Layered silicate RUB-15 for efficient removal of UO22+ and heavy metal ions by ion-exchange

2017 ◽  
Vol 4 (9) ◽  
pp. 1851-1858 ◽  
Author(s):  
Zhe Chen ◽  
Yu Liang ◽  
Dashuang Jia ◽  
Wanying Chen ◽  
Zhimin Cui ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Ion Exchange ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Layered Silicate ◽  
High Adsorption ◽  
Efficient Removal

Layered silicate RUB-15 exhibited high adsorption abilities for not only UO22+ but also heavy metal ions through ion-exchange.

scholarly journals Porous BMTTPA–CS–GO nanocomposite for the efficient removal of heavy metal ions from aqueous solutions

RSC Advances ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 3725-3731
Author(s):  
Juan Huang ◽  
Weirong Cui ◽  
Ruping Liang ◽  
Li Zhang ◽  
Jianding Qiu
Keyword(s):  
Heavy Metal ◽  
Aqueous Solutions ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Polluted Water ◽  
Efficient Removal

Novel porous BMTTPA–CS–GO nanocomposites are prepared by covalently grafting BMTTPA–CS onto GO surfaces, and used for efficient removal of heavy metal ions from polluted water.

Efficient removal of heavy metal ions based on the selective hydrophilic channels

2019 ◽  
Vol 359 ◽  
pp. 1644-1651 ◽  
Author(s):  
Xinzhen Zhao ◽  
Changkun Liu
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Efficient Removal

scholarly journals Modified ion exchange jackfruit seeds resin for removal of selected trace heavy metal ions from aqueous solution

2021 ◽  
Vol 2 (2) ◽  
pp. 84-92
Author(s):  
S N Ndung’u ◽  
E W Nthiga ◽  
R N Wanjau
Keyword(s):  
Heavy Metal ◽  
Ion Exchange ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Active Sites ◽  
Ion Exchange Resin ◽  
Standard Entropy ◽  
Environmentally Sustainable ◽  
Heavy Metal Ions Removal ◽  
Metal Ions Removal

Water is essential for every life processes. However, its quality is deteriorating every day due to the recent industrial advancements. Anthropogenic processes such as industrialization, mining and agricultural activities have led to alarming discharge of heavy metal ions to the aquatic bodies. This possess a greater threat to human, animal and the entire ecosystem wellbeing. Accumulation of heavy metal ions in drinking water beyond permissible limits is detrimental to human health. Therefore, their removal is paramount. Conventional remediation techniques have been employed but have remained expensive and not universally appropriate. This has therefore spurred research interests in the use of adsorption techniques from locally available materials as an environmentally sustainable alternative. Jackfruit seeds are discarded as wastes of a Jackfruit and can be utilized as an ion exchange resin in heavy metal ions removal from wastewater. The present study involved application of previously prepared raw and modified Jackfruit seed resins to study thermodynamics of copper (II), lead (II) and cadmium (II) ions adsorption from synthetic water. FTIR results showed presence of functional groups in raw and modified resins as important sites for studying thermodynamics of adsorption of copper (II), lead (II) and cadmium (II) ions. Thermodynamic data showed that standard Gibb’s free energy () values for all metals were negative indicating that adsorption process was feasible and favourable. Standard enthalpy change (), standard entropy () and activation energy () were positive (> 40 kJ mol-1) and in the order lead (II) > copper (II) > cadmium (II). This confirmed adsorption of copper (II), lead (II) and cadmium (II) ions onto both raw and modified resins was predominated by chemical interactions between the metal ions and the resin active sites. This was confirmed by very low values of sticking probability (S*). The findings indicated that ion exchange Jackfruit seeds resin is promising for heavy metal ions removal from wastewater in an optimized temperature controlled system.

