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You searched for: Subject adsorbents Remove constraint Subject: adsorbents Subject term cadmium Remove constraint Subject term: cadmium Subject term adsorbents Remove constraint Subject term: adsorbents
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1. A comparative analysis of the adsorption kinetics of Cu2+ and Cd2+ by the microalgae Chlorella vulgaris and Scenedesmus obliquus

Author:
James Hockaday; Adam Harvey; Sharon Velasquez-Orta
Source:
Algal research 2022 v.64 pp. 102710
ISSN:
2211-9264
Subject:
Chlorella vulgaris; Scenedesmus obliquus; adsorbents; adsorption; algorithms; biomass; cadmium; copper; heavy metals; industry; microalgae; models; research; sorption isotherms; water treatment
Abstract:
... The ability of microalgae to adsorb heavy metals from their environment has been well documented, with numerous previous studies documenting their metal binding ability. This ability has brought interest of the water treatment industry as metal removal to ppb concentrations is an expensive undertaking using conventional methods. To date, few researchers have focussed on the kinetics of adsorption, ...
DOI:
10.1016/j.algal.2022.102710

2. A comparative study of Cd(ii) adsorption on calcined raw attapulgite and calcined aluminium hydroxide-modified attapulgites in aqueous solution

Author:
Qinhu Zhang; Run Chu; Yuzhen Wei; Liqun Cai
Source:
RSC advances 2022 v.12 no.22 pp. 13695-13705
ISSN:
2046-2069
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; adsorbents; adsorption; aluminum; aqueous solutions; cadmium; comparative study; endothermy; heat production; ion exchange; pH; sorption isotherms; transmission electron microscopy
Abstract:
... In this study, raw attapulgite and two aluminium hydroxide-modified attapulgites prepared using different aluminium salts were calcined at 600 °C to successfully prepare three novel adsorbents (C-ATP, C-ATP-SO₄²⁻ and C-ATP-Cl⁻). The three adsorbents were characterized by transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), Brunauer–Emmett ...
DOI:
10.1039/d2ra00720g

3. A comprehensive study on aquatic chemistry, health risk and remediation techniques of cadmium in groundwater

Author:
Monika Mahajan; Pankaj Kumar Gupta; Anita Singh; Barkha Vaish; Pooja Singh; Richa Kothari; Rajeev Pratap Singh
Source:
Science of the total environment 2022 v.818 pp. 151784
ISSN:
0048-9697
Subject:
adsorbents; cadmium; databases; environment; food chain; groundwater; health hazards; human health; inorganic carbon; ionic strength; meta-analysis; metadata; pH; phytoaccumulation; pollution; public health; risk; trace elements; India; Nigeria
Abstract:
... Cadmium (Cd), a non-essential trace element, it's intrusion in groundwater has ubiquitous implications on the environment and human health. This review is an approach to comprehensively emphasize on i) chemistry and occurrence of Cd in groundwater and its concomitant response on human health ii) sustainable Cd remediation techniques, iii) and associated costs. Current study is depending on meta-an ...
DOI:
10.1016/j.scitotenv.2021.151784

4. A novel thiourea derivative for preconcentration of copper(II), nickel(II), cadmium(II), lead(II) and iron(II) from seawater samples for Flame Atomic Absorption Spectrophotometry

Author:
Şengül Şanlıer Uçak; Adnan Aydın
Source:
Marine pollution bulletin 2022 v.180 pp. 113787
ISSN:
0025-326X
Subject:
adsorbents; adsorption; atomic absorption spectrometry; cadmium; copper; iron; marine pollution; nickel; seawater; thiourea
Abstract:
... A novel adsorbent, 3-phenyl-1-(2-pyridyl)thiourea (PPTU) was synthesized and its adsorption capabilities were studied for Cu(II), Cd(II), Ni(II), Pb(II) and Fe(II) cations in the waters such as tap and polluted seawaters. The kinetics, Langmuir and Freundlich isotherms were discussed related to the adsorptions. The adsorption capacities of PPTU were found 9.4; 12.6; 90.9; 57.1 and 30.4 mg g⁻¹ and ...
DOI:
10.1016/j.marpolbul.2022.113787

