -- Periodicals; Sewage -- Periodicals; Water chemistry -- Periodicals; 333.7205
• DOI: 10.1002/clen.201500807
• Languages: English
• ISSNs: 1863-0650

Abstract

Abstract : Organophosphate flame retardants (OPFRs) are classified as re‐emerging pollutants and studies on their environmental fate, e.g ., sorption behavior on soil are still limited. In this paper, three kinds of OPFRs, tri ( n ‐butyl) phosphate (TnBP), tris (2‐butoxyethyl) phosphate (TBEP), and tris (2‐chloroethyl) phosphate (TCEP) were selected and their sorption properties on Pahokee peat soil with high organic matter were investigated by solid phase micro‐extraction coupled with gas chromatography‐mass spectrometry. The sorption kinetics of TnBP, TBEP, and TCEP was found to confirm to the pseudo‐second‐order kinetic model and the sorption rate was controlled by boundary layer diffusion. The Langmuir isotherm model expressed the sorption equilibrium data well, in which TnBP exhibited the strongest affinity to Pahokee peat soil followed by TBEP and TCEP. Sorption thermodynamics indicated that lower temperature was beneficial to the sorption process. Abstract : Tri ( n ‐butyl) phosphate (TnBP), tris (2‐butoxyethyl) phosphate (TBEP), and tris (2‐chloroethyl) phosphate (TCEP) belong to organophosphate flame retardants and are damaging to the environment. Sorption characteristics such as kinetics, isotherm, and thermodynamics were verified. TnBP exhibits the strongest affinity to soil followed by TBEP and TCEP. Experimental evidence shows that lower temperature is beneficial to the sorption process.