摘要
以钢渣作为水中Pb^(2+)的处理剂,通过改变钢渣粒径、填料层高度、进液流量和初始Pb^(2+)含量,对动态吸附过程进行实验研究,得到相应的柱参数和穿透曲线,并采用BDST模型对动态实验数据进行拟合。结果表明,增大钢渣粒径、降低柱高、增大流量、增加初始Pb^(2+)含量均会使吸附柱的穿透时间提前;粒径、填料层厚度、进液流量、初始Pb^(2+)含量的增加均会延长传质区长度。各操作条件下单位动态吸附量在32.21~110.5 mg/g,单位动态吸附量随填料层厚度和初始Pb^(2+)含量的增加而增加,随进液流量的增加而减少。吸附柱效率维持在51.15%以上。实验研究的结果可用BDST模型很好地拟合(R^2≥0.95)。
Steel slag was used to remove lead ions from simulated lead-acid battery factory wastewater using an upflow-water column. The effects of influencing factors such as particle size of steel slag, bed height, flow rate and lead Pb2＋ concent were studied and the corresponding parameters of fixed-bed and breakthrough curves were obtained. The bed depth service time（BDST） model were applied to simulate fixed-bed adsorption date and the characteristic parameters of the BDST model was gained by linear regression. The results showed that the breakthrough time would be shortened by increasing particle size, flow rate, lead Pb2＋ concent and decreasing bed height. The height of mass transfer zone were extended by increasing particle size, bed height, flow rate and lead Pb2＋ concent. The maximum absorption capacity of lead was between 32.21～110.5 mg/L and was increased by increasing bed height, lead Pb2＋ concent and reduced by increasing flow rate. The column efficiency maintained more than 51.15%. The column adsorption data at different conditions fitted fairly well with BDST model（R2≥0.95）.
出处
《水处理技术》
CAS
CSCD
北大核心
2016年第5期63-68,共6页
Technology of Water Treatment
基金
江苏省科技支撑计划项目(BE2013085)
