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61.
Porous Cu-BTC material was synthesized by the solvothermal method. Powder X-ray diffraction (PXRD) was used to test the phase purity of the synthesized material and investigate its structural stability under the influence of flue gas components. The thermal stability of the material was determined through thermal gravimetric (TG) analysis. Scanning electron microscopy (SEM) was employed to study the microstructure of the material. Cu-BTC was demonstrated not only to have high CO2 adsorption capacity but also good selectivity of CO2 over N2 by means of packed bed tests. The adsorption capacity of Cu-BTC for CO2 was about 69 mL/g at 22°C. The influence of the main flue gas components on the CO2 capacity of the material were discussed as well. 相似文献
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针对分散型生活污水处理开发了气升回流一体化工艺,以校园生活污水为对象,研究其对生活污水中污染物的去除效果。该系统由好氧区、厌氧区、沉淀区和气升室组成,以曝气的剩余气体的气升作用实现混合液的回流,节省动力消耗。结果表明,本工艺对COD、氨氮及悬浮物(SS)有较好的去除效果,去除率分别达到80%、90%和75%左右,出水COD、NH4+-N及SS平均浓度在40 mg/L、6.5 mg/L和10 mg/L左右。当进水COD在100~1 000 mg/L之间波动时,出水水质稳定。该工艺有较强的抗冲击负荷能力,且可实现剩余污泥的自消解。本工艺具有结构紧凑、占地少,运行费用低,维护简单的特点。 相似文献
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首先简单介绍了单轴压缩试验的具体情况。对于拉裂破坏模式,提出了相应的力学计算模型,并建立了抗压强度和抗拉强度的关系式。对于由拉裂面的存在而导致试件最终破坏的计算模型,提出了4种相应的假设。其中,对4种特征的拉裂面建立了抗压强度和抗拉强度的关系式。 相似文献
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X. Qu V.A. Vavilin L. Mazéas M. Lemunier C. Duquennoi P.-J. He T. Bouchez 《Waste management (New York, N.Y.)》2009,29(6):1828-1837
Utilizing stable carbon isotope data to account for aceticlastic and non-aceticlastic pathways of methane generation, a model was created to describe laboratory batch anaerobic decomposition of cellulosic materials (office paper and cardboard). The total organic and inorganic carbon concentrations, methane production volume, and methane and CO2 partial pressure values were used for the model calibration and validation. According to the fluorescent in situ hybridization observations, three groups of methanogens including strictly hydrogenotrophic methanogens, strictly aceticlastic methanogens (Methanosaeta sp.) and Methanosarcina sp., consuming both acetate and H2/H2CO3 as well as acetate-oxidizing syntrophs, were considered. It was shown that temporary inhibition of aceticlastic methanogens by non-ionized volatile fatty acids or acidic pH was responsible for two-step methane production from office paper at 35 °C where during the first and second steps methane was generated mostly from H2/H2CO3 and acetate, respectively. Water saturated and unsaturated cases were tested. According to the model, at the intermediate moisture (150%), much lower methane production occurred because of full-time inhibition of aceticlastic methanogens. At the lowest moisture, methane production was very low because most likely hydrolysis was seriously inhibited. Simulations showed that during cardboard and office paper biodegradation at 55 °C, non-aceticlastic syntrophic oxidation by acetate-oxidizing syntrophs and hydrogenotrophic methanogens were the dominant methanogenic pathways. 相似文献
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Yang Xue Xu Xiaochen Xiang Qingchun Qu Yingdong Ren Yinglei Qiu Keqiang 《Environmental science and pollution research international》2021,28(35):48038-48052
Environmental Science and Pollution Research - Metallic glasses (MGs) with unique disordered atomic stacking structures exhibit excellent catalytic performance in wastewater treatment. The... 相似文献
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We developed the T3-induced Xenopus metamorphosis assay, which is supposed to be able to sensitively detect thyroid hormone(TH) signaling disruption of chemicals. The present study aimed to validate the T3-induced Xenopus metamorphosis assay by re-evaluating the TH signaling antagonism of tetrabromobisphenol A(TBBPA), a known TH signaling disruptor. According to the assay we developed, Xenopus tadpoles at stage 52 were exposed to 10–500 nmol/L TBBPA in the presence of 1 nmol/L T3. After 96 hr of exposure, TBBPA in the range of 10–500 nmol/L was found to significantly inhibit T3-induced morphological changes of Xenopus tadpoles in a concentration-dependent manner in term of body weight and four morphological endpoints including head area(HA), mouth width(MW), unilateral brain width/brain length(ULBW/BL), and hind-limb length/snout-vent length(HLL/SVL).The results show that these endpoints we developed are sensitive for characterizing the antagonistic effects of TBBPA on T3-induced metamorphosis. Following a 24-hr exposure,we found that TBBPA antagonized expression of T3-induced TH-response genes in the tail,which is consistent with previous findings in the intestine. We propose that the tail can be used as an alternative tissue to the intestine for examining molecular endpoints for evaluating TH signaling disruption. In conclusion, our results demonstrate that the T3-induced Xenopus metamorphosis assay we developed is an ideal in vivo assay for detecting TH signaling disruption. 相似文献
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