Exploring the impact of intensity and duration of Cu (II) depression on aniline-degrading biosystem: Performance, sludge activity and microbial diversity

Su, Junhao; Zhang, Qian; Peng, Haojin; Feng, Jiapeng; He, Jing; Zhang, Yunjie; Lin, Bing; Wu, Nanping; Xiang, Yutong

doi:10.1016/j.biortech.2022.127548

Cited by 13 publications

(2 citation statements)

References 46 publications

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“…Figure 3 reveals that addition of complex HM significantly inhibited pollutant removal, while AGS exhibited adaptive and rebound trends in later stages. As shown in Figure 3A, AGS efficiently removed COD (>90%) during the initial phase of HM addition, but the efficiency dropped to 60% given rise to the impact of HM accumulation after one week, which corroborates previous findings that Cu(II) inhibits COD degradation (Su et al, 2022). Following gradual adaptation, COD removal rebounded and stabilized around -N remained stable at a lower level (Supplementary Figure S3B), possibly due to inhibition of denitrification by Cr(III) and Ni(II) (Ramírez et al, 2018;Jiang et al, 2020).…”

Section: Pollutant Removal Performancesupporting

confidence: 90%

Aerobic granular sludge for complex heavy metal-containing wastewater treatment: characterization, performance, and mechanisms analysis

Liu,

Shen,

et al. 2024

Front. Microbiol.

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Complex heavy metal (HM)-containing wastewater discharges pose substantial risks to global water ecosystems and human health. Aerobic granular sludge (AGS) has attracted increased attention as an efficient and low-cost adsorbent in HM-containing wastewater treatment. Therefore, this study systematically evaluates the effect of Cu(II), Ni(II), and Cr(III) addition on the characteristics, performance and mechanism of AGS in complex HM-containing wastewater treatment process by means of fourier transform infrared spectroscopy, inductively coupled plasma spectrocopcy, confocal laser scanning microscopy, extracellular polymeric substances (EPS) fractions detection and scanning electron microscope-energy dispersive X-ray. The results showed that AGS efficiently eliminated Cu(II), Ni(II), and Cr(III) by the orchestrated mechanisms of ion exchange, three-layer EPS adsorption [soluble microbial products EPS (SMP-EPS), loosely bound EPS (LB-EPS), tightly bound EPS (TB-EPS)], and inner-sphere adsorption; notably, almost 100% of Ni(II) was removed. Three-layer EPS adsorption was the dominant mechanism through which the HM were removed, followed by ion exchange and inner-sphere adsorption. SMP-EPS and TB-EPS were identified as the key EPS fractions for adsorbing Cr(III) and Cu(II), respectively, while Ni(II) was adsorbed evenly on SMP-EPS, TB-EPS, and LB-EPS. Moreover, the rates at which the complex HM penetrated into the granule interior and their affinity for EPS followed the order Cu(II) > Ni(II) > Cr(III). Ultimately, addition of complex HM stimulated microorganisms to excrete massive phosphodiesterases (PDEs), leading to a pronounced decrease in cyclic diguanylate (c-di-GMP) levels, which subsequently suppressed EPS secretion due to the direct linkage between c-di-GMP and EPS. This study unveils the adaptability and removal mechanism of AGS in the treatment of complex HM-containing wastewater, which is expected to provide novel insights for addressing the challenges posed by intricate real wastewater scenarios.

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Section: Pollutant Removal Performancesupporting

confidence: 90%

Aerobic granular sludge for complex heavy metal-containing wastewater treatment: characterization, performance, and mechanisms analysis

Liu,

Shen,

et al. 2024

Front. Microbiol.

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“…8 On the other hand, a high concentration of NH 4 + -N can increase the nitrification load of the treatment process, resulting in the effluent NH 4 + -N and total nitrogen (TN) content exceeding the standard. 9 Aniline degradation and simultaneous nitrogen removal have become bottle-necks in aniline wastewater treatment. Therefore, aniline degradation and simultaneous biological nitrogen removal are of great research significance.…”

Section: Introductionmentioning

confidence: 99%

Solving the problem of high concentration aniline inhibiting nitrogen removal: starting the SBBR with the prolonged aeration mode

Lin

Zhang

et al. 2023

Environ. Sci.: Water Res. Technol.

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Unraveling the nexus of Cr (VI), aniline, and microbial ecology on aniline-degrading biosystem: Removal efficiency, sludge type, microbial ecology

Lin,

Tan,

Zhang

et al. 2023

Bioresource Technology

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Exploring the impact of intensity and duration of Cu (II) depression on aniline-degrading biosystem: Performance, sludge activity and microbial diversity

Cited by 13 publications

References 46 publications

Aerobic granular sludge for complex heavy metal-containing wastewater treatment: characterization, performance, and mechanisms analysis

Aerobic granular sludge for complex heavy metal-containing wastewater treatment: characterization, performance, and mechanisms analysis

Solving the problem of high concentration aniline inhibiting nitrogen removal: starting the SBBR with the prolonged aeration mode

Unraveling the nexus of Cr (VI), aniline, and microbial ecology on aniline-degrading biosystem: Removal efficiency, sludge type, microbial ecology

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