Mechanisms and application of the IAST-EBC model for predicting 2-MIB adsorption by PAC in authentic raw waters: Correlation between NOM competitiveness and water quality parameters

Junying Ren; Sihui Yang; Lei Li; Shuili Yu; Naiyun Gao

doi:10.1016/j.jhazmat.2021.127904

Mechanisms and application of the IAST-EBC model for predicting 2-MIB adsorption by PAC in authentic raw waters: Correlation between NOM competitiveness and water quality parameters

J Hazard Mater. 2022 Apr 5:427:127904. doi: 10.1016/j.jhazmat.2021.127904. Epub 2021 Nov 25.

Authors

Junying Ren¹, Sihui Yang¹, Lei Li², Shuili Yu³, Naiyun Gao¹

Affiliations

¹ State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China.
² State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China. Electronic address: lilei@tongji.edu.cn.
³ State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China.

PMID: 34895807
DOI: 10.1016/j.jhazmat.2021.127904

Abstract

Natural organic matter (NOM) exerts negative impacts on 2-methylisoborneol (2-MIB) removal by powdered activated carbon (PAC), thus adding to the difficulty in accurate PAC dose prediction. Our study investigated the application of the ideal adsorbed solution theory-equivalent background compound (IAST-EBC) model and its simplified version for PAC dose prediction. Four raw water samples were employed, and the corresponding C_0,EBC values, indicating NOM competitiveness, were calculated. The results showed that the IAST-EBC model presented ideal predictive performance in 2-MIB adsorption under both equilibrium and nonequilibrium conditions and the C_0,EBC values of the Huangpu River (8800 ng/L) and Qiantang River (10300 ng/L) were high, representing the higher NOM competitiveness in these two rivers, which may be caused by municipal effluent and industrial wastewater discharge. In contrast, Tai Lake water showed a lower C_0,EBC value (6400 ng/L), which was likely associated with algae and other microbial activities. The fluorescence index (FI, the ratio of E_x/E_m = 370/470 nm to E_x/E_m = 370/520 nm) can be applied to estimate C_0,EBC, thus facilitating prediction. Our study also showed that the IAST-EBC model can be further simplified under lower initial 2-MIB concentrations or longer contact times, which is particularly useful for practical applications.

Keywords: 2-methylisoborneol; Adsorption competition; IAST-EBC model; NOM; Powdered activated carbon.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Adsorption
Charcoal
Powders
Water Pollutants, Chemical* / analysis
Water Purification*
Water Quality

Substances

Powders
Water Pollutants, Chemical
Charcoal