Synthesis, characterization and application of textile sludge biochars for oil removal

Sohaimi, Khairunissa Syairah Ahmad; Ngadi, Norzita; Mat, Hanapi; Inuwa, Ibrahim Mohammed; Wong, Syieluing

doi:10.1016/j.jece.2017.02.002

Cited by 58 publications

(10 citation statements)

References 30 publications

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“…However, the adsorption capacity of CSB increased slowly when the diesel solution concentration reached 400 mg/L. It may have been that diesel oil particles covered the surface of biochar, resulting in the decrease in the adsorption rate [54]. It can be seen clearly in Figure 11 that the adsorption capacity of modified crab shell biochar was significantly stronger than that of unmodified crab shell biochar.…”

Section: Resultsmentioning

confidence: 99%

Effective Adsorption of Diesel Oil by Crab-Shell-Derived Biochar Nanomaterials

et al. 2019

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This study, for the first time, rendered crab shell activated biochar modified by potassium hydroxide (KOH) impregnation (CSAB), revealing a new potential application in the removal of diesel oil from oily wastewater. The structural characteristics of crab shell biochar (CSB) and CSAB were investigated by SEM, and the crystal structure and optical properties of as-prepared samples were analyzed using XRD and FTIR. Results showed that CSAB had stratified surface structure morphology, abundant functional groups, and that its high specific surface area could reach up to 2441 m2/g, which was about eight times larger than that of untreated CSB (307 m2/g). An adsorption isotherm study indicated that the actual adsorption process both of CSAB and CSB were found to fit better with the Freundlich equation. Moreover, chemical interaction controlled the adsorption kinetics efficiency while the adsorption equilibrium capacity was 93.9 mg/g. Due to its highly developed pore structure, unique surface characteristics, and effective adsorption performance, this low-cost activated carbon had the potential to serve as an efficient adsorbent for water pollution purification.

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Section: Resultsmentioning

confidence: 99%

Effective Adsorption of Diesel Oil by Crab-Shell-Derived Biochar Nanomaterials

et al. 2019

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“…Among these is the waste from the galvanic industry, which produces on average in the United States about 150,000 t•year −1 [2], similar values are reported by the European Union [3]. Sludge represents approximately 25 m 3 for every million tons of textile wastewater and two-thirds of these sludges have physicochemical properties that can be modified [4,5].…”

Section: Introductionmentioning

confidence: 70%

“…The sludge of the galvanic industry has been mainly treated by thermochemical processes such as pyrolysis and incineration. The byproducts of this process have been used as adsorbents [5,16]. Due to the diverse metallic content of this residual industrial sludge, there is the possibility of recovering these residues for the synthesis of catalysts [15,[17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Catalytic Cracking of Heavy Crude Oil over Iron-Based Catalyst Obtained from Galvanic Industry Wastes

et al. 2020

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Sewage sludge from the galvanic industry represents a problem to the environment, due to its high metal content that makes it a hazardous waste and must be treated or disposed of properly. This study aimed to evaluate the sludge from three galvanic industries and determine its possible use as catalysts for the synthesis of materials. Catalyst was obtained from a thermal process based on dried between 100–120 °C and calcination of sludges between 400 to 700 °C. The physical–chemical properties of the catalyst were analyzed by several techniques as physisorption of N2 and chemisorption of CO of the material. Catalytic activity was analyzed by thermogravimetric analysis of a thermo-catalytic decomposition of crude oil. The best conditions for catalyst synthesis were calcination between 400 and 500 °C, the temperature of reduction between 750 and 850 °C for 15 min. The catalytic material had mainly Fe as active phase and the specific surface between 17.68–96.15 m2·g−1, the catalysts promote around 6% more weight-loss of crude oil in the thermal decomposition compared with assays without the catalyst. The results show that the residual sludge of galvanic industries after thermal treatment can be used as catalytic materials due to the easiness of synthesis procedures required, the low E-factor obtained and the recycling of industrial waste promoted.

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“…Direct discharge of edible waste oil into drains and water bodies leads to adverse impacts on human health and the environment 1 . Oil deterioration can be induced by heat, air, and moisture, which lead to polymerization, oxidation, and hydrolysis of the polar compounds 2,3 .…”

Section: Introductionmentioning

confidence: 99%

“…These reactions affect the stability of edible oil. Therefore, it is necessary to develop an environmentally friendly and efficient edible oil treatment and management strategy 1 . In Japan, 2.29 million tons of edible oil is consumed annually, with the food service industry and domestic use consuming 1.91 and 0.38 tons of oil, respectively, in 2013.…”

Section: Introductionmentioning

confidence: 99%