Purification mechanism of city tail water by constructed wetland substrate with NaOH-modified corn straw biochar

Wang, Hanxi; Wang, Xinyu; Teng, Haowen; Xu, Jianling; Sheng, Lianxi

doi:10.1016/j.ecoenv.2022.113597

Cited by 21 publications

(2 citation statements)

References 68 publications

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“…which may be due to the loading of OHon the carbon surface of ZMFBC after NaOH elution adsorption, thus reducing the Cr 6+ adsorption performance(Choudhary et al 2020, Wang et al 2022b). …”

mentioning

confidence: 99%

Adsorption of anionic and cationic heavy metals by Zn-Mn-Fe oxide-loaded biochar: Performance and mechanism

Fu,

Zhang,

et al. 2023

Preprint

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Biochar has a good heavy metal adsorption capacity, but it is difficult to separate the heavy metals from the biochar for reuse after application in wastewater treatment processes. To solve this problem, Zn-Mn-Fe oxide-loaded biochar (ZMFBC) was prepared in this study to fabricate magnetic biochar, and cationic heavy metals (Pb2+, Cd2+) and anionic heavy metals (Cr6+) were selected as target pollutants for removal. The ZMFBC adsorption performance and physicochemical properties were evaluated by combining batch experiments and characterization techniques. The results showed that the Pb2+, Cd2+ and Cr6+ maximum adsorption amounts obtained by ZMFBC were 136.99, 74.63 and 39.06 mg/g, respectively, and the adsorption processes were in accordance with pseudo-second order and the Langmuir model. Functional group could be the main reason for the high adsorption capacity of ZMFBC. With good heavy metal removal performance and easy separation, ZMFBC can be used in a variety of applications where adsorbents are needed to remove contaminants.

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“…which may be due to the loading of OHon the carbon surface of ZMFBC after NaOH elution adsorption, thus reducing the Cr 6+ adsorption performance(Choudhary et al 2020, Wang et al 2022b). …”

mentioning

confidence: 99%

Adsorption of anionic and cationic heavy metals by Zn-Mn-Fe oxide-loaded biochar: Performance and mechanism

Fu,

Zhang,

et al. 2023

Preprint

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“…9 t(Wang et al 2022), with rice straw and corncobs accounting for 32.3% and 45.0%, respectively(Li et al 2020). If these can be fully utilized, it will signi cantly reduce the cost of CWs operations; Tao et al (2020) reported that corncobs can provide a su cient carbon source for denitri cation;Sun et al (2019) reported that the addition of rice straw could increase the abundance of denitrifying bacteria.…”

mentioning

confidence: 99%

Application of alkali-heated corncobs enhanced nitrogen removal and microbial diversity in constructed wetlands for treating low C/N ratio wastewater

Liang,

Hao,

et al. 2023

Environ Sci Pollut Res

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Lack of carbon source is the main factor limiting denitri cation of low C/N ratio wastewater in constructed wetlands (CWs). Agricultural waste has been considered as a supplementary carbon source but research is still limited. To solve this problem, ferric carbon (Fe-C) + zeolite, Fe-C + gravel and gravel were used as substrates to build CWs in this experiment, aiming to investigate the effects of different carbon sources (rice straw, corncobs, alkali-heated corncobs) on nitrogen removal performance and microbial community structure in CWs for low C/N wastewater. The results demonstrated that the microbial community and e uent nitrogen concentration of CWs were mainly in uenced by the carbon source rather than the substrate. Alkali-heated corncobs signi cantly enhanced the removal of NO 2 − -N, NH 4 + -N, NO 3 − -N and TN. Carbon sources addition increased microbial diversity. Alkali-heated corncobs addition signi cantly increased the abundance of heterotrophic denitrifying bacteria (Proteobacteria and Bacteroidota). Furthermore, alkali-heated corncobs addition increased the copy number of nirS, nosZ and nirK genes while greenhouse gas uxes were lower than common corncobs. In summary, alkali-heated corncobs can be considered as an effective carbon source.

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Degradation of 2,4-DCP by immobilized laccase on modified biochar carrier

Xie,

Ren,

et al. 2023

Bioprocess Biosyst Eng

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Purification mechanism of city tail water by constructed wetland substrate with NaOH-modified corn straw biochar

Cited by 21 publications

References 68 publications

Adsorption of anionic and cationic heavy metals by Zn-Mn-Fe oxide-loaded biochar: Performance and mechanism

Adsorption of anionic and cationic heavy metals by Zn-Mn-Fe oxide-loaded biochar: Performance and mechanism

Application of alkali-heated corncobs enhanced nitrogen removal and microbial diversity in constructed wetlands for treating low C/N ratio wastewater

Degradation of 2,4-DCP by immobilized laccase on modified biochar carrier

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