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1. Construction of MoS2 nanoarrays and MoO3 nanobelts: Two efficient adsorbents for removal of Pb(II), Au(III) and Methylene Blue

Author:
Zhou, Wen; Deng, Jiale; Qin, Zhen; Huang, Ruihua; Wang, Yi; Tong, Shanshan
Source:
Journal of environmental sciences (China) 2022 v.111 pp. 38-50
ISSN:
1001-0742
Subject:
heavy metals,   etc   ; adsorbents; adsorption; endothermy; methylene blue; thermodynamics; toxicity; wastewater treatment; China;     Show all 9 Subjects
Abstract:
... Toxic heavy metal ions, valuable noble metal ions and organic dyes are significant concerns in wastewater treatment. In this work, MoO₃ nanobelts (MoO₃ NBs) prepared by solvothermal method and MoS₂ nanoarrays (MoS₂ NAs) constructed using MoO₃ NBs precursor were proposed to effectively remove heavy/noble metal ions and organic dyes, such as Pb⁽ᴵᴵ⁾, Au⁽ᴵᴵᴵ⁾ and Methylene Blue (MB). The two adsorbent ...
DOI:
10.1016/j.jes.2021.02.031

2. Threshold dose rates for the cytogenetic effects in crested hairgrass populations from the Semipalatinsk nuclear test site, Kazakhstan

Author:
Geras’kin, Stanislav; Minkenova, Kyrmyzy; Perevolotsky, Alexandr; Baigazinov, Zhanat; Perevolotskaya, Tatiana
Source:
Journal of hazardous materials 2021 v.416 pp. 125817
ISSN:
0304-3894
Subject:
heavy metals,   etc   ; Koeleria macrantha; mitosis; pollution; Kazakhstan;     Show all 5 Subjects
Abstract:
... An assessment of cytogenetic effects in crested hairgrass (Koeleria gracilis Pers.) populations was carried out within the Semipalatinsk nuclear test site (Kazakhstan) where combat radioactive substances were tested in 1953–1957. Current levels of radioactive contamination within this site are varied by orders of magnitude, while soil characteristics and heavy metal pollution are similar. The main ...
DOI:
10.1016/j.jhazmat.2021.125817

3. One-step extraction of high-purity CuCl2·2H2O from copper-containing electroplating sludge based on the directional phase conversion

Author:
Yu, Yao; Huang, Qiuyun; Zhou, Jin; Wu, Zhen; Deng, Hong; Liu, Xueming; Lin, Zhang
Source:
Journal of hazardous materials 2021 v.413 pp. 125469
ISSN:
0304-3894
Subject:
heavy metals,   etc   ; chlorination; copper; equations; sludge; volatilization;     Show all 6 Subjects
Abstract:
... The recovery of heavy metals is a vital way to turn electroplating sludge into resources and reduce its environmental hazards. However, the complex compositions of the polymetallic electroplating sludge severely limit the selective recovery of metal resources such as copper. In this study, we took a kind of copper-containing electroplating sludge (C-ES) as an example present and investigated the p ...
DOI:
10.1016/j.jhazmat.2021.125469

4. Rationally engineered nanosensors: A novel strategy for the detection of heavy metal ions in the environment

Author:
Numan, Arshid; Gill, Atal A.S.; Rafique, Saqib; Guduri, Manisha; Zhan, Yiqiang; Maddiboyina, Balaji; Li, Lijie; Singh, Sima; Nguyen Dang, Nam
Source:
Journal of hazardous materials 2021 v.409 pp. 124493
ISSN:
0304-3894
Subject:
heavy metals,   etc   ; electrochemistry; sensors (equipment); toxicity;     Show all 4 Subjects
Abstract:
... Heavy metal ions (HMIs) have been mainly originated from natural and anthropogenic agents. It has become one of biggest societal issues due to their recognised accumulative and toxic effects in the environment as well as biological media. Key measures are required to reduce the risks posed by toxic metal pollutants existing in the environment. The increased research activities of HMIs detection, a ...
DOI:
10.1016/j.jhazmat.2020.124493

5. Recent developments in layer-by-layer assembled systems application in water purification

Author:
Ghiorghita, Claudiu-Augustin; Mihai, Marcela
Source:
Chemosphere 2021 v.270 pp. 129477
ISSN:
0045-6535
Subject:
heavy metals,   etc   ; desalination; sorbents; water purification;     Show all 4 Subjects
Abstract:
... Electrostatically-based layer-by-layer (LbL) assembly is a versatile surface functionalization technique allowing the construction of complex three-dimensional architectures on virtually any type of material using various combinations of nano-bricks. One of the most promising applications of LbL assembled systems is in water purification. The main two strategies developed in this purpose consist i ...
DOI:
10.1016/j.chemosphere.2020.129477

