XING Huijuan，FAN Yuping，MA Xiaomin，et al. Preparation of Pb-doped tailings-based nano-TiO2 and study on photocatalytic degradation of PAM wastewater[J]. Coal Science and Technology，2023，51（6）：257−264
. DOI: 10.13199/j.cnki.cst.2022-0136| Citation: |
XING Huijuan，FAN Yuping，MA Xiaomin，et al. Preparation of Pb-doped tailings-based nano-TiO2 and study on photocatalytic degradation of PAM wastewater[J]. Coal Science and Technology，2023，51（6）：257−264 . DOI: 10.13199/j.cnki.cst.2022-0136
|
As an efficient flocculant, polyacrylamide (PAM) is widely used in water treatment process. The acrylamide monomer (AM) produced by depolymerization of residual PAM has been listed as a class IIA carcinogen, and its treatment is imminent. Flotation tailing (TC) was used as raw material to prepare a modified tailing matrix by alkali excitation. Nano-TiO2 was loaded onto the modified tailing matrix by hydrothermal method to prepare tailing-based nano-TiO2 composite (TiO2/TC) and Pb-doped tailing-based nano-TiO2 composite (Pb-TiO2/TC). The photocatalytic degradation properties of TC, modified coal matrix, TiO2/TC and Pb-TiO2/TC were analyzed with PAM as the target pollutant. The samples were characterized by XRD, SEM, UV-vis and BET, and the degradation products were analyzed and studied by high performance liquid chromatography-mass spectrometry. The degradation mechanism of PAM was explored. The results show that TC is irregular and the surface is rough; the surface of TiO2/TC is loose, the pore structure is obvious, and the fine tubular TiO2 is uniformly coated on the surface of modified tailings. The structure of Pb-TiO2/TC is more fluffy, and the modified coal matrix is loaded with more tubular TiO2. The band gap of TiO2/TC was 3.16 eV, and Pb2+ doping reduced the band gap of Pb-TiO2/TC to 3.08 eV. The specific surface area of TiO2 is 286.66 m2/g, the specific surface area of TiO2/TC and Pb-TiO2/TC are 360.33 m2/g and 358.54 m2/g. The higher specific surface area provides more active sites for the reaction, and the adsorption-catalytic synergistic effect significantly improves the photocatalytic efficiency. The degradation rates of PAM by TC and modified tailing matrix were 3.39% and 4.68%. The degradation rates of polyacrylamide by TiO2/TC and Pb-TiO2/TC loaded with TiO2 increased to 38.92% and 63.87%. After five cycles, the photocatalytic properties of TiO2/TC and Pb-TiO2/TC remained basically unchanged. In the degradation process of PAM, the macromolecular PAM breaks into small molecular weight PAM molecules, and further decomposes into NO3−, acrylic acid, acetamide and acetic acid.
| [1] |
郭中权,毛维东,肖 艳,等. 聚丙烯酰胺残留物在矿井水处理中的迁移规律[J]. 煤炭学报,2021,46(1):245−250. doi: 10.13225/j.cnki.jccs.2019.1678
GUO Zhongquan,MAO Weidong,XIAO Yan,et al. Migration of polyacrylamide residues in mine water treatment[J]. Journal of Coal,2021,46(1):245−250. doi: 10.13225/j.cnki.jccs.2019.1678
|
| [2] |
HU H,LIU JF,LI C Y,et al. Anaerobic biodegradation of partially hydrolyzed polyacrylamide in long-term methanogenic enrichment cultures from production water of oil reservoirs[J]. Biodegradation,2018,29(3):233−243. doi: 10.1007/s10532-018-9825-1
|
| [3] |
WEI L,WANG X,CHEN S,et al. Study of the Influencing Factors of Sedimentation Separation of Polymer-Contained Sewage in Gravity Sedimentation Tank[J]. Nature Environment and Pollution Technology,2018,17(2):367−374.
|
| [4] |
卞立红,任国领,何 雯,等. 基于两株菌的复合菌处理油田采出水效果评价[J]. 大庆石油地质与开发,2019,38(4):105−109. doi: 10.19597/j.issn.1000-3754.201904004
BIAN Lihong,REN Guoling,HE Wen,et al. Evaluation of oilfield produced water treatment effect based on two strains of bacteria[J]. Daqing petroleum geology and development,2019,38(4):105−109. doi: 10.19597/j.issn.1000-3754.201904004
|
| [5] |
JAMAL A S,TANUJJAL B,MICHEL C,et al. Visible light photocatalytic degradation of HPAM polymer in oil produced water using supported zinc oxide nanorods[J]. Chemical Engineering Journal,2018,351:56−64. doi: 10.1016/j.cej.2018.06.071
|
| [6] |
张东晨,王方略,王 涛,等. 混合菌协同降解煤泥水中聚丙烯酰胺的试验研究[J]. 洁净煤技术,2021,27(1):209−216. doi: 10.13226/j.issn.1006-6772.A20102701
ZHANG Dongchen,WANG Fanglue,WANG Tao,et al. Experimental study on the synergistic degradation of polyacrylamide in coal slime water by mixed bacteria[J]. Clean coal technology,2021,27(1):209−216. doi: 10.13226/j.issn.1006-6772.A20102701
|
| [7] |
巩 云,王龙龙,徐亚琪,等. 二氧化钛光催化材料的改性研究进展[J]. 材料导报,2020,34(Z2):37−40.
