Title of article :
Effect of Phosphoric Acid Modification on Characteristics of Rice Husk Activated Carbon
Author/Authors :
Mohammad, Y.S Department of Water Resources and Environmental Engineering - A. B. U. Zaria, Nigeria , Shaibu-Imodagbe, E.M Samaru College of Agriculture - Division of Agricultural Colleges - A. B. U. Zaria, Nigeria , Igboro, S.B Department of Water Resources and Environmental Engineering - A. B. U. Zaria, Nigeria , Giwa, A Department of Textile Science and Technology- A. B. U. Zaria, Nigeria , Okuofu, C.A Department of Water Resources and Environmental Engineering - A. B. U. Zaria, Nigeria
Abstract :
Activated carbon was produced from rice husk via thermal pretreatment preceding chemical modification with phosphoric acid. In order to study the effect of phosphoric acid modification, the characteristics of the activated carbon produced were determined before and after acid modification and subsequently compared. These characteristics include surface morphology, surface functional groups, surface area, average pore diameter and pore volume. Characterization results showed that modification of the thermally treated rice husk with phosphoric acid enhanced the surface area of the activated carbon from 12.47 to 102.4m2/g. The average pore diameter was also enhanced from 2.4 to 1.82nm. It also shows improvement in micropore volume from 0.0052 to 0.034cm3/g. SEM analysis confirmed the improvement in surface area and pore development resulting from the phosphoric acid modification while FTIR analysis revealed the existence of phosphorous-oxy-containing functional groups on the surface of the phosphoric acid modified activated carbon.
Farsi abstract :
كربن فعال با استفاده پيش تيمار دمايي همراه با اصلاح سازي شيميايي با فسفريك اسيد از سبوس برنج بدست آمد. به منظور بررسي تاثير اصلاح سازي شيميايي، خواص كربن فعال قبل و بعد از اصلاح سازي تعيين شد. بررسي خواص كربن فعال شامل بررسي مرفولوژي، گروه هاي عملكردي سطحي، مساحت سطح، قطر ميانگين تخلخل و حجم تخلل مي باشد. نتيجه بررسي خواص نشان داد كه اصلاح سازي شيميايي سبوس پيش تيمار شده دمايي با فسفريك اسيد nm به 1 / 82 شد. هم چنين اين كار سبب افزايش ميانگين حجم سورخ ها از nm 102 / 4 m / g به 12 / 47 m / g سبب افزايش مساحت سطحي كربن فعال از شد. آناليز SEM افزايش 0 / 034 cm * / g 010052 به cm * / g شد. علاوه بر اين اصلاح سازي شيميايي سبب افزايش حجم هاي ميكروسكوپيك تخلخل ها از 2 / 4 ريزتخلخل ها را پس از اصلاح سازي شيميايي با فسفريك اسيد را تاييد كرد در حاليكه آناليز FTIR وجود گروه هاي عملكردي فسفري- اكسي بر روي سطح كربن فعال پس از اصلاح سازي شيميايي را نشان داد.
Keywords :
Rice husk , Adsorption capacity , Removal efficiency , Chemical modification
Journal title :
Astroparticle Physics
