搜索结果: 1-15 共查到“地质学 Ammonium”相关记录27条 . 查询时间(0.717 秒)
Fast removal of ammonium ion using a hydrogel optimized with response surface methodology
Adsorption Ammonium ion Box–Behnken design Hydrogel Response surface methodology
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2011/12/14
Response surface methodology (RSM) based on a three-level, three-variable, Box–Behnken design (BBD) was used to optimize the preparation parameters of a hydrogel consisted of polyvinyl alcohol (PVA),a...
Thermoanalytical studies of natural potassium, sodium and ammonium alunites
Alunite thermal analysis, Controlled rate thermal analysis, Dehydration, Dehydroxylation
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2011/11/10
Dynamic and controlled rate thermal analysis (CRTA) has been used to characterise alunites of formula [M(Al)3(SO4)2(OH)6] where M+ is the cations K+, Na+ or NH4 +. Thermal decomposition occurs in a se...
Fast removal of ammonium nitrogen from aqueous solution using chitosan-g-poly(acrylic acid)/attapulgite composite
Ammonium nitrogen Composite adsorbent Kinetics Isotherms Adsorption mechanism
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2011/10/10
In thiswork, a novelcomposite adsorbent with three-dimensional cross-linked polymeric networks based on chitosan (CTS) and attapulgite (APT) was prepared via in situ copolymerization in aqueous soluti...
Fast removal of ammonium nitrogen from aqueous solution using chitosan-g-poly(acrylic acid)/attapulgite composite
Ammonium nitrogen Composite adsorbent Kinetics Isotherms Adsorption mechanism
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2011/12/14
In thiswork, a novelcomposite adsorbent with three-dimensional cross-linked polymeric networks based on chitosan (CTS) and attapulgite (APT) was prepared via in situ copolymerization in aqueous soluti...
Characterization of the thermal degradation and heat of combustion of Pinus halepensis needles treated with ammonium-polyphosphate-based retardants
Bomb calorimeter Char Forest fires Heat of combustion Long-term retardants Thermal analysis Volatiles
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2011/11/10
Abstract The thermal degradation behavior of P. halepensis needles treated with two ammonium-polyphosphate-based commercial retardants was studied using thermal analysis (DTG) under nitrogen atmosphe...
Evaluation of ammonium removal using a chitosan-g-poly (acrylic acid)/rectorite hydrogel composite
Ammonium Hydrogel composite Fast-responsive High-capacity Regeneration
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2011/12/14
This paper concerns the removal of ammonium ions (NH4+) from aqueous solution using a hydrogel composite chitosan graftedpoly (acrylic acid)/rectoritepreparedfromin situ copolymerization. The effects ...
Stable isotopic detection of ammonium and nitrate assimilation by phytoplankton in the Waquoit Bay estuarine system
Stable isotopic detection ammonium and nitrate assimilation phytoplankton Waquoit Bay estuarine system
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2014/4/22
We measured concentration and δ15N of chlorophyll a (Chl a), NO3-, and NH4+ along a salinity gradient in Childs River, Massachusetts, in winter, spring, and summer. We used the δ15N of Chl a as a prox...
Solid-liquid phase equilibria of binary salt hydrate mixtures involving ammonium alum
phase diagrams aluminum salts differential drop calorimetry salts hydrates
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2011/11/10
Summary The solid-liquid phase diagrams of binary mixtures of ammonium alum with ammonium iron(III) alum, with aluminum nitrate nonahydrate and with ammonium nitrate and of aluminum sulfate hexadecahy...
Cation-Exchange Capacity (CEC) of Zeolitic Volcaniclastic Materials: Applicability of the Ammonium Acetate Saturation (AMAS) Method
Ammonium Acetate Saturation (AMAS) Method Ammonia Electrode Cation-Exchange Capacity (CEC) Clinoptilolite Greece Kjeldahl Ammonia Distillation
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2011/12/7
Abstract: The ammonium acetate saturation (AMAS) method was used to study the cation-exchange capacity (CEC) of zeolitic volcaniclastic materials from Santorini and Polyegos Islands, Greece. The AMAS ...
Hydrothermal synthesis of ammonium illite
Hydrothermal synthesis ammonium illite
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2012/3/30
Synthetic gel and glass of illitic composition, natural kaolinite, and mixed-layer illite-smectite were used as starting materials for hydrothermal synthesis of ammonium illite.Ammonium illite was pre...
Hydrothermal Crystallization of Ammonium-Saponite at 200C and Autogenous Water Pressure
Cation Exchange Capacity Saponite Synthesis X-ray Diffraction X-ray Fluorescence
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2011/12/1
Abstract: The effects of reaction time (2 to 72 h) and NH4+/Al3+ molar ratio (1.6, 2.4 and 3.2) on the hydrothermal synthesis of ammonium-saponites are investigated. The gels are obtained by mixing po...
Determination of the content and distribution of fixed ammonium in illite-smectite by X-ray diffraction: Application to North Sea illite-smectite
Determination content distribution fixed ammonium illite-smectite X-ray diffraction Application North Sea illite-smectite
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2012/4/1
A new X-ray diffraction method for the determination of the amount and distribution
of fixed NHt in illite-smectite has been developed. Illite-smectite was saturated with K+
and heated at ISO !aC Th...
Development of Ammonium-Saponites from Gels with Variable Ammonium Concentration and Water Content at Low Temperatures
Cation exchange capacity Infrared spectroscopy Saponite Synthesis Thermal analysis Transmission electron microscopy X-ray powder diffraction
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2011/12/1
Abstract: Ammonium-saponite is hydrothermally grown at temperatures below 300°C from a gel with an overall composition corresponding to (NH4)0.6Mg3Si3.4Al0.6O10(OH)2. The synthetic saponite and co-exi...
Ammonium Substitution in Illite During Maturation of Organic Matter
Ammonium substitution ?Fixed-ammonium ?Hydrocarbon generation ?Illite/smectite transformation ?Organic maturation
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2012/1/4
Pierre shale samples from a thin stratigraphic zone within the contact aureole of the lamprophyric Walsen dike record changes due to thermal effects that are not influenced by detrital differences. An...
Characteristics of Products from the Acid Ammonium Oxalate Treatment of Manganese Minerals
Acid ammonium oxalate Dissolution Grinding Manganese oxides Surface area X-ray powder diffraction
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2011/12/31
To determine the parameters that control the attack of Mn minerals by acid ammonium oxalate in darkness (AAOD), rhodochrosite, pyrolusite, manganosite, hausmannite, and bixbyite were shaken with AAOD ...