Heavy metal removal from sludge with organic chelators: Comparative study of N, N-bis(carboxymethyl) glutamic acid and citric acid

Suanon, Fidèle; Sun, Qian; Dimon, Biaou; Mama, Daouda; Yu, Chang-Ping

doi:10.1016/j.jenvman.2015.10.035

Cited by 120 publications

(62 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Regarding the elements with great environmental concerns such as As, Cd, Co, Cr, Cu, Ni, Pb, and Zn, the concentrations ranged from 3.9–5.2 mg kg −1 DS, 9.1–61.4 mg kg −1 DS, 5.46–48.7 mg kg −1 DS, 36.2–1600.0 mg kg −1 DS, 64.8–1390.0 mg kg −1 DS, 14.9–610.0 mg kg −1 DS, 42.8–63.4 mg kg −1 DS, and 231–2230 mg kg −1 DS, respectively. The concentrations of the major industrial elements were within the similar ranges described in the studies of the domestic sewage sludge in the US 17 and China 20, 22 .…”

Section: Resultssupporting

confidence: 74%

“…The wastewater was nearly 100% domestic wastewater in W1, while W2 and W3 contained 20% and >50% industrial wastewater besides domestic wastewater, respectively. Consequently, the sludge from W3 showed higher concentration of most of the metals, as they are mainly used in the manufacturing and industrial processes 17, 20–22, 34 . In addition, as previously stated, the treatment processes in the WWTPs also vary from one WWTP to another.…”

Section: Resultsmentioning

confidence: 99%

“…In addition, Suanon et al . 22, 23 reported concentration of 64, 73.1, 604.1, 1102.1, 483.9, and 2060.3 mg kg −1 DS for Cd, Co, Cu, Cr, Ni and Zn, respectively, in the urban sewage sludge. As it can be noticed that most of the studies investigated a limited number of metals, which are generally with greater environmental concerns, and they are frequently listed in the environmental monitoring methods, standards, or regulations 24, 25 .…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Assessment of the occurrence, spatiotemporal variations and geoaccumulation of fifty-two inorganic elements in sewage sludge: A sludge management revisit

Suanon

Sun

Yang

et al. 2017

Sci Rep

Self Cite

View full text Add to dashboard Cite

The limited information about the sludge quality has made its management a top environmental challenge. In the present study, occurrence and the spatiotemporal variations of 52 inorganic elements were investigated in the sludge samples from three wastewater treatment plants (WWTPs) in Xiamen city, China. The results showed, the occurrence of 49 elements with the concentrations in the range of >125–53500 mg kg−1 dry sludge (DS) for commonly used industrial metals, 1.22–14.0 mg kg−1 DS for precious metals, and 1.12–439.0 mg kg−1 DS for rare earth elements. The geo-accumulation studies indicated a moderate to high levels of buildup of some elements in the sewage sludge. Principal components analysis (PCA) indicated strong spatial and weak temporal variations in the concentrations of the elements. Therefore, the sludge disposal operations, based on the element concentrations, geoaccumulation and economic potential are suggested for each WWTP. Sludge from W1 and W2 were found suitable for agricultural usage, while that from W3 showed a higher economic potential for the recovery of precious metals. This study concludes that a comprehensive analysis of the elements in the sewage sludge could provide critical information for the disposal and management of the sludge.

show abstract

Section: Resultssupporting

confidence: 74%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Assessment of the occurrence, spatiotemporal variations and geoaccumulation of fifty-two inorganic elements in sewage sludge: A sludge management revisit

Suanon

Sun

Yang

et al. 2017

Sci Rep

Self Cite

View full text Add to dashboard Cite

show abstract

“…Studies conducted by Kołodyńska (2013) and van Ginkel and Geerts (2016) have demonstrated that N 80% of ISA and 60% of GLDA were degraded within 28 days. Moreover, the alternative chelators are characterized by low potential toxicity (Pinto et al, 2014) and a powerful ability to develop soluble complexes with polyvalent ions over an extensive pH range (Lingua et al, 2014;Suanon et al, 2016;Fu et al, 2017); therefore they may comprise another environmentally-friendly alternative next to EDDS for substitution of persistent EDTA.…”

