Preparation of a novel sludge-derived biochar by K2FeO4 conditioning to enhance the removal of Pb2+

Wang, Junsen; Wang, Tianrun; Zhu, Qinyun; Zhang, Shike; Shi, Qi; Chovelon, Jean‐Marc; Wang, Hong-Tao

doi:10.1016/j.colcom.2021.100417

Cited by 14 publications

(7 citation statements)

References 41 publications

(39 reference statements)

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“…However, the heavy-metal-adsorption capacity of sludge-based biochar is unsatisfactory, which limits its promotion and application to a certain extent [42, 43]. Some modifiers such as Fe 3 O 4 [44], nanostructured CaCO 3 [45], trithiocyanuric acid trisodium salt [46], α -Fe 2 O 3 and α -FeOOH [47], K 2 FeO 4 [48], and hydroxyapatite [42] have been successfully applied to prepare modified sewage sludge biochar, and satisfactory heavy-metal-adsorption capacity has been achieved. At present, chemical modification is a noteworthy research direction for improving the adsorption capacity of heavy metals by sewage sludge biochar [45, 49].…”

Section: Introductionmentioning

confidence: 99%

Na₄P₂O₇-Modified Biochar Derived from Sewage Sludge: Effective Cu(II)-Adsorption Removal from Aqueous Solution

Fan

Wang

Miao

et al. 2023

Adsorption Science & Technology

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With the rapid development of industrialization, the amount of copper-containing wastewater is increasing, thereby posing a threat to the aquatic ecological environment and human health. Sludge biochar has received extensive concern in recent years due to its advantages of low cost and sustainability for the treatment of heavy-metal-containing wastewater. However, the heavy-metal-adsorption capacity of sludge biochar is limited. This study prepared a sodium pyrophosphate- (Na4P2O7-) modified municipal sludge-based biochar (SP-SBC) and evaluated its adsorption performance for Cu(II). Results showed that SP-SBC had higher yield, ash content, pH, Na and P content, and surface roughness than original sewage sludge biochar (SBC). The Cu(II)-adsorption capacity of SP-SBC was 4.55 times than that of SBC at room temperature. For Cu(II) adsorption by SP-SBC, the kinetics and isotherms conformed to the pseudo-second-order model and the Langmuir–Freundlich model, respectively. The maximum adsorption capacity of SP-SBC was 38.49 mg·g−1 at 35°C. Cu(II) adsorption by SP-SBC primarily involved ion exchange, electrostatic attraction, and precipitation. The desired adsorption performance for Cu(II) in the fixed-bed column experiment indicated that SP-SBC can be reused and had good application potential to treat copper-containing wastewater. Overall, this study provided a desirable sorbent (SP-SBC) for Cu(II) removal, as well as a new simple chemical-modification method for SBC to enhance Cu(II)-adsorption capacity.

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Section: Introductionmentioning

confidence: 99%

Na₄P₂O₇-Modified Biochar Derived from Sewage Sludge: Effective Cu(II)-Adsorption Removal from Aqueous Solution

Fan

Wang

Miao

et al. 2023

Adsorption Science & Technology

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“…For the modified biochars mentioned above, almost all studies found that modified biochar has a faster adsorption process when used for AMD treatment. Ahmed et al (2021), Wang et al (2021a) and Yin et al (2022) confirmed that the modified biochar could reach the adsorption equilibrium within 1 h, while conventional biochar may need 2-12 h. The rapid adsorption process is caused by the number of pore channels and functional groups on the modified biochar that is sufficient to provide active sites (Yin et al, 2022).…”

Section: Novel Developments Of Biochar For Amd Treatmentmentioning

confidence: 81%

“…In addition, Wang et al (2021a) investigated Pb removal by K 2 FeO 4 modified sludge biochar. The adsorption capacity of K 2 FeO 4 modified biochar was found to be six times higher than the original biochar due to much more numbers of functional groups on the modified biochar.…”

