采用化学共沉淀法将四氧化三铁和磷酸活化过的黑藻生物炭复合,制备磁性黑藻生物炭复合材料,并将其应用于水体中Cu2+的吸附研究。探究了吸附剂添加量、吸附时间、溶液pH、Cu2+的初始浓度以及温度对复合材料吸附性能的影响,对比了该材料与商业活性炭对Cu2+的吸附能力。结果表明,磁性黑藻生物炭复合材料吸附Cu2+的较优条件为:吸附剂的添加量为0.1g,吸附时间为30min,pH为6,温度为30℃,Cu2+初始浓度为50mg/L。最佳工艺条件下吸附率为97.12%,吸附量为24.28mg/g,是等量商业活性炭的2.52倍。该磁性复合材料制备工艺简单,吸附迅速,回收方便,对水体中的Cu2+显示了高效的吸附性能,可为水体重金属污染治理提供理论参考。
Chemical coprecipitation method was used to compound ferric oxide and phosphoric acid activated black algae biochar to prepare magnetic black algae biochar composite material,and the new material was applied to the adsorption of Cu2+ in water.The effects of the amount of adsorbent,adsorption time,solution pH,initial concentration of Cu2+and temperature on the adsorption performance of the material were explored,and the adsorption capacity of the material and commercial activated carbon for Cu2+ was compared.The results showed that the optimal conditions for the adsorption of Cu2+ by the material were:the addition amount of the adsorbent was 0.1g,the adsorption time was 30min,pH=6,the initial concentration of copper ion was 50mg·L-1 and the temperature was 30℃.At this time,the adsorption rate was up to 97.12%,and the adsorption capacity was 24.28mg·g-1,which was 2.52 times that of commercial activated carbon.The material had the advantages of simple preparation process,rapid adsorption and convenient recovery,and shown efficient adsorption performance for Cu2+ in water.The results provided a theoretical reference for the treatment of heavy metal pollution in water.
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