铜-苯并[a]芘复合污染体系中铜的微生物吸附特性
Biosorption Characteristics of Copper(Ⅱ)from Copper-Benzo[a]pyrene Co-existed Solution
查看参考文献22篇
文摘
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研究了铜-苯并[a]芘(BaP)复合污染体系中, 嗜麦芽窄食单胞菌对铜的微生物吸附特性. 实验结果表明, 该菌可以选择性地吸附Cu~((2+)), 并把NO_3~-还原为NO_2~-, pH、投菌量、处理时间和铜浓度等因素及BaP均会对铜的生物吸附产生显著的影响, BaP和这4个因素的相互作用对铜的生物吸附也达到了显著的水平. 投菌量会对铜吸附过程中F~-、Cl~-、NO_2~-、NO_3~-、PO_4~(3-)和SO_4~(2-)等离子的释放产生显著的影响, BaP则会显著的影响F~-、NO_2~-、NO_3~-和PO_4~(3-)的浓度水平. 当BaP的浓度为0、0.1、1.0、10.0 mg·L~(-1)时, 2.5 g·L~(-1)菌体对pH为6.0、浓度为2 mg·L~(-1)的铜溶液的吸附率分别高达97.1%、93.8%、94.0%和93.3%. BaP和铜在2 h内均没有造成菌体表面形态的明显变化; 处理10 mg·L~(-1) Cu~(2+)及其与BaP的复合污染2 d后, 菌体表面会产生突起结构 |
其他语种文摘
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The biosorption characteristics of Cu~(2+)by Stenotrophomonas maltophilia have been studied in a benzo[a]pyrene(BaP)-Cu~(2+)combined pollution system. The results showed that S.maltophilia could adsorb Cu~(2+)selectively and reduce NO_3~- to NO_2~-.BaP, initial pH, biosorbent dosage, contact time and Cu~(2+)concentration were the significant factors for Cu~(2+)removal. The interactions between BaP concentration and these parameters also showed statistical significance. Moreover, the releases of F~-, Cl~-, NO_2~-, NO_3~-, PO_~(3-) and SO_~(2-) by different dosages of S. maltophilia were distinct, while the concentrations of BaP significantly affected the release of F~-, NO_2~-, NO_3~- and PO_4~(3-).In the presence of 0, 0.1, 1 mg·L~(-1) and 10 mg·L~(-1) BaP, the maximum removal ratios of 2 mg·L~(-1) Cu~(2+)at pH 6.0 were 97.1%, 93.8%, 94.0%and 93.3%respectively, when the biosorbent dosage was 2.5 g·L~(-1). Morphological characteristics illuminated that co-existed BaP and Cu~(2+)did not present obviously toxic effects against S.maltophilia within 2 h. However, the cells were surrounded by granules after treated 10 mg·L~(-1) Cu~(2+)and BaP for 2 d |
来源
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农业环境科学学报
,2010,29(9):1777-1783 【核心库】
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关键词
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铜
;
苯并[a]芘
;
微生物吸附
;
嗜麦芽窄食单胞菌
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地址
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1.
中国科学院广州地球化学研究所, 有机地球化学国家重点实验室, 广州, 510640
2.
暨南大学环境工程系, 广州, 510632
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语种
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中文 |
文献类型
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研究性论文 |
ISSN
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1672-2043 |
学科
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环境科学基础理论 |
基金
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国家自然科学基金-广东联合基金
;
广东省自然科学基金
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文献收藏号
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CSCD:3990099
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