skip to main content
Ngôn ngữ:
Giới hạn tìm kiếm: Giới hạn tìm kiếm: Dạng tài nguyên Hiển thị kết quả với: Hiển thị kết quả với: Chỉ mục

Characterization of changes in floc morphology, extracellular polymeric substances and heavy metals speciation of anaerobically digested biosolid under treatment with a novel chelated-Fe2+ catalyzed Fenton process

He, Juanjuan ; Yang, Peng ; Zhang, Weijun ; Cao, Bingdi ; Xia, Hua ; Luo, Xi ; Wang, Dongsheng

Bioresource Technology, November 2017, Vol.243, pp.641-651 [Tạp chí có phản biện]

ISSN: 0960-8524 ; DOI: 10.1016/j.biortech.2017.06.180

Toàn văn sẵn có

Phiên bản sẵn có
Trích dẫn Trích dẫn bởi
  • Nhan đề:
    Characterization of changes in floc morphology, extracellular polymeric substances and heavy metals speciation of anaerobically digested biosolid under treatment with a novel chelated-Fe2+ catalyzed Fenton process
  • Tác giả: He, Juanjuan ; Yang, Peng ; Zhang, Weijun ; Cao, Bingdi ; Xia, Hua ; Luo, Xi ; Wang, Dongsheng
  • Chủ đề: Anaerobically Digested Sludge ; Chelating Agents ; Dewaterability ; Extracellular Polymeric Substances (EPS) ; Fenton Oxidation ; Heavy Metals
  • Là 1 phần của: Bioresource Technology, November 2017, Vol.243, pp.641-651
  • Mô tả: •Chelated-Fe2+ catalyzed Fenton process (CCFP) could improve sludge dewaterability.•Highly oxidative radicals (OH and HO2-) were responsible for sludge breakage.•Bound water trapped in EPS was converted into free water in CCFP.•Oxidizable and reducible fractions heavy metals were transformed into soluble fraction. A novel chelated-Fe2+ catalyzed Fenton process (CCFP) was developed to enhance dewatering performance of anaerobically digested biosolid, and changes in floc morphology, extracellular polymeric substances (EPS) and heavy metals speciation were also investigated. The results showed that addition of chelating agents caused EPS solubilization by binding multivalent cations. Like traditional Fenton, CCFP performed well in improving anaerobically digested sludge dewatering property. The highly active radicals (OH, O2−) produced in classical Fenton and CCFP were responsible for sludge flocs destruction and consequently degradation of biopolymers into small molecules. Furthermore, more plentiful pores and channels were presented in cake after Fenton treatment, which was conducive to water drainage under mechanical compression. Additionally, a portion of active heavy metals in the form of oxidizable and reducible states were dissolved under CCFP. Therefore, CCFP could greatly simplify the operating procedure of Fenton conditioning and improve its process adaptability for harmless treatment of biological sludge.
  • Ngôn ngữ: English
  • Số nhận dạng: ISSN: 0960-8524 ; DOI: 10.1016/j.biortech.2017.06.180

Đang tìm Cơ sở dữ liệu bên ngoài...