摘要
利用羟基氧化铁的吸附特性可以有效脱除水体中的重金属,考察在不同条件下的脱砷效果。采用浆态床脱除法进行评价实验,主要考察废液砷含量、p H、温度、羟基氧化铁浓度和震荡时间等对脱砷率的影响。结果表明,废液砷含量和p H对脱砷率影响较小,时间、温度及羟基氧化铁浓度对脱砷率影响较大,羟基氧化铁浓度为影响脱砷效果的主要因素,整体来看,脱除率较高。在羟基氧化铁浓度为150 mg·m L-1、震荡时间1 h和温度50℃条件下,可将初始砷含量176.00 mg·L-1的废水降至砷含量为5.46 mg·L-1。
The adsorption properties of hydroxy iron oxide can be used for removing heavy metals in water body effectively. The effects of arsenic removal under different conditions were focused on in this paper.The evaluation experiments were carried out by slurry bed method. The influence of arsenic contents and p H values of waste liquid,iron oxyhydroxide concentration,removal time and temperatures on arsenic removal rate was investigated. The results showed that arsenic contents and p H value of waste liquid had little effect on removal rate of arsenic,and removal time,temperatures and hydroxy ferric oxide concentration had great influence on arsenic removal rate. The hydroxyl ferric oxide concentration was the main influence factor of removing arsenic. On the whole,arsenic removal rate was high. The arsenic content of waste liquid could be dropped from 176. 00 mg·L- 1to 5. 46 mg·L- 1under the optimal removal condition as follows： hydroxy ferric oxide concentration 150 mg· m L- 1,removal time 1 h and temperature 50 ℃.
出处
《工业催化》
CAS
2015年第9期729-732,共4页
Industrial Catalysis
关键词
催化化学
羟基氧化铁
高比表面积
重金属
砷
catalytic chemistry
iron oxyhydroxide
high specific surface area
heavy metal
arsenic