5. Activated multi-walled carbon nanotubes decorated with zero valent nickel nanoparticles for arsenic, cadmium and lead adsorption from wastewater in a batch and continuous flow modes

Author:
Titus Chinedu Egbosiuba; Michael Chika Egwunyenga; Jimoh Oladejo Tijani; Saheed Mustapha; Ambali Saka Abdulkareem; Abdulsalami Sanni Kovo; Vida Krikstolaityte; Andrei Veksha; Michal Wagner; Grzegorz Lisak
Source:
Journal of hazardous materials 2022 v.423 pp. 126993
ISSN:
0304-3894
Subject:
adsorbents; adsorption; arsenic; cadmium; carbon nanotubes; electrostatic interactions; hydrophilicity; industrial wastewater; ion exchange; kinetics; lead; models; nanocomposites; nickel; remediation; sorption isotherms; surface area; wastewater treatment
Abstract:
... Nickel nanoparticles (NiNPs) supported on activated multi-walled carbon nanotubes (MWCNTs) were used as an adsorbent applied towards Pb(II), As(V) and Cd(II) remediation from industrial wastewater. The result revealed the hydrophilic surface of MWCNTs-KOH was enhanced with the incorporation of NiNPs enabling higher surface area, functional groups and pore distribution. Comparatively, the removal o ...
DOI:
10.1016/j.jhazmat.2021.126993

6. Adsorption of copper (II) and cadmium (II) ions by in situ doped nano-calcium carbonate high-intensity chitin hydrogels

Author:
Detian Dou; Donglai Wei; Xin Guan; Zhenjiang Liang; Lihong Lan; Xiongdiao Lan; Pengru Liu; Huiqun Mo; Ping Lan
Source:
Journal of hazardous materials 2022 v.423 pp. 127137
ISSN:
0304-3894
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; adsorbents; adsorption; cadmium; calcium carbonate; chelation; chitin; composite materials; copper; hydrogels; macropores; models; nitrogen; oxygen; pH; sorption isotherms; temperature
Abstract:
... Most natural polymers exhibit limited functional groups, which is not favourable for the adsorption of various ions and their utilisation. To overcome this drawback, a novel in-situ-doped nano-calcium carbonate (CaCO₃) chitin hydrogel was synthesised as an efficient adsorbent for Cu (II) and Cd (II) ions. Scanning electron microscopy and Brunauer–Emmett–Teller results revealed that the synthesised ...
DOI:
10.1016/j.jhazmat.2021.127137

7. Adsorption of heavy metals from the aqueous solution using activated biomass from Ulva flexuosa

Author:
R. Lekshmi; T.S. Rejinie Mon; Rengasamy Sathya; Palaniselvam Kuppusamy; Fahd A. AL-mekhlafi; Muhammad A. Wadaan; P. Rajendran
Source:
Chemosphere 2022 pp. 135479
ISSN:
0045-6535
Subject:
Ulva; absorption; adsorbents; adsorption; agitation; algae; aqueous solutions; biomass; biosorbents; biosorption; cadmium; cobalt; heavy metals; pH; toxicity; wastewater; zinc
Abstract:
... The removal of various highly toxic heavy metals from wastewater environment is an important task to improve environment. The biosorption potential of cadmium, cobalt and zinc was evaluated using Ulva flexuosa biomass. The impacts of adsorbent dosage, pH of the medium, contact time, and agitation speed were analyzed. The maximum biosorption potential was reached at pH 4.0, 0.4 g initial biosorbent ...
DOI:
10.1016/j.chemosphere.2022.135479

8. Adsorptive removal of lead and cadmium ions from aqueous solutions by aluminium oxide modified onion skin wastes: Adsorbent characterization, equilibrium modelling and kinetic studies

Author:
Adeyinka Sikiru Yusuff
Source:
Energy & environment 2022 v.33 no.1 pp. 152-169
ISSN:
2048-4070
Subject:
adsorbents; adsorption; aluminum oxide; cadmium; cations; energy; environment; heavy metals; lead; onions; pH; sorption isotherms; wastewater
Abstract:
... Aluminium oxide modified onion skin waste (Al₂O₃/OSW) was characterized and used for adsorption of metal ions (Pb²⁺ and Cd²⁺) in this study, and the relations between sorbent properties and metal ion sorption were investigated. The effects of adsorption process conditions on metal ion removal efficiency, including initial cation concentration, contact time, adsorbent dosage and pH, were examined. ...
DOI:
10.1177/0958305X21989886

