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以海泡石为吸附剂,吡虫啉农药溶液为吸附对象,首先研究活化温度对吡虫啉溶液吸附率的影响,确定了最佳活化温度为300℃,此时吡虫啉溶液的吸附率为18.18%。然后以该最佳活化条件下的海泡石为吸附剂.分别研究吸附时间、农药初始浓度、海泡石用量对吡虫啉溶液吸附率的影响。研究表明:海泡石具有较快的吸附速度,1 h左右即达到了吸附平衡。海泡石用量与吸附率之间存在对数增长关系,可用公式表示为y=0.184 7 Ln(x)+0.177 1,R~2=0.987 9(y为农药吸附率,x为海泡石用量)。农药初始浓度越大,吸附效果越好,当浓度为40μg/mL时,达到最大吸附率。
With sepiolite as adsorbent and imidacloprid pesticide solution as adsorption target, we first studied the influence of activation temperature on the adsorption rate of imidacloprid solution. The optimum activation temperature was 300 ℃. The adsorption rate of imidacloprid solution was 18.18%. Then the sepiolite under the optimal activation conditions was used as adsorbent.The effects of adsorption time, initial concentration of pesticides and dosage of sepiolite on adsorption rate of imidacloprid solution were studied respectively. The results show that the sepiolite has a faster adsorption rate, which reaches adsorption equilibrium in about 1 h. There is a logarithmic increase relationship between the amount of sepiolite and the adsorption rate, which can be expressed as y = 0.184 7 Ln (x) +0.177 1, R ~ 2 = 0.987 9 (y is pesticide adsorption rate, x is the amount of sepiolite ). The higher the initial concentration of pesticides, the better the adsorption effect. When the concentration is 40μg / mL, the maximum adsorption rate is reached.