Extraction of Heavy Metal Ions from Water Using the Phosphorylated Carbon Sorbent Based on Natural Raw Material

It is proposed to use a sorbent based on polyurethane foam and natural raw material chitosan for water purification from oil pollution. Traditionally, chitosan and materials with its use are mainly used as purifiers of water and other media from heavy metal ions. This paper provides information on the use of chitosan, which is preliminary isolated from the waste from processing f various beetles, dead bees, etc. Sorbent synthesis occurs by mixing the components of polyurethane foam and chitosan in a very short time, which allows you to produce and use it directly on site.

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Synthesis and Characterization of Carbon/Bentonite Composite

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.549.703 ◽

2012 ◽

Vol 549 ◽

pp. 703-706

Author(s):

De Yi Zhang ◽

Jing Wu ◽

Bai Yi Chen ◽

He Ming Luo ◽

Kun Jie Wang ◽

...

Keyword(s):

Heavy Metal ◽

Activated Carbon ◽

Metal Ions ◽

Adsorption Capacity ◽

Heavy Metal Ions ◽

Low Cost ◽

Raw Material ◽

Hydroxyl Groups ◽

Carbon Particles ◽

Prepared Composite

In this paper, a novel carbon/bentonite composite was prepared using sucrose as carbon source and bentonite as raw material. The characterization results shown that plenty of carbon particles distribute on the surface of the composite, and an abundant of functional groups, such as SO3H, carboxylic and hydroxyl groups, were successfully introduced onto the surface of the prepared composite. The adsorption capacity of the prepared composite for typical heavy metal ions and methylene blue deys also was investigated and compared with activated carbon and bentonite, the results show that the composite shows excellent adsorprion performance for heavy metal ions, and the adsorption capacity for Cu2+and Ni2+ increase by 136% and 591% than natural bentonite, respectSuperscript textively. The prepared composite with excellent adsorption performance could be used as a low-cost alternative to activated carbon for the treatment of heavy metal ions polluted wastewater.

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Biochars from Lignin-rich Residue of Furfural Manufacturing Process for Heavy Metal Ions Remediation

Materials ◽

10.3390/ma13051037 ◽

2020 ◽

Vol 13 (5) ◽

pp. 1037 ◽

Cited By ~ 3

Author(s):

Baobin Wang ◽

Miao Ran ◽

Guigan Fang ◽

Ting Wu ◽

Yonghao Ni

Keyword(s):

Heavy Metal ◽

Metal Ions ◽

Manufacturing Process ◽

Metal Ion ◽

Heavy Metal Ions ◽

Hydrothermal Carbonization ◽

Raw Material ◽

Metal Ion Removal ◽

Heavy Metal Ion Removal ◽

Kinetics And Isotherms

The pentose/furfural industrial manufacturing process uses corn cob residue as a raw material, where such a process yields significant amount of lignin-rich residue (LCR) at the end, which is commonly disposed by burning. In this study, the conversion of LCR to biochars (BCs), and their subsequent applications for heavy metal ion removal, were investigated. The BCs were prepared through hydrothermal carbonization and post-activation, using either ZnCl2 or H3PO4 treatment. The as-prepared activated BCs were characterized using N2 adsorption–desorption isotherms, XRD, FT-IR, SEM and TEM, and their performance in removing heavy metal ions (Pb2+, Cu2+, Cd2+) from aqueous solutions was assessed. The ZnCl2-activated BCs (BC-ZnCl2) exhibit a higher adsorption capacity than the H3PO4-activated BCs (BC-H3PO4), mainly due to the differences in their chemical/physical characteristics. The related adsorption kinetics and isotherms were analyzed.

