Cadmium removal from simulated groundwater using alumina nanoparticles: behaviors and mechanisms

Koju, Neel Kamal; Song, Xin; Wang, Qing; Hu, Zhihao; Colombo, Claudio

doi:10.1016/j.envpol.2018.04.107

Cited by 52 publications

(22 citation statements)

References 58 publications

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“…Synthesized alumina nanoparticles and alumina nanoparticles modified with negatively charged glycerol were tested for high-efficiency Cd removal from simulated groundwater [155]. The maximum removal efficiencies of both synthesized and glycerol-modified alumina nanoparticles were about 99%-100%.…”

Section: Phytoremediation Nanoparticles and Microbial Fermentation Against Cadmium Toxicitymentioning

confidence: 99%

The Effects of Cadmium Toxicity

Genchi

Sinicropi

Lauria

et al. 2020

IJERPH

1,627

602

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Cadmium (Cd) is a toxic non-essential transition metal that poses a health risk for both humans and animals. It is naturally occurring in the environment as a pollutant that is derived from agricultural and industrial sources. Exposure to cadmium primarily occurs through the ingestion of contaminated food and water and, to a significant extent, through inhalation and cigarette smoking. Cadmium accumulates in plants and animals with a long half-life of about 25–30 years. Epidemiological data suggest that occupational and environmental cadmium exposure may be related to various types of cancer, including breast, lung, prostate, nasopharynx, pancreas, and kidney cancers. It has been also demonstrated that environmental cadmium may be a risk factor for osteoporosis. The liver and kidneys are extremely sensitive to cadmium’s toxic effects. This may be due to the ability of these tissues to synthesize metallothioneins (MT), which are Cd-inducible proteins that protect the cell by tightly binding the toxic cadmium ions. The oxidative stress induced by this xenobiotic may be one of the mechanisms responsible for several liver and kidney diseases. Mitochondria damage is highly plausible given that these organelles play a crucial role in the formation of ROS (reactive oxygen species) and are known to be among the key intracellular targets for cadmium. When mitochondria become dysfunctional after exposure to Cd, they produce less energy (ATP) and more ROS. Recent studies show that cadmium induces various epigenetic changes in mammalian cells, both in vivo and in vitro, causing pathogenic risks and the development of various types of cancers. The epigenetics present themselves as chemical modifications of DNA and histones that alter the chromatin without changing the sequence of the DNA nucleotide. DNA methyltransferase, histone acetyltransferase, histone deacetylase and histone methyltransferase, and micro RNA are involved in the epigenetic changes. Recently, investigations of the capability of sunflower (Helianthus annuus L.), Indian mustard (Brassica juncea), and river red gum (Eucalyptus camaldulensis) to remove cadmium from polluted soil and water have been carried out. Moreover, nanoparticles of TiO2 and Al2O3 have been used to efficiently remove cadmium from wastewater and soil. Finally, microbial fermentation has been studied as a promising method for removing cadmium from food. This review provides an update on the effects of Cd exposure on human health, focusing on the cellular and molecular alterations involved.

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Section: Phytoremediation Nanoparticles and Microbial Fermentation Against Cadmium Toxicitymentioning

confidence: 99%

The Effects of Cadmium Toxicity

Genchi

Sinicropi

Lauria

et al. 2020

IJERPH

1,627

602

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“…The Langmuir model is frequently used to describe the deposition of a complete monolayer of the metal on the surface of the material via adsorption processes. This model assumes that the Cd ions are adsorbed by forming a homogeneous monolayer on the active sites in the surfaces of the adsorbent and there are no interactions between the adsorbed ions [ 32 ]. This is described by Equation (1) [ 43 , 44 ]:

where

is the concentration of adsorbate in the solution at equilibrium;

is the adsorption capacity at equilibrium of the adsorbent surface;

is the Langmuir isotherm constant and

is the monolayer capacity of the adsorbent.…”

