Product Composition of Pyrolyzed Sewage Sludge and Adsorption of Methylene Blue by Porous Material Derived from It

A large amount of coal gasification slag is produced every year in China. However, most of the current disposal is into landfills, which causes serious harm to the environment. In this research, coal gasification fine slag residual carbon porous material (GFSA) was prepared using gasification fine slag foam flotation obtained carbon residue (GFSF) as raw material and an adsorbent to carry out an adsorption test on waste liquid containing methylene blue (MB). The effects of activation parameters (GFSF/KOH ratio mass ratio, activation temperature, and activation time) on the cation exchange capacity (CEC) of GFSA were investigated. The total specific surface area and pore volume of GSFA with the highest CEC were 574.02 m2/g and 0.467 cm3/g, respectively. The degree of pore formation had an important effect on CEC. The maximum adsorption capacity of GFSA on MB was 19.18 mg/g in the MB adsorption test. The effects of pH, adsorption time, amount of adsorbent, and initial MB concentration on adsorption efficiency were studied. Langmuir isotherm and quasi second-order kinetic model have a good fitting effect on the adsorption isotherm and kinetic model of MB.

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Tolerance levels of sulfur-oxidizing micro-organisms to Methylene blue and Remazol black B dyes during sewage sludge bioleaching

Desalination and Water Treatment ◽

10.1080/19443994.2013.817374 ◽

2013 ◽

Vol 52 (31-33) ◽

pp. 6185-6193 ◽

Cited By ~ 1

Author(s):

Kapil Kumar ◽

M.G. Dastidar ◽

T.R. Sreekrishnan

Keyword(s):

Methylene Blue ◽

Sewage Sludge ◽

Remazol Black B ◽

Sulfur Oxidizing ◽

Micro Organisms ◽

Remazol Black

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Synthesis of composite sorbent for the treatment of aqueous solutions contaminated with methylene blue dye

Water Science & Technology ◽

10.2166/wst.2020.241 ◽

2020 ◽

Vol 81 (7) ◽

pp. 1494-1506

Author(s):

Maad F. Al Juboury ◽

Musa H. Alshammari ◽

Mohammed R. Al-Juhaishi ◽

Laith A. Naji ◽

Ayad A. H. Faisal ◽

...

Keyword(s):

Methylene Blue ◽

Sewage Sludge ◽

Nitrate Solution ◽

Permeable Reactive Barrier ◽

Blue Dye ◽

Ferric Nitrate ◽

Maximum Adsorption Capacity ◽

Composite Sorbent ◽

Kinetic Measurements ◽

Waterworks Sludge

Abstract To apply the principles of sustainability, this study aims to prepare the composite sorbent from mixing of solid wastes that resulted from activities of treatment plants for wastewater and water supply. The manufacturing process depends on the mixing of sewage sludge with waterworks sludge at different proportions and the best mixture is modified by ferric nitrate solution. The prepared composite sorbent was evaluated as permeable reactive barrier (PRB) in the capturing of methylene blue (MB) dye presented in the simulated groundwater. Results proved that the suitable mixture of composite sorbent consisting of 0.25 g sewage sludge with 0.75 g waterworks sludge coated with aqueous solution of 2 g of Fe(NO3)2 achieved the maximum sorption capacity. In comparison with Freundlich model, Langmuir expression described the sorption measurements in a well manner; so, the chemisorption is governed by the removal of MB with maximum adsorption capacity reached to 268.98 mg/g. Kinetic measurements could be more representative by pseudo-first-order model and this means that the sorption process is supported by physical forces. Finally, the effects of inlet concentrations and bed thickness on the migration of MB front were simulated in an efficient manner by COMSOL Multiphysics 3.5a package with root mean squared errors not in excess of 0.152.

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