摘要
利用固体废物赤泥和铜渣作为原料制备功能型陶粒,研究了功能型陶粒对磷的吸附性,考察了陶粒烧制温度、添加剂用量、陶粒投加量、初始pH、吸附反应时间和磷初始质量浓度对除磷率的影响。结果表明,陶粒的最佳配比为:赤泥、铜渣与膨润土的质量比为5∶1∶4,CaCO_(3)添加量为30%。最佳制备工艺为:将原料混合的生球烘干,在400℃下保温10 min后,继续升温至1100℃保温30 min。对于100 mL磷初始质量浓度为2μg/mL磷溶液,在pH为2,陶粒投加量为9 g/L,吸附反应时间为12 h,对磷的吸附效果最佳,除磷率为96.67%。X射线衍射(XRD)和扫描电镜-X射线能谱(SEM-EDS)分析结果表明,最佳条件下制备的陶粒主要矿物成分为钙铁榴石、镁黄长石和钙铝黄长石。
Functional ceramsite was prepared using solid waste red mud and copper slag as raw materials,and its phosphorus adsorption was studied.The effects of firing temperature,additive,ceramsite dosage,initial pH,adsorption reaction time and initial phosphorus concentration on the phosphorus removal rate were investigated.The results showed that the optimal ratio of functional ceramsite was 5∶1∶4 of achieved by mixing red mud,copper slag,and bentonite,and adding 30%CaCO_(3).The best preparation process was to dry the raw materials mixed with green balls,hold them at 400℃for 10 min,and then heat up to 1100℃for 30 min.For 100 mL phosphorus solution with an initial concentration of 2μg/mL,the adsorption effect of ceramsite particles was the best when the initial pH was 2,the dosage of ceramsite was 9 g/L,the adsorption reaction time was 12 h,and the phosphorus removal rate was 96.67%.The XRD and SEM-EDS indicated that the main mineral components of the ceramsite were andradite,akermanite and gehlenite.
作者
张潇
蔡佳星
曹允业
Zhang Xiao;Cai Jiaxing;Cao Yunye(School of Materials Science and Chemical Engineering,Ningbo University,Ningbo,Zhejiang 315211;State Key Laboratory of Mineral Processing Science and Technology,Beijing 100160)
出处
《非金属矿》
2024年第2期1-4,共4页
Non-Metallic Mines
基金
浙江省自然科学基金(LQ21E040002)
矿物加工科学与技术国家重点实验室开放基金(BGRIMM-KJSKL-2020-25)。
关键词
赤泥
铜渣
功能型陶粒
除磷率
red mud
copper slag
functional ceramsite
phosphorus removal rate
