Repository logo
  • English
  • 中文
Log In
Have you forgotten your password?
  1. Home
  2. College of Bioresources and Agriculture / 生物資源暨農學院
  3. Agricultural Chemistry / 農業化學系
  4. Sorption mechanisms of lead on silicon-rich biochar in aqueous solution: Spectroscopic investigation
 
  • Details

Sorption mechanisms of lead on silicon-rich biochar in aqueous solution: Spectroscopic investigation

Journal
Science of The Total Environment
Journal Volume
672
Date Issued
2019
Author(s)
Jianhong Li
Lirong Zheng
Shan-Li Wang
Zhipeng Wu
Weidong Wu
Nabeel Khan Niazi
Sabry M. Shaheen
Jorg Rinklebe
Nanthi Bolan
Yong Sik Ok
Hailong Wang
SHAN-LI WANG  
DOI
10.1016/j.scitotenv.2019.04.003
56007797
URI
https://scholars.lib.ntu.edu.tw/handle/123456789/446362
URL
https://doi.org/10.1016/j.scitotenv.2019.04.003
Abstract
© 2019 Unraveling sorption mechanisms of lead (Pb) to silicon (Si)-rich biochar at molecular scale in aqueous solution are essential for the effective application of the biochars to the remediation of Pb and other metal(loid)s pollution in the environment. Thus, this study investigated the contributions of phytoliths and other compounds to the Pb sorption on Si-rich coconut fiber biochar (CFB500) and the corresponding sorption mechanisms using spectroscopic techniques, including the micro-X-ray fluorescence (μ-XRF), X-ray absorption fine structure (XAFS), scanning electron microscopy combined with energy dispersive X-ray spectroscopy, and X-ray diffraction. The μ-XRF and XAFS results showed that K, Ca, Cu, Mn, and Fe were released and significantly related to Pb in Pb-loaded CFB500; four major Pb species were formed with similar structures to lead carboxylate (e.g., Pb(C 2 H 3 O 2 ) 2 ), Pb 3 (PO 4 ) 2 , PbSiO 3 , and PbCO 3 . On phytoliths in CFB500, Pb 2+ ions were mainly sorbed on the sites of silicate with a structure similar to PbSiO 3 . The contribution of binding sites for Pb 2+ sorption was ascribed to the outer-wall of carbon skeleton of CFB500, which was stronger than that provided by the mineral oxide aggregate and phytoliths on CFB500. Organic carbon functional groups, inorganic carbonates, silicates and phosphates on CFB500 mostly dominated the sorption sites for Pb 2+ . Our results suggest that CFB500 was a promising material for the remediation of Pb-contaminated aqueous environments (e.g., wastewater).
Unraveling sorption mechanisms of lead (Pb) to silicon (Si)-rich biochar at molecular scale in aqueous solution are essential for the effective application of the biochars to the remediation of Pb and other metal(loid)s pollution in the environment. Thus, this study investigated the contributions of phytoliths and other compounds to the Pb sorption on Si-rich coconut fiber biochar (CFB500) and the corresponding sorption mechanisms using spectroscopic techniques, including the micro-X-ray fluorescence (μ-XRF), X-ray absorption fine structure (XAFS), scanning electron microscopy combined with energy dispersive X-ray spectroscopy, and X-ray diffraction. The μ-XRF and XAFS results showed that K, Ca, Cu, Mn, and Fe were released and significantly related to Pb in Pb-loaded CFB500; four major Pb species were formed with similar structures to lead carboxylate (e.g., Pb(C 2 H 3 O 2 ) 2 ), Pb 3 (PO 4 ) 2 , PbSiO 3 , and PbCO 3 . On phytoliths in CFB500, Pb 2+ ions were mainly sorbed on the sites of silicate with a structure similar to PbSiO 3 . The contribution of binding sites for Pb 2+ sorption was ascribed to the outer-wall of carbon skeleton of CFB500, which was stronger than that provided by the mineral oxide aggregate and phytoliths on CFB500. Organic carbon functional groups, inorganic carbonates, silicates and phosphates on CFB500 mostly dominated the sorption sites for Pb 2+ . Our results suggest that CFB500 was a promising material for the remediation of Pb-contaminated aqueous environments (e.g., wastewater). © 2019
Subjects
Phytoliths skeleton | SEM-EDS | Sorption sites | Toxic metal(loid)s | XAFS | μ-XRF
Phytoliths skeleton; SEM-EDS; Sorption sites; Toxic metal(loid)s; XAFS; μ-XRF
SDGs

