Remediating thiacloprid-contaminated soil utilizing straw biochar-loaded iron and manganese oxides activated persulfate: Removal effects and soil environment changes

Li, Jie; Guo, Zhi; Cui, Kangping; Chen, Xing; Yang, Xue; Dong, Dazhuang; Xi, Shanshan; Wu, Zhangzhen; Wu, Feiyan

doi:10.1016/j.jhazmat.2023.132066

Cited by 4 publications

(2 citation statements)

References 65 publications

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“…So far, research on the utilization of crops residues has been focused on raw materials for the paper industry, burying them back to improve the fertility of the soil, production of protein feed, alcohol and methane by microbial fermentation [14], and preparation of biochars [15][16][17][18] and superabsorbents [19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, swelling and water-retention behaviors of phytic acid-modified corn stalk-composite superabsorbents

Liu,

Wan,

et al. 2024

J Polym Res

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A novel phytic acid-modified corn stalk-composite superabsorbent (PACS-gp(AA-AM-VP)) with water absorbency of 391g/g, water retention around 30% at 200min under 90℃, adsorption capacities of 284mg/g and 448 mg/g for Ni(II) and Cu (II), respectively, was synthesized by graft copolymerization of acrylamide(AM), vinyl pyrrolidone(VP) and itaconic acid(IA) with phytic acidmodified corn stalk (PACS) in aqueous solution, using N,Nmethylenebisacrylamide (MBA) as a crosslinker and ammonium persulfate(APS) and sodium bisulfite(SBS) as redox initiator. Factors influencing water absorbency and water retention of PACS-g-p(AA-AM-VP), such as PACS amount, initiator amount, crosslinker amount, neutralization degree of IA, IA/VP mass ratio and IA/AM mass ratio, were investigated. Morphologies and structure of PACS-g-p(AA-AM-VP) were characterized by FTIR and SEM. FTIR spectra indicate the structure of phytic acid-modified corn stalk graft-copolymer. SEM data shows that fiber structure of corn stalk is partially destroyed after phytic acid modification under ultrasonic wave. PACS-g-p(AA-AM-VP) has a coarse, fluffy and porous structure, facilitating the permeation of water and heavy metal ions into the polymeric network. Given these properties, PACS-g-p(AA-AM-VP) can be extensively applied in agriculture and horticulture as a water-retaining and soil remediation material which increases agricultural irrigation efficiency and remediates heavy metal-contaminated soil due to its low cost, environmental friendliness, high water retention and good adsorption for heavy metal ions. Keywords：superabsorbent; polymerization; corn stalk; phytic acid; composite Effect of PACS amount on water absorbency and water retention of PACS-g-P(AA-AM-VP)Effects of PACS amount on the water absorbency and water retention of PACS-g-P(AA-AM-VP) were depicted in Figure 4. Obviously, with increase of PACS amount up to 10%, both water absorbency and water retention of PACS-g-P(AA-AM-VP) increased first, and then decreases.

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Section: Introductionmentioning

confidence: 99%

Synthesis, swelling and water-retention behaviors of phytic acid-modified corn stalk-composite superabsorbents

Liu,

Wan,

et al. 2024

J Polym Res

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show abstract

Section: Introductionmentioning

confidence: 99%

Synthesis, swelling and water-retention behaviors of phytic acid-modified corn stalk-composite superabsorbents

Liu,

Wan,

et al. 2023

Preprint

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A novel phytic acid-modified corn stalk-composite superabsorbent (PACS-g-p(AA-AM-VP)) with water absorbency of 391g/g, water retention around 30% at 200min under 90°C, adsorption capacities of 284mg/g and 448 mg/g for Ni(II) and Cu (II), respectively, was synthesized by graft copolymerization of acrylamide(AM), vinyl pyrrolidone(VP) and itaconic acid(IA) with phytic acid-modified corn stalk (PACS) in aqueous solution, using N,N-methylenebisacrylamide (MBA) as a crosslinker and ammonium persulfate(APS) and sodium bisulfite(SBS) as redox initiator. Factors influencing water absorbency and water retention of PACS-g-p(AA-AM-VP), such as PACS amount, initiator amount, crosslinker amount, neutralization degree of IA, IA/VP mass ratio and IA/AM mass ratio, were investigated. Morphologies and structure of PACS-g-p(AA-AM-VP) were characterized by FTIR and SEM. FTIR spectra indicate the structure of phytic acid-modified corn stalk graft-copolymer. SEM data shows that fiber structure of corn stalk is partially destroyed after phytic acid modification under ultrasonic wave. PACS-g-p(AA-AM-VP) has a coarse, fluffy and porous structure, facilitating the permeation of water and heavy metal ions into the polymeric network. Given these properties, PACS-g-p(AA-AM-VP) can be extensively applied in agriculture and horticulture as a water-retaining and soil remediation material which increases agricultural irrigation efficiency and remediates heavy metal-contaminated soil due to its low cost, environmental friendliness, high water retention and good adsorption for heavy metal ions.

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Roles of iron and manganese in bimetallic biochar composites for efficient persulfate activation and atrazine removal

Liang,

Tao,

Zhao

et al. 2024

Biochar

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As for Atrazine (C8H14ClN5) degradation in soil, iron (Fe)-manganese (Mn) bimetallic biochar composites were proved to be more efficient for persulfate (PS) activation than monometallic ones. The atrazine removal rates of Fe/Mn loaded biochar + PS systems were 2.17–2.89 times higher than Fe/Mn loaded biochar alone. Compared with monometallic biochar, the higher atrazine removal rates by bimetallic biochar (77.2–96.7%) were mainly attributed to the synergy degradation and adsorption due to the larger amounts of metal oxides on the biochar surface. Atrazine degradation in Fe-rich biochar systems was mainly attributed to free radicals (i.e., $${\text{SO}}_{4}^{ \cdot - }$$ SO 4 · - and ·OH) through oxidative routes, whereas surface-bound radicals, 1O2, and free radicals were responsible for the degradation of atrazine in Mn-rich biochar systems. Furthermore, with a higher ratio of Fe(II) and Mn(III) formed in Fe-rich bimetallic biochar, the valence state exchange between Fe and Mn contributed significantly to the more effective activation of PS and the generation of more free radicals. The pathways of atrazine degradation in the Fe-rich bimetallic biochar systems involved alkyl hydroxylation, alkyl oxidation, dealkylation, and dechlorohydroxylation. The results indicated that bimetallic biochar composites with more Fe and less Mn are more effective for the PS-based degradation of atrazine, which guides the ration design of easily available carbon materials targeted for the efficient remediation of various organic-polluted soil. Graphical Abstract

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Remediating thiacloprid-contaminated soil utilizing straw biochar-loaded iron and manganese oxides activated persulfate: Removal effects and soil environment changes

Cited by 4 publications

References 65 publications

Synthesis, swelling and water-retention behaviors of phytic acid-modified corn stalk-composite superabsorbents

Synthesis, swelling and water-retention behaviors of phytic acid-modified corn stalk-composite superabsorbents

Synthesis, swelling and water-retention behaviors of phytic acid-modified corn stalk-composite superabsorbents

Roles of iron and manganese in bimetallic biochar composites for efficient persulfate activation and atrazine removal

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