柚皮残渣制备活性炭对Cu2+吸附性能

以柚皮为材料，提取柚皮苷后残渣制备柚皮基活性炭（简称PPAB），研究其在不同pH、投加量、吸附质浓度、时间、温度、粒径、解吸剂条件下对水中Cu2+的吸附性能.结果表明:在pH值为6，PPAB投加量4 g/L，溶液温度35 ℃，Cu2+初始浓度30 mg/L，吸附60 min，PPAB对Cu2+去除率94.47 %，最大吸附容量7.09 mg/g；0.25 mol/L盐酸脱附Cu2+效果较优，回收率98.21 %.吸附过程Langmuir等温式能较好拟合，此工艺下PPAB平均得率36.9 %，比表面积高达1 764 m2/g.柚皮基活性炭作为吸附剂处理低浓度重金属废水具有广阔前景. 

Cu2+ adsorption properties of activated carbon prepared by pomelo peel residue

Pomelo peel-based activated carbon (PPAB) was prepared from the residue after extracting naringin. The adsorption performance for Cu2+ in solution was studied under different pH, density, adsorbate concentration, time, temperature, adsorbent particle size and desorption agent. The results showed that the removal rate of PPAB for Cu2+ was 94.47 %, and the maximum adsorption capacity was 7.09 mg/g under the conditions of the pH 6, the density of PPAB 4 g/L, the initial concentration of Cu2+ 30 mg/L, the temperature 35 ℃ and the time 60 min. The effect of 0.25 mol/L hydrochloric acid desorption for Cu2+ was the best, and the recovery rate was 98.21 %. The Langmuir isotherm could be well fitted in the adsorption process. The average yield of PPAB was 36.9 %, and the specific surface area was up to 1 764 m2·g-1. PPAB has broad prospects as adsorbent for the treatment of wastewater with low concentration heavy metals.