[SDGs]SDG6

Other Subjects
Absorption spectroscopy; Binding sites; Carboxylation; Energy dispersive spectroscopy; Lead compounds; Musculoskeletal system; Organic carbon; Scanning electron microscopy; Silicates; Silicon; Sorption; X ray absorption; Phytoliths skeleton; SEM-EDS; Sorption sites; Toxic metals; XAFS; Boron compounds; biochar; calcium; carbonic acid; charcoal; copper; iron; lead; manganese; organic carbon; phosphate; potassium; silicate; silicon; unclassified drug; biochar; charcoal; lead; silicon; aqueous solution; biochar; lead; phytolith; remediation; scanning electron microscopy; silicon; sorption; spectral analysis; wastewater treatment; X-ray diffraction; aqueous solution; Article; binding site; chemical structure; controlled study; ecosystem restoration; energy dispersive X ray spectroscopy; microfluorometry; particle size; pollution; priority journal; scanning electron microscopy; sorption detoxification; spectroscopy; waste water; X ray absorption near edge structure spectroscopy; X ray diffraction; X ray fluorescence spectrometry; adsorption; chemistry; water pollutant; Adsorption; Charcoal; Lead; Silicon; Water Pollutants, Chemical
Publisher
Elsevier {BV}
Type
journal article

臺大位居世界頂尖大學之列,為永久珍藏及向國際展現本校豐碩的研究成果及學術能量,圖書館整合機構典藏(NTUR)與學術庫(AH)不同功能平台,成為臺大學術典藏NTU scholars。期能整合研究能量、促進交流合作、保存學術產出、推廣研究成果。

To permanently archive and promote researcher profiles and scholarly works, Library integrates the services of “NTU Repository” with “Academic Hub” to form NTU Scholars.

總館學科館員 (Main Library)
醫學圖書館學科館員 (Medical Library)
社會科學院辜振甫紀念圖書館學科館員 (Social Sciences Library)

開放取用是從使用者角度提升資訊取用性的社會運動,應用在學術研究上是透過將研究著作公開供使用者自由取閱,以促進學術傳播及因應期刊訂購費用逐年攀升。同時可加速研究發展、提升研究影響力,NTU Scholars即為本校的開放取用典藏(OA Archive)平台。(點選深入了解OA)

  • 請確認所上傳的全文是原創的內容,若該文件包含部分內容的版權非匯入者所有,或由第三方贊助與合作完成,請確認該版權所有者及第三方同意提供此授權。
    Please represent that the submission is your original work, and that you have the right to grant the rights to upload.
  • 若欲上傳已出版的全文電子檔,可使用Open policy finder網站查詢,以確認出版單位之版權政策。
    Please use Open policy finder to find a summary of permissions that are normally given as part of each publisher's copyright transfer agreement.
  • 網站簡介 (Quickstart Guide)
  • 使用手冊 (Instruction Manual)
  • 線上預約服務 (Booking Service)
  • 方案一:臺灣大學計算機中心帳號登入
    (With C&INC Email Account)
  • 方案二:ORCID帳號登入 (With ORCID)
  • 方案一:定期更新ORCID者,以ID匯入 (Search for identifier (ORCID))
  • 方案二:自行建檔 (Default mode Submission)
  • 方案三:學科館員協助匯入 (Email worklist to subject librarians)

Built with DSpace-CRIS software - Extension maintained and optimized by 4Science