scholarly journals Heavy Metal Removal from Aqueous Solution Using Biosurfactants Produced by Pseudomonas aeruginosa with Corn Oil as Substrate

2018 ◽  
Vol 18 (3) ◽  
pp. 472
Author(s):  
Venty Suryanti ◽  
Sri Hastuti ◽  
Tutik Dwi Wahyuningsih ◽  
Mudasir Mudasir ◽  
Dian Kresnadipayana ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Heavy Metal ◽  
Metal Ions ◽  
Contact Time ◽  
Metal Ion ◽  
Metal Removal ◽  
Corn Oil ◽  
Metal Ion Removal ◽  
Ion Removal ◽  
Removal Capacity

The batch removal of Cu(II), Cd(II) and Pb(II) from individual heavy metal ion aqueous synthetic solution using biosurfactants produced by Pseudomonas aeruginosa with corn oil as substrate was investigated. The metal ion removal process of crude preparation biosurfactants (CPB) was established to be dependent on the initial pH and contact time. The optimum metal removal was observed at pH 6.0 of the initial metal solution and 10 min of contact time. The affinity sequence for metal ion removal was Pb(II)>Cd(II)>Cu(II). The removal capacity value of biosurfactant for Cu(II), Cd(II) and Pb(II) from single metal ions solution were 0.169, 0.276 and 0.323 mg/g, respectively. The removal capacity value of biosurfactant for Cu(II), Cd(II) and Pb(II) from multi metal ions solution were 0.064, 0.215 and 0.275 mg/g, respectively. The removal capacity of individual metal ion was diminished by the presence of other metal ions in multi metal ions from synthetic aqueous solution. The removal capacity value of biosurfactant for Cu(II), Cd(II) and Pb(II) from silver industry wastewater were 0.027, 0.055 and 0.291 mg/g, respectively. The results indicated that biosurfactants have potential to be used in the remediation of heavy metals in industrial wastewater.

Efficient heavy metal ion removal by triazinyl-β-cyclodextrin functionalized iron nanoparticles

RSC Advances ◽  
2015 ◽  
Vol 5 (110) ◽  
pp. 90602-90608 ◽  
Author(s):  
Amir Abdolmaleki ◽  
Shadpour Mallakpour ◽  
Sedigheh Borandeh
Keyword(s):  
Heavy Metal ◽  
Aqueous Solutions ◽  
Metal Ion ◽  
Iron Nanoparticles ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Metal Ion Removal ◽  
Ion Removal ◽  
Heavy Metal Ion Removal ◽  
Nano Adsorbent

A novel magnetic nano-adsorbent containing Fe3O4 nanoparticles functionalized with MCT-β-CD was fabricated and exhibited a remarkable enhancement in heavy metal removal efficiency from aqueous solutions.

scholarly journals Insights into the Recent Use of Modified Adsorbents in Removing Heavy Metal Ions from Aqueous Solution

2021 ◽  
Vol 12 (2) ◽  
pp. 1884-1898
Keyword(s):  
Aqueous Solution ◽  
Heavy Metal ◽  
Metal Ions ◽  
Metal Ion ◽  
Heavy Metal Ions ◽  
Metal Removal ◽  
Low Cost ◽  
Ion Concentration ◽  
Future Research ◽  
Batch Tests

Natural water gets contaminated with heavy metal ions because of industrial effluents' discharge into the aquatic environment. As these heavy metal ions cause various health hazards, they should be removed from the aqueous solution. Heavy metal ion concentration in the aqueous solution is very less, so conventional metal removal and recovery processes cannot be applied here. The adsorption method is a great alternative to all these processes as it is a cost-effective and easy method. The use of natural, low-cost materials as adsorbents is eco-friendly also. However, metal uptake capacity of low-cost materials is very less. So, modification is required for low-cost materials to increase their efficiency. In the present review, different modification procedures adopted by different researchers have been discussed. Different low-cost materials used are sawdust, fruit and vegetable wastes, soil, minerals, etc. The modifying agents are heat, acids, bases, and other chemicals. Nevertheless, most of the studies are limited to batch tests only. Future research should be carried out on the extension of batch tests to column study for the large-scale treatment of contaminated water, and the cost of modification procedures and their impact on the environment should also be assessed.