Section: Introductionmentioning

confidence: 99%

Effect of soil washing with biodegradable chelators on the toxicity of residual metals and soil biological properties

Wang

Zhang

Zhong

et al. 2018

Science of The Total Environment

108

View full text Add to dashboard Cite

Soil washing with chelators is a promising and efficient method of remediating metals-contaminated soils. However, the toxicity of residual metals and the effects on soil microbial properties have remained largely unknown after washing. In this study, we employed four biodegradable chelators for removal of metals from contaminated soils: iminodisuccinic acid (ISA), glutamate-N,N-diacetic acid (GLDA), glucomonocarbonic acid (GCA), and polyaspartic acid (PASP). The maximum removal efficiencies for Cd, Pb, and Zn of 85, 55, and 64% and 45, 53, and 32% were achieved from farmland soil and mine soil using biodegradable chelators, respectively. It was found that the capacity of ISA and GLDA to reduce the labile fraction of Cd, Pb, and Zn was similar to that of the conventional non-biodegradable chelator ethylenediaminetetraacetic acid (EDTA). The leachability, mobility, and bioaccessibility of residual metals after washing decreased notably in comparison to the original soils, thus mitigating the estimated environmental and human health risks. Soil β-glucosidase activity, urease activity, acid phosphatase activity, microbial biomass nitrogen, and microbial biomass phosphorus decreased in the treated soils. However, compared with EDTA treatment, soil enzyme activities distinctly increased by 5-94% and overall microbial biomass slightly improved in the remediated soils, which would facilitate reuse of the washed soils. Based on soil toxicity tests that employed wheat seed germination as the endpoint of assessment, the washed soils exhibited only slight effects especially after ISA and GLDA treatments, following high-efficiency metal removal. Hence, ISA and GLDA appear to possess the greatest potential to rehabilitate polluted soils with limited toxicity remaining.

show abstract

“…[19] Moreover, new insights from simulation studies of functionalized graphene and boron nitride nanosheets for removal of Zn 2+ from aqueous solution have been obtained. [20] In one of the newest reports, paper, a readily available renewable resource, has been functionalized to develop interesting low-cost adsorbent material for water purification.…”

Section: Introductionmentioning

confidence: 99%

Novel salep-based chelating hydrogel for heavy metal removal from aqueous solutions

Soleyman

Pourjavadi

Monfared

et al. 2016

Polym. Adv. Technol.

View full text Add to dashboard Cite

A novel optimized chelating hydrogel was synthesized via graft copolymerization of acrylamide and 2-hydroxyethyl methacrylate (as two-dentate chelating co-monomer) onto salep (a multicomponent polysaccharide obtained from dried tubers of certain natural terrestrial orchids) using N,N′-methylenebisacrylamide as a crosslinker and ammonium persulfate as an initiator. Reaction parameters (N,N′-methylenebisacrylamide and ammonium persulfate amounts as well as acrylamide/2-hydroxyethyl methacrylate weight ratio) affecting the water absorption of the chelating hydrogel were optimized using a systematic method to achieve a hydrogel with high swelling capacity as possible. Heavy metal ion adsorption capacity of the optimized hydrogel for metal ions [Cu (II), Pb (II), Cd (II), and Cr (III)] were investigated in aqueous media containing different concentrations of these ions (5-50 ppm). The results showed that the hydrogel have great potential for heavy metal removal from aqueous solutions. The hydrogel formation was confirmed by Fourier transform infrared spectroscopy, and surface morphology study of the hydrogel was performed by scanning electron microscope.

show abstract

Heavy metal removal from sludge with organic chelators: Comparative study of N, N-bis(carboxymethyl) glutamic acid and citric acid

Cited by 120 publications

References 26 publications

Assessment of the occurrence, spatiotemporal variations and geoaccumulation of fifty-two inorganic elements in sewage sludge: A sludge management revisit

Assessment of the occurrence, spatiotemporal variations and geoaccumulation of fifty-two inorganic elements in sewage sludge: A sludge management revisit

Effect of soil washing with biodegradable chelators on the toxicity of residual metals and soil biological properties

Novel salep-based chelating hydrogel for heavy metal removal from aqueous solutions

Contact Info

Product

Resources

About