A sludge and modified rice husk ash-based geopolymer: synthesis and characterization analysis

Wen, Nana; Zhao, Yading; Yu, Zhenyun; Liu, Minghao

doi:10.1016/j.jclepro.2019.04.045

Cited by 90 publications

(36 citation statements)

References 46 publications

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“…e bands at 1745 cm −1 and 1660 cm −1 are also related to the elastic vibrations of the CO bond in carboxyl groups [16]. e spectrum also contains other bands at 1040 cm −1 , 806 cm −1 , and 465 cm −1 , which correspond to the biogenic silica [14,[17][18][19]. e band at 1040 cm −1 is associated with the asymmetric stretching vibration of Si-O-Si in the biogenic silica.…”

Section: Results Of Ft-ir Analysismentioning

confidence: 98%

Water Treatment for Fish Aquaculture System by Biochar-Supplemented Planting Panel System

Mopoung

Udeye

Viruhpintu

et al. 2020

The Scientific World Journal

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Rice husk biochars were prepared by carbonization at 400–600°C. The products were analyzed by FTIR, SEM-EDS, BET, and approximate analysis in order to find final products with the best properties and the lowest carbonization temperature. It has been found that the biochar prepared at 500°C, which has 37.86 ± 0.11% yield, 341.0776 m2/g of BET surface area, and 0.136639 cm3/g of micropore volume, is suitable for use as a root supplement in the aquaponic system. The aquaponic systems consist of aquaculture and a hydroponic system with and without biochar supplement. The control experiment consists of an aquaculture and planting panel with biochar supplement disconnected from each other. Tilapia and Chinese morning glory were used for growth studies. The water quality from all aquaculture ponds has also been analyzed at an interval of 10 days for 47 days. The results showed that the growth rates of Tilapia and Chinese morning glory in the aquaponic system with biochar were clearly higher than in the control experiment, which is in accordance with the water quality in each aquaculture pond. However, the growth rates of Tilapia (23.5 g/body vs. 22.7 g/body) and morning glory (3.907 g/stem vs. 2.609 g/stem) in supplemented biochar system tend to be higher than the nonsupplemented biochar system. It has been shown that rice husk biochar can help in treating water in the aquaponic system by increasing the amount of dissolved oxygen in the aquaculture water and conversion of toxic compounds to those beneficial for plant growth.

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Section: Results Of Ft-ir Analysismentioning

confidence: 98%

Water Treatment for Fish Aquaculture System by Biochar-Supplemented Planting Panel System

Mopoung

Udeye

Viruhpintu

et al. 2020

The Scientific World Journal

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“…The rice husk ash (RHA) is an agricultural byproduct that remains in the combustion process (500 and 600 °C) [38] of rice husks and was taken from a rice factory (Edirne, Turkey). This stabilizer can be considered as green waste with a net zero carbon footprint [39]. High pozzolanic reactions can be obtained when the particle sizes of rice husk ash are smaller (<0.075 mm) [38].…”

Section: Experimental Investigationmentioning

confidence: 99%

Performances of Using Geopolymers Made with Various Stabilizers for Deep Mixing

2019

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This research aims to experimentally investigate the potential use of a geopolymer made from various stabilizers or byproducts (fly ash (FA-F, FA-C), slag (SL), glass powder (GP), metakaolin (MK), marble powder (MP), bottom ash (BA), rice husk ash (RHA), silica fume (SF)) to enhance the mechanical performance of soil (clay) via a deep mixing technique. Strengths of geopolymer soilcrete specimens were determined by unconfined compressive strength (UCS) tests regarding curing times (7 to 365 days) by comparing with Portland cement (PC). In addition, ultrasonic pulse velocity (UPV) tests, the effect of molarity (8–16 M), stress-strain behavior, failure modes, and microstructure (SEM, EDX) of geopolymer specimens were examined. Compared to PC, UCS responses of geopolymer specimens yielded: (i) a decreasing trend for FA-F, GP, MK, BA, and MP + FA-F, (ii) an increasing trend for FA-C, SL, and combinations of SL (BA + SL, RHA + SL, SF + SL, MK + SL) favorable with fewer proportions of stabilizers, and (iii) higher increments due to long-term curing (90, 365 days). Despite some decrements, most UCS values were found acceptable (>0.2 MPa) for sufficient enhancement of soft clay. The UCS results were mostly confirmed by UPV performances. The geopolymer specimens were also found to present: (i) strength development for alkaline concentrations from 10 to 14 M, (ii) brittle behavior of stress–strain curves that failed in axial splitting and near axial directions, and (iii) intensity of the silica peak for strength responsibility of the dense microstructure. The findings relatively support the usage of stabilizers or byproducts in the production of geopolymers for potential use in deep mixing. Thus, this research could be a basis for further efforts in this area.

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“…The present paper audits and examines creation of geopolymer concrete, mechanical, and durability properties of normal pozzolan based geopolymer acquired with antacid arrangement as hardener or activator. Since the cements rely upon their properties at nano-auxiliary level this survey additionally targets giving better comprehension of the microstructural examination results utilized so far to clarify the nanometric attributes of geopolymer materials from regular pozzolan [4].…”

Section: Revised Manuscript Received On December 5 2019mentioning

confidence: 99%

Effect of Hybrid Binder on Properties of Geopolymer Concrete – State of Art

Premkumar¹,

Chokkalingam²,

Meyyappan³

et al. 2019

IJEAT

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Natural pozzolans are colossal wellspring of receptive silica and alumina required for geopolymer amalgamation as an alternative binder for conventional Portland concrete. They are accessible at a relatively minimal effort and produce a low environmental impression through their basic extraction. Following audit paper condenses the mechanical and durability attributes just as the micro structural properties of common pozzolan based geopolymers and their potential as binder. The stretch out of geopolymerization increments with the expansion of curing temperature invigorating higher compressive at early ages with no huge effect on later age strength, in any case, expansion of different cementitious materials and hybrid binder improves the mechanical and durability properties of these geopolymers. This paper displays a succinct audit of different examinations that have demonstrated the use of different modern waste items in the amalgamation of geopolymers.

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A sludge and modified rice husk ash-based geopolymer: synthesis and characterization analysis

Cited by 90 publications

References 46 publications

Water Treatment for Fish Aquaculture System by Biochar-Supplemented Planting Panel System

Water Treatment for Fish Aquaculture System by Biochar-Supplemented Planting Panel System

Performances of Using Geopolymers Made with Various Stabilizers for Deep Mixing

Effect of Hybrid Binder on Properties of Geopolymer Concrete – State of Art

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