Section: Resultsmentioning

confidence: 99%

“…The Hosain et al study on magnetic nanoparticles cross-linked succinic anhydride reported a maximum removal efficiency of Cd from wastewater samples of 57.6% [ 29 ] and Chen et al [ 30 ] a removal of 96% using functionalized Fe 3 O 4 nanoparticles. For nanomaterials based on alumina (Al 2 O 3 ), the maximum removal efficiencies reported are between 31% and 99% [ 31 , 32 ]. These, however, rarely include the recovery studies and toxicity analysis to determine the viability of using the related components on a larger scale.…”

Section: Introductionmentioning

confidence: 99%

Functionalization and Evaluation of Inorganic Adsorbents for the Removal of Cadmium in Wastewater

et al. 2021

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This study presents the feasibility of using various functionalized substrates, Fe3O4 nanoparticles (NPs) and Al2O3 spheres, for the removal of Cd from aqueous solution. To improve the materials’ affinity to Cd, we explored four different surface modifications, namely (3-Aminopropyl) triethoxysilane (APTES), L-Cysteine (Cys) and 3-(triethoxysilyl) propylsuccinic anhydride (CAS). Particles were characterized by FTIR, FIB-SEM and DLS and studied for their ability to remove metal ions. Modified NPs with APTES proved to be effective for Cd removal with efficiencies of up to 94%, and retention ratios up to 0.49 mg of Cd per g of NPs. Batch adsorption experiments investigated the influence of pH, contact time, and adsorbent dose on Cd adsorption. Additionally, the recyclability of the adsorbent and its potential phytotoxicity and animal toxicity effects were explored. The Langmuir, Freundlich, pseudo-first-order and pseudo-second-order models were applied to describe the behavior of the Cd adsorption processes. The adsorption and desorption results showed that Fe3O4 NPs modified with APTES are promising low-cost platforms with low phytotoxicity for highly efficient heavy metal removal in wastewater.

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“…However, the entering of many heavy metals into the open environment due to the effluent discharge from various anthropogenic activities leads to numerous environmental problems [1]. Cadmium is one of the most toxic heavy metals caused by its high tendency for bioaccumulation and high mobility in the environment [2]. Moreover, cadmium is classified as the top ten of the most dangerous chemicals for human health and it cannot naturally be removed or reduces.…”

Section: ■ Introductionmentioning

confidence: 99%

“…According to the World Health Organization (WHO), the limit of permissible cadmium concentration in the groundwater is less than 3 μg/L. Even though, cadmium is still widely used in many industrial process such as batteries, color pigment, and electroplating [2]. Hence the removal of cadmium from aqueous solution is a mandatory in order to maintain the environmental live cycles and to support the green environment process.…”

Section: ■ Introductionmentioning

confidence: 99%

Adsorption of Cadmium(II) Using Ca/Al Layered Double Hydroxides Intercalated with Keggin Ion

et al. 2019

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Ca/Al layered double hydroxides (Ca/Al LDH) was synthesized using co-precipitation method following calcination at 800 °C and was intercalated with Keggin ion [α-SiW12O40]4– to form intercalated Ca/Al LDH. Materials were characterized using XRD and FTIR spectrophotometer. Furthermore, materials were used as an adsorbent of cadmium(II) from solution. The results showed that layer material was formed completely after calcination which was indicated at diffraction 20° due to loss of water in the interlayer space. Ca/Al LDH after calcination was intercalated with [α-SiW12O40]4– ion and interlayer distance was increased from 4.25 to 4.41 Å showed that intercalation process was successfully conducted. Adsorption of cadmium(II) using Ca/Al LDH was conducted at pH 9 and intercalated Ca/Al LDH at pH 8 showed that intercalated material has slightly faster than Ca/Al LDH without intercalation probably due to slightly increasing interlayer distance of Ca/Al LDH after intercalation. The adsorption capacity of intercalated Ca/Al LDH was higher than Ca/Al LDH without intercalation at the temperature range of 30–50 °C.

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Cadmium removal from simulated groundwater using alumina nanoparticles: behaviors and mechanisms

Cited by 52 publications

References 58 publications

The Effects of Cadmium Toxicity

The Effects of Cadmium Toxicity

Functionalization and Evaluation of Inorganic Adsorbents for the Removal of Cadmium in Wastewater

Adsorption of Cadmium(II) Using Ca/Al Layered Double Hydroxides Intercalated with Keggin Ion

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