Adsorption of Sb(Ⅴ) in Water by Natural Pyrite: Performance and Mechanism

被引：4
|
作者：
Shi S. [1 ]
Wu Q.-Y. [2 ]
Li X.-Z. [2 ]
Huang M.-H. [1 ]
机构：
[1] State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, College of Environmental Science and Engineering, Donghua University, Shanghai
[2] Key Laboratory of Microorganism Application and Risk Control of Shenzhen, Guangdong Provincial Engineering Research Center for Urban Water Recycling and Environmental Safety, Tsinghua University, Shenzhen
来源：
Huanjing Kexue/Environmental Science | 2020年 / 41卷 / 09期
关键词：
Coordination exchange; Kinetics; Oxygen anion; Pyrite; Sb(Ⅴ);
D O I：
10.13227/j.hjkx.202001115
中图分类号：
学科分类号：
摘要：
The adsorption performance of three iron ores (pyrite, hematite, and magnetite) on Sb(Ⅴ) was compared and pyrite was shown to exhibit the highest adsorption performance. The effects of particle size, concentration, and pH on the adsorption performance were investigated with pyrite as the absorbent. The rejection of Sb(Ⅴ) was the highest (>80%) when pyrite (particle size <0.074 mm) was used as the absorbent with a concentration of 1 g•L-1 and pH=7. The ion competition experiment indicated that PO43- can inhibit the adsorption of Sb(Ⅴ), while SO42- and CO32- have no significant effects on the adsorption of Sb(Ⅴ) because PO43- can compete with Sb(Ⅴ) for active adsorption sites on the surface of pyrite. The results also showed that the quasi-second-order kinetic model and Langmuir model can better simulate the adsorption process, which shows a single-layer adsorption behavior and chemisorption plays a main role in the rejection of Sb(Ⅴ). FTIR analysis suggested that the removal of Sb(Ⅴ) by pyrite was a coordinated ion exchange reaction. EDS and XPS results further confirmed that Sb(Ⅴ) was adsorbed on the surface of pyrite and was not reduced to Sb(Ⅲ), which is more toxic. © 2020, Science Press. All right reserved.
引用
收藏
页码：4124 / 4132
页数：8
相关论文
共 32 条
  • [1] Guo X J, Wu Z J, He M C, Et al., Adsorption of antimony onto iron oxyhydroxides: adsorption behavior and surface structure, Journal of Hazardous Materials, 276, pp. 339-345, (2014)
  • [2] Chen J J, Zhang G P, Li H X, Et al., Removal of antimony in wastewater by electrochemical hydride generation and the recovery of antimony, Environmental Science, 36, 4, pp. 1338-1344, (2015)
  • [3] Jiang T, Bao Y, Li W, Et al., Removal of antimony from water by nano zero-valent iron/activated carbon composites, Environmental Science, 38, 11, pp. 4632-4640, (2017)
  • [4] Yang K L, Zhou J S, Lou Z M, Et al., Removal of Sb(Ⅴ) from aqueous solutions using Fe-Mn binary oxides: the influence of iron oxides forms and the role of manganese oxides, Chemical Engineering Journal, 354, pp. 577-588, (2018)
  • [5] Wu Z J, He M C, Guo X J, Et al., Removal of antimony (Ⅲ) and antimony (V) from drinking water by ferric chloride coagulation: competing ion effect and the mechanism analysis, Separation and Purification Technology, 76, 2, pp. 184-190, (2010)
  • [6] Miao Y Y, Han F C, Pan B C, Et al., Antimony(V) removal from water by hydrated ferric oxides supported by calcite sand and polymeric anion exchanger, Journal of Environmental Sciences, 26, 2, pp. 307-314, (2014)
  • [7] Du X, Qu F S, Liang H, Et al., Removal of antimony (Ⅲ) from polluted surface water using a hybrid coagulation-flocculation-ultrafiltration (CF-UF) process, Chemical Engineering Journal, 254, pp. 293-301, (2014)
  • [8] Simeonidis K, Kalaitzidou K, Kaprara E, Et al., Uptake of Sb(Ⅴ) by nano Fe<sub>3</sub>O<sub>4</sub>-decorated iron oxy-hydroxides, Water, 11, 1, (2019)
  • [9] Ye Y X, Shan C, Zhang X L, Et al., Water decontamination from Cr(Ⅲ)-organic complexes based on pyrite/H<sub>2</sub>O<sub>2</sub>: performance, mechanism, and validation, Environmental Science and Technology, 52, 18, pp. 10657-10664, (2018)
  • [10] Liu Z, Zhang X M, Xiao C L, Et al., As(Ⅴ) removal from water with natural pyrrhotite, Acta Scientiae Circumstantiae, 36, 10, pp. 3701-3708, (2016)
1234