为了经济实用地对废水进行处理,将来源广泛的黑藻制成粉末加入到含铜、镍离子的废水中,研究了其对废水中铜、镍离子的吸附作用,考察了溶液pH值、金属离子初始浓度、吸附剂用量、吸附时间和干扰离子等因素对吸附性能的影响.结果表明:黑藻吸附2种重金属离子的速度快,30 min即达到吸附平衡,适宜的pH值为5.0～6.0,干扰离子对Ni2+的影响大于对Cu2+的影响;黑藻对2种重金属的吸附均符合Langmiur,FreunoUich和Dubinin-Radushkevich(D-R)模型,对2种金属离子的吸附能力顺序是:Cu2+>Ni2+.
The adsorption behavior of Hydrilla Verticillata for Cu2+ and Ni2+ in wastewater was studied. The effects of pH value of the wastewater, initial con-centration of metal ions, dosage of the biosorbent, contact time and interference ions on the adsorption behavior were studied. It was found that Hydrilla Verticillata was able to adsorb the two kinds of heavy metal ions, and the adsorption reached balance 30 min later. The suitable pH value for adsorption was 5.0, and mixed-metal ions had a larger effect on the adsorption behavior of Hydrilla Verticillata for Ni2+ than for Cu2+. Moreover, the ad-sorption behavior of Hydrilla Verticillata for Ni2+ and Cu2+ could be fitted by using Langmiur, Freundlich and D-R equations. The order of adsorption capacity was ranked as Cu2+ > Ni2+.
参考文献
| [1] | Deng L P;Zhu X B;Wang X T et al.Bisorption of copper(Ⅱ) from aqueous solutions by green alga Cladophora fascicularis[J].Biodegradation,2007,18:393-402. |
| [2] | Carlos G R;Victor R T;Bruno G G .Cadmium and zinc removal from aqueous solutions by Bacillus jeotgali:pH,salinity and temperature effects[J].Bioresource Technology,2008,99:3864-3870. |
| [3] | Ramiro J E M;Rosana P;Rui A R B .Cadmium (Ⅱ)and zinc (Ⅱ) adsorption by the aquatic moss fontinalis antipyretiea:effect of temperature,pH and water hardness[J].Water Research,2004,38:693-699. |
| [4] | Ho YS .Effect of pH on lead removal from water using tree fern as the sorbent[J].Bioresource Technology: Biomass, Bioenergy, Biowastes, Conversion Technologies, Biotransformations, Production Technologies,2005(11):1292-1296. |
| [5] | Teixeira C R;Arruda M A Z .Adsorption of heavy metals using flee milling by-products.Charaeterisation and application for removal of metals from aqueous effluents[J].Chemosphere,2004,54:987-995. |
| [6] | 程国斌,张延红,马伟,韩梅,王刃.沸石吸附钾离子的热力学研究[J].离子交换与吸附,2005(05):385-390. |
| [7] | Cabuk A;Akar T;Tunali S et al.Adsorption of Cu,Ni(Ⅱ) by industrial strain of Saccharomyees cerevisiae immobilized on the biomatrix of cone biomass of Pinus nigra:Equilized and mechanism analysis[J].Chemical Engineering Journal,2007,131:293-300. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%