CAJ | 학술논문

以农业废弃物柚子皮为原料, 利用ZnCl2 活化法制备柚皮基活性炭( GAC)处理含Cr(Ⅵ)废水. 采用响应面优化法中Box-Behnken设计试验, 研究了吸附剂投加量、初始浓度、温度和pH 值4 个因素对水溶液中Cr(Ⅵ)吸附效果的影响, 建立了GAC对Cr(Ⅵ)去除率的二次多项回归模型. Cr(Ⅵ)去除率试验值和预测值基本一致, 方程能够较好地预测吸附过程. 在试验范围内以最小吸附剂量获得最大去除率为目标进行优化,确定最佳吸附工艺条件为温度45℃、pH为2、初始浓度300.05 mg/L、GAC投加量1.38 g/L, Cr (Ⅵ)的平均去除率为72.08%, 与理论预测值( 72.38%)相比, 误差仅为0.415%.
이농업폐기물유자피위원료, 이용ZnCl2 활화법제비유피기활성탄( GAC)처리함Cr(Ⅵ)폐수. 채용향응면우화법중Box-Behnken설계시험, 연구료흡부제투가량、 초시농도、 온도화pH 치4 개인소대수용액중Cr(Ⅵ)흡부효과적영향, 건립료GAC대Cr(Ⅵ)거제솔적이차다항회귀모형. Cr(Ⅵ)거제솔시험치화예측치기본일치, 방정능구교호지예측흡부과정. 재시험범위내이최소흡부제량획득최대거제솔위목표진행우화,학정최가흡부공예조건위온도45℃、pH위2、초시농도300.05 mg/L、GAC투가량1.38 g/L, Cr (Ⅵ)적평균거제솔위72.08%, 여이론예측치( 72.38%)상비, 오차부위0.415%.
Hexavalent chromium removal from aqueous solution is investigated by ZnCl2-activated carbon devel-oped from grapefruit peel, an agricultural solid waste.A standard response surface methodology design is ap-plied to investigate the effects of adsorbent dosage, initial concentration of Cr(Ⅵ) , temperature and pH on the adsorption performance to Cr(Ⅵ) in the aqueous solution.A regression equation of the modification parameters is established.The experimental data of the adsorption capacity are found satisfactorily with the model predic-tions.It indicates that the model can well predict the Cr(Ⅵ) adsorption on GAC.In the scope of experiments, the optimization for minimum dosage of GAC which removed maximum Cr(Ⅵ) is studied.The optimum pH, temperature, adsorbent dose and initial concentration are found by desirability function to be 2, 45 ℃, 1.38 g/L and 300.05 mg/L, respectively.The error between the forecasted value ( 72.38%) and the average re-moval rate of Cr(Ⅵ) (72.08%) is 0.415%.