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| Effects of typical microplastics on migration of ciprofloxacin in porous media |
| Received:July 28, 2020 |
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| KeyWord:microplastics;antibiotics;ciprofloxacin;porous media;adsorption;migration |
| Author Name | Affiliation | E-mail | | CHEN Yan-na | Hydraulic Engineering Laboratory Institute of Groundwater and Earth Sciences, Jinan University, Guangzhou 510632, China | | | WU Ming | Hydraulic Engineering Laboratory Institute of Groundwater and Earth Sciences, Jinan University, Guangzhou 510632, China | wumingnj@foxmail.com | | CHENG Zhou | Guangdong Provincial Academy of Environmental Science, Guangzhou 510045, China | | | HU Bill X. | Hydraulic Engineering Laboratory Institute of Groundwater and Earth Sciences, Jinan University, Guangzhou 510632, China | |
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| Abstract: |
| Polypropylene(PP)and ciprofloxacin(CIP)were selected as typical microplastics and antibiotics, respectively to investigate the effect of microplastics on the migration of antibiotics in porous media. Based on CIP adsorption and migration experiments conducted in a sand column, the effects of PP on the mobility of CIP in saturated porous media were explored. Results showed that the adsorption capacity of CIP on PP was stronger than the adsorption capacity of CIP on quartz sand. The maximum Langmuir adsorption capacity of CIP on PP was 1.03 mg·g-1. In the sand column experiments, the CIP concentration of outflow decreased with an increase in PP content, and the peak value of CIP concentration appeared earlier with an increase in flow velocity. In addition, when the CIP concentration of inflow increased, the total amount of CIP flowing out of the sand column also increased. Adding electrolytes(such as NaCl, CaCl2, and BaCl2)into the CIP solution increased the ionic strength and enhanced the mobility of CIP in the sand column. In conclusion, this study suggests that PP can significantly affect the migration behavior of CIP in porous media. |
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