E molecules can be adsorbed around the identical internet site. The maximum adsorption capacity was accomplished when each of the adsorption web sites ofAppl. Sci. 2021, 11,11 ofthe adsorbent were saturated using the adsorbate. The Freundlich model was applied to CYM5442 GPCR/G Protein describe adsorption on homogeneous and heterogeneous surfaces. The fitting curves of your Langmuir and Freundlich models are shown in Figure 9b,c, respectively. Comparatively, the Langmuir isotherm model can far better describe the adsorption isotherms. The R2 value (0.9972 and 0.9931) on the Langmuir model was quite higher, suggesting that the adsorbed phosphate forms a monolayer onto the surface of BSGMAEDAQ and Bisindolylmaleimide XI site BSGMAPEHAQ [40]. The obtained maximum adsorption capacity (Qmax ) for phosphate by BSGMAEDAQ and BSGMAPEHAQ have been 85.99 and 152.21 mg/g, respectively. The values had been relatively larger compared with other equivalent adsorbents shown in Table 3.Table three. Comparison of adsorption capacity of BSGMAEDAQ and BSGMAPEHAQ with other readily available sawdust. Adsorbent woody sawdust nanoparticles polypyrrolecoated sawdust aminecrosslinked Shaddock Peel diethylamine modified Cellulose modified sugarcane bagasse wheat straw anion exchanger Amine crosslinked tea waste BSGMAEDAQ Modified aleppo pine sawdust BSGMAPEHAQ Max Adsorption Capacity (mg/g) 50 17.330.39 59.89 22.88 21.three 52.80 98.72 85.25 116.25 152.21 7 six 7 three six.eight 7 pH 7 Reference [41] [42] [43] [44] [45] [46] [47] This paper [40] This paper3.4. Regeneration To evaluate the reusability of BSGMAEDAQ and BSGMAPEHAQ, the adsorptiondesorption cycles were repeated 5 times making use of 1 M HCl because the elution reagent. Figure 10 shows that BSGMAEDAQ and BSGMAPEHAQ possess a negligible decrease in adsorption capacity right after 5 adsorption esorption cycles, indicating that BSGMAEDAQ and BSGMAPEHAQ have been steady and recyclable for phosphate removal.Figure ten. The adsorption esorption cycles of BSGMAEDAQ and BSGMAPEHAQ for phosphate.Appl. Sci. 2021, 11,12 of4. Conclusions Two BSbased adsorbents have been effectively synthesized by grafting GMA on BS utilizing the RIGP approach, followed by a ringopening reaction and quaternization. The adsorption performance of BSGMAEDAQ and BSGMAPEHAQ adsorbents for phosphate removal was investigated. (1) (2) Following quaternization, BSGMAEDAQ and BSGMAPEHAQ showed a high adsorption capacity for phosphate. The adsorption capacity was independent to pH. The adsorption kinetics of BSGMAEDAQ and BSGMAPEHAQ nicely obeyed the pseudosecondorder model. The phosphate uptake reached equilibrium inside 180 min. BSGMAEDAQ and BSGMAPEHAQ adsorbents for phosphate removal well obeyed the Langmuir model. The maximum phosphate adsorption capacities of BSGMAEDAQ and BSGMAPEHAQ were 85.25 and 152.21 mg/g, respectively. The repeated use showed that the adsorption overall performance on the BSGMAEDAQ and BSGMAPEHAQ adsorbents displayed a negligible reduce after five cycles. Thus, the BSGMAEDAQ and BSGMAPEHAQ adsorbents exhibit good recyclability and can be utilized repeatedly in practical applications.(three)(four)Author Contributions: Conceptualization: Z.D.; formal evaluation: J.D., H.X.; investigation: J.D., Z.D.; information curation: X.Y., H.X.; writingoriginal draft preparation: J.D., J.Y.; writingreview and editing: L.Z., J.Y.; visualization: L.Z.; supervision: L.Z.; funding acquisition: J.D., H.X. All authors have study and agreed for the published version on the manuscript. Funding: This analysis was funded by “Hubei Provincial Natural Science Foundation, China, grant quantity 2020CFB852”, Analysis Project.