摘要
研究了用氧化钙(CaO)改性磷石膏(PG)制备吸附剂m-CaO-PG,并用于从废水中吸附去除As(Ⅴ),采用Design-Expert软件以响应面法中的Box-Behnken程序优化m-CaO-PG制备工艺,考察了球磨转速、球磨时间和物料质量比对m-CaO-PG吸附As(Ⅴ)的影响。结果表明:制备m-CaO-PG的最佳条件为球磨转速200 r/min,物料质量比6/4,球磨时间4 h;m-CaO-PG对As(Ⅴ)的最大吸附量为37.75 mg/g;吸附过程中产生了Ca_(3)(AsO_(4))_(2)和CaHAsO_(4)·2H_(2)O新物相,新物相中增加了羟基自由基;m-CaO-PG有更大表面积和孔隙体积,吸附去除As(Ⅴ)效果较好。
The preparation of m-CaO-PG adsorbent by modifing phosphogypsum(PG) using calcium oxide and used to adsorb As(Ⅴ) from wastewater was studied.The preparation process was optimized by Box-Behnken program of response surface method by Design-Expert software.The effects of ball milling speed, milling time, and material mass ratio on adsorption capacity of m-CaO-PG for As(Ⅴ) were investigated.The results show that the optimum conditions for preparation m-CaO-PG are ball milling speed of 200 r/min, material mass ratio of 6/4,ball milling time of 4 h.The maximum adsorption capacity of m-CaO-PG for As(Ⅴ) is 37.75 mg/g.During adsorption process, new phases Ca_(3)(AsO_(4))_(2)and CaHAsO_(4)·2H_(2)O generate, and hydroxyl radical is added into the new phase.m-CaO-PG has larger surface area and pore volume, and can be used to remove As(Ⅴ).
作者
哈志昊
许向群
谭小涵
蓝艳馨
林燕敏
马梦雨
杜亚光
HA Zhihao;XU Xiangqun;TAN Xiaohan;LAN Yanxin;LIN Yanmin;MA Mengyu;DU Yaguang(Hubei Engineering Research Center for Prevention and Control of Heavy Metal Pollution,College of Resources and Environment,South-central Minzu University,Wuhan 430074,China;Key Laboratory of Catalytic Conversion and Energy Materials Chemistry,Ministry of Education,South-central Minzu University,Wuhan 430074,China;School of Xingfa Mining Engineering,Wuhan Institute of Technology,Wuhan 430074,China)
出处
《湿法冶金》
CAS
北大核心
2023年第1期76-82,共7页
Hydrometallurgy of China
基金
湖北省重大科技创新项目(2019ACA156),湖北三峡实验室开放基金资助项目(SK211010)。
