Hu Shujie, Xu Decheng, Kong Xianglan, Gong Jian, Yang Yu, Ran Yong, Mao Jingdong
State Key Laboratory of Organic Geochemistry, Guangdong- Hong Kong- Macao Joint Laboratory for Environmental Pollution and Control, and Guangdong Provincial Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China; University of Chinese Academy of Science, Beijing 100049, China.
Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China.
Sci Total Environ. 2021 Mar 20;761:144191. doi: 10.1016/j.scitotenv.2020.144191. Epub 2020 Dec 13.
Activated, oxidized, and solvent-extracted black carbon samples (BCs) were produced from a shale kerogen at temperatures ranging from 250 to 500 °C by chemical activation regents (KOH, ZnCl), oxidative regents (HO, NaClO), and organic solvents, respectively. Extracted organic matter (EOM) and polycyclic aromatic hydrocarbons (PAHs) were quantified in BCs, and they increased and then decreased with increasing temperature. Sorption and desorption isotherms of nonylphenol (NP) on BCs were compared with those previously reported for phenanthrene (Phen). The desorption hysteresis coefficients of NP were greater than those of Phen, while the adsorption capacities of NP were different from those of Phen. The micropore volume and micropore size were critical factors for the micropore filling mechanism of NP in BCs. The ZnCl activation and oxidation treatments were observed to effectively enhance the adsorption of NP and to remove native PAHs from the investigated BCs. But the KOH activation and oxidation treatments were not as efficient as expected. Moreover, the NP desorption hysteresis suggested that a hydrogen bonding and micropore deformation mechanism occurred on the extracted activated BCs. This finding improves our understanding of the sorption and desorption mechanisms of NP from the perspective of the modified BCs and their applications.
通过化学活化剂（KOH、ZnCl）、氧化剂（HO、NaClO）和有机溶剂，分别在250至500°C的温度范围内，从页岩干酪根制备了活化、氧化和溶剂萃取的黑碳样品（BCs）。对BCs中的萃取有机物（EOM）和多环芳烃（PAHs）进行了定量分析，结果表明它们随温度升高先增加后降低。将壬基酚（NP）在BCs上的吸附和解吸等温线与先前报道的菲（Phen）的等温线进行了比较。NP的解吸滞后系数大于Phen，而NP的吸附容量与Phen不同。微孔体积和微孔尺寸是BCs中NP微孔填充机制的关键因素。观察到ZnCl活化和氧化处理有效地增强了NP的吸附，并从所研究的BCs中去除了天然PAHs。但KOH活化和氧化处理不如预期有效。此外，NP解吸滞后表明在萃取的活化BCs上发生了氢键和微孔变形机制。这一发现从改性BCs及其应用的角度提高了我们对NP吸附和解吸机制的理解。
