King Saud University

Masoom Raza Siddiqui

Zeid Abdullah ALOthman

Ayoub Abdullah Alqadami

Moonis Ali Khan

Ibrahim Hotan Alsohaimi

Ayman A Ghfar

A method of producing hydrochar from jackfruit peel biomass includes hydrothermal carbonization of jackfruit peel biomass by autoclaving at 150&#xb0; C.-250&#xb0; C. for about 3 hours to produce a hydrochar. The hydrochar can be activated by treatment with phosphoric acid (HPO), hydrogen peroxide (HO), or a combination thereof. The hydrochar produced according to the method is particularly effective at removing azo-dyes, and specifically methylene blue, from aqueous solutions such as industrial waste water.

Synthesis of hydrochar from jackfruit

The magnetic polymer nanocomposite for removal of divalent heavy metal ions from water is magnetic nanocomposite having a core of magnetite (FeO) in a shell of branched polyhydroxystyrene (BHPS), designated as FeO@BHPS. The nanocomposite is synthesized by co-precipitation in alkali solution. Testing showed the nanocomposite reached 93% and 80% Pb(II) and Cd(II) adsorption, respectively, in 30 minutes, attaining equilibrium in 120 minutes. The maximum adsorption capacities of Pb(II) and Cd(II) at 298K were 186.2 and 125 mg/g, respectively. After adsorption, the nanocomposite with the heavy metal(s) adsorbed thereto was easily removed from aqueous solution by application of a magnetic field.

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Riyadh, Saudi Arabia

Masoom Raza Siddiqui