| 罗隽,雷育涛,丘锦荣,谌建宇,庞志华,赵英,张佳琳.新型粉煤灰陶粒对水中Cu(Ⅱ)的去除特性及吸附等温模拟[J].广东农业科学,2014,41(21):159-164 |
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新型粉煤灰陶粒对水中Cu(Ⅱ)的去除特性及吸附等温模拟 |
| Characteristics of Cu(Ⅱ) removal in wastewater by new fly ash ceramisite and its adsorption isotherm simulation |
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| DOI： |
| 中文关键词: 粉煤灰陶粒 Cu 吸附 去除特性 等温模拟 |
| 英文关键词: fly ash ceramsite Cu adsorption removal characteristics isotherm simulation |
| 基金项目:环保公益性行业科研专项（201209048）；粤港关键领域重点突破项目（2009A030902002） |
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| 中文摘要: |
| 以粉煤灰、膨润土等制备新型粉煤灰陶粒，考察粉煤灰陶粒对溶液中Cu(Ⅱ)的去除特性并进行吸附等温线拟合。结果表明，粉煤灰陶粒对Cu(Ⅱ)的去除主要为吸附过程，对Cu(Ⅱ)的吸附效果与陶粒用量、温度及振荡速度有关，较大的粉煤灰陶粒用量、适宜的温度及振荡有较好的Cu(Ⅱ)去除效果。当温度为25℃、pH4.5及振荡速度150 r/min 时，2.00g粉煤灰陶粒对50 mL 溶液中浓度为100mg/L 的Cu(Ⅱ)去除率为100%，而同等条件下两种普通市售陶粒的Cu(Ⅱ)去除率分别只有14.6%、6.3%。陶粒吸附柱可连续4次对250mL浓度为100mg/L 的Cu(Ⅱ)去除率达90%以上。25℃时粉煤灰陶粒对Cu （Ⅱ）的最大吸附量为2.78 mg/g，其吸附过程符合Langmuir 等温式，以Freundlich 吸附等温式拟合则相关性较差。 |
| 英文摘要: |
| A new kind of fly ash ceramsite was made with fly ash and bentonite. This paper studied the characteristics
of the new fly ash ceramsite on the removal of Cu (Ⅱ) in wastewater and its adsorption isotherm simulation. The results
showed that adsorption was the main process of Cu(Ⅱ) removal. The adsorption effect of Cu (Ⅱ) was related to the amount
of ceramic, temperature and oscillation. Better removal of Cu (Ⅱ) could be attained with the larger amount of fly ash
ceremsite, appropriate temperature and oscillation. The Cu (Ⅱ) removal rate could reach 100% with the pH4.5, 25℃, 150
r/min and 2.00 g ceramsite, when the wastewater was 50 mL and the concentration was 100 mg/L, while the removal rate of
two kinds of ordinary ceramsites was only 14.6% and 6.3% under the same conditions. The Cu (Ⅱ) removal rate of the
ceramsite adsorption column could reach 90% above for 4 times continuously. The maximum adsorption capacity of Cu (Ⅱ)
was 2.78 mg/g. The adsorption process accorded with Langmuir adsorption isotherm, rather than Freundlich adsorption
isotherm. |
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