| 查看: 801 | 回复: 13 | |||
| 当前主题已经存档。 | |||
| 当前只显示满足指定条件的回帖，点击这里查看本话题的所有回帖 | |||
commandos2银虫 (小有名气)
|
[交流]
求高手帮忙修改修改文章啊
|
||
|
因为英语不过关，已经被退回来了，是关于COD废水处理方面的，小虫金币不多，就全发了。谢谢了！ 文章 ACFM-chemo.doc 文章+图 pdf CHEM-S-09-00528.fdf |
回复此楼» 猜你喜欢
材料专业344求调剂
已经有19人回复
-
085404 298分求调剂
已经有11人回复
-
296求调剂
已经有7人回复
-
初试261
已经有6人回复
-
284求调剂
已经有9人回复
-
材料085601调剂
已经有25人回复
-
272分材料子求调剂
已经有23人回复
-
22408调剂求助
已经有7人回复
-
调剂
已经有17人回复
-
材料类284调剂
已经有43人回复
commandos2
银虫 (小有名气)
- 应助: 0 (幼儿园)
- 金币: 3822.2
- 散金: 95
- 帖子: 193
- 在线: 107.3小时
- 虫号: 580992
- 注册: 2008-07-18
- 专业: 海洋地质学
|
再来帮忙修改修改实验的一个部分吧，是COD随样品用量的变化的。75金币 3.2. Effect of sample dosage on the COD of wastewater Fig. 3 shows the effect of sample dosage ranging from 0.0 to 20 mg•mL-1 on the COD removal of wastewater. The COD removal increases significantly with the dosage of RHM or RHA when the dosage was less than 20 mg•mL-1. Thereafter, the COD removal changes slightly and maintains at 73% (RHM) or 66% (RHA). Compared with RHA, the COD removal of RHM is much higher at identical dosages. For instance, the COD removal of RHM is ~18% higher than that of RHA when the sample dosage was 5 mg•mL-1. Moreover, the maximum COD removal of RHM (73.5%, at dosage of 15 mg•mL-1) is ~7% higher than that of RHA (66.5%, at dosage of 25 mg•mL-1). Because the surface area of RHA (433.90 m2•g-1) is twice as RHM (214.54 m2•g-1), RHA should present stronger adsorption ability than that of RHM. Therefore, the catalytic ability of RHM is stronger than that of RHA, attributed to the presence of MnFe2O4. Organics was adsorbed to the surface of RHM and then catalytic degraded by the ferrite nanoparticles during the wastewater treatment, which is consistent with former researches [38, 41] . 3.3. Effect of microwave treatment on the COD of wastewater Fig. 4 shows the variations of the COD of wastewater as a function of microwave heating time. When the wastewater was treated by 20 mg•mL-1 RHM or RHA without microwave heating, the COD removal is as low as less than 7%, which is attributed to the inadequate contract between RHM and organics. When the microwave radiation was added, the COD removal starts to increase significantly. The COD removal increases considerably in the first 3 min, from 41% to 72% for RHM and 19% to 60% for RHA. Thereafter, the COD removal changes little and maintains at ~73% for RHM and ~65% for RHA. The microwave treatment reveals that both RHM and RHA will reach theirs maximum COD removal within 6 min under the assist of microwave radiation. It is contributed to two reasons. First, microwave radiation will selective heat and motivate some special materials such as active carbon and magnetic materials to be hotspots [43] . These hotspots adsorb and catalytic degrade the organics of wastewater rapidly. Second, the quantum energy of microwave can motivate the rotation of molecules and decrease the activation energy of reactions, which facilitate the breaking of chemical bonds and the adsorption of RHM or RHA for organics [31, 44] . Note that RHM reaches its maximum COD removal earlier than RHA and the COD removal of RHM is higher than that of RHA at all periods, indicating that RHM is easier to be heated by the microwave radiation. It is still attributed to the presence of MnFe2O4. [ Last edited by commandos2 on 2009-3-13 at 11:33 ] |
9楼2009-03-13 11:32:29
caitikuan
木虫 (小有名气)
- 应助: 0 (幼儿园)
- 金币: 2243.1
- 帖子: 229
- 在线: 102小时
- 虫号: 518882
- 注册: 2008-03-05
- 性别: GG
- 专业: 器官移植与移植免疫
2楼2009-03-05 23:07:28
3楼2009-03-05 23:19:42
commandos2
银虫 (小有名气)
- 应助: 0 (幼儿园)
- 金币: 3822.2
- 散金: 95
- 帖子: 193
- 在线: 107.3小时
- 虫号: 580992
- 注册: 2008-07-18
- 专业: 海洋地质学
4楼2009-03-06 11:17:59
