rdf-syntax-grammar
mods:
  schema location: http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
  title info:
    title: Nghiên cứu khả năng hấp phụ Nitrate và Ammonium của than sinh học trấu
  title info:
    sub title: Luận văn tốt nghiệp Cao học. Chuyên ngành Khoa học môi trường
  title info: title
  name:
    name part: Trần, Yến Nhi
    role:
      role term: creator
  type of resource: text
  origin info:
    place:
      place term: xx
    place:
      place term: Cần Thơ
    publisher: Trường Đại học Cần Thơ
    date issued: 2020
    date issued: 9999
    issuance: monographic
  language:
    language term: und
  physical description:
    form: print
  abstract: Đề tài “Nghiên cứu khả năng hấp phụ Nitrate và Ammonium của than sinh học trấu” được thực hiện với mục đích nghiên cứu nhằm khảo sát khả năng hấp phụ của than sinh học trấu đối với nitrate và ammonium trong việc ứng dụng giảm thiểu ô nhiễm môi trường. Các thí nghiệm được tiến hành nhằm tìm ra các giá trị tốt nhất với hiệu suất hấp phụ cao phù hợp cho quá trình hấp phụ của than sinh học trấu ở nhiệt độ 700°C. Nghiên cứu đã thực hiện các thí nghiệm: Xác định pHpzc tại điểm không điện tích; ảnh hưởng của pH, khối lượng, thời gian và nồng độ ảnh hưởng đến khả năng hấp phụ của than sinh học trấu, mô hình động lực học hấp phụ biểu kiến bậc 1 và bậc 2, mô hình đẳng nhiệt hấp phụ Langmuir và Freundlich. Nghiên cứu cho thấy than sinh học trấu có khả năng hấp phụ ammonium (NH⁴⁺) tốt nhất ở nồng độ 80 mg/L với lượng hấp phụ là 1,051mg/g (25,24%) ở pH bằng 8, đối với nitrate (NO₃ˉ) nồng độ 50 mg/L với lƣợng hấp phụ là 1,613mg/g (60,90%) ở pH bằng 4. Các kết quả này thu đƣợc ở 1g than sinh học và trạng thái cân bằng đạt được sau thời gian tiếp xúc là 120 phút. Với hai mô hình động lực học biểu kiến bậc 1,bậc 2 cho quá trình hấp phụ nitrate, ammonium của than sinh học trấu đều phù hợp, với hệ số tương quan R2>0,95. Quá trình hấp phụ ammonium và nitrate của than sinh học trấu ở các điều kiện trên phù hợp với mô hình đẳng nhiệt hấp phụ Langmuir hơn so với mô hình Freundich, với qmax ammonium là 2,414 mg/g và qmax nitrate là 6,465 mg/g.
  note: Trần Yến Nhi ; Nguyễn Xuân Lộc (Cán bộ hướng dẫn)
  subject:
    topic: Nước,Water
  subject:
    topic: Ô nhiễm,Pollution
  classification: 363.7394
  classification: Nh300
  record info:
    record creation date: 210402
    record identifier: CTU_239473