Search results

1 – 4 of 4
Article
Publication date: 7 September 2023

Ibrahim A. Amar, Aeshah Alzarouq, Wajdan Mohammed, Mengfei Zhang and Noarhan Matroed

This study aims to explore the possibility of using magnetic biochar composite (MBCC) derived from Heglig tree bark (HTB) powder (agricultural solid waste) and cobalt ferrite (CoFe…

Abstract

Purpose

This study aims to explore the possibility of using magnetic biochar composite (MBCC) derived from Heglig tree bark (HTB) powder (agricultural solid waste) and cobalt ferrite (CoFe2O4, CFO) for oil spill removal from seawater surface.

Design/methodology/approach

One-pot co-precipitation route was used to synthesize MBCC. The prepared materials were characterized by X-ray diffraction, scanning electron microscopy-energy dispersive X-ray spectroscopy, Fourier transform infrared spectroscopy. The densities of the prepared materials were also estimated. Crude, diesel engine and gasoline engine oils were used as seawater pollutant models. The gravimetric oil removal (GOR) method was used for removing oil spills from seawater using MBCC as a sorbent material.

Findings

The obtained results revealed that the prepared materials (CFO and MBCC) were able to remove the crude oil and its derivatives from the seawater surface. Besides, when the absorbent amount was 0.01 g, the highest GOR values for crude oil (31.96 ± 1.02 g/g) and diesel engine oil (14.83 ± 0.83 g/g) were obtained using MBCC as an absorbent. For gasoline engine oil, the highest GOR (27.84 ± 0.46 g/g) was attained when CFO was used as an absorbent.

Originality/value

Oil spill removal using MBCC derived from cobalt ferrite and HTB. Using tree bark as biomass (eco-friendly, readily available and low-cost) for magnetic biochar preparation also is a promising method for minimizing agricultural solid wastes (e.g. HTB) and obtaining value-added-products.

Details

World Journal of Engineering, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 1708-5284

Keywords

Article
Publication date: 8 March 2022

Ibrahim A. Amar, Sarah S. Kanah, Hibah A. Hijaz, Mabroukah A. Abdulqadir, Shamsi A. Shamsi, Ihssin A. Abdalsamed and Mohammed A. Samba

The purpose of this research is to assess the removal of oil spills from the seawater surface as well as the antibacterial activity of ZnFe2O4-cetyltrimethylammonium bromide…

Abstract

Purpose

The purpose of this research is to assess the removal of oil spills from the seawater surface as well as the antibacterial activity of ZnFe2O4-cetyltrimethylammonium bromide (CTAB, cationic surfactant) magnetic nanoparticles (ZFO-CTAB MNPs).

Design/methodology/approach

A CTAB-assisted sol–gel method was used to synthesize ZFO-CTAB MNPs. X-ray powder diffraction and Fourier transform infrared spectroscopy were used for ZFO-CTAB MNPs characterization. Also, the magnetic force and apparent density of ZFO-CTAB MNPs were determined. The oil spill cleanup was investigated by using the gravimetric oil removal (GOR) technique, which used ZFO-CTAB MNPs as oil absorbent material and four oil samples (crude, diesel, gasoline and used oil) as oil spill models. The antibacterial activity of ZFO-CTAB MNPs against Gram-negative bacteria (Pseudomonas aeruginosa, Escherichia coli and Salmonella typhi) was investigated by using the optical density method.

Findings

The results revealed that, when the amount of ZFO-CTAB was 0.01 g, gasoline oil had the highest GOR (51.80 ± 0.88 g/g) and crude oil had the lowest (11.29 ± 0.82 g/g). Furthermore, for Escherichia coli, Salmonella typhi and Pseudomonas aeruginosa, ZFO-CTAB MNPs inhibited bacterial growth with a higher percentage (94.24%–95.63%).

Originality/value

The applications of ZFO-CTAB MNPs in the cleanup of oil spills from aqueous solutions, as well as their antibacterial activity. The results showed that ZFO-CTAB MNPs are a promising material for removing oil spills from bodies of water as well as an antibacterial agent against Gram-negative bacterial strains.

Details

World Journal of Engineering, vol. 20 no. 4
Type: Research Article
ISSN: 1708-5284

Keywords

Article
Publication date: 19 April 2013

Arvydas Stoncius, Irma Liascukiene, Sigitas Jankauskas and Svajus J. Asadauskas

Workmanship concerns lead to more focus on volatile materials, released by industrial lubricants. Typically, flash point test and thermo‐gravimetrical analysis (TGA) are used to…

Abstract

Purpose

Workmanship concerns lead to more focus on volatile materials, released by industrial lubricants. Typically, flash point test and thermo‐gravimetrical analysis (TGA) are used to investigate basestock volatility, but they do not address long‐term decomposition tendencies of lubricants. The extent of volatile losses due to chemical degradation (oxidation, hydrolysis, dissociation, etc.) remains unclear.

Design/methodology/approach

Vaporisation tendencies of eight additive‐free bio‐based, synthetic and mineral basestocks with similar viscosities were compared experimentally in a 30‐80 h degradation test. Thin films (30‐50 μm) of oils were placed on the steel surface and heated to 130‐140°C with periodic cooling to room temperatures for gravimetric measurement of volatile losses.

Findings

Mineral oils lost some fractions initially, but their evaporation subsided afterwards. To the contrary, PAO, polyglycol and polyol ester type oils showed low losses early into the test, but later they started producing high amounts of volatiles. After approx. 10‐15 h the evaporation from mineral oils was clearly lower than that from synthetic or bio‐based oils with substantially higher flash points.

Originality/value

Test results challenge the existing viewpoint that viscous oils with high flash points are non‐volatile. It was found that even fully synthetic and bio‐based oils lost more than 30 wt.% contents, despite being considered almost non‐volatile. Such extensive decomposition of oil films should be taken into account when making the equipment‐engineering or workmanship‐related decisions in the industry.

Details

Industrial Lubrication and Tribology, vol. 65 no. 3
Type: Research Article
ISSN: 0036-8792

Keywords

Article
Publication date: 1 March 1978

Statements by Lord Denning, M.R., vividly describing the impact of European Community Legislation are increasingly being used by lawyers and others to express their concern for…

Abstract

Statements by Lord Denning, M.R., vividly describing the impact of European Community Legislation are increasingly being used by lawyers and others to express their concern for its effect not only on our legal system but on other sectors of our society, changes which all must accept and to which they must adapt. A popular saying of the noble Lord is “The Treaty is like an incoming tide. It flows into the estuaries and up the rivers. It cannot be held back”. The impact has more recently become impressive in food law but probably less so than in commerce or industry, with scarcely any sector left unmolested. Most of the EEC Directives have been implemented by regulations made under the appropriate sections of the Food and Drugs Act, 1955 and the 1956 Act for Scotland, but regulations proposed for Materials and Articles in Contact with Food (reviewed elsewhere in this issue) will be implemented by use of Section 2 (2) of the European Communities Act, 1972, which because it applies to the whole of the United Kingdom, will not require separate regulations for England and Wales, Scotland and Northern Ireland. This is the first time that a food regulation has been made under this statute. S.2 (2) authorises any designated Minister or Department to make regulations as well as Her Majesty Orders in Council for implementing any Community obligation, enabling any right by virtue of the Treaties (of Rome) to be excercised. The authority extends to all forms of subordinate legislation—orders, rules, regulations or other instruments and cannot fail to be of considerable importance in all fields including food law.

Details

British Food Journal, vol. 80 no. 3
Type: Research Article
ISSN: 0007-070X

1 – 4 of 4