Effect of alkali species on synthesis of K-F zeolitic materials from paper sludge ash for soil amendment

2012 ◽  
Vol 207-208 ◽  
pp. 906-912 ◽  
Author(s):  
Takaaki Wajima ◽  
Kenzo Munakata
Keyword(s):  
Soil Amendment ◽  
Paper Sludge ◽  
Paper Sludge Ash ◽  
Sludge Ash ◽  
Zeolitic Materials

scholarly journals Effects of Step-Wise Acid Leaching with HCl on Synthesis of Zeolitic Materials from Paper Sludge Ash

Minerals ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 402
Author(s):  
Takaaki Wajima
Keyword(s):  
Cation Exchange ◽  
Acid Leaching ◽  
Paper Sludge ◽  
Acid Solutions ◽  
Naoh Solution ◽  
Paper Sludge Ash ◽  
Sludge Ash ◽  
Zeolitic Materials

Incinerated ash with a relatively high Ca content, paper sludge ash, was converted to zeolitic materials with high cation-exchange capacities (CECs) by aging at 80 °C in NaOH solution via step-wise acid leaching with HCl to reduce the ash Ca content. The extraction of Ca, Mg, Si, and Al from the ash into the acid solutions during leaching and the products obtained from the leached ash by reaction with an alkali were examined. The contents of Ca and Mg in the ash were more easily extracted from the ash than those of Si and Al in the initial leaching. The leachant pH decreased with increasing numbers of leaching steps, and the amounts of Si, Al, and Ca extracted from the ash increased as a result of the dissolution of gehlenite (Ca2Al2SiO7), one of the main minerals in the ash. Zeolites A and P were synthesized from the leached ashes, and hydroxysodalite was synthesized from the raw ash. With increasing numbers of leaching steps of the ash, the obtained product contained lower released Ca, whereas the product contained higher released Na and has higher CEC, depending on the zeolite phases in the product. The product with the highest CEC was synthesized from third-leached ash, and its CEC was 1.5 mmol/g, which is about four times higher than that of the raw ash (0.4 mmol/g).

The Available Utilization of the Paper Sludge Ash

2009 ◽  
Vol 63 (12) ◽  
pp. 1465-1469 ◽  
Author(s):  
Yukio Tani
Keyword(s):  
Paper Sludge ◽  
Paper Sludge Ash ◽  
Sludge Ash

Effect of Paper Sludge Ash on the Compressive Strength of Plaster of Paris/Paper Sludge Ash Composites

2012 ◽  
Vol 501 ◽  
pp. 34-38 ◽  
Author(s):  
Kar Keng Lim ◽  
Roslinda Shamsudin ◽  
Muhammad Azmi Abdul Hamid
Keyword(s):  
Compressive Strength ◽  
Construction Material ◽  
Paper Industry ◽  
Pulp And Paper Industry ◽  
Paper Sludge ◽  
Mixed Powder ◽  
Plaster Of Paris ◽  
Paper Sludge Ash ◽  
Sludge Ash ◽  
Cylindrical Samples

In this study, paper sludge ash, a waste from pulp and paper industry was used as a filler in fabricating Plaster of Paris/paper sludge ash composites. Various percentage of paper sludge ash was used, namely 1wt.%, 3wt.%, 5wt.% and 7wt.%. The effect of paper sludge ash on the compressive strength of the Plaster of Paris was studied. The mixed powder of paper sludge ash and Plaster of Paris were form into a 6 mm diameter and 12 mm height cylindrical samples. The composites were characterized theirs density where it shows that the density decreased as the amount of paper sludge ash increased. The compressive strength of the composites also decreased from 11.67 MPa without paper sludge ash addition to 0.50 MPa at 7wt.% paper sludge ash. However, the requirement of strength for Plaster of Paris in industry is between 8.96 MPa to 20.68 MPa. From the SEM observation, sample contain higher percentage of paper sludge ash exhibited more porosity. Therefore with the addition of 1wt.% of paper sludge ash into Plaster of Paris can be a promising construction material.

