摘要
研究了以活性炭净化废硫酸及浸出碳酸锰矿石中的锰。考察了吸附温度、吸附时间、活性炭用量、废硫酸初始浓度、搅拌速度对废硫酸COD去除率的影响,通过响应面试验获得适宜工艺条件,采用SEM、XRD和FT-IR探讨活性炭吸附机制。结果表明:在废硫酸初始浓度4.70mol/L、搅拌速度100r/min条件下,各因素对活性炭处理废硫酸的影响顺序为活性炭用量>吸附温度>吸附时间;吸附过程的回归数学模型为y=86.44+1.52a+2.04b+5.44c+0.58ab+0.84ac+0.32bc-2.09a^2-1.91b^2+0.78c^2;针对7.91g废硫酸,在活性炭加入量3.9g、吸附时间34min、反应温度74℃适宜条件下,COD去除率达92.01%;吸附过程为物理吸附。
Waste sulfuric acid from petroleum processing was purified using activated carbon and used for leaching of manganese from manganese carbonate ore. Effect of temperature, adsorption time, activated carbon dosage, as well as initial sulfuric acid concentration and stirring rate on removal of COD were examined. The experimental conditions were optimized by tests and response surface method. The adsorption mechanism of the actinated carbon for COD was studied by scanning electron microscope (SEM),X-ray diffraction (XRD) and fourier transform infrared spectroscopy(FT-IR). The results show that the main influence factors on removal of COD in sequence are activated carbon dosage,temperature and adsorption time under the conditions of initial sulfuric acid concentration of 4.70 mol/L and stirring rate of 100 r/min. The regression mathematical model of the adsorption process is y=86.44+1.52a+2.04b+5.44c+0.58ab+0.84ac+0. 32bc-2.09a2 -1. 91b2 +0. 78c2. Under the optimization condition of ctivated carbon dosage of 3.9 g,temperature of 74 ℃ and adsorp tion time of 34 min,the removal of COD is 92.01%. The adsorption process is a physical process.
作者
梁静珍
吴晓丹
陈南雄
黄增尉
周泽广
袁爱群
覃慧玲
陈福康
明宪权
李维健
马少妹
韦冬萍
LIANG Jingzhen1 ,WU Xiaodan2 ,CHEN Nanxiong2 , HUANG Zengwei1 , ZHOU Zeguang1 ,YUAN Aiqun1 ,QIN Huiling1 ,CHEN Fukang1 , MING Xianquan1 , LI Weijian2 , MA Shaomei1 ,WEI Dongping1(1. School of Chemistry and Chemical Engineering ,Guangxi University for Nationalities, Nanning 530006,China; 2. CITIC Dameng Mining Industries Limited ,Nanning 530022,Chin)
出处
《湿法冶金》
CAS
北大核心
2018年第2期95-100,共6页
Hydrometallurgy of China
基金
国家自然基金资助项目(21666006)
广西民族大学研究生教育创新计划项目(gxun-chxps201679)
关键词
活性炭
废硫酸
碳酸锰
COD
去除率
activated carbon
waste sulfuric acid
manganese carbonate ore
COD
removal