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Study on the Adsorption Effect of Renewable Biochar Based on Energy Gain

Geofluids ◽

10.1155/2021/5945398 ◽

2021 ◽

Vol 2021 ◽

pp. 1-16

Author(s):

Zhanghang Yang ◽

Qixiang Xu ◽

Ruiqin Zhang ◽

Qianming Huang ◽

Mingxin Liu

Keyword(s):

Heavy Metal ◽

Metal Ions ◽

Heavy Metal Ions ◽

Raw Material ◽

Sufficient Evidence ◽

Distinct Advantage ◽

Environment Friendly ◽

Adsorption Effect ◽

Low Temperature Pyrolysis ◽

Adsorption Desorption

This paper provides sufficient evidence on how the crop-residual-derived charcoal could effectively restore the soil polluted by the heavy metal. In this paper, straw char at three temperatures of 300°C, 500°C, and 700°C, labeled as RS300, RS500, and RS700, was prepared by low temperature pyrolysis technique using straw as raw material, and the competitive adsorption desorption of Pb2+, Cd2+, Cu2+, and Zn2+ in acidic solution and the mechanism were investigated by static adsorption experiments. Since the crop-residual-derived charcoal could effectively restore the nutritional structure of the soil, which contributes to preventing the decrease in grain yield, and it is also a kind of renewable environment-friendly resource by itself, which could be used in control the pollution of heavy metal ions, it is expected that the crop-residual-derived charcoal will be a new adsorption material that could be used to control the heavy metal pollution in the future; the adsorption effect of biochar as new adsorption material on heavy metal ions has a distinct advantage over traditional adsorbent materials, and biochar is a renewable energy source, which is cheap and better for recycling resources.

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Use of Chemically Treated Human Hair Wastes for the Removal of Heavy Metal Ions from Water

Water ◽

10.3390/w12051263 ◽

2020 ◽

Vol 12 (5) ◽

pp. 1263

Author(s):

Helan Zhang ◽

Fernando Carrillo-Navarrete ◽

Montserrat López-Mesas ◽

Cristina Palet

Keyword(s):

Heavy Metal ◽

Metal Ions ◽

Human Hair ◽

Heavy Metal Ions ◽

Low Cost ◽

Waste Product ◽

Raw Material ◽

Order Kinetic ◽

Biosorption Process ◽

Equilibrium Data

Human hair is considered a ubiquitous waste product and its accumulation can cause environmental problems. Hence, the search for alternatives that take advantage of this waste as a new raw material is of interest, and contributes to the idea of the circular economy. In this study, chemically modified human hair was used as a low cost biosorbent for the removal of heavy metal ions from aqueous solutions. The effect of the contact time, the pH, and the biosorbent concentration on the biosorption process were investigated. Kinetic modeling indicated that the pseudo-second order kinetic equation fitted well with R2 > 0.999. Furthermore, the equilibrium data fitted the Langmuir adsorption isotherm at 295 K resulting in saturation concentrations of 9.47 × 10−5, 5.57 × 10−5, 3.77 × 10−5, and 3.61 × 10−5 mol/g for the sorption of Cr(III), Cu(II), Cd(II), and Pb(II), respectively. The biosorption process did not change the chemical structure and morphology of the hair, which was shown by FTIR and SEM. In addition, desorption experiments prove that 0.1 mol/L EDTA solution is an efficient eluent for the recovery of Pb(II) from the treated human hair. To summarize, treated human hair showed satisfactory biosorption capacity and can be considered as an effective biosorbent for the treatment of water with a low concentration of heavy metal ions.

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Study on the Mechanical Properties and Heavy Metal Ions Immobilization Capability of Solidified Body for MSWI Fly Ash with Geopolymer

Materials Science Forum ◽

10.4028/www.scientific.net/msf.1036.301 ◽

2021 ◽

Vol 1036 ◽

pp. 301-308

Author(s):

Qing Wang ◽

Xin Rui Wang ◽

Hai Cao ◽

Zhao Yang Ding ◽

De Yong Kong

Keyword(s):

