Factors affecting the adsorptive removal of bisphenol A in landfill leachate by high silica Y-type zeolite

Abstract

Although bisphenol A (BPA), a representative endocrine-disrupting compound, has been detected frequently in landfill leachate, effective technologies for BPA removal from landfill leachates are limited. We used high silica Y-type zeolite (HSZ-385) for the selective adsorption of BPA from landfill leachate, and factors affecting this adsorption are discussed. Higher removal efficiencies at pH 5.0-9.0 imply that neutral BPA is adsorbed more easily onto HSZ-385 than monomeric or divalent BPA anions. An increase in ionic strength and sodium acetate concentration did not affect BPA adsorption significantly, while the removal efficiency decreased slightly when more than 50 mgC/L of humic acid was added. HSZ-385 was applied to synthetic leachates that simulate the composition of landfill leachate at various degradation stages. In young acidic leachates that contain sodium acetate, the use of HSZ-385 for the adsorptive removal of BPA appears to be more effective than in old alkaline leachates, which contain large amounts of humic acid. In addition, 82 % BPA removal was achieved from young raw leachates using HSZ-385, which demonstrates that selective BPA removal from actual landfill leachate has been achieved.

Removal of Crotamiton from Reverse Osmosis Concentrate by a TiO2/Zeolite Composite Sheet

“…It has been reported that inorganic ions and organic materials affect the adsorption of pharmaceuticals [32]. Nevertheless, the adsorption of sulfonamide antibiotics from livestock urine and bisphenol A from landfill leachate by HSZ-385 was not affected by coexisting ions [14,20]. Meanwhile, even if the organic carbon content of porcine urine was two orders of magnitude higher than those of the sulfonamides, the sulfonamides were also effectively removed [20].…”

“…Meanwhile, even if the organic carbon content of porcine urine was two orders of magnitude higher than those of the sulfonamides, the sulfonamides were also effectively removed [20]. For bisphenol A, the removal efficiency decreased slightly when more than 50 mg/L humic acid was added [14]. Umar et al, reported that humic-like and fulvic acid-like matter in the RO concentrate were the major contributors to the color of the concentrate [33].…”

“…Wastewater treatment frequently involves adsorption processes, and various types of adsorbents have been developed to remove different pollutants [14][15][16][17][18][19]. The high-silica Y-type zeolite HSZ-385, which is a hydrophobic zeolite, has been used to remove sulfonamide antibiotics from wastewater and selectively removes sulfonamides even in the presence of high concentrations of coexisting materials [20].…”

Removing crotamiton from reverse osmosis concentrate by using coagulation and a rotating advanced oxidation contactor

“…It is reported that the micropores of zeolites can prevent the entrance of most background organic matter components present in water, thus preventing an unfavorable adsorption effect (Jiang, Shang, Heijman, & Rietveld, 2018). When HSZ‐385 was used to remove bisphenol A from landfill leachate, even with the presence of more than 50 mg/L of humic acid, the decrease in removal efficiency was very low (Chen, Fujiwara, Fukahori, & Ishigaki, 2015). Similar adsorption of crotamiton by the RAOC in the RO concentrate base tests compared with the ultrapure water base tests demonstrated that the coexisting matter in the RO concentrate (Exhibit 1) had no effect under the experimental condition.…”

Research Progress of Methods for Degradation of Bisphenol A

“…• C[87]. Chen et al observed that high silica Y-type zeolite can selectively adsorb BPA in landfill leachate with significant concentrations of humic acids, which is possibly due to the hydrophobic interaction between them[88].Wang et al modified zeolite with cetyltrimethylammonium bromide to adsorb BPA, resulting in an adsorption capacity ranging from 17.78 to 23.12 mg/g at a pH of10 [89]. Dong et al utilized hexadecyltrimethylammonium to modify zeolite synthesized from fly ash (SMZFA) and discovered that the adsorption of BPA by SMZFA was pH-dependent, especially in alkaline conditions[90].…”