9. Agricultural waste materials for adsorptive removal of phenols, chromium (VI) and cadmium (II) from wastewater: A review

Author:
Amina Othmani; Sara Magdouli; P. Senthil Kumar; Ashish Kapoor; Padmanaban Velayudhaperumal Chellam; Ömür Gökkuş
Source:
Environmental research 2022 v.204 pp. 111916
ISSN:
0013-9351
Subject:
adsorbents; agricultural wastes; cadmium; chromium; groundwater; polymers; research; wastewater
Abstract:
... Management of basic natural resources and the spent industrial and domestic streams to provide a sustainable safe environment for healthy living is a magnum challenge to scientists and environmentalists. The present remedial approach to the wastewater focuses on recovering pure water for reuse and converting the contaminants into a solid matrix for permanent land disposal. However, the ground wate ...
DOI:
10.1016/j.envres.2021.111916

10. An overview of microalgae for Cd2+ and Pb2+ biosorption from wastewater

Author:
O. Nateras-Ramírez; M.R. Martínez-Macias; D.I. Sánchez-Machado; J. López-Cervantes; R.J. Aguilar-Ruiz
Source:
Bioresource technology reports 2022 v.17 pp. 100932
ISSN:
2589-014X
Subject:
adsorbents; adsorption; biomass; biosorption; cadmium; heavy metals; ion exchange; microalgae; pH; sorption isotherms; technology; thermodynamics; toxicity; wastewater
Abstract:
... Lead (Pb²⁺) and cadmium (Cd²⁺) are the most toxic heavy metals that have been discharged into the environment. There is interest in new adsorbents capable of removing heavy metals. This review focuses on the use of microalgae as an alternative for removing Pb²⁺ and Cd²⁺. It was found that microalgae biomass has a higher affinity for the biosorption of Pb²⁺. The ion exchange was a main mechanism of ...
DOI:
10.1016/j.biteb.2021.100932

11. Application of superparamagnetic iron oxide nanoparticles (SPIONs) for heavy metal adsorption: A 10-year meta-analysis

Author:
Vamika Sharma; Harpreet Singh; Shikha Guleria; Neha Bhardwaj; Sanjeev Puri; Shailendra Kumar Arya; Madhu Khatri
Source:
Environmental nanotechnology, monitoring & management 2022 pp. 100716
ISSN:
2215-1532
Subject:
administrative management; adsorbents; adsorption; arsenic; cadmium; chromium; computers; copper; heavy metals; iron oxides; lead; mercury; meta-analysis; nickel; pH; remediation; systematic review; variance; water pollution; water treatment
Abstract:
... Water contamination with heavy metals has become a major concern in the present time, which necessitates the need for effective and flexible techniques for water remediation. During the last few years, superparamagnetic iron oxide nanoparticles (SPIONs) based adsorbents and their composites have gathered significant attention in their adsorption potential towards the heavy metal ions in an aqueous ...
DOI:
10.1016/j.enmm.2022.100716

12. Binary adsorption of chromium and cadmium metal ions by hemp (Cannabis sativa) based adsorbents

Author:
N.D. Shooto; P.M. Thabede
Source:
Environmental nanotechnology, monitoring & management 2022 v.18 pp. 100683
ISSN:
2215-1532
Subject:
Cannabis sativa; administrative management; adsorbents; adsorption; biocompatible materials; cadmium; cation exchange capacity; cellulose; chromium; hemp; models; surface area
Abstract:
... Hexavalent chromium Cr(VI) and divalent cadmium Cd(II) are among the most dangerous metal ions in aqueous solutions. The removal of Cr(VI) and Cd(II) from aqueous media requires serious attention. This study reports on the potential of adsorbents produced from hemp seeds to simultaneously remove Cr(VI) and Cd(II) from a synthetic aquatic medium. Pristine hemp seeds (PHS) were carbonized to obtain ...
DOI:
10.1016/j.enmm.2022.100683

