摘要
以污泥与含磷试剂(磷酸二氢钾、磷酸二氢钙)为原料制备磷基生物炭(BC600、BC650)并用于废水中Pb^(2+)的去除。通过单因素静态吸附实验分别研究了吸附剂添加量、含Pb^(2+)废水初始p H、浓度和吸附时间等对BC600和BC650吸附水中Pb^(2+)的影响。结果表明,含Pb^(2+)废水初始p H显著影响BC600和BC650的吸附效率,在p H=5时,BC600和BC650的吸附量分别为37 mg/g和10 mg/g。吸附动力学和吸附等温模型拟合结果表明BC600符合二级动力学模型和Langmuir吸附等温模型,BC650符合一级动力学模型和Freundlich吸附等温模型。结合XRD与SEM分析,BC600和BC650对Pb^(2+)的吸附过程包含物理-化学吸附协同作用,其中BC600以化学吸附为主,BC650以物理吸附为主。
Phosphorus-based biochars(BC600,BC650)were prepared from sludge and phosphorus containing reagents(potassium dihydrogen phosphate,calcium dihydrogen phosphate)and used to remove Pb;from wastewater.The effects of adsorbent dosage,initial pH,concentration,and adsorption time on Pb;adsorption by BC600 and BC650 were investigated using a single factor static adsorption experiment.Results indicated that the initial pH of Pb;wastewater had a significant effect on the adsorption efficiency of BC600 and BC650.When the pH was 5,the adsorption capacity of BC600 and BC650 were 37 mg/g and 10 mg/g,respectively.Adsorption kinetic and isotherm fitting models revealed that BC600 accorded with the second-order kinetic and Langmuir adsorption isotherm model,while BC650 accorded with the first-order kinetic and Freundlich adsorption isotherm model.XRD and SEM analyses indicated that the adsorption process of phosphorus-based biochar was the synergic action of physics and chemistry adsorption,of which BC600 mainly showed chemical adsorption and BC650 mainly showed physical adsorption.
作者
张世杰
顾卫华
白建峰
董滨
庄绪宁
赵静
ZHANG Shijie;GU Weihua;BAI Jianfeng;DONG Bin;ZHUANG Xuning;ZHAO Jing(School of Resources and Environmental Engineering,Shanghai Polytechnic University,Shanghai 201209,China;College of Environment,Zhejiang University of Technology,Hangzhou 310014,China;College of Environmental Science and Engineering,Tongji University,Shanghai 200092,China)
出处
《工业水处理》
CAS
CSCD
北大核心
2022年第2期111-117,共7页
Industrial Water Treatment
基金
国家重点研发计划专项(2019YFC1906100)
国家自然科学基金项目(51578397)
上海市Ⅱ类高原学科-资源循环科学与工程。
关键词
污泥
热解
磷基生物炭
吸附效率
含铅废水
sludge
pyrolysis
phosphorus-based biochar
adsorption efficiency
Pb^(2+)containing wastewater
