Effect of rhamnolipid biosurfactant on solubilization of polycyclic aromatic hydrocarbons

被引：62
|
作者：
Li, Shudong [1 ,2 ]
Pi, Yongrui [1 ,2 ]
Bao, Mutai [1 ,2 ]
Zhang, Cong [1 ,2 ]
Zhao, Dongwei [1 ,2 ]
Li, Yiming [1 ,2 ]
Sun, Peiyan [3 ,4 ]
Lu, Jinren [2 ]
机构：
[1] Ocean Univ China, Minist Educ, Key Lab Marine Chem Theory & Technol, Qingdao 266100, Peoples R China
[2] Ocean Univ China, Coll Chem & Chem Engn, Qingdao 266100, Peoples R China
[3] State Ocean Adm, Key Lab Marine Spill Oil Identificat & Damage Ass, Qingdao 266033, Peoples R China
[4] State Ocean Adm, North China Sea Environm Monitoring Ctr, Qingdao 266033, Peoples R China
来源：
MARINE POLLUTION BULLETIN | 2015年 / 101卷 / 01期
关键词：
Rhamnolipid biosurfactant; Polycyclic aromatic hydrocarbons (PAHs); Solubilization; Naphthalene; Phenanthrene; Pyrene; CONTAMINATED SOIL; CATIONIC SURFACTANTS; BACILLUS-MEGATERIUM; CRUDE-OIL; PAHS; SEDIMENTS; REMEDIATION; TOXICITY; BIODEGRADATION; BIOMARKERS;
D O I：
10.1016/j.marpolbul.2015.09.059
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Rhamnolipid biosurfactant-producing bacteria, Bacillus Lz-2, was isolated from oil polluted water collected from Dongying Shengli oilfield, China. The factors that influence PAH solubilization such as biosurfactant concentration, pH, ionic strength and temperature were discussed. The results showed that the solubilities of naphthalene, phenanthrene and pyrene increased linearly with the rise of rhamnolipid biosurfactant dose above the biosurfactant critical micelle concentration (CMC). Furthermore, the molar solubilization ratio (MSR) values decreased in the following order: naphthalene > phenanthrene > pyrene. However, the solubility percentage increased and followed the opposite order: pyrene > phenanthrene > naphthalene. The solubilities of PAHs in rhamnolipid biosurfactant solution increased with the rise of pH and ionic strength, and reached the maximum values under the conditions of pH 11 and NaCl concentration 8 g. L-1. The solubility of phenanthrene and pyrene increased with the rise of temperature. (c) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：219 / 225
页数：7
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