Enhancement of Cd(II) adsorption by polyacrylic acid modified magnetic mesoporous carbon

Zeng, Guangming; Liu, Yuanyuan; Tang, Lin; Yang, Guide; Pang, Ya; Zhang, Yi; Zhou, Yaoyu; Li, Zhen; Li, Mengyan; Lai, Mingyong; He, Xiaoxiao; He, Yiming

doi:10.1016/j.cej.2014.07.115

Cited by 186 publications

(59 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Conventional soil remediation technologies entail large costs for the remediation of heavy metals-polluted sites. Therefore, it is a matter of great urgency to develop green Responsible editor: Elena Maestri * Yunguo Liu liuyunguo2012@yeah.net 1 and efficient technologies which can remove heavy metals from contaminated soil (Zeng et al 2015). Compared with physical and chemical techniques of remediation, the developing phytoremediation technologies which aim to extract or inactivate metals from contaminated soil have attracted much public attention for their cost-effective and environmental friendly performances (Ji et al 2011;Pilon-Smits 2005).…”

Section: Introductionmentioning

confidence: 99%

Cadmium accumulation and tolerance of Macleaya cordata: a newly potential plant for sustainable phytoremediation in Cd-contaminated soil

Nie

Liu

Zeng

et al. 2016

Environ Sci Pollut Res

Self Cite

View full text Add to dashboard Cite

Heavy metal pollution is a major concern of the public due to their threats to the safety of food chains. A 60-day pot experiment was conducted using Macleaya cordata as plant material to investigate the phytoremediation potential and anti-oxidative responses of M. cordata under different Cd stress. Significant growth inhibition phenomenon and toxic symptoms were not detected in the experiment. The high biomass of the plant provided high accumulation capacity for Cd with an average dry weight of 3.6 g. The maximum extraction amount of Cd was 393 μg·plant(-1), suggesting that this species had potential for phytoremediation of Cd-contaminated soil. A slight increase of chlorophyll (CHL) content was observed in Cd10 treatment. The plant was confirmed to have relatively high tolerance to the Cd stress on the basis of tolerance indexes (TI), relative water content, and CHLa/CHLb ratio. M. cordata could maintain high level of superoxide dismutase (SOD) activity under Cd stress, indicating strong tolerance capacity for reactive oxygen species (ROS) in plant cells. Catalase (CAT) activity show a certain range of decline in the experiment compare to the control. And peroxidase (POD) activity in leaves changed irregularly when compared to the control. The malondialdehyde (MDA) content increased as Cd concentration elevated compared to the control. In addition, as an inedible crop with relatively high economic value, M. cordata have shown the advantage of high biomass and high tolerance under Cd stress, which can provide a new plant resource for sustainable phytoremediation.

show abstract

Section: Introductionmentioning

confidence: 99%

Cadmium accumulation and tolerance of Macleaya cordata: a newly potential plant for sustainable phytoremediation in Cd-contaminated soil

Nie

Liu

Zeng

et al. 2016

Environ Sci Pollut Res

Self Cite

View full text Add to dashboard Cite

show abstract

“…Metal pollution in water bodies has aroused increasing public concerns due to its widespread relevance in industrial processes and the potential toxicity of the metals, even at low concentrations [1,2]. The cadmium ion (Cd(II)) is one of the most toxic heavy metal ions in aquatic systems from industrial wastewater, especially in water affected by electroplating, smelting, alloy, mining, metallurgy, pigment works, production of alkaline batteries, plastic manufacturing and photography [2,3].…”

Section: Introductionmentioning

confidence: 99%

“…The cadmium ion (Cd(II)) is one of the most toxic heavy metal ions in aquatic systems from industrial wastewater, especially in water affected by electroplating, smelting, alloy, mining, metallurgy, pigment works, production of alkaline batteries, plastic manufacturing and photography [2,3]. Cd(II) is very harmful because of its long biological half-life, non-biodegradable nature, toxicity, carcinogenic nature and accumulation in different body parts [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Cd(II) by Mg–Al–CO3- and magnetic Fe3O4/Mg–Al–CO3-layered double hydroxides: Kinetic, isothermal, thermodynamic and mechanistic studies

Shan

Yan

Yang

et al. 2015

Journal of Hazardous Materials

242

View full text Add to dashboard Cite

“…Singh et al (2009) also found that arsenic (III) adsorption was favoured at low solute concentration. Under certain conditions, there is an increase in removal efficiency with increased pH (Chaouch et al 2014;Zeng et al 2015); at high pH, the adsorbent surface assumes a net negative charge, which favours the attraction and subsequent adsorption of positively charged ions. Cozmuta et al (2012) observed that lead complexes favoured at low pH have smaller hydrated radii and are therefore more mobile than the normal lead ion.…”

Section: Efficiency Of Lead Adsorption By Rhamentioning

confidence: 99%

“…The favourability of the process was further investigated using the dimensionless parameter RL estimated by Eq. 14, where RL = 0 suggests that the adsorption process is irreversible; 0 <RL< 1 denotes a favourable process; RL = 1 suggests that the process is linear; and RL> 1 suggests that the adsorption process is unfavourable (Zeng et al 2015).…”

Section: Efficiency Of Lead Adsorption By Rhamentioning

confidence: 99%

Physicochemical Conditions for Adsorption of Lead from Water by Rice Husk Ash

Nnaji¹,

Ebeagwu²,

Ugwu³

2016

BioResources

View full text Add to dashboard Cite

The effects of physico-chemical parameters such as pH, temperature, and lead concentration on the efficiency of lead adsorption by rice husk ash were determined. Rice husk was incinerated at 800 °C for 6 h and then activated with 0.5 M HCl. Rice husk and rice husk ash (RHA) were characterized using scanning electron microscopy and X-ray fluorescence. Batch adsorption tests were conducted at different pH, temperature, and initial lead concentration. Kinetic studies were conducted at optimum pH of 3.0. The optimum lead removal of 80% was recorded at pH 3.0. Efficiency of lead removal by RHA decreased to 45% as pH increased to 9.0. Freundlich, Langmuir, Temkin, and Dubinin Radushkevich (D-R) isotherms performed acceptably well, with R 2 values of 0.954≤R 2 ≤0.991, 0.965≤R 2 ≤0.996, 0.949≤R 2 ≤0.979, and 0.970≤R 2 ≤0.997, respectively. Lead removal efficiency decreased from 75% to 50% as temperature increased from 30 °C to 40 °C. The adsorption of lead by RHA was by ion exchange in the acidic pH range and by physisorption in the alkaline pH range. Thermodynamic studies revealed that the process was exothermic and spontaneous and further confirmed the feasibility of the process with -22.34≤∆G 0 ≤-24.94. The intraparticle diffusion model and the pseudo first order kinetic model fit the experimental data very well, with average R 2 values of 0.985 and 0.987, respectively.

show abstract

Enhancement of Cd(II) adsorption by polyacrylic acid modified magnetic mesoporous carbon

Cited by 186 publications

References 39 publications

Cadmium accumulation and tolerance of Macleaya cordata: a newly potential plant for sustainable phytoremediation in Cd-contaminated soil

Cadmium accumulation and tolerance of Macleaya cordata: a newly potential plant for sustainable phytoremediation in Cd-contaminated soil

Adsorption of Cd(II) by Mg–Al–CO3- and magnetic Fe3O4/Mg–Al–CO3-layered double hydroxides: Kinetic, isothermal, thermodynamic and mechanistic studies

Physicochemical Conditions for Adsorption of Lead from Water by Rice Husk Ash

Contact Info

Product

Resources

About