CAJ | 학술논문

以KOH为活化剂进行两段式活化程序,将废弃生物质材料转化为活性炭,并评估此活性炭吸对液相中农药(呋喃丹)的去除能力。结果表明,此活性炭具有大比表面积与高吸附能力可快速有效地去除液相中的呋喃丹。吸附前后的活性炭用扫描电子显微镜、元素分析仪与傅里叶变换红外光谱仪进行特征分析。活性炭的比表面积与平均孔径分别为1304.8 m2/g与2.39 nm。同时对不同的吸附参数进行批次分析,包括呋喃丹初始浓度,吸附时间、温度与酸碱度。最大吸附量(296.52mg/g)的吸附参数为90min、30益、吸附剂剂量100mg/L、180r/min、呋喃丹初始浓度200mg/L。根据三种平衡吸附等温线( Langmuir, Freundlich and Temkin)与动力学分析,Langmuir模式最符合此活性炭的吸附结果,伪二级动力学方程可预测此活性炭的吸附动力学。
이KOH위활화제진행량단식활화정서,장폐기생물질재료전화위활성탄,병평고차활성탄흡대액상중농약(부남단)적거제능력。결과표명,차활성탄구유대비표면적여고흡부능력가쾌속유효지거제액상중적부남단。흡부전후적활성탄용소묘전자현미경、원소분석의여부리협변환홍외광보의진행특정분석。활성탄적비표면적여평균공경분별위1304.8 m2/g여2.39 nm。동시대불동적흡부삼수진행비차분석,포괄부남단초시농도,흡부시간、온도여산감도。최대흡부량(296.52mg/g)적흡부삼수위90min、30익、흡부제제량100mg/L、180r/min、부남단초시농도200mg/L。근거삼충평형흡부등온선( Langmuir, Freundlich and Temkin)여동역학분석,Langmuir모식최부합차활성탄적흡부결과,위이급동역학방정가예측차활성탄적흡부동역학。
Activated carbon was prepared from rice straw by carbonization and KOH activation, and was used as an adsorbent for the removal of a kind of pesticide, carbofuran (2,3-dihydro-2,2-dimethylbenzofuran-7-yl methylcarbamate) from aqueous solution. The effects of the initial carbofuran concentration, contact time, temperature and pH, on its adsorption capacity and kinetics were studied using a batch method. The surface area and average pore diameter of the activated carbon were 1304. 8 m2/g and 2. 39 nm, respectively. The maximum adsorption capacity of the activated carbon (296. 52 mg/g) for carbofuran was found to occur at 90 min, 30℃ and 200 mg/L initial carbofuran concentration with an adsorbent loading of 100 mg/L. Equilibrium adsorption isotherms were fitted better by the Langmuir model than the Freundlich and Temkin models. The adsorption follows a pseudo-second-order kinetics model.