دورية أكاديمية
أعرض في EDS

Sequential hydrotalcite precipitation, microbial sulfate reduction and in situ hydrogen sulfide removal for neutral mine drainage treatment.

التفاصيل البيبلوغرافية
العنوان: Sequential hydrotalcite precipitation, microbial sulfate reduction and in situ hydrogen sulfide removal for neutral mine drainage treatment.
المؤلفون: Cheng KY; CSIRO Environment, 147 Underwood Avenue, Floreat, Western Australia (WA) 6014, Australia; School of Engineering & Energy, Murdoch University, WA 6150, Australia. Electronic address: kayu.cheng@csiro.au., Acuña CR; CSIRO Environment, 147 Underwood Avenue, Floreat, Western Australia (WA) 6014, Australia., Kaksonen AH; CSIRO Environment, 147 Underwood Avenue, Floreat, Western Australia (WA) 6014, Australia; Western Australian School of Mines: Minerals, Energy and Chemical Engineering, Faculty of Science and Engineering, Curtin University, Bentley, Australia; School of Engineering, University of Western Australia, Crawley, WA 6009, Australia., Esslemont G; Evolution Mining Mt Rawdon Operations Pty Ltd, Australia., Douglas GB; CSIRO Environment, 147 Underwood Avenue, Floreat, Western Australia (WA) 6014, Australia; School of Molecular and Life Sciences, Curtin University, Bentley, WA 5102, Australia.
المصدر: The Science of the total environment [Sci Total Environ] 2024 May 20; Vol. 926, pp. 171537. Date of Electronic Publication: 2024 Mar 07.
نوع المنشور: Journal Article
اللغة: English
بيانات الدورية: Publisher: Elsevier Country of Publication: Netherlands NLM ID: 0330500 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1879-1026 (Electronic) Linking ISSN: 00489697 NLM ISO Abbreviation: Sci Total Environ Subsets: MEDLINE
أسماء مطبوعة: Original Publication: Amsterdam, Elsevier.
مواضيع طبية MeSH: Hydrogen Sulfide* , Aluminum Hydroxide* , Magnesium Hydroxide*, RNA, Ribosomal, 16S ; Nitrates ; Sulfates/chemistry ; Bioreactors
مستخلص: This study proposed and examined a new process flowsheet for treating neutral mine drainage (NMD) from an open-pit gold mine. The process consisted of three sequential stages: (1) in situ hydrotalcite (HT) precipitation; (2) low-cost carbon substrate driven microbial sulfate reduction; and (3) ferrosol reactive barrier for removing biogenic dissolved hydrogen sulfide (H 2 S). For concept validation, laboratory-scale columns were established and operated for a 140-days period with key process performance parameters regularly measured. At the end, solids recovered from various depths of the ferrosol column were analysed for elemental composition and mineral phases. Prokaryotic microbial communities in various process locations were characterised using 16S rRNA gene sequencing. Results showed that the Stage 1 HT-treatment substantially removed a range of elements (As, B, Ba, Ca, F, Zn, Si, and U) in the NMD, but not nitrate or sulfate. The Stage 2 sulfate reducing bioreactor (SRB) packed with 70 % (v/v) Eucalyptus woodchip, 1 % (w/v) ground (<1 mm) dried Typha biomass, and 10 % (w/v) NMD-pond sediment facilitated complete nitrate removal and stable sulfate removal of ca. 50 % (50 g-SO 4 m -3 d -1 ), with an average H 2 S generation rate of 10 g-H 2 S m -3 d -1 . The H 2 S-removal performance of the Stage 3 ferrosol column was compared with a synthetic amorphous Fe-oxyhydroxide-amended sand control column. Although both columns facilitated excellent (95-100 %) H 2 S removal, the control column only enabled a further ca. 10 % sulfate reduction, giving an overall sulfate removal of 56 %. In contrast, the ferrosol enabled an extra 99.9 % sulfate reduction in the SRB effluent, leading to a near complete sulfate removal. Overall, the process successfully eliminated a range of metal/metalloid contaminants, nitrate, sulfate (2500 mg-SO 4 L -1 in the NMD to <10 mg-SO 4 L -1 in the final effluent) and H 2 S (>95 % removal). Further optimisation is required to minimise release of ferrous iron from the ferrosol barrier into the final effluent.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 The Authors. Published by Elsevier B.V. All rights reserved.)
فهرسة مساهمة: Keywords: Biological sulfate reduction; Constructed wetland; Ferrosol; Hydrotalcite precipitation; Neutral mine drainage; Wood chips
المشرفين على المادة: YY9FVM7NSN (Hydrogen Sulfide)
17432CG1KU (hydrotalcite)
0 (RNA, Ribosomal, 16S)
0 (Nitrates)
0 (Sulfates)
5QB0T2IUN0 (Aluminum Hydroxide)
NBZ3QY004S (Magnesium Hydroxide)
تواريخ الأحداث: Date Created: 20240309 Date Completed: 20240417 Latest Revision: 20240417
رمز التحديث: 20240417
DOI: 10.1016/j.scitotenv.2024.171537
PMID: 38460684
قاعدة البيانات: MEDLINE
الوصف
تدمد:1879-1026
DOI:10.1016/j.scitotenv.2024.171537