Promotion of biosurfactants on washing of PCBs from contaminated soil
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Abstracts / Journal of Biotechnology 136S (2008) S678S707 S687
Promotion of biosurfactants on washing of PCBs from contam-inated soil
Hong Liua,, Zhou Shib, Naiyun Gaoa, Quan Sunb
a School of Environmental Science and Engineering, State Key Lab-oratory of Pollution Control and Resources Reuse, Tongji University,Shanghai, Chinab Department of Water Science and Engineering, College of Civil Engi-neering, Hunan University, Changsha, China
E-mail address: firstname.lastname@example.org (H. Liu).
The effect of several kinds of biosurfactants solution on washingof polychlorinated biphenyls (PCBs) from contaminated soil wasinvestigated. The results show that the desorption of PCBs fromcontaminatedsoil is affectedby theconcentrationofbiosurfactants,reaction time and the ionic strength. Biosurfactants do not improvePCBs desorption fromcontaminated soilwhen their concentrationsare below or near their critical miHowever, biosurfactants could obefciency when the concentratiodesorbed amount of PCBs increafactants concentrations. There exregarding to theeffect of reaction titive inuence on washing of PCBindicate the high extract power oluted soil and potential use of biosof PCBs or other low-polarity org
Keywords: Biosurfactant; PCBs (poing; Contaminated soil
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Mechanism and performancewastewater with acid dyes by UA
Li Xiu-Fena,b,, Wijetunga Somas
a Lab of Environmental BiotechnolCivil Engineering, Jiangnan UniveJiangsu 214122, Chinab National key lab of Food Science anLihu Road 1800, Wuxi City, Jiangsu
E-mail addresses: email@example.com@yahoo.com (W. Somasiri),
The aim of this paper was to invof colour and COD removal andacid dyes on the performance ofreactor with different COD levels
ater. The experiments were conducted by mixing acid red 131,acid yellow 79 and acid blue 204. Acid red 131 and acid yel-low 79 were decolourized through the biodegradation while acidblue 204 was via adsorption onto microbial granules in upowanaerobic sludge blanket reactor, which were conrmed by theinspection of UVvis spectrum. The alkalinity and volatile fattyacids in anaerobic reactor were in the recommended range of10005000mgL1 and less than 250mgL1, respectively, duringthe whole operation. The specic methanogenic activity of anaer-obic granules was not considerably affected by the mixture ofacid dyes. COD removal increased as cosubstrate concentrationsamounted to3000mgL1.Over85%colour removalwasachievedat300mgL1 dye concentration. If organic loading in textile wastew-ater is not sufcient for the operation of upow anaerobic sludgeblanket system, it is essential to provide additional carbon source(bymixingwithotherwastewaters, for examplemunicipalwastew-ater).
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., Braurds re
186 (207. A3 froml. J. Co
waisolashowof cading7.0, 390%er phbolitstraide c
iffereidedeC35celle concentration (CMC) values.viously enhance the desorption
ns exceeded the CMC values. Theses with the increase of biosur-ist a washing balance time pointime. The ionic strengthhadapos-s from soil. The results obtainedf biosurfactants toward PCBs pol-urfactants for in situ remediationanic contaminated soils.
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ogy, School of Environmental andrsity, Lihu Road 1800, Wuxi City,
d Technology, JiangnanUniversity,214122, China
d.cn (L. Xiu-Fen),firstname.lastname@example.org (C. Jian).
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Phenanthrene biodegradatand its crude extracts
Yuanyuan Qu , Qiang Zhang
School of Environmental andLaboratory of Industrial Ecologistry of Education, China), D116024, China
E-mail address: yuanyuanqu@
The purpose of this studybiodegradation by a newlycrude extracts. The resultsphenanthrene as sole sourceed as Burkholderia sp. accorthe optimal conditions (pH(100mgL1) was removedstrain AFF could tolerate high300mgL1. Two major metaHPLC/MS. It is proposed thatpathway. The activity of crufrom strain AFF was maintaiperature (1080 C) and pHwas inhibited by Co2+, Zn2+,activities were inhibited at dascorbic acid, while acryl ameffect on enzymeactivity. Cruwith molecular mass nearlysis., F., 2006. Treatment and reuse of reactive2), 1534.H.M., Goncalves, I.C., 2005. Monoazo andmethanogenic UASB reactor. J. Biotechnol.
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y a novel Burkholderia sp. AFF
Zhou, Fangfang Ai
gical Science and Technology, KeyEnvironmental Engineering (Min-University of Technology, Dalian
oo.cn (Y. Qu).
s to investigate phenanthreneted Burkholderia sp. AFF and itsed that strain AFF could utilizerbon and energy, and was identi-to 16S rRNA gene analysis. Under0 C, 150 rmin1), phenanthrenewithin 84h by strain AFF. Andenanthrene concentration about
es were isolated and identied byn AFF possesses the salicylic acidatechol 2,3-dioxygenase (C23O)t high level over a range of tem-9.0). The activity of crude C23O, Fe2+ and Fe3+. And the enzyment levels by H2O2, KI, SDS and l-and dithiothreitol (DTT) had less23Owas further partially puriedkDa by SDS-PAGE electrophore-