13. Biocompatible self-healing hydrogels based on boronic acid-functionalized polymer and laponite nanocomposite for water pollutant removal

Author:
Xue-Ting Wang; Xudong Deng; Tuo-Di Zhang; Xi Zhang; Wen-Pu Shi; Jialiang Lai; Hongwei Zhou; Ya-Jing Ye; Chen-Yan Zhang; Da-Chuan Yin
Source:
Environmental chemistry letters 2022 v.20 no.1 pp. 81-90
ISSN:
1610-3653
Subject:
adsorbents; adsorption; biocompatibility; cadmium; copper; hydrogels; laponite; malachite green; methylene blue; nanocomposites; pollution control; polyacrylic acid; strength (mechanics); water pollution
Abstract:
... Global water pollution by organic dyes and metals may be solved by adsorption. In particular, hydrogel adsorbents display unique advantages due to their three-dimensional porous structure. Here, a new type of self-healing hydrogels based on boronate and amide bonds were prepared. The precursor polymer, 2-aminophenylboronic acid-modified polyacrylic acid (PAA-2APBA), was firstly synthesized by amid ...
DOI:
10.1007/s10311-021-01350-4

14. Cadmium immobilization in lake sediment using different crystallographic manganese oxides: Performance and mechanism

Author:
Changsheng Jin; Zhongwu Li; Mei Huang; Xiang Ding; Mi Zhou; Changqing Cai; Jia Chen
Source:
Journal of environmental management 2022 v.313 pp. 114995
ISSN:
0301-4797
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; adsorbents; bioavailability; cadmium; carbonates; human health; ion exchange; lakes; manganese; pH; pollution; redox potential; remediation; sediments; toxicity; wastewater
Abstract:
... Cd pollution in sediments poses severe threats to environmental safety and human health. Mn oxides have potential merit for the remediation of Cd pollution in sediment but have not received enough attention. Although Mn oxides have proven effective as adsorbents for removing heavy metals from water/wastewater, the performance and the underlying mechanism of Cd immobilization in sediments by Mn oxi ...
DOI:
10.1016/j.jenvman.2022.114995

15. Cadmium ion removal from aqueous media using banana peel biochar/Fe3O4/ZIF-67

Author:
Rauf Foroutan; Seyed Jamaleddin Peighambardoust; Reza Mohammadi; Seyed Hadi Peighambardoust; Bahman Ramavandi
Source:
Environmental research 2022 v.211 pp. 113020
ISSN:
0013-9351
Subject:
adsorbents; adsorption; banana peels; biochar; cadmium; heat production; kinetics; magnetism; nanocomposites; pH; research; temperature; wastes
Abstract:
... In the present study, banana peel waste was used as a suitable source for biochar production. The banana peel biochar (BPB) was modified using Fe₃O₄ magnetic and ZIF-67 nanoparticles. The modification of the BPB surface (4.70 m²/g) with Fe₃O₄ and Fe₃O₄/ZIF-67 significantly increased the specific surface of the nanocomposites (BPB/Fe₃O₄: 78.83 m²/g, and BPB/Fe₃O₄/ZIF-67: 1212.40 m²/g). The effect o ...
DOI:
10.1016/j.envres.2022.113020

16. Clay honeycomb monoliths for the simultaneous retention of lead and cadmium in water

Author:
Mohammadi Ahrouch; José Manuel Gatica; Khalid Draoui; Dolores Bellido-Milla; Hilario Vidal
Source:
Environmental technology & innovation 2022 pp. 102765
ISSN:
2352-1864
Subject:
Fourier transform infrared spectroscopy; adsorbents; adsorption; cadmium; cation exchange capacity; environmental technology; lead; sorption isotherms; surface area; wastewater; water treatment
Abstract:
... Natural illite-smectite and stevensite Moroccan clays were used for the simultaneous removal of lead and cadmium from aqueous medium. The clays were employed in raw state and extruded as honeycomb monoliths form without any additives, which confirms the novelty of this approach in water treatment. The experiments were done in batch conditions with continuous stirring and using a recirculated flow, ...
DOI:
10.1016/j.eti.2022.102765