6. Development of a nanoscale electroless plating procedure for bismuth and its application in template-assisted nanotube fabrication

Author:
Scheuerlein, Martin Christoph; Ensinger, Wolfgang
Source:
RSC advances 2021 v.11 no.15 pp. 8636-8642
ISSN:
2046-2069
Subject:
heavy metals,   etc   ; bismuth; dimethylamine; nanotubes; surface area;     Show all 5 Subjects
Abstract:
... Electroless plating is a versatile technique for the facile and controlled synthesis of metallic thin films and nanostructures. While there are numerous known procedures involving transition metals, reports on the electroless plating of post-transition metals are particularly rare, even without considering specific nanofabrication requirements. In this work we outline the development of a remarkab ...
DOI:
10.1039/d1ra00978h

7. Charge transfer complexes: Emerging and promising colorimetric real-time chemosensors for hazardous materials

Author:
Shakya, Sonam; Khan, Ishaat M.
Source:
Journal of hazardous materials 2021 v.403 pp. 123537
ISSN:
0304-3894
Subject:
heavy metals,   etc   ; DNA; colorimetry; explosives; photocatalysis; toxicity;     Show all 6 Subjects
Abstract:
... After introducing the concept of charge transfer (CT) complex formation by Mulliken and the discovery of crystalline picrate (association of picric acid and aromatic hydrocarbons) by Fritzsches, a large interest has been drawn in this field. CT complexes have been explored and exploited for different applications for several decades. The research has been aimed mostly for discovering and character ...
DOI:
10.1016/j.jhazmat.2020.123537

8. Quantifying wind-induced impacts on particulate Cu footprint in the Yangtze Estuary

Author:
Yichuan, Zeng; Hua, Wang; Dongfang, Liang; Weihao, Yuan; Bao, Li; Wei, Zhuang; Kaisam, John Paul; Wenbo, Shen
Source:
Chemosphere 2021 v.264 pp. 128426
ISSN:
0045-6535
Subject:
heavy metals,   etc   ; estuaries; pollution; sewage; wind speed;     Show all 5 Subjects
Abstract:
... Under two wind conditions, a polar coordinated segmented quantification method (PCSQM) taking the easternmost point of Chongming Island (121°59′20″E, 31°29′38″N) as the origin of the coordinate was proposed to quantify wind-induced impacts on the heavy metal footprint emitted from four simulation sites on the main waterway of the Yangtze Estuary. One wind condition was that of a real wind field in ...
DOI:
10.1016/j.chemosphere.2020.128426

9. Concentration of heavy metals in street dust: an implication of using different geochemical background data in estimating the level of heavy metal pollution

Author:
Dytłow, Sylwia; Górka-Kostrubiec, Beata
Source:
Environmental geochemistry and health 2021 v.43 no.1 pp. 521-535
ISSN:
0269-4042
Subject:
heavy metals,   etc   ; dust; geochemistry; pollution; Poland;     Show all 5 Subjects
Abstract:
... Geochemical background data are used to distinguish between the sources of heavy metal (natural or anthropogenic) and to categorize the level of heavy metal pollution. In this study, we present the results of using different geochemical backgrounds (BG1–BG3) to establish the level of heavy metal pollution in street dust in Warsaw, Poland. We applied individual and collective indicators calculated ...
DOI:
10.1007/s10653-020-00726-9

10. Optimization of Growth Conditions of Acinetobacter sp. Cr1 for Removal of Heavy Metal Cr Using Central Composite Design

Author:
Pang, Bingbing; Lv, Lijun; Pang, Caoping; Ye, Fengcai; Shang, Changhua
Source:
Current microbiology 2021 v.78 no.1 pp. 316-322
ISSN:
0343-8651
Subject:
heavy metals,   etc   ; Acinetobacter; bioremediation; nucleotide sequences; pH;     Show all 5 Subjects
Abstract:
... Growth conditions can significantly affect the removal efficiency of heavy metals by microorganisms. The goal of this study was enhancing the removal efficiency of Cr(VI) and improving the application of Acinetobacter sp. Cr1 (GenBank accession number of 16S rDNA sequence, MN900681). This study focused on pH, Cr(VI) concentration and culture time, which were the major influence factors for removal ...
DOI:
10.1007/s00284-020-02278-8

11. Cytogenetic Effects in Crested Hairgrass from a Site Where Tests of Military Radioactive Substances Were Conducted at the Semipalatinsk Test Site

