scholarly journals Hydrothermal Synthesis of Sodalite on Alkali-Activated Coal Fly Ash for Removal of Lead Ions

2016 ◽  
Vol 31 ◽  
pp. 605-614 ◽  
Author(s):  
Jie Luo ◽  
Haijun Zhang ◽  
Jian Yang
Keyword(s):  
Fly Ash ◽  
Hydrothermal Synthesis ◽  
Coal Fly Ash ◽  
Lead Ions ◽  
Activated Coal ◽  
Alkali Activated

Preparation of sintered foam materials by alkali-activated coal fly ash

2010 ◽  
Vol 174 (1-3) ◽  
pp. 108-112 ◽  
Author(s):  
Yelong Zhao ◽  
Junwei Ye ◽  
Xiaobin Lu ◽  
Mangang Liu ◽  
Yuan Lin ◽  
...  
Keyword(s):  
Fly Ash ◽  
Coal Fly Ash ◽  
Activated Coal ◽  
Alkali Activated

scholarly journals Microstructural and Mineralogical Properties of Acid and Alkali Activated Coal Fly Ash

2019 ◽  
Vol 5 (1) ◽  
pp. 612-614 ◽  
Author(s):  
Bijoy Kumar Mondal ◽  
Md. Nurul Islam ◽  
Md. Emdad Hossain ◽  
Md. Nurul Abser
Keyword(s):  
Fly Ash ◽  
Coal Fly Ash ◽  
Mineralogical Properties ◽  
Activated Coal ◽  
Alkali Activated

scholarly journals Physical Property of Potassium-chabazite Obtained by Alkali Hydrothermal Synthesis from Coal Fly Ash

2003 ◽  
Vol 119 (3) ◽  
pp. 125-129 ◽  
Author(s):  
Norihiro MURAYAMA ◽  
Mitsuaki TANABE ◽  
Shinsuke YOSHIDA ◽  
Hideki YAMAMOTO ◽  
Junji SHIBATA
Keyword(s):  
Fly Ash ◽  
Hydrothermal Synthesis ◽  
Coal Fly Ash ◽  
Physical Property

Supercritical hydrothermal synthesis of zeolites from coal fly ash for mercury removal from coal derived gas

2015 ◽  
Vol 136 ◽  
pp. 96-105 ◽  
Author(s):  
Jiancheng Wang ◽  
Dekui Li ◽  
Fenglong Ju ◽  
Lina Han ◽  
Liping Chang ◽  
...  
Keyword(s):  
Fly Ash ◽  
Hydrothermal Synthesis ◽  
Coal Fly Ash ◽  
Mercury Removal ◽  
Supercritical Hydrothermal Synthesis

Adsorption of Pb(II) from Aqueous Solutions on Dithizone-Immobilized Coal Fly Ash

2020 ◽  
Vol 840 ◽  
pp. 57-63
Author(s):  
Dina Fitriana ◽  
Mudasir Mudasir ◽  
Dwi Siswanta
Keyword(s):  
Fly Ash ◽  
Adsorption Isotherm ◽  
Contact Time ◽  
Coal Fly Ash ◽  
Order Kinetic ◽  
Adsorbent Dosage ◽  
Activated Coal ◽  
Concentration Of Ions ◽  
Order Kinetic Model ◽  
Pseudo Second Order

Adsorption of Pb(II) ions onto selective adsorbent of dithizone-immobilized coal fly ash (DCFA) from Holcim, Cilacap, Indonesia has been investigated in batch experiments. Prepared coal fly ash (CFA) modified by immobilization of dithizone previously were characterized by FT-IR and XRD. Several parameters influencing the adsorption of Pb(II) ions such as effect of pH, adsorbent dosage, contact time and initial concentration of ions on the efficiency of the adsorption were studied. The optimum condition of Pb(II) adsorption was found at pH 5, adsorbent dosage 0.1 g, contact time 60 min and initial Pb(II) ions concentration of 60 mg L–1. The adsorption kinetics of Pb(II) ions on DCFA was found to follow a pseudo-second-order kinetic model. The adsorption isotherm data were fitted to the Langmuir model. Kinetics and adsorption isotherm studies suggest that the capacity and affinity of the DCFA in adsorbing Pb(II) ions is significantly improved compared to those of non-immobilized activated coal fly ash (ACFA).

Possibilities of Using Alternative Materials as a Substitute Binder or Filler into Composites

2015 ◽  
Vol 1105 ◽  
pp. 31-35 ◽  
Author(s):  
Nadežda Števulová ◽  
Ivana Schwarzova ◽  
Viola Hospodarova ◽  
Jozef Junak ◽  
Marcela Ondova ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Coal Fly Ash ◽  
Steel Slag ◽  
Recycled Concrete ◽  
Partial Replacement ◽  
Alternative Materials ◽  
Activated Coal ◽  
Hemp Fibres ◽  
Lightweight Composites

This article reports on the possibilities of using selected alternative materials like hemp fibres, MgO-cement, recycled concrete, fly ash and steel slag as binder or filler replacement in composite materials in civil engineering production. These binder or filler substitutes were mixed into composites and their compressive strength was tested. The paper is divided into four parts providing the results of experiments. In first part strength parameters of lightweight composites based on natural fibres (hemp hurds) and alternative binder (MgO-cement) are presented. Compressive strength values of concrete samples with partial replacement of cement with mechanochemically activated coal fly ash are given. The third and forth part is aimed to utilization of recycled concrete and steel slag as a natural aggregate replacement in concrete mixture for purpose of structural concrete and surface roads.

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