17. Comparative study of the elimination of copper, cadmium, and methylene blue from water by adsorption on the citrus Sinensis peel and its activated carbon

Author:
Wassim El Malti; Akram Hijazi; Zahraa Abou Khalil; Zahraa Yaghi; Mohamad Kazem Medlej; Mohamad Reda
Source:
RSC advances 2022 v.12 no.17 pp. 10186-10197
ISSN:
2046-2069
Subject:
Citrus sinensis; activated carbon; adsorbents; adsorption; agricultural wastes; biomass; cadmium; comparative study; copper; cost effectiveness; methylene blue; pH; sorption isotherms; temperature; wastewater
Abstract:
... The accumulation of heavy metals and dyes in wastewater is a persistent environmental threat with serious hazards consequences affecting all living organisms. Their removal has become a challenging environmental requirement. Adsorption using agricultural waste is one of the cost-effective removal techniques in which the biomass can be valorized. In this study, two adsorbents were prepared and comp ...
DOI:
10.1039/d1ra08997h

18. Computer simulation modelling of the simultaneous adsorption of Cd, Cu and Cr from aqueous solutions by agricultural clay soil: A PHREEQC geochemical modelling code coupled to parameter estimation (PEST) study

Author:
Alseno K. Mosai; Bontle C. Tokwana; Hlanganani Tutu
Source:
Ecological modelling 2022 v.465 pp. 109872
ISSN:
0304-3800
Subject:
adsorbents; adsorption; agricultural soils; cadmium; chromium; clay soils; computer simulation; copper; environmental sustainability; gold; groundwater; pH; platinum; remediation; surface water; toxicity; wastewater
Abstract:
... Although minerals such as gold and platinum are important for improving life, their processing comes with social and environmental problems. During the processing of these minerals, toxic elements such as cadmium, copper and chromium are released along with wastewater into the environment including soils and surface water leading to plausible migration to groundwater. The removal of these elements ...
DOI:
10.1016/j.ecolmodel.2022.109872

19. Effective response of multiple kinetic models and DFT calculations to the ultrafast adsorption behaviors of cellulose-titanium dioxide composites

Author:
Qianya Zhou; Tao Zhang; Yaoming Su; Liuchun Zheng; Hao Zeng; Jingjing Ren; Huajian Yu; Peipei Meng
Source:
Industrial crops and products 2022 v.178 pp. 114673
ISSN:
0926-6690
Subject:
adsorbents; adsorption; cadmium; empirical models; ion exchange; mass transfer; oxygen
Abstract:
... A cellulose-polyacrylic acid-TiO₂ composite (CAT) with multiple carboxyl groups in the network structure and that could undergo ultrafast adsorption was successfully synthesized, and the adsorption capacity for cadmium(II) (Cd(II)) under optimal conditions was as high as 105 mg/g within 5 min. Additionally, CAT maintained the advantages of fast and efficient adsorption even when the concentrations ...
DOI:
10.1016/j.indcrop.2022.114673

20. Electrosorption of cadmium and arsenic from wastewaters using nitrogen-doped biochar: Mechanism and application

Author:
Shiwei Lin; Xiong Yang; Lihu Liu; Anyu Li; Guohong Qiu
Source:
Journal of environmental management 2022 v.301 pp. 113921
ISSN:
0301-4797
Subject:
adsorbents; adsorption; arsenic; biochar; cadmium; electric potential difference; electrochemistry; environmental management; heavy metals; nitrogen; nitrogen content; sodium bicarbonate; sodium humate; surface area; temperature; urea; wastewater
Abstract:
... Biochar has been widely applied as an adsorbent, whose electrochemical capacity and heavy metal adsorption performance can be improved by nitrogen doping. In this work, nitrogen-doped biochar (NBC) was synthesized by calcinating sodium humate with sodium bicarbonate (NaHCO₃) and urea as the activation agent and nitrogen source, respectively. The NBC was then used to electrochemically adsorb Cd(II) ...
DOI:
10.1016/j.jenvman.2021.113921