CAJ | 학술논문

用磷酸改性和甲醛-硫酸改性核桃壳吸附模拟废水中Cr（Ⅵ），探讨了核桃壳投加量、吸附时间、水样初始pH值和初始浓度等因素对Cr（Ⅵ）吸附效果的影响，通过扫描电子显微镜（ SEM）和红外光谱（ IR）表征核桃壳的结构.实验结果表明，磷酸改性核桃壳对Cr（Ⅵ）的去除率为99.4%，最大吸附容量为3.24 mg/g，甲醛-硫酸改性核桃壳对Cr（Ⅵ）的去除率为98.4%，最大吸附容量为8.23 mg/g.未改性核桃壳和甲醛-硫酸改性核桃壳对Cr（Ⅵ）的吸附等温线更符合Freundlich等温吸附方程，磷酸改性核桃壳的吸附等温线与Langmuir等温吸附方程拟合地更好.
용린산개성화갑철-류산개성핵도각흡부모의폐수중Cr（Ⅵ），탐토료핵도각투가량、흡부시간、수양초시pH치화초시농도등인소대Cr（Ⅵ）흡부효과적영향，통과소묘전자현미경（ SEM）화홍외광보（ IR）표정핵도각적결구.실험결과표명，린산개성핵도각대Cr（Ⅵ）적거제솔위99.4%，최대흡부용량위3.24 mg/g，갑철-류산개성핵도각대Cr（Ⅵ）적거제솔위98.4%，최대흡부용량위8.23 mg/g.미개성핵도각화갑철-류산개성핵도각대Cr（Ⅵ）적흡부등온선경부합Freundlich등온흡부방정，린산개성핵도각적흡부등온선여Langmuir등온흡부방정의합지경호.
The simulated Cr(Ⅵ)-containing wastewater was treated by phosphoric acid and formaldehyde-acid modified walnut shell-based adsorbent. The effects of the dosage of walnut shell,time,the initial wastewater pH,the initial concentration of Cr(Ⅵ)and other factors on the adsorption result was discussed. The characterization of modified walnut shell strueture was studied by scanning electron microscope( SEM)and infrared spectroscopy. The experimental results showed that:Phosphoric acid modified walnut shell of Cr(Ⅵ)removal rate was 99. 4%,the maximum adsorption capacity was 3. 24 mg/g,formaldehyde-acid modified walnut shell of Cr(Ⅵ)removal rate was 98. 4%,and the maximum adsorption capacity was 8. 23 mg/g. The adsorption isotherm of Cr(Ⅵ)with unmodified walnut shell and formaldehyde/acid modified walnut shell was more in line with the Freundlich equation,the adsorption isotherm of Cr(Ⅵ)with phosphoric acid modified walnut shell fits better with Langmuir equation.