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elemental mercury 2

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Predicting the elemental compositions of solid waste using ATR-FTIR and machine learning

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 10, doi: 10.1007/s11783-023-1721-1

Abstract:

● A method based on ATR-FTIR and ML was developed to predict CHNS contents in waste.

Keywords： Elemental composition Infrared spectroscopy Machine learning Moisture interference Solid waste Spectral

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Removal of elemental mercury by KI-impregnated clay

Boxiong SHEN,Jianhong CHEN,Ji CAI

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 2, Pages 236-243 doi: 10.1007/s11783-014-0765-7

Abstract: This study described the use of clay impregnated by KI in gas phase elemental mercury (Hg ) removal in

Keywords： clay elemental mercury removal efficiency potassium iodide mechanism

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Removal of elemental mercury with Mn/Mo/Ru/Al

Yongfu GUO, Naiqiang YAN, Ping LIU, Shijian YANG, Juan WANG, Zan QU

Frontiers of Environmental Science & Engineering 2013, Volume 7, Issue 3, Pages 464-473 doi: 10.1007/s11783-012-0430-y

Abstract: In this work, a catalytic membrane using Mn/Mo/Ru/Al O as the catalyst was employed to remove elemental

Keywords： flue gas elemental mercury membrane catalysis transition metal

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Rapid alloying of CoCrFeMnNi high-entropy alloy from elemental feedstock toward high-throughput synthesis

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 1, doi: 10.1007/s11465-022-0727-x

Abstract: powder bed fusion (L-PBF) is adopted for the in situ synthesis of equiatomic CoCrFeMnNi HEA from elementalX-ray diffraction indicates that HEA microstructure can be obtained from elemental powders via L-PBF.

Keywords： laser powder bed fusion (L-PBF) in situ alloying high-entropy alloys heat treatment rapid synthesis

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Mercury enrichment in

Chunhao Dai, Pufeng Qin, Zhangwei Wang, Jian Chen, Xianshan Zhang, Si Luo

Frontiers of Environmental Science & Engineering 2017, Volume 11, Issue 1, doi: 10.1007/s11783-017-0892-z

Abstract: Mercury enrichment in response to elevated atmospheric mercury concentrations in the organs of rape ( ) was investigated. Elevated soil mercury content had significant impact on mercury accumulation in rape stems, roots, seeds and seed coats. Leaf mercury in the leaves was mostly affected by atmospheric input while the stems were mostly affected by soil concentrations. Mercury in the aboveground plant tissue mainly derived from atmospheric absorption, and atmospheric mercury absorption in leaves was higher than that in the stems. Mercury enrichment in response to elevated atmospheric mercury concentrations in the organs of rape ( ) was investigated using an open top chamber fumigation experiment and a soil mercury enriched cultivation experiment. Results indicate that the mercury concentration in leaves and stems showed a significant variation under different concentrations of mercury in atmospheric and soil experiments while the concentration of mercury in roots, seeds and seed coats showed no significant variation under different atmospheric mercury concentrations. Using the function relation established by the experiment, results for atmospheric mercury sources in rape field biomass showed that atmospheric sources accounted for at least 81.81% of mercury in rape leaves and 32.29% of mercury in the stems. Therefore, mercury in the aboveground biomass predominantly derives from the absorption of atmospheric mercury.

Keywords： Open top chamber Gaseous elemental mercury (GEM) Soil Mercury Brassica napus

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New insights into mercury removal mechanism on CeO

Ling Li, Yu He, Xia Lu

Frontiers of Environmental Science & Engineering 2018, Volume 12, Issue 2, doi: 10.1007/s11783-018-1007-1

Abstract: First-principles calculations were performed to investigate the mechanism of Hg adsorption and oxidation on CeO (111). Surface oxygen activated by the reduction of Ce to Ce was vital to Hg adsorption and oxidation processes. Hg was fully oxidized by the surface lattice oxygen on CeO (111), without using any other oxidizing agents. HCl could dissociate and react with the Hg adatom on CeO (111) to form adsorbed Hg–Cl or Cl–Hg–Cl groups, which promoted the desorption of oxidized Hg and prevented CeO catalyst deactivation. In contrast, O–H and H–O–H groups formed during HCl adsorption consumed the active surface oxygen and prohibited Hg oxidation. The consumed surface oxygen was replenished by adding O into the flue gas. We proposed that oxidized Hg desorption and maintenance of sufficient active surface oxygen were the rate-determining steps of Hg removal on CeO -based catalysts. We believe that our thorough understanding and new insights into the mechanism of the Hg removal process will help provide guidelines for developing novel CeO -based catalysts and enhance the Hg removal efficiency.

Keywords： Elemental mercury removal Surface adsorption Ceria First-principles calculations

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Synthesis and thermosensitive behavior of dextran graft copolymers containing poly (N-vinylcaprolactam) side chains

SHI Huangying, CHEN Wenjuan, ZHANG Liming

Frontiers of Chemical Science and Engineering 2007, Volume 1, Issue 1, Pages 72-75 doi: 10.1007/s11705-007-0015-7

Abstract: Their composition and structure were investigated by elemental analyses, infrared spectra and thermogravimetric

Keywords： transmittance copolymer concentration LCST temperature elemental

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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: this study, the HSs from landfill leachate treated by membrane bioreactor (MBR-HSs) were analyzed via elemental

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

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Effects of a diesel oxidation catalyst on gaseous pollutants and fine particles from an engine operating on diesel and biodiesel

Xiaoyan SHI, Kebin HE, Weiwei SONG, Xingtong WANG, Jihua TAN

Frontiers of Environmental Science & Engineering 2012, Volume 6, Issue 4, Pages 463-469 doi: 10.1007/s11783-011-0317-3

Abstract: Special attention was focused on the effects of the DOC on elemental carbon (EC) and organic carbon (

Keywords： diesel oxidation catalyst (DOC) diesel particulate matters elemental carbon (EC) organic carbon (OC)

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Semi-industrial Tests of Pressure Leaching on High-iron Sphalerite Concentrate

Wang Jikun,Zhou Tingxi,Wu Jinmei

Strategic Study of CAE 2005, Volume 7, Issue 1, Pages 60-64

Abstract: The yield of elemental sulphur was 93 % . The residual acid in the leachate was 3.95 g/L.Leaching rate of zinc and iron was 98.09 % and 37.88 % respectively, and the yield of elemental sulphur

Keywords： high-iron sphalerite pressure leaching semi-industrial tests elemental sulphur