Yang Hailin, Lu Xiaofei, He Mengchang
a State Key Laboratory of Water Environment Simulation, School of Environment , Beijing Normal University , Beijing , People's Republic of China.
b Chemistry and Biochemistry Department , University of Massachusetts Dartmouth , Dartmouth , MA , USA.
Environ Technol. 2018 Jun;39(12):1515-1521. doi: 10.1080/09593330.2017.1332107. Epub 2017 May 27.
Antimony (Sb) is of increasing environmental concern worldwide. The sorption behavior of Sb was investigated. Both Sb(III) and Sb(V) were likely to be sorbed onto nanocrystalline titanium dioxide (TiO). Sorption studies showed that the Sb(V) sorption capacity and rate for TiO were greater than those of Sb(III). The highest Sb(III) and Sb(V) sorption on TiO, on the basis of the Langmuir equation, were 333 and 588 mmol kg, respectively. The study suggested that TiO is an effective adsorbent for Sb removal. In addition, Sb mobilization in the presence of humic acid (HA) was found to be highly pH-dependent. For pH values of 9-11, the addition of HA enhanced Sb mobilization significantly. The results highlight the importance of organic matter in the mobilization of Sb in alkaline-contaminated environments.
锑（Sb）在全球范围内日益引起环境关注。对锑的吸附行为进行了研究。三价锑（Sb(III)）和五价锑（Sb(V)）都有可能吸附到纳米晶二氧化钛（TiO）上。吸附研究表明，TiO对Sb(V)的吸附容量和速率大于对Sb(III)的吸附容量和速率。根据朗缪尔方程，TiO对Sb(III)和Sb(V)的最高吸附量分别为333和588 mmol·kg。该研究表明，TiO是一种去除锑的有效吸附剂。此外，发现腐殖酸（HA）存在下锑的迁移高度依赖于pH值。对于pH值为9至11的情况，添加HA会显著增强锑的迁移。结果突出了有机物在碱性污染环境中锑迁移中的重要性。
