采用纯矿物浮选实验、动电位测试、红外光谱检测以及密度泛函理论计算研究了1-羟基-2-甲基-2-烯辛基膦酸(HEPA)对锡石的浮选行为及吸附机理。浮选实验结果表明，相比苯乙烯膦酸(SPA)，HEPA具有出更强的捕收性能。当HEPA浓度为50 mg/L时，在pH 2?9范围内锡石回收率都保持在90%以上。动电位测试和红外光谱检测结果表明，HEPA在锡石表面的吸附主要是通过HEPA单阴离子与锡石表面的锡原子形成化学吸附。密度泛函计算结果表明，HEPA单阴离子比SPA单阴离子具有更高的HOMO能量和对锡石更强的吸附力，这为浮选实验和动电位测试中HEPA的更强捕收力提供了有力证明。
The flotation behavior and adsorption mechanism of novel (1-hydroxy-2-methyl-2-octenyl) phosphonic acid (HEPA) to cassiterite were investigated by micro-flotation tests, zeta potential measurements, FTIR determination and density functional theory (DFT) calculation. The flotation results demonstrated that HEPA exhibited superior collecting performance compared with styrene phosphonic acid (SPA). The cassiterite recovery maintained above 90% over a wide pH range of 2?9 with 50 mg/L HEPA. The results of zeta potential measurement and FTIR detection indicated that the adsorption of HEPA onto cassiterite was mainly attributed to the chemisorption between HEPA monoanions and Sn species on mineral surfaces. The DFT calculation results demonstrated that HEPA monoanions owned higher HOMO energy and exhibited a better affinity to cassiterite than SPA, which provided very clear evidence for the stronger collecting power of HEPA presented in floatation test and zeta potential measurement.
参考文献
| [1] | Sreenivas T.;Manohar C..Investigations on the Collector Reagent Development for the Recovery of Cassiterite from the Gravity Tails of a Low Grade Indian Tin Ore[J].Mineral Processing and Extractive Metallurgy Review,19985/6(5/6):461-479. |
| [2] | Wenqing Qin;Yangbao Xu;Hui Liu.Flotation and Surface Behavior of Cassiterite with Salicylhydroxamic Acid[J].Industrial & Engineering Chemistry Research,201118(18):10778-10783. |
| [3] | Sreenivas T.;Padmanabhan NPH..Surface chemistry and flotation of cassiterite with alkyl hydroxamates[J].Colloids and Surfaces, A. Physicochemical and Engineering Aspects,20021/2(1/2):47-59. |
| [4] | Angadi, S. I.;Sreenivas, T.;Jeon, Ho-Seok;Baek, Sang-Ho;Mishra, B. K..A review of cassiterite beneficiation fundamentals and plant practices[J].Minerals Engineering,2015:178-200. |
| [5] | Li, Fangxu;Zhong, Hong;Zhao, Gang;Wang, Shuai;Liu, Guangyi.Flotation performances and adsorption mechanism of alpha-hydroxyoctyl phosphinic acid to cassiterite[J].Applied Surface Science: A Journal Devoted to the Properties of Interfaces in Relation to the Synthesis and Behaviour of Materials,2015Oct.30(Oct.30):856-864. |
| [6] | Gang Zhao;Hong Zhong;Xianyang Qiu<D.Cuangzhou Research Institute of Non-ferrous Metals, Guangzhou 510651, China.The DFT study of cyclohexyl hydroxamic acid as a collector in scheelite flotation[J].Minerals Engineering,2013:54-60. |
| [7] | 焦芬;覃文庆;刘瑞增;王兴杰.巯基苯骈噻唑在黄铜矿和闪锌矿表面的吸附机理：第一性原理分析和光谱研究[J].中国有色金属学报（英文版）,2015(7):2388-2397. |
| [8] | Ya-Ying Zhao;Fu-Ming Tao;Eddy Y. Zeng.Theoretical study of the quantitative structure-activity relationships for the toxicity of dibenzo-p-dioxins[J].Chemosphere: Environmental toxicology and risk assessment,20081(1):86-91. |
| [9] | 赵翠华;陈建华;李玉琼;陈晔;李伟洲.氧分子与黄铁矿、白铁矿和磁黄铁矿表面作用的第一性原理计算[J].中国有色金属学报（英文版）,2016(2):519-526. |
| [10] | Oviedo J.;Gillan MJ..Energetics and structure of stoichiometric SnO2 surfaces studied by first-principles calculations[J].Surface Science: A Journal Devoted to the Physics and Chemistry of Interfaces,20002(2):93-101. |
| [11] | Albouy D.;Munoz A.;Etemad-Moghadam G.;Brun A..New (alpha-hydroxyalkyl)phosphorus amphiphiles: Synthesis and dissociation constants [Review][J].The Journal of Organic Chemistry,199821(21):7223-7230. |
| [12] | Wang, K.;Liu, Q..Adsorption of phosphorylated chitosan on mineral surfaces[J].Colloids and Surfaces, A. Physicochemical and Engineering Aspects,2013:656-663. |
| [13] | G. L. Chen;D. Tao;H. Ren.An investigation of niobite flotation with octyl diphosphonic acid as collector[J].International Journal of Mineral Processing,20051/2(1/2):111-122. |
| [14] | 刘广义;钟宏;戴塔根;夏柳荫.中碱度条件下乙氧羰基硫脲浮选分离铜硫[J].中国有色金属学报,2009(2):389-396. |
| [15] | Liu, G.;Xiao, J.;Zhou, D.;Zhong, H.;Choi, P.;Xu, Z..A DFT study on the structure-reactivity relationship of thiophosphorus acids as flotation collectors with sulfide minerals: Implication of surface adsorption[J].Colloids and Surfaces, A. Physicochemical and Engineering Aspects,2013:243-252. |
| [16] | Liu, G.;Zeng, H.;Lu, Q.;Zhong, H.;Choi, P.;Xu, Z..Adsorption of mercaptobenzoheterocyclic compounds on sulfide mineral surfaces: A density functional theory study of structure-reactivity relations[J].Colloids and Surfaces, A. Physicochemical and Engineering Aspects,2012:1-9. |
| [17] | Chien-Hsiang Chang;Elias I. Franses.Adsorption dynamics of surfactants at the air/water interface: a critical review of mathematical models, data, and mechanisms[J].Colloids and Surfaces, A. Physicochemical and Engineering Aspects,19951/3(1/3):1-45. |
| [18] | Prosser AJ.;Franses EI..Adsorption and surface tension of ionic surfactants at the air-water interface: review and evaluation of equilibrium models [Review][J].Colloids and Surfaces, A. Physicochemical and Engineering Aspects,20011/3(1/3):1-40. |
| [19] | 张炜.使用半工业化机械浮选机评估矿浆黏度变化对浮选气泡大小的影响[J].中国有色金属学报（英文版）,2014(09):2964-2968. |
| [20] | 任浏祎;张一敏;覃文庆;包申旭;王军.锡石颗粒与氢气泡间的碰撞粘附行为[J].中国有色金属学报（英文版）,2014(2):520-527. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%