Biochar as simultaneous shelter, adsorbent, pH buffer, and substrate of Pseudomonas citronellolis to promote biodegradation of high concentrations of phenol in wastewater

Zhao, Ling; Xiao, Donglin; Liu, Yang; Xu, Huacheng; Nan, Haiyan; Li, Deping; Kan, Yue; Cao, Xinde

doi:10.1016/j.watres.2020.115494

Cited by 178 publications

(45 citation statements)

References 55 publications

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“…After immobilization, the removal rates of CTC degrading bacteria increased by 18.77% and 3.46% (HBCM and CSBM), respectively, indicating that immobilization improved the degradation performance of the microorganisms. This may be because the pore structure of biochar can provide an internal living environment for microorganisms to protect them from external pollutants, allowing them to increase their survival rate in an antibiotic-contaminated environment (Zhao et al 2020). The removal rates of CTC by HBCM and CSBM were 56.16% and 40.85%, respectively.…”

Section: Removal Capacity Analysismentioning

confidence: 99%

Removal of chlortetracycline from water by immobilized Bacillus subtilis on honeysuckle residue derived biochar

Wang

2021

Preprint

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Biochar-immobilized microorganism technology is an effective way to remove antibiotic contamination in aqueous solutions. In this study, the effect and mechanism of immobilization of Bacillus subtilis by honeysuckle residue derived biochar for the removal of chlortetracycline(CTC) were investigated using corn straw biochar as a control. The biochar's structural characteristics and properties were determined using scanning electron microscopy, X-ray diffractometer, Fourier transform infrared spectrometer, specific surface area and pore size analyzer. It was found that honeysuckle residue derived biochar had a well-developed pore structure, which provided adequate living space for microorganisms. The removal rate of CTC (50 mg/L) by honeysuckle residue biochar-microbial complex(HBCM) was 15.31% higher than that of corn straw biochar-microbial complex, indicating that HBCM was an excellent carrier. The mechanism of CTC removal by HBCM was a synergistic effect of biochar adsorption and microbial degradation. The removal process of HBCM material was carried out for 3 days at an optimum substrate concentration of 50 mg/L, ambient temperature of 35°C, solution pH of 7 and the addition of 5 g/L complexes, achieving a removal rate of 78.35%. In addition, the complex possessed high storage stability and could be reused three times continuously and efficiently. This study provides a method for preparing an efficient biochar-microbial complex using Chinese medicine residue waste substrate, which provides a new idea for removing CTC from water.

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Section: Removal Capacity Analysismentioning

confidence: 99%

Removal of chlortetracycline from water by immobilized Bacillus subtilis on honeysuckle residue derived biochar

Wang

2021

Preprint

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“…In practical environment, the pH of polluted water which is often not a neutral environment, has a great influence on the removal of phenol by bacteria. Therefore, it is meaningful to explore the effect of pH on the degradation of phenol by immobilized and free bacteria (Xu et al 2010a(Xu et al , 2010bZhao et al 2020). On the 120 h of degradation for 1,000 mg/L phenol, the degradation efficiency of immobilized bacteria is 63.3% at pH 7, while the free bacteria is 50.7% (Figure 5), which is weaker than that of immobilized bacteria.…”

Section: The Effect Of Ph On Phenol Degradation By Bacteriamentioning

confidence: 99%

“…The immobilization of microorganism which can protect microorganisms or cells from the high level of pollutions is an alternative strategy to facilitate the degradation (Zhao et al 2020). Many carriers have been studied for the immobilization, including inorganic materials, polymers, biochar, natural biomass, and so on (Lv et al 2016;Basak et al 2019;Xia et al 2019;Swain et al 2020;Zofair et al 2020).…”

Section: Introductionmentioning

confidence: 99%

“…Many carriers have been studied for the immobilization, including inorganic materials, polymers, biochar, natural biomass, and so on (Lv et al 2016;Basak et al 2019;Xia et al 2019;Swain et al 2020;Zofair et al 2020). Biomass and its derivatives have been widely studied as immobilized carriers of microorganisms, due to their non-toxic, excellent mechanical strength, structural stability, and permeability, which allows the penetration and diffusion of substrates and metabolites (Zhao et al 2020). Straw with large annual output is a representative biomass material, who has micro-porous structure and large specific surface area (Xu et al 2011a(Xu et al , 2011b(Xu et al , 2011c.…”

