Layer-by-layer strategy for adsorption capacity fattening of endophytic bacterial biomass for highly effective removal of heavy metals

Luo, Shenglian; Li, Xiaojie; Chen, Liang; Chen, Jueliang; Wan, Yong; Liu, Chengbin

doi:10.1016/j.cej.2013.11.029

Cited by 86 publications

(24 citation statements)

References 49 publications

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“…An absorption band around 3375.64 cm − 1 corresponding to O-H or N-H groups is shifted to 3326.37 cm −1 after adsorption of Pb 2+ and 3232.51 after adsorption of Zn 2+ , which may be ascribed to the complexion of OH and amide groups with metals ions [37][38][39][40]. The peaks at 1615.9 cm − 1 , 1631 cm − 1 and 1649.89 cm − 1 may be attributed to C_O stretching vibration [40][41][42][43][44]. The peak at 1401.3 cm −1 , 1376.97 cm −1 and 1416.68 cm −1 in the spectrum show C-N groups.…”

Section: Characterization Of the Adsorbentmentioning

confidence: 90%

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Removal of zinc and lead from aqueous solution by nanostructured cedar leaf ash as biosorbent

Hafshejani

Nasab

Gholami

et al. 2015

Journal of Molecular Liquids

110

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Section: Characterization Of the Adsorbentmentioning

confidence: 90%

“…and 1117.78 cm −1 . Peaks in the range of 1000-1200 cm −1 should correspond to C-O stretching [42,43,45]. The changes appear in absorption bands in FTIR after adsorption indicates that some functional groups are involved in the sorption process, due to which either they (bands) shift or disappear.…”

Section: Characterization Of the Adsorbentmentioning

confidence: 98%

Removal of zinc and lead from aqueous solution by nanostructured cedar leaf ash as biosorbent

Hafshejani

Nasab

Gholami

et al. 2015

Journal of Molecular Liquids

110

View full text Add to dashboard Cite

“…Different adsorbents have diverse mechanisms in the process of adsorbing heavy metals, such as electrostatic interaction, ion exchange, and chelation [29]. It has been proved that amino groups particularly primary amino groups have high complexing capacities with various of heavy metals such as Pb(II) and Cd(II) due to the lone pair electrons on the N atoms [16,30].…”

Section: Adsorption Mechanismmentioning

confidence: 99%

A double network gel as low cost and easy recycle adsorbent: Highly efficient removal of Cd(II) and Pb(II) pollutants from wastewater

Chu

Liu

Zhou

et al. 2015

Journal of Hazardous Materials

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148

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“…Meanwhile, in the high-resolution XPS spectrum of O1s (Fig. 5d), there is no new peak observed after the Cd(II) adsorption, demonstrating that the interaction mechanism between O and Cd is not complexation as between N and Cd, but the ion exchange between eCOOH and Cd(II) (Luo et al, 2014a). Thus, the removal of Cd(II) by the polyampholyte hydrogel is not a single process, mainly controlled by the complexation between eNH 2 and Cd(II) and the ion exchange between eCOOH and Cd(II).…”

Section: Adsorption Mechanismmentioning

confidence: 99%

A highly efficient polyampholyte hydrogel sorbent based fixed-bed process for heavy metal removal in actual industrial effluent

et al. 2016

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a b s t r a c tHigh sorption capacity, high sorption rate, and fast separation and regeneration for qualified sorbents used in removing heavy metals from wastewater are urgently needed. In this study, a polyampholyte hydrogel was well designed and prepared via a simple radical polymerization procedure. Due to the remarkable mechanical strength, the three-dimensional polyampholyte hydrogel could be fast separated, easily regenerated and highly reused. The sorption capacities were as high as 216.1 mg/g for Pb(II) and 153.8 mg/g for Cd(II) owing to the existence of the large number of active groups. The adsorption could be conducted in a wide pH range of 3e6 and the equilibrium fast reached in 30 min due to its excellent water penetration for highly accessible to metal ions. The fixed-bed column sorption results indicated that the polyampholyte hydrogel was particularly effective in removing Pb(II) and Cd(II) from actual industrial effluent to meet the regulatory requirements. The treatment volumes of actual smelting effluent using one fixed bed column were as high as 684 bed volumes (BV) (7736 mL) for Pb(II) and 200 BV (2262 mL) for Cd(II). Furthermore, the treatment volumes of actual smelting effluent using tandem three columns reached 924 BV (31,351 mL) for Pb(II) and 250 BV (8483 mL) for Cd(II), producing only 4 BV (136 mL) eluent. Compared with the traditional high density slurry (HDS) process with large amount of sludge, the proposed process would be expected to produce only a small amount of sludge. When the treatment volume was controlled below 209.3 BV (7103 mL), all metal ions in the actual industrial effluent could be effectively removed (<0.01 mg/L). This wok develops a highly practical process based on polyampholyte hydrogel sorbents for the removal of heavy metal ions from practical wastewater.

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Layer-by-layer strategy for adsorption capacity fattening of endophytic bacterial biomass for highly effective removal of heavy metals

Cited by 86 publications

References 49 publications

Removal of zinc and lead from aqueous solution by nanostructured cedar leaf ash as biosorbent

Removal of zinc and lead from aqueous solution by nanostructured cedar leaf ash as biosorbent

A double network gel as low cost and easy recycle adsorbent: Highly efficient removal of Cd(II) and Pb(II) pollutants from wastewater

A highly efficient polyampholyte hydrogel sorbent based fixed-bed process for heavy metal removal in actual industrial effluent

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