Interaction between pollutants during the removal of polychlorinated biphenyl-heavy metal combined pollution by modified nanoscale zero-valent iron

2019 ◽  
Vol 673 ◽  
pp. 120-127 ◽  
Author(s):  
Yiling Lou ◽  
Yuchen Cai ◽  
Yanning Tong ◽  
Lichun Hsieh ◽  
Xiangru Li ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Polychlorinated Biphenyl ◽  
Zero Valent Iron ◽  
Combined Pollution ◽  
Nanoscale Zero Valent Iron

scholarly journals Application of nanoscale zero-valent iron in hexavalent chromium-contaminated soil: A review

2020 ◽  
Vol 9 (1) ◽  
pp. 736-750
Author(s):  
Xilu Chen ◽  
Xiaomin Li ◽  
Dandan Xu ◽  
Weichun Yang ◽  
Shaoyuan Bai
Keyword(s):  
Heavy Metal ◽  
Hexavalent Chromium ◽  
Contaminated Soil ◽  
Zero Valent Iron ◽  
Toxic Heavy Metal ◽  
Factors Affecting ◽  
Metal Pollutants ◽  
Nanoscale Zero Valent Iron ◽  
Low Toxicity ◽  
Heavy Metal Pollutants

AbstractChromium (Cr) is a common toxic heavy metal that is widely used in all kinds of industries, causing a series of environmental problems. Nanoscale zero- valent iron (nZVI) is considered to be an ideal remediation material for contaminated soil, especially for heavy metal pollutants. As a material of low toxicity and good activity, nZVI has been widely applied in the in situ remediation of soil hexavalent chromium (Cr(vi)) with mobility and toxicity in recent years. In this paper, some current technologies for the preparation of nZVI are summarized and the remediation mechanism of Cr(vi)-contaminated soil is proposed. Five classified modified nZVI materials are introduced and their remediation processes in Cr(vi)-contaminated soil are summarized. Key factors affecting the remediation of Cr(vi)-contaminated soil by nZVI are studied. Interaction mechanisms between nZVI-based materials and Cr(vi) are explored. This study provides a comprehensive review of the nZVI materials for the remediation of Cr(vi)-contaminated soil, which is conducive to reducing soil pollution.

Nanoscale zero-valent iron functionalized Posidonia oceanica marine biomass for heavy metal removal from water

2017 ◽  
Vol 24 (36) ◽  
pp. 27879-27896 ◽  
Author(s):  
Saber Boubakri ◽  
Mohamed Amine Djebbi ◽  
Zaineb Bouaziz ◽  
Philippe Namour ◽  
Abdesslem Ben Haj Amara ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Posidonia Oceanica ◽  
Zero Valent Iron ◽  
Marine Biomass ◽  
Nanoscale Zero Valent Iron

Removal of heavy metal lead(II) using nanoscale zero-valent iron with different preservation methods

2019 ◽  
Vol 30 (3) ◽  
pp. 581-589 ◽  
Author(s):  
Zhang Dongsheng ◽  
Gao Wenqiang ◽  
Chang Guozhang ◽  
Luo Shuai ◽  
Jiao Weizhou ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Zero Valent Iron ◽  
Preservation Methods ◽  
Nanoscale Zero Valent Iron

scholarly journals Remediation of Cd-Contaminated Soil by Modified Nanoscale Zero-Valent Iron: Role of Plant Root Exudates and Inner Mechanisms

2021 ◽  
Vol 18 (11) ◽  
pp. 5887
Author(s):  
Danlian Huang ◽  
Yunhe Yang ◽  
Rui Deng ◽  
Xiaomin Gong ◽  
Wei Zhou ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Root Exudates ◽  
Contaminated Soil ◽  
Great Influence ◽  
Zero Valent Iron ◽  
High Concentration ◽  
Soil Microbial Community Structure ◽  
Nanoscale Zero Valent Iron ◽  
Cd Removal

In this study, the role of exogenous root exudates and microorganisms was investigated in the application of modified nanoscale zero-valent iron (nZVI) for the remediation of cadmium (Cd)-contaminated soil. In this experiment, citric acid (CA) was used to simulate root exudates, which were then added to water and soil to simulate the pore water and rhizosphere environment. In detail, the experiment in water demonstrated that low concentration of CA facilitated Cd removal by nZVI, while the high concentration achieved the opposite. Among them, CA can promote the adsorption of Cd not only by direct complexation with heavy metal ions, but also by indirect effect to promote the production of iron hydroxyl oxides which has excellent heavy metal adsorption properties. Additionally, the H+ dissociated from CA posed a great influence on Cd removal. The situation in soil was similar to that in water, where low concentrations of CA contributed to the immobilization of Cd by nZVI, while high concentrations promoted the desorption of Cd and the generation of CA–Cd complexes which facilitated the uptake of Cd by plants. As the reaction progressed, the soil pH and cation exchange capacity (CEC) increased, while organic matter (OM) decreased. Meanwhile, the soil microbial community structure and diversity were investigated by high-throughput sequencing after incubation with CA and nZVI. It was found that a high concentration of CA was not conducive to the growth of microorganisms, while CMC had the effect of alleviating the biological toxicity of nZVI.

scholarly journals The removal of copper (II) and lead (II) from aqueous solution using Fuller’s earth and Fuller’s earth-immobilized nanoscale zero valent iron (FE-NZVI) by adsorption

2019 ◽  
Vol 268 ◽  
pp. 05006 ◽  
Author(s):  
Manases Malacas ◽  
Marvie Christian Balberan ◽  
Nurul Amal Janna Bederi ◽  
Chriztian Jay Ramos ◽  
Marvin Rato ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Reduction Method ◽  
Sem Analysis ◽  
Zero Valent Iron ◽  
Adsorption Method ◽  
Environmental Laws ◽  
Heavy Metal Remediation ◽  
Nanoscale Zero Valent Iron ◽  
Fuller’S Earth ◽  
Heavy Metal Adsorbent

The present study investigates the propensity of Fuller’s Earth, a diatomaceous earth that is cheap and abundant in several locations whose application is yet to be fully ventured, and Fuller’s Earth-Immobilized Nanoscale Zero Valent Iron in removing heavy metal contaminants, particularly Pb2+ and Cu2+ , from aqueous solutions through adsorption method. FE-nZVI were synthesized through the borohydride reduction method and subsequently characterized through SEM, FTIR, and XRD. The SEM analysis shows an increase in the agglomeration of the nZVI on the immobilized Fullers’ Earth with an increase in the loading of Fe0. Tests were conducted on various samples in order to determine the effect of three parameters on the efficiency of the adsorbent which includes the initial concentration of the heavy metal, adsorbent dosage and pH with respect to time. The results show that the FE-nZVI can be used as a new adsorbent for the sole application of heavy metal remediation in aqueous systems due to its efficiency in removing the contaminants that would allow individuals to conform to the stringent requirements dictated by environmental laws.

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