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Bisphenol A adsorption and transport in loess and cationic surfactant/hydrophilic polymer modified bentonite liners.
Xie, Haijian; Wu, Jiawei; Yu, Mengzhen; Yan, Huaxiang; Masum, Shakil; Cai, Peifu; Chen, Yun.
Afiliación
  • Xie H; College of Civil Engineering and Architecture, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, China; Center for Balance Architecture, Zhejiang University, 148 Tianmushan Road, Hangzhou, 310007, China.
  • Wu J; College of Civil Engineering and Architecture, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, China; The Architectural Design and Research Institute of Zhejiang University Co. Ltd, 148 Tianmushan Rd, Hangzhou, 310058, China.
  • Yu M; College of Civil Engineering and Architecture, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, China; Center for Balance Architecture, Zhejiang University, 148 Tianmushan Road, Hangzhou, 310007, China.
  • Yan H; College of Civil Engineering and Architecture, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, China. Electronic address: yanhuaxiang@zju.edu.cn.
  • Masum S; Geoenvironmental Research Centre, Cardiff University, S Glam, Cardiff, Wales, CF24 3AA, UK.
  • Cai P; College of Civil Engineering and Architecture, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, China; Center for Balance Architecture, Zhejiang University, 148 Tianmushan Road, Hangzhou, 310007, China.
  • Chen Y; Center for Balance Architecture, Zhejiang University, 148 Tianmushan Road, Hangzhou, 310007, China; The Architectural Design and Research Institute of Zhejiang University Co. Ltd, 148 Tianmushan Rd, Hangzhou, 310058, China.
J Environ Manage ; 336: 117604, 2023 Jun 15.
Article en En | MEDLINE | ID: mdl-36871453
Bisphenol A (BPA) is a toxic endocrine disruptor often found in landfill leachate. Adsorption behaviors and mechanisms of BPA onto organo-bentonites amended loess, e.g., Hexadecyltrimethylammonium chloride-bentonite (HTMAC-B) and Carboxymethylcellulose-bentonite (CMC-B) were experimentally investigated. The adsorption capacity of loess amended by HTMAC-B (LHB) and CMC-B (LCB) is 4.2 and 4 times greater than that of loess (L), respectively. It is attributed to the increase of hydrogen bonds and hydrophobic lateral interactions between the adsorbent and the adsorbate. The binary (Pb2+-BPA) systems may enhance BPA adsorption onto the samples by the formation of coordination bonds between the hydroxyl group of BPA and Pb2+ ions. A cycled column test was used for investigating the transport behavior of BPA in LHB and LCB samples. The hydraulic conductivity of loess amended by the organo-bentonite (e.g., HTMAC-B, CMC-B) is generally lower than 1 × 10-9 m/s. Especially for CMC-B amended loess, the hydraulic conductivity can be reduced to 1 × 10-12 m/s. This guarantees the hydraulic performance of the liner system. Transport behavior of BPA in cycled column test is explained by the mobile-immobile model (MIM). Modelling results showed that loess amended by organo-bentonites can increase the breakthrough time of BPA. In comparison to loess-based liner, the breakthrough time of BPA for LHB and LCB can be increased by a factor of 10.4 and 7.5, respectively. These results indicate that organo-bentonites can serve as a potentially effective amendment for improving the adsorption of loess-based liners.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Contaminantes Químicos del Agua / Plomo Tipo de estudio: Prognostic_studies Idioma: En Revista: J Environ Manage Año: 2023 Tipo del documento: Article País de afiliación: China Pais de publicación: Reino Unido
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Contaminantes Químicos del Agua / Plomo Tipo de estudio: Prognostic_studies Idioma: En Revista: J Environ Manage Año: 2023 Tipo del documento: Article País de afiliación: China Pais de publicación: Reino Unido