Effect of Different Chemical and Physical Characteristic Having Lignocellulosic Fibers on Heavy Metal Ion Removal from Auqueous Solution

2008 ◽  
Vol 569 ◽  
pp. 285-288 ◽  
Author(s):  
Hyun Jong Lee ◽  
Beom Goo Lee ◽  
Dae Yong Shin ◽  
Heon Park
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Metal Ion ◽  
Heavy Metal Ions ◽  
Heavy Metal Ion ◽  
Metal Ion Removal ◽  
Ion Removal ◽  
Lignocellulosic Fibers ◽  
Heavy Metal Ion Removal ◽  
Kenaf Bast

In this study lignocellulosic fibers, such as kenaf bast, kenaf core, sugar cane bagasse, cotton, coconut coir, and spruce, which are environment friendly natural materials, were tested for their ability to remove copper, nickel and zinc ions from aqueous solutions. The fibers were analyzed for Klason lignin content, water sorption capacity and dry volume. The fiber with the highest level of heavy metal removal in the separate and mixed solution was kenaf bast.. In the mixed solution kenaf bast, sugar cane bagasse and cotton removed more copper and nickel ion than in the separate solution, and the amounts of removed heavy metal ions were changed in some lignocellulosic fibers, compared to those of the separate solution. In the mixed solution heavy metal ions may compete with one another for sorption sites on the surface of lignocellusic fiber. In kenaf bast to remove heavy metal ions most, Klason lignin content was the second lowest, and water sorption and dry volume were the lowest in all tested lignocellulosic fibers. It showed that removal of heavy metal ions does not correlate with any chemical and physical factors, but may be affected by the cell wall structure of lignocellulosic fibers and how many free phenolic groups in lignin, which are considered as the heavy metal ion binding site, are exposed on the surface of fibers. Cotton, with about 1% Klason lignin, was very low in heavy metal ion removal, while all other fibers containing greater than about 10% lignin did remove heavy metal ions. It showed that even the lignin content of lignocellulosic fibers does not correlate with heavy metal ion removal but lignin does play a role in heavy metal ion removal.

Thermoresponsive Ion-Imprinted Composite Hydrogels for Heavy Metal Ion Removal

2013 ◽  
Vol 661 ◽  
pp. 162-165 ◽  
Author(s):  
Jing Jing Wang ◽  
Xian Ning Li
Keyword(s):  
Aqueous Solution ◽  
Heavy Metal ◽  
Metal Ion ◽  
Heavy Metal Ions ◽  
Metal Ion Removal ◽  
Ion Removal ◽  
Ion Imprinted ◽  
Heavy Metal Ion Removal ◽  
Gel Transition

A novel thermoresponsive Cu(II) ion-imprinted composite hydrogel [Cu(II)-IICH] based on N-isopropylacrylamide (NIPAM) and aminated silica (SiO2-NH2) has been prepared by in situ free-radical polymerization using Cu(II) ion as template. The Cu(II)-IICH was used to remove heavy metal ions from aqueous solution at 20 and 40oC. The Cu(II)-IICH selectively bound the template ion above a critical gel transition temperature (CGTT) of crosslinked poly(N-isopropylacrylamide) (PNIPAM). The memory was fixed by shrinking above the CGTT, and was deleted by swelling below the CGTT. In order to study the reusability of the Cu(II)-IICH, the sorption-desorption cycles were performed for five times. The results suggested that the Cu(II)-IICH can be used for several times without significantly decreasing its adsorption capacity.

scholarly journals Selective Removal of Toxic Ions from Water/Wastewater: Using a Novel Surfactant

