Removal of heavy metals from simulated wastewater by in situ formation of layered double hydroxides

Peligro, Francisco R.; Pavlović, I.; Rojas, Ricardo; Barriga, C.

doi:10.1016/j.cej.2016.08.054

Cited by 150 publications

(29 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The United States Environmental Protection Agency (EPA) and the United States Geological Survey (USGS) examined treated and untreated water samples from approximately 25 different water treatment plants and reported~250 microbiological and chemical contaminants [2]. A wide range of technologies is used for wastewater treatment, including biological treatment, chemical precipitation, phytoremediation, membrane removal, and ion exchange [3][4][5]. However, these treatments require significant operating, maintenance, and energy costs, and do not always show a sufficient removal of Pine woodchip Jarrah Activated carbon [19] laboratory Cu and Zn removal 7.79 9.43 9.93…”

Section: Introductionmentioning

confidence: 99%

The-Proof-of-Concept of Biochar Floating Cover Influence on Water pH

Meiirkhanuly

Kozieł

Białowiec

et al. 2019

Water

View full text Add to dashboard Cite

Studies have shown that biochar has the potential to remove organic and inorganic contaminants from wastewater. pH is known to have a crucial role in the transformation of pollutants. In this research, we explore the feasibility of using biochars properties to control the pH near the water-air interface, so the gaseous emissions from water (or wastewater) could be mitigated. This study aimed to test the effects of a thin layer biochar addition on the spatial and temporal variation of water pH. Two types of biochar and water were tested. Highly alkaline porous (HAP; pH 9.2) biochars made of corn stover and red oak (RO; pH 7.5) were applied surficially to tap (pH 9.5) and deionized water (DI) (pH 5.4). The spatial pH of solutions was measured every 1 mm of depth on days 0, 2, and 4 after biochar application. The results showed that HAP biochar increased the pH of both tap and DI water, while RO decreased tap water pH and increased DI water pH. On day 0, there was no effect on tap water pH, while a pH change in DI water was observed due to its lower buffer capacity. In addition, the pH (temporal) migration from topically applied biochar into an aqueous solution was visualized using a colorimetric pH indicator and corn starch to increase viscosity (to prevent biochars from sinking). The results prove that the surficial application of biochar to water was able to change both the pH near the water-air interface and the pH of the solution with time. The pH change was dependent on the biochar pH and water buffer capacity. These results warrant further research into the floatability of biochars and into designing biochars with specific pH, which could be a factor influencing gaseous emissions from liquids that are sensitive to pH.

show abstract

Section: Introductionmentioning

confidence: 99%

The-Proof-of-Concept of Biochar Floating Cover Influence on Water pH

Meiirkhanuly

Kozieł

Białowiec

et al. 2019

Water

View full text Add to dashboard Cite

show abstract

“…Heavy metals not only contaminate the environment and as well as potential threats to human health. The decomposition of rare earth metals plays a primary attention because of their physical properties such as solubility in water, redox characteristics, and formation of complex compound . In the previous year, a major environmental burden is toxic metal pollution due to it will cause an ecological imbalance as well as human health even at the very least amount.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Sawdust‐based Poly(amidoxime) Ligand for Heavy Metals Removal from Wastewater

et al. 2019

View full text Add to dashboard Cite

In this study, a copolymer sawdust-graft-poly(acrylonitrile) was synthesized by free-radical initiation reaction and followed by amidoximation reaction with hydroxylamine under alkaline conditions converted into the poly(amidoxime) ligand. The functional group, compositions, and morphology of the resulting synthesized ligand and copolymer were identified by Fourier transform infrared spectroscopy, scanning electron microscopy and elemental analysis. The poly(amidoxime) ligand was utilized for heavy metal removal from aqueous solution. The synthesized polymeric ligand demonstrated a high affinity for adsorption capacity for copper and iron was 265.5 and 270.1 mg g -1 , respectively. The strong adsorption capacity for lead, zinc, and cobalt were 121.2, 161.7 and 165.4 mg g -1 , respectively. The adsorption data was excellently expressed by the Langmuir isotherm model (R2 > 0.98) rather than Freundlich. It is suggesting that the surface of ligand is monolayer and homogeneous. The kinetic data have been determined by the first and second order. However, pseudo-second-order rate equation was well fit to the presented data. In wastewater purification process, poly(amidoxime) ligand was well removal multiple metal ions that present in the wastewater and the efficiency of removal was reached to 98.78% for copper and 99.14% iron and 90.92% for lead and 92.73% for zinc.[a] C.

show abstract

“…Heavy metals among these toxic substances can easily be accumulated in the surrounding environment [12]. Commercial activities such as metal processing, mining, geothermal energy plants, automotive, paper, pesticide manufacturing, tanning, dying and plating are held responsible for global contamination of heavy metals [13,14]. Removal of heavy metals from the wastewater is difficult because they exist in different chemical forms.…”

mentioning

confidence: 99%

Application of Floating Aquatic Plants in Phytoremediation of Heavy Metals Polluted Water: A Review

et al. 2020

View full text Add to dashboard Cite

Heavy-metal (HM) pollution is considered a leading source of environmental contamination. Heavy-metal pollution in ground water poses a serious threat to human health and the aquatic ecosystem. Conventional treatment technologies to remove the pollutants from wastewater are usually costly, time-consuming, environmentally destructive, and mostly inefficient. Phytoremediation is a cost-effective green emerging technology with long-lasting applicability. The selection of plant species is the most significant aspect for successful phytoremediation. Aquatic plants hold steep efficiency for the removal of organic and inorganic pollutants. Water hyacinth (Eichhornia crassipes), water lettuce (Pistia stratiotes) and Duck weed (Lemna minor) along with some other aquatic plants are prominent metal accumulator plants for the remediation of heavy-metal polluted water. The phytoremediation potential of the aquatic plant can be further enhanced by the application of innovative approaches in phytoremediation. A summarizing review regarding the use of aquatic plants in phytoremediation is gathered in order to present the broad applicability of phytoremediation.

show abstract

Removal of heavy metals from simulated wastewater by in situ formation of layered double hydroxides

Cited by 150 publications

References 32 publications

The-Proof-of-Concept of Biochar Floating Cover Influence on Water pH

The-Proof-of-Concept of Biochar Floating Cover Influence on Water pH

Synthesis of Sawdust‐based Poly(amidoxime) Ligand for Heavy Metals Removal from Wastewater

Application of Floating Aquatic Plants in Phytoremediation of Heavy Metals Polluted Water: A Review

Contact Info

Product

Resources

About