Thermodynamics of phenanthrene partition into solid organic matter from   water

CORC > 北京大学 > 城市与环境学院

	Thermodynamics of phenanthrene partition into solid organic matter from water
	Chen, BL ; Zhu, LZ ; Tao, S
刊名	journal of environmental sciences china
	2005
关键词	soil bentonite phenanthrene sorption thermodynamics SOIL SORPTION SEDIMENTS HYDROCARBONS POLLUTANTS EQUILIBRIA DESORPTION ADSORPTION ACID
英文摘要	The thermodynamic behavior of organic contaminants in soils is essential to develop remediation technologies and assess risk from alternative technologies. Thermodynamics of phenanthrene partition into four solids(three soils and a bentonite) from water were investigated. The thermodynamics parameters ( Delta H, Delta G, Delta S degrees, A So were calculated according to experimental data. The total sorption heats of phenanthrene to solids from water ranged from - 7.93 to 17.1 kJ/mol, which were less exothermic than the condensation heat of phenanthrene-solid(i. e., - 18.6 kJ/mol). The partition heats of phenanthrene dissolved into solid organic matter ranged from 23.1 to 32.2 kJ/mol, which were less endothermic than the aqueous dissolved heat of phenanthrene ( i. e., 40.2 kJ/mol), and were more endothermic than the fusion heat of phenanthrene- solid( i. e., 18.6 kJ/mol). The standard free energy changes, Delta G degrees, are all negative which suggested that phenanthrene sorption into solid was a spontaneous process. The positive values of standard entropy changes, Delta S degrees, show a gain in entropy for the transfer of phenanthrene at the stated standard state. Due to solubility-enhancement of phenanthrene, the partition coefficients normalized by organic carbon contents decrease with increasing system temperature(i. e., In K-oc = - 0.284In S + 9.82( n = 4, r(2) = 0. 992)). The solubility of phenanthrene in solid organic matter increased with increasing temperatures. Transports of phenanthrene in different latitude locations and seasons would be predicted according to its sorption thermodynamics behavior.; Environmental Sciences; SCI(E); EI; 中国科技核心期刊(ISTIC); 中国科学引文数据库(CSCD); 0; ARTICLE; 2; 185-189; 17
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/399728]
专题	城市与环境学院
推荐引用方式 GB/T 7714	Chen, BL,Zhu, LZ,Tao, S. Thermodynamics of phenanthrene partition into solid organic matter from water[J]. journal of environmental sciences china,2005.
APA	Chen, BL,Zhu, LZ,&Tao, S.(2005).Thermodynamics of phenanthrene partition into solid organic matter from water.journal of environmental sciences china.
MLA	Chen, BL,et al."Thermodynamics of phenanthrene partition into solid organic matter from water".journal of environmental sciences china (2005).