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研究了滩涂污灌土壤吸附剂的制备方法。通过正交实验,比较了氯化锌、磷酸、氢氧化钾、盐酸几种活化剂在不同秸秆加入量、活化剂浓度、活化时间、活化温度的情况下制备的吸附剂,对水中邻硝基甲苯的吸附效果影响。实验结果表明,选择盐酸活化法制备吸附剂,在秸秆加入量为15%,经2 mol/L的盐酸按液固比为1∶1浸泡处理滩涂污灌土壤后,用氮气做保护气在400℃的条件下碳化1 h,制备的土壤吸附剂对水中邻硝基甲苯的吸附效率可以达到90%以上。
The preparation method of soil adsorbent for sewage treatment was studied. Through orthogonal experiment, the adsorbents prepared by adding different activators of zinc chloride, phosphoric acid, potassium hydroxide and hydrochloric acid under different straw addition, activator concentration, activation time and activation temperature were compared. Toluene adsorption effect. The experimental results show that the preparation of adsorbent by hydrochloric acid activation method, the amount of straw added 15%, 2mol / L hydrochloric acid at a liquid to solid ratio of 1: 1 soaked tidal flat irrigation soil, with nitrogen as the protective gas at 400 ℃ for 1 h, the adsorption efficiency of the prepared soil adsorbent to o-nitrotoluene in water can reach more than 90%.