A new functionalized reduced graphene oxide adsorbent for removing heavy metal ions in water via coordination and ion exchange

2018 ◽  
Vol 53 (18) ◽  
pp. 2896-2905 ◽  
Author(s):  
Chao-Zhi Zhang ◽  
Bin Chen ◽  
Yuan Bai ◽  
Jing Xie
Keyword(s):  
Heavy Metal ◽  
Graphene Oxide ◽  
Ion Exchange ◽  
Metal Ions ◽  
Reduced Graphene Oxide ◽  
Heavy Metal Ions ◽  
Reduced Graphene

Recent Advances in Water Treatment Using Graphene-based Materials

2020 ◽  
Vol 17 (1) ◽  
pp. 74-90 ◽  
Author(s):  
Nader Ghaffari Khaligh ◽  
Mohd Rafie Johan
Keyword(s):  
Heavy Metal ◽  
Water Treatment ◽  
Ion Exchange ◽  
Metal Ions ◽  
Metal Ion ◽  
Heavy Metal Ions ◽  
Membrane Filtration ◽  
Chemical Precipitation ◽  
High Specific Surface Area ◽  
Adsorption Parameters

: A variety of processes were reported for efficient removing of heavy metal from wastewater, including but not limited to ion exchange, reverse osmosis, membrane filtration, flotation, coagulation, chemical precipitation, solvent extraction, electrochemical treatments, evaporation, oxidation, adsorption, and biosorption. Among the aforementioned techniques, adsorption/ion exchange has been known as a most important method for removing heavy metal ions and organic pollutants due to great removal performance, simple and easy process, cost-effectiveness and the considerable choice of adsorbent materials. : Nanotechnology and its applications have been developed in most branches of science and technology. Extensive studies have been conducted to remove heavy metal ions from wastewater by preparation and applications of various nanomaterials. Nanomaterials offer advantages in comparison to other materials including an extremely high specific surface area, low-temperature modification, short intraparticle diffusion distance, numerous associated sorption sites, tunable surface chemistry, and pore size. In order to evaluate an adsorbent, two key parameters are: the adsorption capacity and the desorption property. The adsorption parameters including the absorbent loading, pH and temperature, concentration of heavy metal ion, ionic strength, and competition among metal ions are often studied and optimized. : Several reviews have been published on the application of Graphene (G), Graphene Oxide (GO) in water treatment. In this minireview, we attempted to summarize the recent research advances in water treatment and remediation process by graphene-based materials and provide intensive knowledge of the removal of pollutants in batch and flow systems. Finally, future applicability perspectives are offered to encourage more interesting developments in this promising field. This minireview does not include patent literature.

scholarly journals Expression of concern: One-pot synthesis of O-doped BN nanosheets as a capacitive deionization electrode for efficient removal of heavy metal ions from water

2019 ◽  
Vol 7 (6) ◽  
pp. 2919-2919
Author(s):  
Sam Keltie
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Capacitive Deionization ◽  
Efficient Removal ◽  
One Pot ◽  
One Pot Synthesis

Expression of concern for ‘One-pot synthesis of O-doped BN nanosheets as a capacitive deionization electrode for efficient removal of heavy metal ions from water’ by Ming Ming Chen et al., J. Mater. Chem. A, 2017, 5, 17029–17039.

Efficient removal of heavy metal ions from aqueous solution using salicylic acid type chelate adsorbent

2011 ◽  
Vol 192 (3) ◽  
pp. 956-962 ◽  
Author(s):  
Fuqiang An ◽  
Baojiao Gao ◽  
Xin Dai ◽  
Min Wang ◽  
Xiaohua Wang
Keyword(s):  
Aqueous Solution ◽  
Heavy Metal ◽  
Salicylic Acid ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Efficient Removal ◽  
Acid Type

Hierarchically Structured Manganese Oxide-Coated Magnetic Nanocomposites for the Efficient Removal of Heavy Metal Ions from Aqueous Systems

2013 ◽  
Vol 5 (19) ◽  
pp. 9628-9634 ◽  
Author(s):  
Eun-Ju Kim ◽  
Chung-Seop Lee ◽  
Yoon-Young Chang ◽  
Yoon-Seok Chang
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Manganese Oxide ◽  
Heavy Metal Ions ◽  
Magnetic Nanocomposites ◽  
Aqueous Systems ◽  
Efficient Removal
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