GONG Yun,WANG Longlong,XU Yaqi,et al. Research progress in modification of titanium dioxide photocatalytic materials[J]. Materials Review,2020,34(Z2):37−40.
|
| [8] |
金秀颖. TiO2/伊利石复合材料的制备及其光催化性能研究[D]. 延边: 延边大学, 2021: 32−48.
JIN Xiuying. Preparation and photocatalytic properties of TiO2/illite composites[D]. Yanbian: Yan bian University, 2021: 32−48.
|
| [9] |
HUO P,YAN Y,LI S,et al. Floating photocatalysts of fly-ash cenospheres supported AgCl/TiO2 films with enhanced Rhodamine B photodecomposition activity[J]. Desalination,2010,256(1/3):196−200. doi: 10.1016/j.desal.2010.01.012
|
| [10] |
RAVICHANDRAN L,SELVAM K,SWAMINATHAN M. Highly efficient activated carbon loaded TiO2 for photo defluoridation of pentafluorobenzoic acid[J]. Journal of Molecular Catalysis A Chemical,2010,317(1-2):89−96. doi: 10.1016/j.molcata.2009.10.029
|
| [11] |
李 阳,张玉贵,张 浪,等. 基于压汞, 低温N2吸附和CO2吸附的构造煤孔隙结构表征[J]. 煤炭学报,2019,44(4):1188−1196.
LI Yang,ZHANG Yugui,ZHANG Lang,et al. Characterization of pore structure of tectonic coal based on mercury intrusion, low temperature N2 adsorption and CO2 adsorption[J]. Journal of Coal,2019,44(4):1188−1196.
|
| [12] |
肖颖冠,孙孝东,李霖昱,等. 碳−氮共改性中空二氧化钛光催化剂的同步合成及其高效的光催化行为和循环稳定性研究(英文)[J]. 催化学报,2019,40(5):765−775. doi: 10.1016/S1872-2067(19)63286-9
XIAO Yingguan,SUN Xiaodong,LI Linyu,et al. Synchronized synthesis of carbon-nitrogen co-modified hollow titanium dioxide photocatalyst and its efficient photocatalytic behavior and cycle stability[J]. Journal of Catalysis,2019,40(5):765−775. doi: 10.1016/S1872-2067(19)63286-9
|
| [13] |
ANITA S,PANKAJ R,POOJA S,et al. Review on fabrication of graphitic carbon nitride based efficient nanocomposites for photodegradation of aqueous phase organic pollutants[J]. Journal of Industrial and Engineering Chemistry,2018,67:28−51. doi: 10.1016/j.jiec.2018.07.007
|
| [14] |
LI D H,JIANG Z Y,LIN Y M,et al. Theoretical studies of photocatalytic behaviors of isoelectronic Sn/Pb-doped TiO2: DFT+ U[J]. Applied Surface Science,2021,555:149714. doi: 10.1016/j.apsusc.2021.149714
|
| [15] |
江 能,房 永,江 勇. 次氯酸钠氧化法测定聚丙烯酰胺浓度的研究[J]. 工业水处理,2005,25(8):46−49. doi: 10.3969/j.issn.1005-829X.2005.08.014
JIANG Neng,Fang Yong,JIANG Yong. Determination of polyacrylamide concentration by sodium hypochlorite oxidation method[J]. Industrial water treatment,2005,25(8):46−49. doi: 10.3969/j.issn.1005-829X.2005.08.014
|
| [16] |
匡敬忠,黄哲誉,马 强,等. 偏高岭石碱溶合成方钠石相变过程及吸附特性[J]. 材料导报,2018,32(22):3853−3861. doi: 10.11896/j.issn.1005-023X.2018.22.004
KUANG Jingzhong,HUANG Zhejing,MA Qiang,et al. Phase transformation process and adsorption characteristics of metakaolinite alkali soluble synthetic sodalite[J]. Materials Report,2018,32(22):3853−3861. doi: 10.11896/j.issn.1005-023X.2018.22.004
|
| [17] |
ZHANG J,LI S,LI H,et al. Preparation of Al–Si composite from high-alumina coal fly ash by mechanical–chemical synergistic activation[J]. Ceramics International,2017,43(8):6532−6541. doi: 10.1016/j.ceramint.2017.02.075
|
| [18] |
何梓豪,姚素玲,董宪姝,等. 焙烧联合碳酸钠改性尾煤基吸附剂的制备及其对Cu(Ⅱ)的吸附[J]. 矿业研究与开发,2021,41(8):149−153. doi: 10.13827/j.cnki.kyyk.2021.08.026
HE Zihao,YAO Suling,DONG Xianshu,et al. Preparation of roasting combined with sodium carbonate modified coal-based adsorbent and its adsorption of Cu (II)[J]. Mining research and development,2021,41(8):149−153. doi: 10.13827/j.cnki.kyyk.2021.08.026
|
| [19] |
杨 眉,刘良文,郑 珩,等. 堇青石表面化学气相沉积二氧化钛的负载机理及负载动力学(英文)[J]. 稀有金属材料与工程,2022,51(3):778−782.
