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Integration of microbial reductive dehalogenation with persulfate activation and oxidation (Bio-RD-PAO

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 2, doi: 10.1007/s11783-021-1457-8

Abstract:

•Bio-RD-PAO can effectively and extensively remove organohalides.

Keywords： Bio-RD-PAO Microbial reductive dehalogenation Persulfate Organohalide respiration Complete attenuation

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Functionalized activated carbon for the adsorptive removal of perchlorate from water solutions

Rovshan MAHMUDOV, Chinglung CHEN, Chin-Pao HUANG

Frontiers of Chemical Science and Engineering 2015, Volume 9, Issue 2, Pages 194-208 doi: 10.1007/s11705-015-1517-3

Abstract: Two types of activated carbon, namely, Filtrasorb 400 and Nuchar SA, were functionalized by quaternary ammonium salts (quats), as to enhance perchlorate adsorption. Results showed that the adsorption of quats on Nuchar SA increased with increase in chain length (hydrophobicity) of quats. Filtrasorb 400, however, had limited uptake of long-chain quats such as dodecyltrimethylammonium and hexadecyltrimethylammoium (HDTMA). Results indicated that perchlorate removal by the functionalized activated carbon was directly related to the chain length of the modifying quats. Perchlorate removal by functionalized activated carbon increased with increase in chain length of the modifying quats and became less pH-dependent. Modified Nuchar SA had higher overall perchlorate removal capacity than the modified Filtrasorb F400, but was more strongly affected by pH than Filtrasorb 400. Activated carbon treated with HDTMA exhibited the best perchlorate removal capacity among all quats studied. Results indicated that tailoring the activated carbon surface with HDTMA rendered the activated carbon surface positively charged, which resulted in substantial increase in perchlorate removal compared to unfunctionalized activated carbons.

Keywords： perchlorate activated carbon removal functionalization quaternary ammonium salts

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Interactions between nano-TiO

Mingyu LIN,Yao Hsiang TSENG,Chin-Pao HUANG

Frontiers of Chemical Science and Engineering 2015, Volume 9, Issue 2, Pages 242-257 doi: 10.1007/s11705-015-1513-7

Abstract: Nano-sized titanium dioxide (nano-TiO ) has wide industrial applications and therefore considerable chances of exposure are created for human beings and ecosystems. To better understand the interactions between nano-TiO and aquatic organisms, we first studied TiO uptake by algae exemplified by were exposed to nano-TiO in a series of concentrations and at various pH. TiO uptake was quantified using a sedimentation curve analysis technique. After exposure of algae to TiO , the variation of zeta potential was measured and the morphology of algae-TiO aggregate was observed with scanning electron microscopy and the optical microscopy. The steady-state TiO uptake was found to be pH-dependent and the isotherms can be described well by Freundlich model. TiO deposited on algal surfaces causes the shift of pH of TiO -covered algae from that of algae toward that of TiO . The attraction between TiO -covered algal cells induces the agglomeration of algae and TiO and thus the formation of algae-TiO aggregates in the size of 12 to 50 μm. The 2-D fractal dimension of the aggregates is pH-dependent and ranges from 1.31 to 1.67. The theoretical analysis of the Gibbs energy of interaction indicates that both TiO uptake by algae and the formation of algae-TiO aggregate are influenced by the interaction between TiO particles.

Keywords： nano-TiO₂ Pseudokirchneriella subcapitata algal cells titanium dioxide uptake

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Influence of welding residual stresses on the ductile crack growth resistance of circumferentially cracked pipe

rd NYHUS, Zhiliang ZHANG

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 3, Pages 217-223 doi: 10.1007/s11709-012-0169-3

Abstract: Welding residual stress is one of the main concerns for fabrication and operation of steel structures due to its potential effect on structural integrity. This paper focuses on the effect of welding residual stress on the ductile crack growth resistance of circumferentially cracked steel pipes. Two-dimensional axi-symmetry model has been used to simulate the pipe. Residual stresses were introduced into the model by using so-called eigenstrain method. The complete Gurson model has been employed to calculate the ductile crack growth resistance. Results show that residual stresses reduce the ductile crack growth resistance. However, the effect of residual stresses on ductile crack growth resistance decreases with the increase of crack growth. The effect of residual stress has also been investigated for cases with different initial void volume fraction, material hardening and crack sizes.

Keywords： residual stress ductile crack growth resistance complete Gurson model eigenstrain method

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Surgical robotics: A look-back of latest advancement and bio-inspired ways to tackle existing challenges

Yang LIU, Jing LIU

Frontiers of Mechanical Engineering 2012, Volume 7, Issue 4, Pages 376-384 doi: 10.1007/s11465-012-0352-1

Abstract: perform an exhaustive evaluation, we would emphasize more on the new insight by digesting the emerging bio-inspiredAs an alternative, bio-inspired methods or materials may shed light on new innovations.

Keywords： minimally invasive surgery surgical robotics haptic feedback miniaturization bio-inspiration bionics

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Bio-based Technologies for Resource Recovery

Aijie Wang, David Stuckey

Frontiers of Environmental Science & Engineering 2018, Volume 12, Issue 4, doi: 10.1007/s11783-018-1079-y

Abstract:

Keywords： valign= top class= J_zhaiyao

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Combustion characteristics and kinetics of bio-oil

Ruixia ZHANG, Zhaoping ZHONG, Yaji HUANG

Frontiers of Chemical Science and Engineering 2009, Volume 3, Issue 2, Pages 119-124 doi: 10.1007/s11705-009-0068-x

Abstract: The combustion characteristics of bio-oils derived from rice husk and corn were studied by thermogravimetryin air and nitrogen atmosphere, we analyzed the combustion characteristics of different kinds of bio-oilsin different atmospheres and worked out the combustion kinetics parameters of the bio-oil, providingreliable base data for the burning of bio-oil.The thermogravimetry indicated that the combustion process of bio-oil was divided into three stages.