scholarly journals Partial Replacement of Cement with Waste Paper Sludge Ash

2021 ◽  
Vol 9 (11) ◽  
pp. 1975-1983
Author(s):  
Shahid Bashir
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Water Absorption ◽  
Cement Industry ◽  
Waste Paper ◽  
Partial Replacement ◽  
Dry Density ◽  
Paper Sludge ◽  
Paper Sludge Ash ◽  
Sludge Ash

Abstract: Cement production is one of the sources that emit carbon dioxide, in addition to deforestation and combustion of fossil fuels also leads to ill effects on environment. The global cement industry accounts for 7% of earth’s greenhouse gas emission. To enhance the environmental effects associated with cement manufacturing and to constantly deplore natural resources, we need to develop other binders to make the concrete industry sustainable. This work offers the option to use waste paper sludge ash as a partial replacement of cement for new concrete. In this study cement in partially replaced as 5%, 10%, 15% and 20% by waste paper sludge ash in concrete for M25 mix and tested for compressive strength, tensile strength, water absorption and dry density up to the age of 28days and compared it with conventional concrete, based on the results obtained, it is found that waste paper ash may be used as a cement replacement up to 5% by weight and the particle size is less the 90µm to prevent reduction in workability. Keywords: slump test, Compressive strength, split tensile strength, water absorption test, Waste Paper Sludge Ash Concrete, Workability.

Material conversion from paper-sludge ash in NaOH, KOH, and LiOH solutions

2007 ◽  
Vol 92 (7) ◽  
pp. 1105-1111 ◽  
Author(s):  
T. Wajima ◽  
H. Ishimoto ◽  
K. Kuzawa ◽  
K. Ito ◽  
O. Tamada ◽  
...  
Keyword(s):  
Paper Sludge ◽  
Paper Sludge Ash ◽  
Sludge Ash

Effect of Alkaline Activators Concentration to the Strength and Morphological Properties of Wastepaper-Based Geopolymer Mortars

2014 ◽  
Vol 803 ◽  
pp. 88-92 ◽  
Author(s):  
A.R.M. Ridzuan ◽  
A.A. Khairulniza ◽  
M.A. Fadzil ◽  
J. Nurliza
Keyword(s):  
Compressive Strength ◽  
Ambient Temperature ◽  
Waste Paper ◽  
Morphological Properties ◽  
Composition Analysis ◽  
Paper Sludge ◽  
High Porosity ◽  
X Ray ◽  
Paper Sludge Ash ◽  
Sludge Ash

Waste paper sludge ash (WPSA) is a byproduct that has potential to replace Ordinary Portland Cement (OPC) as a building material. The purpose of this study is to investigate the effect of NaOH concentration on the strength of Waste Paper Sludge Ash (WPSA)-based geopolymer mortar. Initially, the WPSA samples were been analyzed using X-ray Fluorescence (XRF) to determine the chemical composition. From the XRF analysis, the by-product WPSA containing higher amount of calcium, silica and alumina. Alkaline solution are from soluble sodium-based used in geopolymerization are combination of Sodium Hydroxide (NaOH) and Sodium Silicate (Na2SiO3). The mortars samples were cast with various concentration of NaOH and ratio of Na2SiO3 /NaOH which is 2.5. The specimens were carried out on size 50x50x50 mm cube and fresh mortar were been cured at 70 ̊c oven temperature and ambient temperature. The compressive strength tests were conducted after aging the specimen at 3, 7, 14, and 28 days. The results revealed that as the concentration of NaOH increased, the compressive strength of geopolymer mortar increases. However, the optimum NaOH concentration of geopolymer mortar is at 12M. More than 12M concentrations of NaOH were produced high porosity and decreasing the strength. Moreover, curing of fresh geopolymer mortar is performed mostly at an oven temperature compared to ambient temperature due to heat being a reaction accelerator. This paper also present on the morphology, and Energy dispersive x-Ray (EDX) composition analysis of WPSA based geopolymer mortar.

scholarly journals Calcium Performance in Paper Sludge Ash as Suppressing Material

2019 ◽  
Vol 543 ◽  
pp. 012092
Author(s):  
E R Desfitri ◽  
F F Hanum ◽  
Y Hayakawa ◽  
S Kambara
Keyword(s):  
Paper Sludge ◽  
Paper Sludge Ash ◽  
Sludge Ash
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