The Progress of the Preparation of Coagulant from Industrial Wastes

2012 ◽  
Vol 253-255 ◽  
pp. 931-934
Author(s):  
Ning Suo ◽  
Yan Zhen Yu ◽  
Hua Dong Zhang ◽  
Miao Wan Li ◽  
Yu Xing Zhou ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Fly Ash ◽  
Red Mud ◽  
Coal Gangue ◽  
Industrial Wastes ◽  
Research Progress ◽  
Pyrite Cinder ◽  
Existing Problems

An overview of characteristics and existence status of industrial wastes such as fly ash, coal gangue, red mud and pyrite cinder. The research progress of the preparation of wastewater treatment coagulants from industrial wastes has been introduced in detail. And some existing problems of the preparation of coagulants from industrial wastes have been pointed out, the solutions have been put forward.

Synthesis and characterization of geopolymers derived from coal gangue, fly ash and red mud

2019 ◽  
Vol 206 ◽  
pp. 287-296 ◽  
Author(s):  
Nevin Koshy ◽  
Kunga Dondrob ◽  
Liming Hu ◽  
Qingbo Wen ◽  
Jay N. Meegoda
Keyword(s):  
Fly Ash ◽  
Red Mud ◽  
Coal Gangue ◽  
Synthesis And Characterization

A critical review on tribological properties, thermal behavior, and different applications of industrial waste reinforcement for composites

2020 ◽  
pp. 146442072097243 ◽  
Author(s):  
Swati Gangwar ◽  
Vimal Kumar Pathak
Keyword(s):  
Fly Ash ◽  
Red Mud ◽  
Industrial Waste ◽  
Hybrid Composites ◽  
Industrial Wastes ◽  
Reinforced Composites ◽  
Manufacturing Costs ◽  
Comprehensive Review ◽  
Marble Dust ◽  
Future Potential

Industrial wastes such as marble dust, fly ash, and red mud have progressed as an environmental hazard that needs to be disposed or utilized for minimizing the ecological pollution problems and manufacturing costs. Over the years, there is an increasing interest among researchers in utilizing these industrial wastes as reinforcement for developing economic and lightweight monolithic or hybrid composites. In the same context, this paper presents a comprehensive review on the aspects of tribology and thermal performance of industrial waste such as marble dust, fly ash, and red mud as reinforcement for different monolithic and hybrid composites. The review also describes different applications for industrial waste material reinforced composites. Finally, the paper concludes with authors’ perspective of the review, conclusion summary, and future potential of industrial waste filled composites in different industries for obtaining a sustainable and cleaner environment.

Synthesis of Fly Ash-Based Zeolite and its Research Progress in Wastewater Treatment

2021 ◽  
Vol 1036 ◽  
pp. 277-287
Author(s):  
Xin Yu Li ◽  
Dong Dong Guan ◽  
Jing Zhe Xu ◽  
Nan Zhe Jiang
Keyword(s):  
Wastewater Treatment ◽  
Fly Ash ◽  
Synthesis Method ◽  
Value Added ◽  
Development Trend ◽  
Raw Material ◽  
Research Progress ◽  
Wastewater Pollution ◽  
Scientific Significance ◽  
The Development Trend

Fly ash is the most common solid waste in the industry, and its high value-added utilization has become a hot issue of study. Carrying out the green synthesis route of zeolite as the raw material of fly ash has become an extremely important scientific significance and practical value. In this paper, the research progress of fly ash-based zeolite was introduced from three aspects, including fly ash activation method, fly ash-based zeolite synthesis method and fly ash-based zeolite in the wastewater treatment sector. The relevant applications of fly ash-based zeolite as an adsorbent material in the treatment of wastewater pollution were summarized, and the development trend has prospected.

scholarly journals Preparation of Imitation Basalt Compound Based on Thermodynamic Calculation

Materials ◽  
2019 ◽  
Vol 12 (20) ◽  
pp. 3458 ◽  
Author(s):  
Shaohan Wang ◽  
Xian Luo ◽  
Huixin Jin
Keyword(s):  
Fly Ash ◽  
Red Mud ◽  
Thermodynamic Calculation ◽  
High Performance ◽  
Raw Materials ◽  
Characteristic Temperature ◽  
Basalt Fiber ◽  
Coal Gangue ◽  
Thermodynamic Calculations ◽  
Crystallization Ability