Substantia ◽  
2021 ◽  
pp. 79-88
Author(s):  
Mohammad Ziaee ◽  
Mojtaba Taseidifar ◽  
Richard M. Pashley ◽  
Barry W. Ninham
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Metal Ion ◽  
Heavy Metal Ions ◽  
Toxic Heavy Metal ◽  
Metal Ion Removal ◽  
Ion Removal ◽  
Advantages And Disadvantages ◽  
Heavy Metal Ion Removal ◽  
Green Surfactant

Pollution of drinking water by toxic heavy-metal ions is a matter of concern worldwide. These ions occur naturally, and also from environmental spills, radioactive wastes and other industrial waste. Arsenic and lead are typical examples. A novel green surfactant, purpose designed, and environmentally friendly is shown to be extremely effective and specific for heavy metal ion removal. This is a considerable step forward on previous technologies. Surfactants have been used universally to remove organic and inorganic contaminants from water. But little selectivity has been achieved. After usage, the residual surfactants are discharged into surface waters or sewage systems.  This causes environmental pollution. In this review, three surfactants from different classes (novel green surfactant, synthetic chemical surfactant and biosurfactant) are compared in terms of their efficiency in flotation, removal of different heavy-metal ions, biodegradability, and toxicity level, including their advantages and disadvantages.

scholarly journals Biosorptive Removal of Cadmium(II) and Copper(II) Using Microwave-Assisted Thiourea-Modified Sorghum bicolor Agrowaste

2020 ◽  
Vol 2020 ◽  
pp. 1-11 ◽  
Author(s):  
Muhammad Salman ◽  
Rabia Rehman ◽  
Umar Farooq ◽  
Anum Tahir ◽  
Liviu Mitu
Keyword(s):  
Metal Ions ◽  
Sorghum Bicolor ◽  
Metal Ion ◽  
Toxic Metal ◽  
Order Kinetic ◽  
Metal Ion Removal ◽  
Ion Removal ◽  
Removal Capacity ◽  
Biosorption Process ◽  
Ft Ir

Sorghum bicolor (S.B.) is used in this work for preparing chemically modified adsorbent for toxic metal ions, i.e., cadmium(II) and copper(II). Thiourea is selected for chemical modification of this plant waste by microwave solid fusion methodology, so that its chelating ability for metal ions can be enhanced in both acidic and basic conditions, in a cheaper and quicker way. Characterization was carried out by different physiochemical means using FT-IR, SEM, etc. An increase in pHpzc value was observed in TSB, which is confirmed by FT-IR analysis. The effect of biosorption process parameters was also studied and found that maximum removal of these toxic ions occurred in slightly acidic pH (5-6) conditions, following pseudo-second-order kinetic model. Boyd plots indicated that film dispersion mode was the rate-determining step. Langmuir model indicated that the maximum metal ion removal capacity of TSB was 17.241 mg/g and 15.151 mg/g for cadmium(II) and copper(II) ions. So, TSB can be used on a larger scale for toxic metal ion removal by Sorghum bicolor waste in a cleaner way.

Enhanced Adsorption Properties of Poly(2-Acrylamido-2-Methyl-1-Propansulfonic Acid)/Silica Composite Materials for Heavy Metal Ion Removal

2012 ◽  
Vol 164 ◽  
pp. 154-157
Author(s):  
Jing Jing Wang ◽  
Xian Ning Li
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Metal Ion ◽  
Silica Content ◽  
Metal Ion Removal ◽  
Composite Hydrogels ◽  
Ion Removal ◽  
Silica Composite ◽  
Heavy Metal Ion Removal ◽  
Enhanced Adsorption

Poly(2-acrylamido-2-methyl-1-propansulfonic acid)(PAMPS)/silica composite hydrogels have been prepared by in situ free-radical polymerization. The composite hydrogels were used to remove heavy metal ions from aqueous solution under the non-competitive condition. The results showed that the adsorption capacity of the hydrogels increased with the pH values and silica content in the formulation. Furthermore, the synergistic complexation of metal ions was found in the adsorption studies. Regeneration studies suggested that metal rebinding capacity of the hydrogels did not change significantly through repeated applications compared with the first run.