Author:
Minkenova, K. S.; Baigazinov, Z. A.; Geras’kin, S. A.; Perevolotsky, A. N.
Source:
Biology bulletin of the Russian Academy of Sciences 2020 v.47 no.12 pp. 1637-1650
ISSN:
1062-3590
Subject:
heavy metals,   etc   ; irradiation; Kazakhstan;     Show all 3 Subjects
Abstract:
... The estimation of cytogenetic effects in the crested hairgrass was conducted in 38 areas of the site “4A” of Semipalatinsk test site (Kazakhstan) that do not differ in soil characteristics and heavy metal contamination, but contrast in the level of radioactive contamination. In 1953–1957, military radioactive substances were tested at the site “4A.” Dose loads on the plants at this site vary in th ...
DOI:
10.1134/S1062359020120067

12. Heavy metal removal from aqueous solutions by chitosan-based magnetic composite flocculants

Author:
Xiao, Xuefeng; Yu, Yuanyuan; Sun, Yongjun; Zheng, Xing; Chen, Aowen
Source:
Journal of environmental sciences (China) 2021 v.108 pp. 22-32
ISSN:
1001-0742
Subject:
heavy metals,   etc   ; chitosan; flocculants; flocculation; magnetic fields; pH; wastewater; China;     Show all 8 Subjects
Abstract:
... In this study, three magnetic flocculants with different chelating groups, namely, carboxymethyl chitosan-modified Fe₃O₄ flocculant (MC), acrylamide-grafted magnetic carboxymethyl chitosan flocculant (MCM), and 2-acrylamide-2-methylpropanesulfonic acid copolyacrylamide-grafted magnetic carboxymethyl chitosan flocculant (MCAA) were prepared, synthesized, and characterized by photopolymerization tec ...
DOI:
10.1016/j.jes.2021.02.014

13. A ‘top modification’ strategy for enhancing the ability of a chitosan aerogel to efficiently capture heavy metal ions

Author:
Li, Shize; Li, Yaping; Fu, Zi; Lu, Lingbin; Cheng, Jingru; Fei, Yongsheng
Source:
Journal of colloid and interface science 2021 v.594 pp. 141-149
ISSN:
0021-9797
Subject:
heavy metals,   etc   ; adsorbents; adsorption; aerogels; anhydrides; chitosan; crosslinking; ethylenediamines;     Show all 8 Subjects
Abstract:
... Chitosan is a promising substitute for heavy metal ion adsorbents. However, traditional pure chitosan adsorbents have certain disadvantages that limit their application. In this paper, a ‘top modification’ strategy was used to enhance the capturing ability of chitosan adsorbents. A chitosan aerogel was prepared via physical crosslinking and then enhanced by immersion in ethylenediamine tetraacetic ...
DOI:
10.1016/j.jcis.2021.03.029

14. Removal of heavy metal ions and polybrominated biphenyl ethers by sulfurized nanoscale zerovalent iron: Compound effects and removal mechanism

Author:
Wei, Xipeng; Guo, Zhanyu; Yin, Hua; Yuan, Yibo; Chen, Ruxia; Lu, Guining; Dang, Zhi
Source:
Journal of hazardous materials 2021 v.414 pp. 125555
ISSN:
0304-3894
Subject:
heavy metals,   etc   ; biphenyl; decabromodiphenyl ether; electron transfer; hydrogen; iron;     Show all 6 Subjects
Abstract:
... Sulfurized nanoscale zerovalent iron (S-nZVI) has been widely reported to be able to quickly remove heavy metals/persistent organic pollutants, but the limited understanding of the complicated removal process of heavy metals-organic combined pollutants restricts the application of S-nZVI. Here, we demonstrate that there is significant difference in the effectiveness of S-nZVI for removing single p ...
DOI:
10.1016/j.jhazmat.2021.125555

15. Assessing the influence of pore structure formation on heavy metal immobilization through image-based CFD

Author:
Wang, Mingzhi; Liu, Yushi; Qi, Beimeng; Al-Tabbaa, Abir; Wang, Wei
Source:
Chemosphere 2021 v.275 pp. 129997
ISSN:
0045-6535
Subject:
heavy metals,   etc   ; fluid mechanics; landscapes; porosity; sorbents; surface area;     Show all 6 Subjects
Abstract:
... Porous media are widely adopted as immobilization sorbents in environmental engineering. The microscale difference in pore structure formation causes significant deflection in a vast landscape. Computational fluid dynamics (CFD) offers a comparative approach to evaluate the individual influence from pore structure formation with strictly controlled surface and volume properties. This paper present ...
DOI:
10.1016/j.chemosphere.2021.129997

