Bioremediation of chromium and lead in wastewater from chemistry laboratories promotes by cyanobacteria

Souza, Priscila Oliveira de; Sinhor, Vanderleia; Crizel, Marcelo Guerreiro; Pires, Natanael; Filho, Pedro José Sanches; Picoloto, Rochele S.; Duarte, Fábio A.; Pereira, Cláudio M. P.; Mesko, Márcia F.

doi:10.1016/j.biteb.2022.101161

Cited by 14 publications

(5 citation statements)

References 22 publications

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“…Previous research also shows that different strains exhibit varying lethal concentrations for different HMs. 36 The resistance to As in Synechocystis can be conferred through an operon comprising a trio of genes: acr3 (slr0944), arsH (slr0945), and arsC (slr0946), all of which are under the regulatory control of ArsR. 40 …”

Section: Resultsmentioning

confidence: 99%

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Cyanoremediation of heavy metals (As(v), Cd(ii), Cr(vi), Pb(ii)) by live cyanobacteria (Anabaena variabilis, and Synechocystis sp.): an eco-sustainable technology

Hossain,

Okino

2024

RSC Adv.

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Section: Resultsmentioning

confidence: 99%

“…This phenomenon contributes to the removal of heavy metals from wastewater. 36 Optimal pH conditions were employed to facilitate the maximum growth of the cyanobacteria. Synechocystis sp.…”

Section: Hm Removal Ability Of Cyanobacteriamentioning

confidence: 99%

Cyanoremediation of heavy metals (As(v), Cd(ii), Cr(vi), Pb(ii)) by live cyanobacteria (Anabaena variabilis, and Synechocystis sp.): an eco-sustainable technology

Hossain,

Okino

2024

RSC Adv.

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“…As the only chlorophyll in cyanobacteria, chlorophyll a was an index of cyanobacteria biomass [35]. However, when the concentration of heavy metals in the environment where cyanobacteria live was high, the growth of cyanobacteria was affected and the biomass was reduced [36]. It was reported that heavy metals may affect the electron transfer reaction of the photosystem through irreversible combination with intracellular components, which led to the obstruction of the photoreaction stage and seriously impacted photosynthesis [37].…”

Section: Changes In Microbial Communitiesmentioning

confidence: 99%

Over-Produced Extracellular Polymeric Substances and Activated Antioxidant Enzymes Attribute to Resistance of Pb(II) for Algal–Bacterial Granular Sludge in Municipal Wastewater Treatment

Yang,

Zhang,

Wang

2023

Water

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Algal–bacterial granular sludge technology is a new type of wastewater treatment and resource regeneration process, which has received widespread attention due to its excellent nitrogen and phosphorus removal performance, and energy-saving and emission reduction effects. Although algal–bacterial granular sludge technology has achieved an ideal nutrient removal ability, some pol-lutants in wastewater might affect the symbiotic relationship between algae and bacteria. This study investigated the impact of coexisting Pb(II) on the symbiosis of algal–bacterial granular sludge. It was found that 2.5–10.0 mg/L of Pb(II) exposure increased the relative abundance of Pro-teobacteria. In addition, more protein in extracellular polymeric substances (EPS-PN) was secreted at 2.5 mg/L of Pb(II) exposure while EPS-PN content reduced at a rate of 5.0–10.0 mg/L of Pb(II). Under different concentrations of Pb(II), the damage degree of algal–bacterial granular sludge was exacerbated, evidenced by increased malondialdehyde (MDA) content. To cope with these adverse circumstances, the antioxidant enzyme activity of both super-oxide dismutase (SOD) and peroxidase dismutase (CAT) was boosted. With the help of these adaptive strategies, the symbiosis of algal–bacterial granular sludge was stable. Moreover, the performance of algal–bacterial granular sludge in treating COD, ammonia-N and phosphate-P was kept at above 95%. This study approved that a Pb(II) concentration less than 10.0 mg/L had little effect on the performance of algal–bacterial granular sludge in wastewater treatment. It is hoped that this study can provide useful information for an improved engineering feasibility of algal–bacterial granular sludge process.

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“…Lead-containing wastewater has always been one of the difficult problems in the field of wastewater treatment. Commonly used treatment methods include chemical precipitation (Kumar et al, 2021), adsorption (Ravishankar et al, 2019), membrane separation (Kharraz et al, 2022), ion exchange (Pranudta et al, 2021) and bioremediation (Oliveira et al, 2022). The wastewater treatment process will produce sediments and floating objects, which contain Pb 2+ and pathogenic microorganisms, which are difficult to treat and easily cause secondary environmental pollution (Kharraz et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Efficient solidification of Pb2+ by activated tungsten tailings and cement

Cheng¹,

Kuang²,

Zhu³

et al. 2023

Physicochem. Probl. Miner. Process.

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The preparation of cementing admixture from tailings and co-solidification of Pb2+ with cement is a green way to realize the resource utilization of tailings and treatment of the lead-containing wastewater. In this paper, the tungsten tailings were activated in different ways, and the mechanical properties of the tungsten tailings-cement solidified body with different activation systems and the solidification behavior of Pb2+ were studied. The phase and microstructure of the hydrated product were characterized by XRD, FT-IR, SEM and EDS. The results showed that the curing effect of Pb2+ was obviously different of different activation systems, and the curing effect of the solidified body of the ternary composite activation system (TCAS) was the best, second only to the pure cement system (PCS). Different activation methods have a significant impact on the mechanical properties of the solidified body. With the increase of the Pb2+ content, the compressive strength of the solidified body gradually decreased, the Pb2+ leaching concentration gradually increased; with the extension of the curing age, the compressive strength gradually increased, and the Pb2+ leaching concentration gradually decreased. In particular, the compressive strength of the 28d solidified body was 31.43 MPa and the leaching concentration of Pb2+ was only 0.38 mg/L when the Pb2+ content was 5%. The phase, microstructure and EDS results of the hydration products showed that Pb2+ was mainly solidified in the C-S-H gel.

show abstract

Bioremediation of chromium and lead in wastewater from chemistry laboratories promotes by cyanobacteria

Cited by 14 publications

References 22 publications

Cyanoremediation of heavy metals (As(v), Cd(ii), Cr(vi), Pb(ii)) by live cyanobacteria (Anabaena variabilis, and Synechocystis sp.): an eco-sustainable technology

Cyanoremediation of heavy metals (As(v), Cd(ii), Cr(vi), Pb(ii)) by live cyanobacteria (Anabaena variabilis, and Synechocystis sp.): an eco-sustainable technology

Over-Produced Extracellular Polymeric Substances and Activated Antioxidant Enzymes Attribute to Resistance of Pb(II) for Algal–Bacterial Granular Sludge in Municipal Wastewater Treatment

Efficient solidification of Pb<sup>2+</sup> by activated tungsten tailings and cement

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