Section: Novel Developments Of Biochar For Amd Treatmentmentioning

confidence: 99%

“…However, some modified biochar is not affected by extreme low pH and can reach the maximum adsorption. For example, Wang et al (2021a) mentioned that K 2 FeO 4 modified sludge biochar could reach the maximum Pb adsorption capacity at pH 2. Yang et al (2021b) also reported nanoscale biochar could achieve the maximum adsorption of Cr at pH 2.…”

Section: Novel Developments Of Biochar For Amd Treatmentmentioning

confidence: 99%

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Algae, biochar and bacteria for acid mine drainage (AMD) remediation: A review

Bogush

Mašek

et al. 2022

Chemosphere

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“…For example, magnetic biochar prepared by pyrolysis of pomelo peel and ferrate can improve the adsorption performance of biochar 31 . Ferrate could significantly remove As 3+ under the influence of straw biochar, the ferrate/biochar system achieved a removal rate of more than 91% for arsenic 32 . In addition, the treatment of sludge biochar by K 2 FeO 4 can enhance the abundance of functional groups of sludge biochar and improve the removal effect of Pb 2+ 32 .…”

Section: Introductionmentioning

confidence: 97%

Study on improvement of copper sulfide acid soil properties and mechanism of metal ion fixation based on Fe-biochar composite

Zhang,

Xue,

Han

et al. 2024

Sci Rep

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In this study, Fe modification of bamboo biochar (BC) with ferrate was used to construct a composite soil amendment based on K2FeO4-biochar (Fe-BC) system. Based on soil culture experiments, Fe-BC combined with organic–inorganic materials at the application levels of 3%, 5% and 10% to copper sulfide contaminated acid soil was studied. Adsorption kinetics experiment was used to investigate the adsorption capacity of Fe-modified biochar to heavy metal Cu. The results showed that the pH value of bamboo biochar could be increased by 1.12 units after K2FeO4 modification. Compared with the BC, the adsorption capacity of Cu2+ increased from 190.48 to 276.12 mg/g, which was mainly reflected in single-layer surface adsorption and chemisorption. Pore diffusion, electrostatic interaction and surface interaction are the possible mechanisms of Fe-BC interaction with Cu2+ ions. And the contents of Pb, Cu and Zn in soil leaching state decreased by 59.20%, 65.88% and 57.88%, respectively, at the 10% application level of Fe-BC. In general, the composite modifier based on ferrate and biochar has a positive effect on improving the characteristics of acidic soil in copper mining area.

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Preparation of a novel sludge-derived biochar by K2FeO4 conditioning to enhance the removal of Pb2+

Cited by 14 publications

References 41 publications

Na₄P₂O₇-Modified Biochar Derived from Sewage Sludge: Effective Cu(II)-Adsorption Removal from Aqueous Solution

Na₄P₂O₇-Modified Biochar Derived from Sewage Sludge: Effective Cu(II)-Adsorption Removal from Aqueous Solution

Algae, biochar and bacteria for acid mine drainage (AMD) remediation: A review

Study on improvement of copper sulfide acid soil properties and mechanism of metal ion fixation based on Fe-biochar composite

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Preparation of a novel sludge-derived biochar by K2FeO4 conditioning to enhance the removal of Pb2+

Cited by 14 publications

References 41 publications

Na4P2O7-Modified Biochar Derived from Sewage Sludge: Effective Cu(II)-Adsorption Removal from Aqueous Solution

Na4P2O7-Modified Biochar Derived from Sewage Sludge: Effective Cu(II)-Adsorption Removal from Aqueous Solution

Algae, biochar and bacteria for acid mine drainage (AMD) remediation: A review

Study on improvement of copper sulfide acid soil properties and mechanism of metal ion fixation based on Fe-biochar composite

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Na₄P₂O₇-Modified Biochar Derived from Sewage Sludge: Effective Cu(II)-Adsorption Removal from Aqueous Solution

Na₄P₂O₇-Modified Biochar Derived from Sewage Sludge: Effective Cu(II)-Adsorption Removal from Aqueous Solution