Keywords： bio-oil combustion characteristics combustion kinetics

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Prospect and Technology Progress of Bio-diesel Industry

Ji Xing,Xi Xiaolin,Kong Linhe,Li Junfeng,Li Li

Strategic Study of CAE 2002, Volume 4, Issue 9, Pages 86-93

Abstract:

The current situation of research, application and development of bio-diesel industry all over theworld is reviewed in this article, and the problem in the preparation and application of bio-dieselThe importance of bio-diesel industry to the national petroleum supply, national economy and re-adjustmentThe prospect and development pattern of bio-diesel industry in China are pointed out as well.

Keywords： bio-diesel bio-diesel preparation bio-diesel industry

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Production of renewable fuels by blending bio-oil with alcohols and upgrading under supercritical conditions

Sainab Omar, Suzanne Alsamaq, Yang Yang, Jiawei Wang

Frontiers of Chemical Science and Engineering 2019, Volume 13, Issue 4, Pages 702-717 doi: 10.1007/s11705-019-1861-9

Abstract: The work studied a non-catalytic upgrading of fast pyrolysis bio-oil by blending under supercriticalCharacterisation of the bio-oil and the upgraded bio-oils was carried out including moisture content,The GCMS analysis indicated that the supercritical methanol reaction removed the acids in the bio-oilconsequently the pH increased from 2.39 in the crude bio-oil to 4.04 after the supercritical methanolthe O content and increasing the heating value to 27.55 from 17.51 MJ·kg in the crude bio-oil.

Keywords： bio-oil blending supercritical upgrading characterisation

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volatile organic sulfur compounds in off-gas mixture from a wastewater treatment plant using a two-stage bio-trickling

Shihao Sun, Tipei Jia, Kaiqi Chen, Yongzhen Peng, Liang Zhang

Frontiers of Environmental Science & Engineering 2019, Volume 13, Issue 4, doi: 10.1007/s11783-019-1148-x

Abstract:

A two-stage BTF system was established treating odorous off-gas mixture from a WWTP.

The two-stage BTF system showed resistance for the lifting load of H₂S and VOSC.

Miseq Illumina sequencing showed separated functional microbial community in BTFs.

Avoiding H₂S inhibition and enhancement of VOSC degradation was achieved.

Key control point was discussed to help industrial application of the system.

Keywords： Odor Two-stage bio-trickling filter process Bio-trickling filter Hydrogen sulfide Volatile organic sulfur

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A review on catalytic & non-catalytic bio-oil upgrading in supercritical fluids

Sainab Omar, Yang Yang, Jiawei Wang

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 1, Pages 4-17 doi: 10.1007/s11705-020-1933-x

Abstract: This review article summarizes the key published research on the topic of bio-oil upgrading using catalyticThe precious metal catalysts Pd, Ru and Pt on various supports are frequently chosen for catalytic bio-oilesterification, which leads to improvements in liquid yield, heating value, and pH of the upgraded bio-oilOn the other hand, SCFs have been effectively used to upgrade crude bio-oil without a catalyst.

Keywords： bio-oil upgrading supercritical review

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Electrospun porous carbon nanofibers derived from bio-based phenolic resins as free-standing electrodes

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 5, Pages 504-515 doi: 10.1007/s11705-022-2260-1

Abstract: Hence, lignin, phenol, and furfural were used to synthesize bio-based phenolic resins, and the activatedThese results confirm that the activated carbon nanofiber from bio-based phenolic resins can be applied

Keywords： lignin bio-based phenolic resins electrospinning activated carbon nanofibers supercapacitors

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Characterization of humic substances in bio-treated municipal solid waste landfill leachate

Guangxia QI, Dongbei YUE, Yongfeng NIE

Frontiers of Environmental Science & Engineering 2012, Volume 6, Issue 5, Pages 711-716 doi: 10.1007/s11783-012-0421-z

Abstract: Humic substances (HSs) dominate the organic matter in bio-treated landfill leachate.

Keywords： bio-treated landfill leachate humic substances elemental analysis spectroscopic characteristics

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SERS nanoprobes for bio-application

Han-Wen Cheng,Jin Luo,Chuan-Jian Zhong

Frontiers of Chemical Science and Engineering 2015, Volume 9, Issue 4, Pages 428-441 doi: 10.1007/s11705-015-1536-0

Abstract: size, shape, composition and surface properties impart nanoparticles with the desired functions for bio-applicationexploration of metal (e.g., gold and silver) nanoparticles, especially those with magnetic properties and bio-conjugated

Keywords： surface-enhanced Raman scattering functional nanoprobes bio-conjugation metal nanoparticles magnetic

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Combustion and emissions of the diesel engine using bio-diesel fuel

YUAN Yinnan, MEI Deqing, WANG Zhong, ZHANG Tian

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 2, Pages 189-192 doi: 10.1007/s11465-008-0021-6

Abstract: The combustion and heat release of engines using diesel fuel and bio-diesel fuel have been investigatedThe economic performance and emission features of diesel engines using diesel fuel and bio-diesel fuelThe results also show that the specific fuel consumption of bio-diesel increases by about 12% .The emissions

Keywords： advance combustion consumption economic performance combustion duration