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Scientific articles

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Research article Open access

Engineering Properties of Volcanic Tuff from the Western Part of Yemen

Adnan A. Barahim, Ibrahim Abdulhamid Al-Akhaly, Is'haq R. Shamsan · Sultan Qaboos University Journal for Science · 2018 · 10.24200/squjs.vol22iss2pp81-88

This paper deals with a study of the physical and mechanical characteristics of volcanic tuff and ignimbrite from six quarries located at different areas in the western part of Yemen (Manakha, Jahran, Bakhran, Dar Al-Hanash, Abaser and Soraifa). In the region, volcanic tuffs and ignimbrite are locally known by their lo …

Research article Open access

Uptake of Cd(II) Using Natural Zeolite: Batch and Continuous Fixed-Bed Studies

Luna M. LMarashdeh, Ahmad M. Al-Haj-Ali · The Journal of Engineering Research · 2009 · 10.24200/tjer.vol6iss2pp1-11

Uptake of Cd(II) ions by natural phillipsite tuff was investigated both in shake-flask and fixed-bed columns. Equilibrium uptake, qe, was found to best fit Langmuir adsorption isotherm with a maximum value of 25.78 mg/g. Percent removal of Cd ions was close to 100% from initial metal ion concentrations in the range 50 …

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