Development of seaweed biomass as a biosorbent for metal ions

2003 ◽  
Vol 47 (10) ◽  
pp. 49-54 ◽  
Author(s):  
T.C. Lau ◽  
P.O. Ang ◽  
P.K. Wong
Keyword(s):  
Metal Ions ◽  
Metal Ion ◽  
Ulva Lactuca ◽  
Metal Ion Removal ◽  
Ion Removal ◽  
Removal Capacity ◽  
Almost All ◽  
Adsorption Desorption ◽  
Hong Kong Waters ◽  
Target Metal

Three seaweed species collected from Hong Kong waters were screened for their adsorption abilities for Cu2+, Ni2+ and Zn2+; and Ulva lactuca having the highest metal ion removal capacity (RC) was chosen for further study. Effects of algal biomass and medium pH on the metal ions RC of Ulva lactuca were determined and optimized. Under the optimal conditions of the corresponding metal ions, the algal Cu2+, Ni2+ and Zn2+ RCs were 65.54, 21.00 and 49.54 mg/g, respectively. The presence of other cations and anions affected the metal ions adsorption by the seaweed. The effect was dependent on the combination between the target metal ions and other cations/anions. The kinetic study revealed that the adsorption of Cu2+, Ni2+ and Zn2+ by Ulva lactuca fitted the Langmuir isotherm. Comparing with 0.1 M HCl, citric acid, thiourea, EDTA and HNO3, 0.1 M H2SO4 efficiently recovered close to 100% adsorbed metal ions from Ulva lactuca. In three successive adsorption-desorption cycles, reduction in metal ion RCs was found in the second and third cycles, but almost all adsorbed metal ion could be recovered.

Removal of Heavy Metal Ions with Hacac-Silica

2014 ◽  
Vol 901 ◽  
pp. 45-51
Author(s):  
Dan Feng Cui ◽  
Jian Zhuang Zhao ◽  
Yan Ying Zheng
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Metal Ion ◽  
Heavy Metal Ions ◽  
High Specific Surface Area ◽  
Metal Ion Removal ◽  
Ion Removal ◽  
Ultrasonic Technology ◽  
Heavy Metal Ion Removal

This paper presents a new decoration view functionalization of mesoporous silica to extend their applications to heavy metal ion removal. The study showed that Hacac can be incorporated into the structure through in-situ strategy, and the calcined Hacac-silica possesses advantages of high specific surface area of about 1496 m2/g and pore size of 4nm, ordered spheric morphology of about 300nm in diameter. Auxiliary by ultrasonic technology, the heavy metal ions remove rates are more than 95% for Pb2+, Cu2+ and Cr3+. More choice of chelating agents can be used for further functionalization of silica based mesoporous material.

Kinetic study of Heavy Metal ion removal through Hydrogels

2021 ◽  
Vol 25 (9) ◽  
pp. 127-132
Author(s):  
Anamica . ◽  
P.P. Pande
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Metal Ion ◽  
Heavy Metal Ion ◽  
Visible Absorption ◽  
Metal Ion Removal ◽  
Ion Removal ◽  
Metal Ion Adsorption ◽  
Heavy Metal Ion Removal ◽  
Removal Of Metal Ions

The crosslinkers allyl mannitol (AM), allyl sorbitol (AS) and allyl pentaerythritol (AP) have been used for the synthesis of crosslinked polymeric gels of acrylic acid. These gels were used for the removal of heavy metal ions from water. The quantitative removal of metal ions was determined with the support of UV-visible absorption spectroscopy. The results show that the fully dried hydrogel samples have better adsorption potential for heavy metal ion removal. The kinetics of metal ion adsorption during the treatment of wastewater has also been studied. It was found that under certain conditions, the kinetics involved may be of pseudo first order while under different set of conditions, the kinetics involved is of pseudo second order.

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