| 孙晨敏,邵继海,匡晓琳.牛粪中溶解性有机质对周丛生物吸附Cu（Ⅱ）特性的影响[J].农业环境科学学报,2020,39(3):648-655. |
| 牛粪中溶解性有机质对周丛生物吸附Cu（Ⅱ）特性的影响 |
| Effects of dissolved organic matter on the adsorption characteristics of Cu(Ⅱ)by periphyton |
| 投稿时间：2019-10-15 |
| DOI：10.11654/jaes.2019-1135 |
| 中文关键词: 周丛生物 溶解性有机质 铜 吸附 |
| 英文关键词: periphyton dissolved organic matter copper adsorption |
| 基金项目:国家自然科学基金项目（31470511）；长沙市环境生物技术修复工程技术中心项目（kq1801025） |
|
| 摘要点击次数: 2276 |
| 全文下载次数: 1544 |
| 中文摘要: |
| Cu（Ⅱ）和畜禽粪便中溶解性有机质（Dissolved organic matter，DOM）常共存于养殖废水，为了阐明牛粪DOM对周丛生物吸附去除废水中Cu（Ⅱ）的影响，研究了牛粪DOM存在条件下周丛生物对Cu（Ⅱ）的吸附容量、等温吸附、吸附动力学特性，并结合解吸特性和红外基团分析结果，分析了DOM影响周丛生物吸附Cu（Ⅱ）特性的机理。研究结果表明：牛粪DOM含有大量的羟基、羧基、磷酸基团，对周丛生物吸附Cu（Ⅱ）有竞争抑制效应；等温吸附试验结果表明，纯周丛生物对Cu（Ⅱ）的吸附用Langmuir模型和Freundlich模型拟合的相关性系数均较高，而加入DOM后，Langmuir模型拟合的相关性系数要高于Freundlich模型；吸附动力学的研究结果表明纯周丛生物对Cu（Ⅱ）的吸附符合准二级动力学模型，DOM的加入不改变其吸附动力学特性；解吸试验结果表明纯周丛生物对Cu（Ⅱ）吸附主要通过离子交换和络合吸附的方式进行，而加入DOM后离子交换吸附比率降低，表面络合吸附比率增加。 |
| 英文摘要: |
| Cu(Ⅱ)ions and dissolved organic matter(DOM)originating from livestock manure co-exist in livestock wastewater. To elucidate the effects of DOM originating from cow manure on the adsorption characteristics of Cu(Ⅱ)by periphyton, the adsorption capacity, adsorption kinetics, and adsorption isotherm of Cu(Ⅱ)by periphyton were investigated in this study. The possible mechanisms were proposed based on the data of adsorption, desorption, and Fourier infrared spectra. The results showed that cow DOM enriched hydroxyl, carboxyl, and phosphoryl, which could decrease the adsorption capacity of Cu(Ⅱ)by periphyton through competitive adsorption. The adsorption isotherm of Cu (Ⅱ)by periphyton could be well fitted either by the Freundlich model or Langmuir model; however, the correlation coefficient(R2)for the Langmuir model was higher than that of Freundlich mode in the periphyton + DOM treatment. The adsorption kinetics of Cu(Ⅱ)by periphyton could be well fitted by the Pseudo-Second-order model, and it was not influenced by the addition of DOM. The results of desorption showed that ion exchange and surface complexation were the main binding forces for the adsorption of Cu(Ⅱ)by periphyton. DOM addition decreased the proportion of ion exchange but increased the proportion of surface complexation. |
| HTML
查看全文
查看/发表评论 下载PDF阅读器 |
