scholarly journals Removal of hydrogen sulfide gas using coal fly ash – blast furnace cement composite

2021 ◽  
Author(s):  
Satoshi Asaoka ◽  
Hiroyuki Saito ◽  
Tsuyoshi Ichinari ◽  
Shinjiro Hayakawa ◽  
Takahito Oikawa
Keyword(s):  
Blast Furnace ◽  
Hydrogen Sulfide ◽  
Fly Ash ◽  
Coal Fly Ash ◽  
Domestic Wastewater ◽  
Cement Composite ◽  
Pilot Scale ◽  
Service Industries ◽  
Gas Removal ◽  
Blast Furnace Cement

Abstract The number of complaints regarding offensive odors from service industries, such as restaurants and garages, has recently increased. In this study, we aimed to develop an adsorbent for hydrogen sulfide gas derived from domestic wastewater and reveal the mechanisms of its removal. The adsorbent used for hydrogen sulfide gas removal was prepared by mixing coal fly ash and blast furnace cement with a mixing ratio of 87:13 by mass percentage. The optimum calcination temperature of the adsorbent was 700 °C to achieve a high removal performance for both dry and humid hydrogen sulfide gas. The X-ray absorption fine structure analysis revealed that hydrogen sulfide was removed on the adsorbent by oxidizing to sulfate. A pilot-scale experiment was conducted to evaluate the removal performance of hydrogen sulfide gas derived from domestic wastewater using the developed adsorbent. For a week, the average removal percentage of hydrogen sulfide gas derived from domestic wastewater remained at 99.1%. Therefore, the developed adsorbent for hydrogen sulfide gas is promising and cost-effective for promoting the recycling of coal fly ash.

scholarly journals Optimum reaction ratio of coal fly ash to blast furnace cement for effective removal of hydrogen sulfide

Chemosphere ◽  
2017 ◽  
Vol 168 ◽  
pp. 384-389 ◽  
Author(s):  
Satoshi Asaoka ◽  
Hideo Okamura ◽  
Kyunghoi Kim ◽  
Yuzuru Hatanaka ◽  
Kenji Nakamoto ◽  
...  
Keyword(s):  
Blast Furnace ◽  
Hydrogen Sulfide ◽  
Fly Ash ◽  
Coal Fly Ash ◽  
Reaction Ratio ◽  
Effective Removal ◽  
Optimum Reaction ◽  
Blast Furnace Cement

Adsorption of phosphate onto lanthanum-doped coal fly ash—Blast furnace cement composite

2021 ◽  
Vol 406 ◽  
pp. 124780
Author(s):  
Satoshi Asaoka ◽  
Kohei Kawakami ◽  
Hiroyuki Saito ◽  
Tsuyoshi Ichinari ◽  
Hideaki Nohara ◽  
...  
Keyword(s):  
Blast Furnace ◽  
Fly Ash ◽  
Coal Fly Ash ◽  
Cement Composite ◽  
Blast Furnace Cement

Influence of biomass fly ash additive on blast-furnace cement hydration and hardening

2017 ◽  
Vol 29 (8) ◽  
pp. 313-321
Author(s):  
Rimvydas Kaminskas ◽  
Vytautas Cesnauskas ◽  
Raimonda Kubiliute
Keyword(s):  
Blast Furnace ◽  
Fly Ash ◽  
Cement Hydration ◽  
Biomass Fly Ash ◽  
Blast Furnace Cement

scholarly journals Preliminary Study on Additives for Controlling As, Se, B, and F Leaching from Coal Fly Ash

Minerals ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 493 ◽  
Author(s):  
Farrah Hanum ◽  
Erda Desfitri ◽  
Yukio Hayakawa ◽  
Shinji Kambara
Keyword(s):  
Trace Elements ◽  
Blast Furnace ◽  
Coal Fly Ash ◽  
Paper Sludge ◽  
Fly Ashes ◽  
Coal Fly Ashes ◽  
Paper Sludge Ash ◽  
Preliminary Study ◽  
Sludge Ash ◽  
Blast Furnace Cement

The application of paper sludge ash as an additive in controlling the leaching of trace elements has been satisfactorily effective to date. Previous studies have found that paper sludge ash has a promising effect in controlling the leaching of arsenic, selenium and boron. The content of calcium oxide in paper sludge ash is believed to be one of the important factors in decreasing the concentration of trace elements in leachate. Therefore, this study aimed to verify the effect of paper sludge ash in the leaching process and to propose an effective and applicable suppressing material that can control the leaching of As, Se, B and F simultaneously. In light of this aim, Ca(OH)2, PS ash 8 and blast furnace cement (BF cement) were tested as single and mixed additives in two different coal fly ashes (FA C and FA H). The results indicate that the application of a mixture of additives is necessary to control the leaching of trace elements. A mixture of PS ash 8, Ca(OH)2 and blast furnace cement (BF cement) was proposed to be an applicable and suitable additive that could suppress arsenic, selenium, boron, and fluorine leaching simultaneously.

Sorption of Se(IV) and Se(VI) to coal fly ash/cement composite: Effect of Ca2+ and high ionic strength

2017 ◽  
Vol 464 ◽  
pp. 76-83 ◽  
Author(s):  
Weiling Sun ◽  
Jay E. Renew ◽  
Wenlong Zhang ◽  
Yuanzhi Tang ◽  
Ching-Hua Huang
Keyword(s):  
Fly Ash ◽  
Ionic Strength ◽  
Coal Fly Ash ◽  
Cement Composite ◽  
High Ionic Strength ◽  
Composite Effect
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