16. The transport of silica powders and lead ions under unsteady flow and variable injection concentrations

Author:
Bai, Bing; Jiang, Sichen; Liu, Lulu; Li, Xu; Wu, Haiyan
Source:
Powder technology 2021 v.387 pp. 22-30
ISSN:
0032-5910
Subject:
heavy metals,   etc   ; lead; seepage; silica; soil; technology; transient flow;     Show all 7 Subjects
Abstract:
... The transport of silica powders (SPs), which are a type of suspended particles, and lead ions (a heavy metal species) in saturated porous media under unsteady flow and variable lead ion injection concentrations was investigated. During the transport of lead ions alone, the lead ion concentration in the effluent was almost constant during the entire penetration process; i.e., the transport of lead ...
DOI:
10.1016/j.powtec.2021.04.014

17. Spatial characteristics of ecological and health risks of toxic heavy metal pollution from road dust in the Black Sea coast of Turkey

Author:
Yesilkanat, Cafer Mert; Kobya, Yasar
Source:
Geoderma regional 2021 v.25 pp. e00388
ISSN:
2352-0094
Subject:
heavy metals,   etc   ; carcinogenicity; coasts; dust; pollution load; risk; Black Sea;     Show all 7 Subjects
Abstract:
... The purpose of this study was to investigate the toxic heavy metal (Cd, Cr, Cu, Ni, Pb, Zn) concentrations of dust samples from the Black Sea coastal road in the north of Turkey. The Black Sea coastal road was represented by 50 sampling sites. The highest average concentrations were identified in Ordu for Cd (0.4 mg kg⁻¹), Cu (132 mg kg⁻¹), and Zn (457 mg kg⁻¹), Samsun for Cr (59 mg kg⁻¹) and Ni ( ...
DOI:
10.1016/j.geodrs.2021.e00388

18. Metal selectivity and effects of co-existing ions on the removal of Cd, Cu, Ni, and Cr by ZIF-8-EGCG nanoparticles

Author:
Wen, Jia; Hu, Xiaohong
Source:
Journal of colloid and interface science 2021 v.589 pp. 578-586
ISSN:
0021-9797
Subject:
heavy metals,   etc   ; adsorption; calcium; epigallocatechin gallate; kinetics; sorption isotherms;     Show all 6 Subjects
Abstract:
... Recently, the developments of MOFs and their applications on heavy metal removal have attracted much attention. In this paper, we focused on the influence of co-existing ions on the adsorbability of epigallocatechin gallate (EGCG) modified ZIF-8 in a multi-metal system (Cd(II), Cu(II), Ni(II), and Cr(VI)). It was found that the adsorption of Cd(II), Cu(II), Ni(II), and Cr(VI) on the ZIF-8-EGCG fit ...
DOI:
10.1016/j.jcis.2021.01.021

19. Close band center and rapid adsorption kinetics facilitate selective electrochemical sensing of heavy metal ions

Author:
Song, Zong-Yin; Li, Pei-Hua; Yang, Meng; Chen, Shi-Hua; Xiao, Xiang-Yu; Duan, Wanchun; Lin, Chu-Hong; Huang, Xing-Jiu
Source:
Chemical communications 2021 v.57 no.31 pp. 3820-3823
ISSN:
1364-548X
Subject:
heavy metals,   etc   ; adsorption; density functional theory; electrochemistry; specific ion electrodes;     Show all 5 Subjects
Abstract:
... Combining density functional theory calculation with experiments and kinetics simulation, a multiscale framework describing the influence of reactant–substrate interaction on electrochemical performance was proposed. It was found that the close band center and the rapid adsorption kinetics facilitated the highly selective response of Ni(111) toward Cu(ii), providing a useful tactic to investigate ...
DOI:
10.1039/d1cc00735a

20. Enhanced in situ Pb(II) passivation by biotransformation into chloropyromorphite during sludge composting

Author:
Chen, Zhi; Xing, Ruizhi; Yang, Xinggui; Zhao, Ziqiang; Liao, Hanpeng; Zhou, Shungui
Source:
Journal of hazardous materials 2021 v.408 pp. 124973
ISSN:
0304-3894
Subject:
heavy metals,   etc   ; Thermus thermophilus; biomineralization; biosorption; biotransformation; composts; sludge; thermophiles;     Show all 8 Subjects
Abstract:
... Composting is an effective technology for the disposal and utilization of solid biowastes. However, conventional composting is inefficient for the passivation of heavy metals in solid biowastes, thus limiting the applications of compost derived from solid biowaste. Here, a thermophilic biomineralization strategy was proposed and demonstrated during sludge composting for in situ heavy metals passiv ...
DOI:
10.1016/j.jhazmat.2020.124973