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311.
312.
Jiajun Liu Long Wang Yun Zhu Che-Jen Lin Carey Jang Shuxiao Wang Jia Xing Bin Yu Hui Xu Yuzhou Pan 《Frontiers of Environmental Science & Engineering》2019,13(1):2
313.
Zhang Xiuxiu Yi Guiyun Zhang Zhengting Yu Jia Fan Haiyang Li Peng Zeng Huihui Xing Baolin Chen Lunjian Zhang Chuanxiang 《Environmental science and pollution research international》2021,28(12):14671-14680
Environmental Science and Pollution Research - Due to the merits of their high adsorption and convenient separation, magnetic graphene-based composites have become a promising adsorbent in terms of... 相似文献
314.
Wang Shengli Yan Linlin Guan Xiaohui Jia Yanping Song Lianfa Zhang Haifeng 《Environmental Chemistry Letters》2019,17(4):1831-1837
Environmental Chemistry Letters - Hydroxyl radicals are commonly produced either by metal activation or by using external energy. However, the application of these methods is limited by low working... 相似文献
315.
在气相色谱和色谱-质谱分析的基础上,对以六六六为原料生产多氯苯的两种工艺的产品及废渣进行了分析。结果表明:伴随多氯苯的生成,尚有多种氯化物产生。在水解生产工艺中,产品和废渣中有微量PCDDs和PCDFs,但产品中还有少量PCBs。在热解工艺中,废渣内发现大量的PCBs,PCDDs和PCDFs,最毒的异构体,2,3,7,8-TCDD含量高达24ppm。 相似文献
316.
本文以煤气化工程的典型实例分析为基础,通过对气源厂经济效益的分析,提出了以气化替煤量和节煤量两项指标,进行宏观经济效益、社会效益和环境效益的综合效益分析的步骤及相应的计算公式与方法。 相似文献
317.
鲤鱼对三种硝基芳族化合物的摄取、释放和生物富集 总被引:7,自引:0,他引:7
用第二松花江水和鱼体中多次检出的三种硝基芳族化合物来分别测定鲤鱼体中的生物富集系数(BCF),摄取和释放动力学参数,以及在肌肉、肠、肝和鳃等组织中的分布。试验在半静态条件下进行。硝基芳族化合物在鲤鱼体内的释放可用双区一级动力学模型很好地描述。鲤鱼对2,4-二硝基甲苯和对硝基氯苯的富集过程中发现有未知的代谢产物生成。 相似文献
318.
本文对丙烯腈-甲基丙烯酸甲酯二元共聚物(PAN)超滤膜的成膜过程及膜分离性能进行了研究。结果表明:由PAN-双溶剂-酯类铸膜液制成的超滤膜对牛血清蛋白的截留率(R)为97.62%,通量(f)为84.96ml/cm~2.h.通过电子显微镜扫描观察膜底、表层以及膜断面的结构,对膜的形成机理与膜分离性能进行了研究,证明PAN是一种性能良好的新型膜材料,用PAN二元共聚物超滤膜对α-粉酶进行超滤浓缩试验,取得了较好的结果。 相似文献
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Bacterial isolates from multi-species biofilms were identified by 16S rDNA gene sequences and investigated for their inductive
effects as monospecific biofilms on larval metamorphosis of Mytilus galloprovincialis. Alteromonas sp. 1 biofilm was found to have inductive activity, which increased with increasing cell density. The cue(s) of Alteromonas sp. 1 biofilm responsible for inducing larval metamorphosis was further investigated. Treatment of the biofilm with formalin,
ethanol, heat or ultraviolet irradiation resulted in a significant reduction in the inductive activity of Alteromonas sp. 1, and the crude extract of surface-bound products of the biofilm showed no activity. These results indicated that if
the cue was a surface-bound chemical cue, it was unstable, or susceptible to the treatments or the extraction process. On
the other hand, the inductive activity of treated biofilms had a linear regression to the cell survival of bacteria, indicating
a metabolically active biofilm was a requirement for larval metamorphosis. Conditioned water of the biofilm did not induce
larvae to metamorphose. However, larval crawling behavior in the conditioned water was the same as that in the biofilm prior
to larval metamorphosis, and significantly different to larval behavior in seawater. This indicated that a potential or partial
waterborne cue existed, but remained inactive when alone. A synergistic effect of the conditioned water with formalin-fixed
Alteromonas sp. 1 biofilm resulted in a significant increase in larval metamorphosis. Heat treatment and fractionation of the conditioned
water demonstrated that the waterborne cue was heat-stable and <3,000 Da in molecular weight. Platinum-coating, Lentil Lectin
and Wheat Germ Agglutinin treatments of the formalin-fixed biofilm significantly reduced its synergistic effect with the conditioned
water, suggesting that a surface-bound cue was present on the biofilm and that the cue might be associated with the bacterial
exopolysaccharide or glycoprotein. Evidence presented here suggests that two chemical cues derived from bacteria act synergistically
on larval metamorphosis of Mytilus galloprovincialis. 相似文献