论文部分内容阅读
利用Fenton活化法活化脱水污泥制备活性炭,研究了Fenton试剂投加量、活化时间、炭化温度、炭化时间和升温速率5种因素对制备污泥炭的影响。污泥炭的最佳制备工艺:Fenton试剂投加量为150 m L,活化时间为2.5 h,炭化温度为350℃,炭化时间为1 h,升温速率为20℃·min-1。污泥炭碘吸附值达到331.90 mg·g-1,BET比表面积为24.265 m~2·g-1。总孔容为0.146 cm~3·g-1,微孔率为17%。分析了吸附时间、pH值和吸附温度3种因素对污泥炭吸附水中Cr(Ⅵ)的影响。在吸附时间为90 min,pH=3,吸附温度为50℃时,污泥炭对Cr(Ⅵ)的吸附量为9.93 mg·g-1。吸附动力学符合准二级动力学模型描述,吸附过程符合Langmuir和Tempkin等温吸附模型描述。
Activated carbon was activated by dehydration sludge activated by Fenton activation method. The effects of Fenton reagent dosage, activation time, carbonization temperature, carbonization time and heating rate on the preparation of activated sludge were studied. The best preparation technology of sludge carbonaceous was as follows: Fenton reagent dosage was 150 m L, activation time was 2.5 h, carbonization temperature was 350 ℃, carbonization time was 1 h, heating rate was 20 ℃ · min-1. The iodine adsorption value of sludge reached 331.90 mg · g-1, and the BET specific surface area was 24.265 m ~ 2 · g-1. The total pore volume is 0.146 cm ~ 3 · g-1 and the microporosity is 17%. The effects of adsorption time, pH value and adsorption temperature on Cr (Ⅵ) adsorption in sludge carbon were analyzed. When the adsorption time was 90 min, pH = 3 and the adsorption temperature was 50 ℃, the adsorption capacity of sludge carbon to Cr (Ⅵ) was 9.93 mg · g-1. The adsorption kinetics is in accordance with the quasi-second-order kinetic model. The adsorption process is in accordance with the Langmuir and Tempkin isotherm model.