Section: Introductionmentioning

confidence: 99%

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Enhanced degradation of phenol by a novel biomaterial through the immobilization of bacteria on cationic straw

Liang

Gong

Sun

et al. 2021

Water Science and Technology

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As phenol possesses a threat to human health, there is a great demand to search for fast and efficient methods for it to be discharged. In this study, a novel biomaterial was prepared by the immobilization of bacteria on a cationic straw carrier, and the remediation ability of the biomaterial on phenol-containing wastewater was investigated. The free bacteria could degrade 1,000 mg/L phenol within 240 h, while the prepared biomaterial was 192 h, shortening by 48 h that of free bacteria. In addition, the degradation tolerance of biomaterial increased from 1,000 mg/L to 1,200 mg/L than the free bacteria, within 216 h, which shortened by 24 h the degradation time of 1,000 mg/L phenol by free bacteria (240 h). Further, under different pH conditions, the degradation efficiency of phenol by prepared biomaterial was much higher than that of free bacteria. Especially for the lower pH 5, the degradation efficiency of biomaterial was nearly twice that of the free bacteria. This investigation demonstrates that this biomaterial has great potential in the field of remediation of organic pollution.

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“…The adsorbed chemical can be recovered from the biochar by desorption process, thereby allowing the biochar to be re‐used for successive cycles. [ 39,40 ] Alternatively, the biochar can also be used for combustion to generate energy, as a soil amendment, for carbon sequestration, and for catalytic applications. [ 35 ]…”

Section: Introductionmentioning

confidence: 99%

Removal of phenolics from aqueous pyrolysis condensate by activated biochar

et al. 2021

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Aqueous pyrolysis condensate (APC) is rich in acetic acid and has been utilized as feedstock for anaerobic digestion to produce biogas. However, various phenolic compounds dissolved in the APC act as inhibitors, negatively affecting the anaerobic digestion. In this work, we have investigated the feasibility of employing pyrolytic biochar as an adsorbent for the selective removal of phenolics from APC. Biochars derived from the pyrolysis of soft wood, rice husks, and sewage sludge and their respective activated forms have been tested as potential adsorbents for the removal of pure phenol from water solutions. The experimental results showed that, among the adsorbents studied, activated soft wood (ASW) biochar has the highest adsorption efficiency and capacity for phenol removal from water. The kinetic and isotherm studies showed that the phenol adsorption data with ASW biochar may be well described by pseudo second‐order equation and Freundlich model. Batch experiments were carried out to investigate the effects of pH, adsorbent loading, contact time, and temperature on phenolics adsorption onto ASW from APC. At optimal adsorption conditions (pH of 6.0, contact time of 30 min, adsorbent loading of 9.61 0.25em0em0emgadsorbent·gTotal phenolics−1, and temperature of 25°C), an adsorption efficiency of 96.9% ± 1.8% and a capacity of 100.78 ± 2.7 mg · g−1 were achieved. Finally, the adsorption efficiency and capacity of ASW for phenolics removal from APC was successfully compared with those of commercial activated carbon, showing comparable results, which indicated the suitability of ASW as an environmentally friendly adsorbent.

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Biochar as simultaneous shelter, adsorbent, pH buffer, and substrate of Pseudomonas citronellolis to promote biodegradation of high concentrations of phenol in wastewater

Cited by 178 publications

References 55 publications

Removal of chlortetracycline from water by immobilized Bacillus subtilis on honeysuckle residue derived biochar

Removal of chlortetracycline from water by immobilized Bacillus subtilis on honeysuckle residue derived biochar

Enhanced degradation of phenol by a novel biomaterial through the immobilization of bacteria on cationic straw

Removal of phenolics from aqueous pyrolysis condensate by activated biochar

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