DOI: 10.1016/j.watres.2018.08.004
Scopus记录号: 2-s2.0-85053039711
论文题名: Bioaugmented soil aquifer treatment for P-nitrophenol removal in wastewater unique for cold regions
作者: Zhang X. ; Yang Y.S. ; Lu Y. ; Wen Y.J. ; Li P.P. ; Zhang G.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 144 起始页码: 616
结束页码: 627
语种: 英语
英文关键词: Bioaugmentation
; Low temperature
; P-nitrophenol
; Removal efficiency
; Soil aquifer treatment (SAT)
Scopus关键词: Aquifers
; Bacteria
; Degradation
; Efficiency
; Organic chemicals
; Organic pollutants
; Phenols
; Removal
; Soil pollution
; Soils
; Temperature
; Wastewater treatment
; Bio-augmentation
; Low temperatures
; p-Nitrophenol
; Removal efficiencies
; Soil aquifer treatments
; Groundwater pollution
; aquifer
; bacterium
; bioaugmentation
; biodegradation
; low temperature
; organic pollutant
; phenolic compound
; pollutant removal
; vadose zone
; wastewater treatment
; Bacteria (microorganisms)
英文摘要: P-nitrophenol (PNP) is a toxic and recalcitrant organic pollutant and a usual intermediate in the production of fine chemicals, which has posed a significant threat to subsurface environment safety. Soil aquifer treatment (SAT) is a promising method to remove and remediate contamination in vadose zone with low cost and high efficiency. However, there are still research gaps for the treatment of recalcitrant contaminants by SAT in cold regions, such as un-robust indigenous microbes and low temperature constraint in vadose zone. The bioaugmentation technology was first introduced into SAT in order to enhance the removal ability of PNP by SAT operated in cold regions in this study. A high-efficiency PNP-degrading bacterium was successfully isolated, which can efficiently degrade PNP below 200 mg L−1 with a degradation rate above 99% at 15 °C close to the real subsurface temperature in cold regions, and added into SAT for bioaugmentation. The feasibility of bioaugmented SAT and associated PNP removal process were investigated by laboratory sand columns, along with effects of the SAT operative parameters (namely PNP loading concentration, flow rate and soil saturation level of SAT). Within the range of PNP loading stresses tested (1–200 mg L−1), PNP removal efficiency was optimal at constant flow rate of 219 mL d−1 in unsaturated operating condition of SAT under 15 °C among all the investigated experimental conditions. Longer hydraulic residence time increased the PNP removal rate, although the accumulated mass removed reduced and the removal efficiencies remained constant in unsaturated operating condition of SAT. It is found from the comparison between the PNP removals via both unsaturated and saturated columns that slight difference only in the removal rate of PNP was observed and the highly efficient bioaugmented SAT can completely degrade PNP of 10 mg L−1 within 5 wetting/drying cycles under both scenarios. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112527
Appears in Collections: 气候减缓与适应
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作者单位: Key Laboratory of Groundwater Resources and Environment (Jilin University), Ministry of Education, Changchun, 130021, China; Key Laboratory of Eco-restoration of Region Polluted Environment (Shenyang University), Ministry of Education, Shenyang, 110044, China
Recommended Citation:
Zhang X.,Yang Y.S.,Lu Y.,et al. Bioaugmented soil aquifer treatment for P-nitrophenol removal in wastewater unique for cold regions[J]. Water Research,2018-01-01,144