Batch and fixed-bed column studies of selenite removal from contaminated water by orange peel-based sorbent  

作　　者：Barbara Perez Mora Fernando A.Bertoni María F.Mangiameli Juan C.Gonzalez Sebastian E.Bellu 

机构地区：[1]Faculty of Biochemical and Pharmaceutical Sciences,National University of Rosario,Rosario S2002LRK,Argentina [2]Chemistry Institute of Rosario,National Council of Scientific and Technological Research,Rosario S2002LRK,Argentina

出　　处：《Water Science and Engineering》2020年第4期307-316,共10页水科学与水工程（英文版）

基　　金：This work was supported by the National Agency of Scientific and Technological Promotion(Grant No.PICT 2016-1611);the Santa Fe Province Agency of Science,Technology and Innovation(Grant No.AC 2015-0005);National University of Rosario(Grant No.BIO517).

摘　　要：Orange peel is a biomass derived from citrus processing with desirable properties for metal sorption.In recent years,orange peel has been used to remove various heavy metals and toxic oxyanions.Selenium(Se)is an essential trace element for mammals.However,when the concentration of selenium exceeds an umbral limit,it becomes toxic.In this study,orange peel was used to treat Se(IV)-contaminated water.A high sorption capacity of 32.5 mg/g was obtained at a temperature of 20℃and a pH of 2.0.Hydroxyl groups bound Se(IV)to the surface of the orange peel.The sorption process was spontaneous and endothermic.A chemical sorption mechanism was involved in the removal of Se(IV).The Thomas and modified dose-response models were used to simulate the experimental breakthrough curves.The bed depth service time model was used to calculate the critical bed depth(Z0),and the calculated Z0 value was 1.6 cm.This study reveals that orange peel is a useful sorbent for Se(IV),and can be used for the purification of Se(IV)-contaminated water.©2020 Hohai University.Production and hosting by Elsevier B.V.This is an open access article under the CC BY-NC-ND license(http://creativecommons.org/licenses/by-nc-nd/4.0/).

关 键 词：SORPTION Orange peel Removal of heavy metal Selenium-contaminated water SORBENT Breakthrough curve 

分 类 号：X703[环境科学与工程—环境工程]