YANG Mei,LIU Liangwen,ZHENG Heng,et al. Loading mechanism and kinetics of chemical vapor deposition of titanium dioxide on cordierite surface[J]. Rare metal materials and engineering,2022,51(3):778−782.
|
| [20] |
RONG Xinshan,QIU Fengxian,ZHANG Chen,et al. Preparation of Ag–AgBr/TiO2–graphene and its visible light photocatalytic activity enhancement for the degradation of polyacrylamide[J]. Journal of Alloys and Compounds,2015,639:153−161. doi: 10.1016/j.jallcom.2015.03.163
|
| [21] |
王景洋. 聚丙烯酰胺絮凝剂对悬浮光催化体系TiO2的絮凝回收再利用[D]. 兰州: 兰州交通大学, 2016: 42-50.
WANG Jingyang. Flocculation recovery and reuse of polyacrylamide flocculant for TiO2 suspension photocatalytic system[D]. Lanzhou: Lanzhou Jiaotong University, 2016: 42–50.
|
| [22] |
王江炎,刘保顺,中田一弥. 结晶度, {001}/{101}晶面比和Au负载对热处理TiO2制备的锐钛矿TiO2光催化活性的影响(英文)[J]. 催化学报,2019,40(3):403−412. doi: 10.1016/S1872-2067(18)63174-2
WANG Jiangyan,LIU Baoshun,NAKATA Kazuya. Effects of crystallinity, {001}/{101} ratio, and Au decoration on the photocatalytic activity of anatase TiO2 crystals[J]. Journal of Catalysis,2019,40(3):403−412. doi: 10.1016/S1872-2067(18)63174-2
|
| [23] |
代学伟, 吴 江, 齐雪梅, 等. Fe掺杂TiO2催化剂制备及其光催化脱汞机理[J]. 环境科学研究, 2014, 27(8): 827−834.
DAI Xuewei, WU Jiang, QI Xuemei, et al. Preparation of Fe-doped TiO2 catalyst and its photocatalytic mercury removal mechanism[J]. Research of Environment Science,2014, 27(8): 827−834.
|
| [1] | SONG Shuai, FAN Yuping, MA Xiaomin, DONG Xianshu, CHANG Ming. Study on structural characteristics and influence mechanism of coal slurry flocs by mechanical shearing[J]. COAL SCIENCE AND TECHNOLOGY, 2020, 48(6). |
| [2] | LI Zien. Selection and optimization of flocculant for black water treatment from coal water slurry gasification[J]. COAL SCIENCE AND TECHNOLOGY, 2017, (9). |
| [3] | Yan Jia Zhang Dongchen Xu Jingyao Ji Minmin Fan Xiaolu Chang Fei, . Study on adsorption kinetics of slime to polyacrylamide in polymer-containing waste water[J]. COAL SCIENCE AND TECHNOLOGY, 2016, (2). |
| [4] | Poly Ferric Silicate Flocculant Prepared with Fly Ash and Treatment of Slurry Water[J]. COAL SCIENCE AND TECHNOLOGY, 2013, (7). |
| [5] | Experiment Study on Selective Flocculation Separation of Fine Particle Coal[J]. COAL SCIENCE AND TECHNOLOGY, 2012, (3). |
| 1. |
吴丹，刘伯赈，徐洲. 改性纳米TiO_2的制备及光催化降解废水性能的研究. 功能材料. 2025(01): 1164-1170 .
| |
| 2. |
杨娟，单启月，戴俊，张鸽，丰之翔. Z型异质结Ag_2S/AgVO_3可见光催化转化低浓度瓦斯制甲醇性能研究. 煤炭科学技术. 2024(04): 275-287 .
本站查看
|
Supported by: Beijing Renhe Information Technology Co., Ltd. 
DownLoad: