Single-solute and bi-solute sorption of phenanthrene and dibutyl phthalate by plant- and manure-derived biochars
Single-solute and bi-solute sorption of phenanthrene and dibutyl phthalate by plant- and manure-derived biochars
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植物和粪便来源的生物炭对菲和邻苯二甲酸二丁酯的单溶质和双溶质吸附
DOI：
10.1016/j.scitotenv.2013.12.033
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发表时间：
2014-03-01
影响因子：
9.8
通讯作者：
Xing, Baoshan
中科院分区：
文献类型：
--
作者：
Jin, Jie;Sun, Ke;Xing, Baoshan
生物炭的空间排列以及生物炭与疏水性有机化合物的确切相互作用机制在很大程度上仍然未知。研究了植物源和粪肥源生物炭在单溶质和双溶质体系中对邻苯二甲酸二丁酯（DBP）和菲（PHE）的吸附。表面极性与灰分含量之间的显着正相关关系表明，矿物有利于极性基团在颗粒表面的外部分布。生物炭对邻苯二甲酸苯酯和邻苯二甲酸二丁酯的吸附受其表面极性的影响。PHE对DBP的吸附有明显的增强作用，这可能是由于生物炭与PHE形成DBP复合物所致，表明DBP和PHE在生物炭上具有不同的吸附位点。Cd ~（2+）（一种软刘易斯酸）对DBP吸附的增强作用表明，生物炭对DBP的吸附不受π-π相互作用的影响。Cd 2+对生物炭吸附PHE的影响取决于Cd 2+对PHE键合的抑制吸附和Cd 2+络合官能团增强吸附之间的平衡，生物炭吸附的Cd 2+量决定了Cd 2+增加吸附的相对作用在总PHE吸附中。(c)2013爱思唯尔有限公司版权所有。
The spatial arrangement of biochar and the exact underlying interaction mechanisms of biochar and hydrophobic organic compounds both remain largely unknown. The sorption of dibutyl phthalate (DBP) and phenanthrene (PHE) to plant- and manure-derived biochars in both single-and bi-solute systems was investigated. The significant positive relation between surface polarity and ash content suggests that minerals benefit the external distribution of polar groups on particle surfaces. PHE and DBP sorption by the biochars was regulated by their surface polarity. The PHE generally displayed a pronounced enhancement of DBP sorption, likely resulting from the formation of biochar PHE DBP complexes, suggesting that DBP and PHE had different sorption sites on the biochars. The enhancement of Cd2+ (a soft Lewis acid) on DBP sorption implied that pi-pi interactions should not dominate DBP sorption by biochars. The influence of Cd2+ on PHE sorption by biochars would depend on the balance between suppressive sorption by Cd2+ on PHE bonding and enhanced sorption by Cd2+-complexed functionalities, and the amounts of Cd2+ adsorbed by biochars determined the relative role of increased sorption by Cd2+ in the overall PHE sorption. (c) 2013 Elsevier B.V. All rights reserved.