【摘要】 本文探讨了花生壳对水中重金属离子的吸附特性,绘制出吸附等温线,并由Langmuir曲线求出吸附平衡常数b及饱和吸附量q_∞,由Freundlich式求出两个经验常数K和1/n。进行了处理花生壳与未处理花生壳及活性炭吸附性能的比较。又对氨水、抗坏血酸、EDTA等存在时花生壳对重金属离子吸附能力的影响进行了研究。在pH4.5～6.0时,于相同操作条件下,对欲测定的几种重金属离子分别进行6～8次实验,当离子浓度在0.4～1.6ppm范围内,其吸附率均在93.8％以上,相对标准偏差为0.67～2.37％。更多还原

【Abstract】 The paper has made a thorogh inquiry into the absorption properties of metal ions by treated peanut shell. A method to collect several metal ions in aqueous solution with peanut shell was designed. The peanut shell powder was treated with formalin in a dilute sulfuric acid and then activated. An absorption isotherm was determined. The absorption equilibrium constant (b) and the maximum absorption quantity (q∞) were found according to the Langmuir equation,also the constant K and 1 / n in Freundlich equation determined. The absorption properties of treated peanut shell, untreated peanut shell and active carbon were compared. In the presence of ammonia, ascorbic acid, and EDTA, the collection efficioncy of treated peanut shell was examined separately. Under the same pH4.5-6.0 condition, when the ion concentrations kept in the range of 0.4-1.6ppm, the absorption efficiency reached 93.8%. The relative standard deviation is 0.67-2.37%.更多还原