Heavy Metal ◽

Compressive Strength ◽

Fly Ash ◽

Metal Ions ◽

Heavy Metal Ions ◽

Waste Incineration ◽

Raw Material ◽

Polymerization Reaction ◽

Mswi Fly Ash ◽

Solidified Body

In this study, municipal solid waste incineration fly ash (hereinafter called MSWI fly ash) was used as a main raw material, and it was prepared into a solidified body for MSWI fly ash with geopolymer by a single-component chemical alkali excitation method. The results were shown that when the content of MSWI fly ash was 50%, SiO2/Al2O3 was between 3.51-4.04, and Na2O/Al2O3 was between 0.24-0.30, with the increasing of SiO2/Al2O3 and Na2O/Al2O3, the 28d compressive strength of the solidified body showed a trend of increasing first and then decreasing, the maximum 28d compressive strength was 17.7MPa. When SiO2/Al2O3 was 4.04 and Na2O/Al2O3 was 0.30, the minimum leaching concentrations of Pb2+ and Cd2+ were 0.018mg/L and 0.027 mg/L. When the content of MSWI fly ash was increasing, the 28d compressive strength of the solidified body gradually decreased, and the heavy metal ions leaching concentration gradually increased. The result of XRD and FTIR indicated that the MSWI fly ash was involved in the polymerization reaction, and the heavy metal ions in MSWI fly ash were also chemically solidified into the geopolymer structure.

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Preparation and Characterisation of Sulfonic Acid-Functionalized Carbon/Loess Composite

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.194-196.1652 ◽

2011 ◽

Vol 194-196 ◽

pp. 1652-1655 ◽

Cited By ~ 2

Author(s):

De Yi Zhang ◽

Ying Ma ◽

Yi Wang ◽

Hui Xia Feng ◽

Jiao Chen ◽

...

Keyword(s):

Heavy Metal ◽

Activated Carbon ◽

Metal Ions ◽

Adsorption Capacity ◽

Sulfonic Acid ◽

Heavy Metal Ions ◽

Low Cost ◽

Raw Material ◽

Carbon Particles ◽

Prepared Composite

In this paper, a novel sulfonic acid-functionalized carbon/loess composite was prepared using sucrose as carbon source and loess as raw material. The characterization results shown that plenty of carbon particles distribute on the surface of the composite, and an abundant of SO3H groups were successfully introduced onto the surface of the prepared composite through incomplete carbonization of sucrose and sulfonation of carbon particles. The adsorption capacity of the prepared composite for typical heavy metal ions also was investigated and compared with activated carbon, the results show that the composite shows excellent adsorprion performance, and the adsorption capacity for Fe3+, Pb2+, Cu2+, Cd2+, Ni2+can reach about 412%, 249%, 153%, 134% and 120% of the capacity of activated carbon, respectively. The prepared composite with excellent adsorption performance could be used as a low-cost alternative to activated carbon for the removal of heavy metal ions from wastewater.

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Applicability of the modified diatomite for treatment of wastewater containing heavy metals

E3S Web of Conferences ◽

10.1051/e3sconf/202124701052 ◽

2021 ◽

Vol 247 ◽

pp. 01052

Author(s):

Dmitry Boriskov ◽

Sanya Efremova ◽

Nadezhda Komarova ◽

Elena Tikhomirova ◽

Aleksey Bodrov

Keyword(s):

Heavy Metals ◽

Heavy Metal ◽

Chemical Modification ◽

Metal Ions ◽

Heavy Metal Ions ◽

Copper Ions ◽

Raw Material ◽

Wastewater Purification ◽

Physical And Chemical ◽

Modified Sorbents

The paper studies various modifications of diatomite, aiming at creating sorbents for wastewater purification from heavy metal ions. Diatomite of the Akhmatovskoe deposit of the Penza region was considered as a raw material. The processes of physical and chemical modification of diatomite were investigated. Adsorption isotherms were constructed, quantitative characteristics of adsorption of copper ions on the surface of modified sorbents were obtained. A chemical modification (acidic and alkaline) is proposed, which results in an increased adsorption capacity for heavy metal ions. The applicability of diatomite for the purification of highly concentrated wastewater containing heavy metals is shown.

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