Heavy metal removal effectiveness, flow direction and speciation variations in the sludge during the biosurfactant-enhanced electrokinetic remediation

Tang, Jian; He, Junguo; Tang, Hengjun; Wang, Haiyue; Sima, Weiping; Liang, Chao; Qiu, Zhongping

doi:10.1016/j.seppur.2020.116918

Cited by 47 publications

(19 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The biological treatment method was used to wastewater treatment plants in the worldwide, and it produced a large amount of sludge as by product during the wastewater treatment process. In China, the sludge production has increasing in the last decade 1,2 . The statistics data indicated that the municipal sludge production was 31.76 million tons in 2013, and it more than 50.0 million tons by 2020 2,3 .…”

Section: Introductionmentioning

confidence: 99%

“…In China, the sludge production has increasing in the last decade 1,2 . The statistics data indicated that the municipal sludge production was 31.76 million tons in 2013, and it more than 50.0 million tons by 2020 2,3 . Facing this severe situation, sludge treatment and disposal would be confronted with gigantic challenges 2 .…”

Section: Introductionmentioning

confidence: 99%

“…The statistics data indicated that the municipal sludge production was 31.76 million tons in 2013, and it more than 50.0 million tons by 2020 2,3 . Facing this severe situation, sludge treatment and disposal would be confronted with gigantic challenges 2 . However, sludge contains organic matter, nitrogen (N), phosphorus (P), potassium (K) and other nutrients, which can promote crop growth 4,5 .…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Heavy metal pollution level and potential ecological risk assessment of sludge landfill

Tang

Sima

et al. 2022

Env Prog and Sustain Energy

Self Cite

View full text Add to dashboard Cite

The level of heavy metals of the sludge in the landfills has attracted the environmental researchers due to their non-biodegradability, persistence, toxicity and biomagnification. Heavy metals contamination and ecological risk assessment in the sludge landfills were assessed. In this work, the enrichment factor (EF) and geoaccumulation index were used to analyze heavy metal pollution degree in the sludge landfills. Meanwhile, the potential ecological risk index was used to assess heavy metals potential ecological risk in the sludge landfills. Results indicated that heavy metal concentrations order was Cr > Cd > Ni > Zn > As>Cu = Pb > Hg. Cr, Cd and Ni coefficient variation were 57%, 53% and 38%, respectively, which indicated that Cr, Cd and Ni content have a large range variation. EF and geo-accumulation index analyze heavy metal pollution degree in the sludge landfills. Results demonstrated that Hg, Cd, Cu and Zn obtained a high pollution degree. However, Cr, Ni, As and Pb have a low pollution in the sludge landfills. Potential ecological risk index indicated that Hg obtained the highest pollution degree, which demonstrated that the potential ecological risk level is the highest value (E r i ≥ 3500, RI ≥ 4163). Whereas, other heavy metals have a low pollution degree in the sludge landfills. Therefore, Hg, Cd and Cu content of sludge should be strictly restricted in agricultural use. Meanwhile, it should be strictly restricted Hg, Cd and Cu content of wastewater discharge, and reduced heavy metal content of sludge.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Heavy metal pollution level and potential ecological risk assessment of sludge landfill

Tang

Sima

et al. 2022

Env Prog and Sustain Energy

Self Cite

View full text Add to dashboard Cite

show abstract

“…Numerous remediation techniques are available for remediating soil contaminated with toxic metals. They include surface capping [ 10 ], encapsulation [ 11 , 12 ], landfilling, soil flushing [ 13 ], soil washing [ 14 , 15 ], electrokinetic extraction [ 16 , 17 , 18 ], stabilisation/solidification (S/S) [ 19 , 20 , 21 ], vitrification [ 22 , 23 ], phytoremediation [ 24 , 25 ] and bioremediation. Amongst these techniques, S/S has attracted the attention of many researchers due to its low-cost application whilst preserving the long-term stability of the stabilised soil [ 26 , 27 ].…”

Section: Introductionmentioning

confidence: 99%

Oyster Shell Powder, Zeolite and Red Mud as Binders for Immobilising Toxic Metals in Fine Granular Contaminated Soils (from Industrial Zones in South Korea)

Torres-Quiroz

Dissanayake

Park

2021

IJERPH

View full text Add to dashboard Cite

Low-cost absorbent materials have elicited the attention of researchers as binders for the stabilisation/solidification technique. As, there is a no comprehensive study, the authors of this paper investigated the performance of Oyster shell powder (OS), zeolite (Z), and red mud (RM) in stabilising heavy metals in three types of heavy metal-contaminated soils by using toxicity characteristic leaching procedure (TCLP). Samples were collected from surroundings of an abandoned metal mine site and from military service zone. Furthermore, a Pb-contaminated soil was artificially prepared to evaluate each binder (100× regulatory level for Pb). OS bound approximately 82% of Pb and 78% of Cu in real cases scenario. While Z was highly effective in stabilizing Pb in highly polluted artificial soil (>50% of Pb) at lower dosages than OS and RM, it was not effective in stabilising those metals in the soils obtained from the contaminated sites. RM did not perform consistently stabilising toxic metals in soils from contaminated sites, but it demonstrated a remarkable Pb-immobilisation under dosages over than 5% in the artificial soil. Further, authors observed that OS removal efficiency reached up to 94% after 10 days. The results suggest that OS is the best low-cost adsorbent material to stabilize soils contaminated with toxic metals considered in the study.

show abstract

“…Through application of EFA technology, the efficiency of soil remediation was improved [5,6], the growth and trace metal content of aquatic plants are affected [2], and the harmful contaminants, which strictly limited the land application of the sludge, were reduced from sludge [7]. The EFA technology was also being used in drug delivery research [8].…”

Section: Introductionmentioning

confidence: 99%

Mechanism of Electric Field Assisted Screening for Candida Tropicalis

Zhang

Tan

Zhang

et al. 2021

Preprint

View full text Add to dashboard Cite

Electric field assisted technology has been widely used in many fields. Candida tropicalis degrading thiophene has been successfully screened by electric field assisted screening (EFAS). However, the mechanism of EFAS is yet unclear. In this study, the cell concentration of C. tropicalis at different locations in the electric field was studied. In the electric field, C. tropicalis cells migrate towards the cathode plate. When the loading electric field intensity was 0.6 V /cm, the concentration of cells near the cathode plate reached the maximum and it was nearly stable at 15 minutes of loading time. Analysis of the cell morphology at different locations showed that only the budding cells could migrate in the electric field. The charged characteristic of the budding cells in the electric field explained the screening mechanism of thiophene-degrading C. tropicalis by EFAS. The results can provide a theoretical foundation for EFAS in screening other biodegradable microorganisms.

show abstract

Heavy metal removal effectiveness, flow direction and speciation variations in the sludge during the biosurfactant-enhanced electrokinetic remediation

Cited by 47 publications

References 47 publications

Heavy metal pollution level and potential ecological risk assessment of sludge landfill

Heavy metal pollution level and potential ecological risk assessment of sludge landfill

Oyster Shell Powder, Zeolite and Red Mud as Binders for Immobilising Toxic Metals in Fine Granular Contaminated Soils (from Industrial Zones in South Korea)

Mechanism of Electric Field Assisted Screening for Candida Tropicalis

Contact Info

Product

Resources

About