In this paper, imitation basalt compounds using red mud, fly ash or coal gangue as raw materials were designed and prepared with the help of thermodynamic calculations. Thermodynamic calculations were used to obtain the suitable chemical composition. Then, the imitation compounds were prepared and their phase/compositions were analyzed. Finally, their high-temperature melting performance and crystallization ability were evaluated. The results show that the characteristic temperature and crystallization ability of the imitation basalt compounds were similar to those of basalt. Moreover, the viscosity of red mud imitation basalt compound approached the viscosity of basalt with the increase in temperature. This work suggests that red mud, fly ash and coal gangue can be mixed with quartz and other source materials to produce imitation basalt fiber. Therefore, thermodynamic calculation is an effective method to design and prepare high-performance imitation basalt compounds.

scholarly journals Mechanical Properties of Geopolymers Synthesized from Fly Ash and Red Mud under Ambient Conditions

Crystals ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 572 ◽  
Author(s):  
Nevin Koshy ◽  
Kunga Dondrob ◽  
Liming Hu ◽  
Qingbo Wen ◽  
Jay N. Meegoda
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Red Mud ◽  
Strength Properties ◽  
Industrial Wastes ◽  
Ambient Conditions ◽  
Pore Characteristics ◽  
Subsequent Formation ◽  
Synthesis Conditions ◽  
Class F Fly Ash

Aluminosilicate gels form geopolymers and nanocrystalline zeolites which have comparable strength properties, making them a potential replacement for ordinary Portland cement. The study explores the use of two untreated industrial wastes, Class-F fly ash and red mud, for synthesizing geopolymeric material at ambient synthesis conditions. The high alkalinity present in the red mud was exploited for the dissolution of silica in the fly ash and red mud. The mechanical, mineralogical, microstructural, and pore characteristics were analyzed and the contributions of curing period, Si/Al, Na/Al, and liquid-to-solid (L/S) ratios on the compressive strength of the end products were also investigated. The alkalinity of the system due to the red mud was adequate for the dissolution of raw fly ash and the subsequent formation of aluminosilicate gels. The strength of the end product was directly proportional to the initial Si/Al ratio and the specimens with highest fly ash content exhibited highest compressive strength values after 28 days of curing. Furthermore, fly ash contributed to the formation and distribution of interstitial and capillary pores in the aluminosilicate matrix. The lowest L/S ratio of the initial mix resulted in the end product with the highest unconfined compressive strength.

Research Progress of Natural Polymers in Wastewater Treatment

2019 ◽  
Vol 16 (4) ◽  
pp. 335-344 ◽  
Author(s):  
Xiang Li ◽  
Baojun Yang ◽  
Li Feng ◽  
Huaili Zheng ◽  
Guoming Zeng ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Environmental Protection ◽  
Environmental Awareness ◽  
Environmental Engineering ◽  
Research Progress ◽  
Future Trends ◽  
Natural Polymers

With the development of industry, urbanization, increasingly stringent environmental protection requirements, and strengthening of people’s environmental awareness, green treatment of pollutants has become a research hotspot in the field of environmental protection. Accordingly, the study on natural non-toxic polymers has received increasing attention from researchers. This paper aims to provide the present research progress of natural polymers in environmental engineering, including the striking characteristics and modification methods of the most well-known natural polymers, as well as their applications in environmental protection field. Concluding remarks and future trends are also pointed out.

scholarly journals A review on the properties, reinforcing effects, and commercialization of nanomaterials for cement-based materials

2020 ◽  
Vol 9 (1) ◽  
pp. 303-322 ◽  
Author(s):  
Zhifang Zhao ◽  
Tianqi Qi ◽  
Wei Zhou ◽  
David Hui ◽  
Cong Xiao ◽  
...  
Keyword(s):  
Cement Hydration ◽  
State Of The Art ◽  
Research Progress ◽  
Market Survey ◽  
Future Perspectives ◽  
Nano Silica ◽  
Physical Processes ◽  
Existing Problems ◽  
Cement Based Materials ◽  
The Cost

AbstractThe behavior of cement-based materials is manipulated by chemical and physical processes at the nanolevel. Therefore, the application of nanomaterials in civil engineering to develop nano-modified cement-based materials is a promising research. In recent decades, a large number of researchers have tried to improve the properties of cement-based materials by employing various nanomaterials and to characterize the mechanism of nano-strengthening. In this study, the state of the art progress of nano-modified cement-based materials is systematically reviewed and summarized. First, this study reviews the basic properties and dispersion methods of nanomaterials commonly used in cement-based materials, including carbon nanotubes, carbon nanofibers, graphene, graphene oxide, nano-silica, nano-calcium carbonate, nano-calcium silicate hydrate, etc. Then the research progress on nano-engineered cementitious composites is reviewed from the view of accelerating cement hydration, reinforcing mechanical properties, and improving durability. In addition, the market and applications of nanomaterials for cement-based materials are briefly discussed, and the cost is creatively summarized through market survey. Finally, this study also summarizes the existing problems in current research and provides future perspectives accordingly.

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