Optimization of the sorption of selected polycyclic aromatic hydrocarbons by regenerable graphene wool

被引:21
作者
Adeola, Adedapo O. [1 ]
Forbes, Patricia B. C. [1 ]
机构
[1] Univ Pretoria, Dept Chem, Fac Nat & Agr Sci, Lynnwood Rd, ZA-0002 Pretoria, South Africa
关键词
adsorption; graphene wool; phenanthrene; pyrene; water treatment; SOIL ORGANIC-MATTER; AQUEOUS-SOLUTION; REMOVAL; ADSORPTION; CARBON; WATER; PAHS; COAL; POLLUTANTS; PROTECTION;
D O I
10.2166/wst.2020.011
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
A novel graphene wool (GW) material was used as adsorbent for the removal of phenanthrene (PHEN) and pyrene (PYR) from aqueous solution. Adsorption kinetics, adsorption isotherms, thermodynamics of adsorption and effect of pH, ionic strength, and temperature on the adsorption of PHEN and PYR onto GW were comprehensively investigated. Isothermal and kinetic experimental data were fitted to Langmuir, Freundlich, Temkin, Sips and Dubinin-Radushkevich models, as well as pseudo-first-order and pseudo-second-order kinetic models. The adsorption kinetic data best fit the pseudo-second-order kinetic model for PHEN and PYR sorption with R-2 value >0.999, whilst the Sips model best fit isotherm data. Kinetic data revealed that 24 hr of contact between adsorbent and polycyclic aromatic hydrocarbons (PAHs) was sufficient for maximum adsorption, where the Langmuir maximum adsorption capacity of GW for PHEN and PYR was 5 and 20 mg g(-1) and the optimum removal efficiency was 99.9% and 99.1%, respectively. Thermodynamic experiments revealed that adsorption processes were endothermic and spontaneous. Desorption experiments indicated that irreversible sorption occurred with a hysteresis index greater that zero for both PAHs. The high adsorption capacity and potential reusability of GW makes it a very attractive material for removal of hydrophobic organic micro-pollutants from water.
引用
收藏
页码:1931 / 1943
页数:13
相关论文
共 41 条
[31]   Competitive sorption of pyrene on wood chars [J].
Wang, Xilong ;
Sato, T. ;
Xing, Baoshan .
ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2006, 40 (10) :3267-3272
[32]   Decontamination of Bisphenol A from Aqueous Solution by Graphene Adsorption [J].
Xu, Jing ;
Wang, Li ;
Zhu, Yongfa .
LANGMUIR, 2012, 28 (22) :8418-8425
[33]   Removal of selected polycyclic aromatic hydrocarbons from aqueous solution onto various adsorbent materials [J].
Yakout, S. M. ;
Daifullah, A. A. M. .
DESALINATION AND WATER TREATMENT, 2013, 51 (34-36) :6711-6718
[34]   Graphene-coated materials using silica particles as a framework for highly efficient removal of aromatic pollutants in water [J].
Yang, Kaijie ;
Chen, Baoliang ;
Zhu, Lizhong .
SCIENTIFIC REPORTS, 2015, 5
[35]   Desorption of polycyclic aromatic hydrocarbons from carbon nanomaterials in water [J].
Yang, Kun ;
Xing, Baoshan .
ENVIRONMENTAL POLLUTION, 2007, 145 (02) :529-537
[36]   Adsorption of naphthalene and its derivatives on magnetic graphene composites and the mechanism investigation [J].
Yang, Xin ;
Li, Jiaxing ;
Wen, Tao ;
Ren, Xuemei ;
Huang, Yongshun ;
Wang, Xiangke .
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 2013, 422 :118-125
[37]   Enhanced adsorptive removal of selected pharmaceutical antibiotics from aqueous solution by activated graphene [J].
Yu, Fei ;
Ma, Jie ;
Bi, Dongsu .
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH, 2015, 22 (06) :4715-4724
[38]   Adsorption of polycyclic aromatic hydrocarbons from water using petroleum coke-derived porous carbon [J].
Yuan, Mingjiang ;
Tong, Shitang ;
Zhao, Suoqi ;
Jia, Charles Q. .
JOURNAL OF HAZARDOUS MATERIALS, 2010, 181 (1-3) :1115-1120
[39]   Removal of PAHs from water using an immature coal (leonardite) [J].
Zeledon-Toruno, Zoraida C. ;
Lao-Luque, Conxita ;
de las Heras, F. Xavier C. ;
Sole-Sardans, Montserrat .
CHEMOSPHERE, 2007, 67 (03) :505-512
[40]   Adsorption of Clofibric Acid from Aqueous Solution by Graphene Oxide and the Effect of Environmental Factors [J].
Zhang, Ya-Lei ;
Liu, Yan-Jing ;
Dai, Chao-Meng ;
Zhou, Xue-Fei ;
Liu, Shu-Guang .
WATER AIR AND SOIL POLLUTION, 2014, 225 (08)