Thermodynamics of phenanthrene partition into solid organic matter from water | |
Chen, BL ; Zhu, LZ ; Tao, S | |
刊名 | journal of environmental sciences china
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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). |
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