استخدام قشور الرز العراقي المعالج كمادة مازة لإزالة أيون الفوسفات من محلول مائي

Anaam A. Sabri, Yaser A. Hashim
2020 Engineering and Technology Journal  
In the present work, agricultural waste, Iraqi rice husk (A'anbar type) was developed with thermal and chemical treatments for using as an adsorbent to remove phosphate anion from aqueous solution and the thermal treatment at 500 Co was the best. Batch experiments were conducted to obtain the maximum removal of phosphate via changing the parameters of process, such as contact time, pH, adsorbent dose, initial solute concentration, and the existence of competitive anions upon the removal of
more » ... hate and were investigated. The adsorbent characterization was performed employing Fourier transform infrared (FTIR), X-ray fluorescence (XRF), scanning electron microscope (SEM), the BET surface area and pore volume, and X-ray diffraction spectrophotometric analysis (XRD). The maximum removal of phosphate was achieved respectively as (96 %), of contact time 140 min., pH 2.0, adsorbent dose 20 g/L, and initial concentration 30 mg/L at room temperature. The effects of competing ions of CO3-2, NO-3 and SO4-2 anions were studied. The experimental data manifested the best fit for the Langmuir isotherm model (R2 = 0.99) and pseudo-second order kinetic model (R2 = 0.99). Rice husk ash was found efficient for the phosphate removal from the wastewater.
doi:10.30684/etj.v38i11a.1538 fatcat:pafz3yp4z5hvpd6yexjb6jxosm