Effect of lychee biochar on the remediation of heavy metal-contaminated soil using sunflower: A field experiment

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.

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Bacterial inoculant-assisted phytoremediation of heavy metal-contaminated soil: Inoculant development and the inoculation effects

Biologia ◽

10.1007/s11756-021-00804-y ◽

2021 ◽

Author(s):

Yu Qing Song ◽

Shafinaz Shahir ◽

Fazilah Abd Manan

Keyword(s):

Heavy Metal ◽

Contaminated Soil ◽

Soil Inoculant ◽

Assisted Phytoremediation

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Performances of biodegradable polymer composites with functions of nutrient slow-release and water retention in simulating heavy metal contaminated soil: Biodegradability and nutrient release characteristics

Journal of Cleaner Production ◽

10.1016/j.jclepro.2021.126278 ◽

2021 ◽

Vol 294 ◽

pp. 126278

Author(s):

Yang Xiang ◽

Congying Li ◽

Hongbin Hao ◽

Yingfang Tong ◽

Wenjun Chen ◽

...

Keyword(s):

Heavy Metal ◽

Polymer Composites ◽

Contaminated Soil ◽

Biodegradable Polymer ◽

Water Retention ◽

Slow Release ◽

Nutrient Release

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The Study of Remediation Standards of Heavy Metal-Cu Contaminated Soil Based on Risk Assessment

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.414.93 ◽

2011 ◽

Vol 414 ◽

pp. 93-98

Author(s):

An Ping Liu ◽

Xiao Nan Sun ◽

Fang Yang ◽

Xing Xing Yao

Keyword(s):

Risk Assessment ◽

Heavy Metal ◽

Soil Remediation ◽

Contaminated Soil ◽

Assessment Model ◽

Risk Assessment Model ◽

Oral Ingestion ◽

Cu Contamination ◽

Standard Value ◽

Exposure Methods

This paper describes the model of heavy metal-Cu contaminated soil remediation standard value based on risk assessment. In the Cu contamination risk assessment model, the main exposure methods are oral ingestion and inhalation through breathing, which not only simplifies the calculation but also make people get a clearer understanding of the way of Cu contamination. We get the simplified formula, calculate and discuss Cu contaminated soil remediation target value in specific parameters to provide reference and basis for the remediation of Cu contaminated soil.

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Phytoremediation of Petroleum-Contaminated Soil

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.356-360.2737 ◽

2011 ◽

Vol 356-360 ◽

pp. 2737-2740

Author(s):

Chun Rong Li ◽

Abao Wei ◽

Tao Chen

Keyword(s):

Field Experiment ◽

Contaminated Soil ◽

Control Area ◽

Degradation Kinetic ◽

Degradation Rates ◽

Petroleum Contaminated Soil

Corn, sunflower and alfalfa were taken as remediation plants. Their phytoremediation and degradation kinetic of petroleum were investigated under field experiment. The results indicated that petroleum degradation rates of corn, sunflower and alfalfa remediation areas reached 42.5%, 46.4% and 44.7% after 150 days of remediation, which were increased by 100.5%, 118.9% and 110.8% compared with that in control area, respectively. Petroleum degradation rates of sunflower remediation areas﹥alfalfa remediation areas’﹥corn remediation areas’, whose half-lifes were 165d, 182d and 193d, respectively, which were decreased by 297d, 279d and 269d compared with that in control area, respectively. The remediation effects of corn, sunflower and alfalfa were obvious.

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Mobility of Zinc in Heavy Metal Contaminated Soil after Compost Amendment and Brassica juncea Harvest

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.641-642.1141 ◽

2014 ◽

Vol 641-642 ◽

pp. 1141-1145 ◽

Cited By ~ 1

Author(s):

Hong Li Huang ◽

Lin Luo ◽

Jia Chao Zhang ◽

Pu Feng Qin ◽

Man Yu ◽

...

Keyword(s):

Heavy Metal ◽

Brassica Juncea ◽

Contaminated Soil ◽

Water Soluble ◽

Residual Fraction ◽

Mobility Factor ◽

Zn Concentration ◽

Compost Amendment ◽

Exchangeable Fraction ◽

Mn Oxides

Pot experiments were performed to investigate the effect of compost amendment on the mobility of zinc through analysis of Zn fractions in heavy metal contaminated soil. The results showed that the total Zn concentration decreased 8.11%, 10.15%, 16.15%, 20.05%, 7.28% and 5.02% after the amendment of 0, 20, 40, 60, 80, 100 g/kg compost to soil and Brassica juncea harvest, respectively. Zn was mostly concentrated in the residual fraction and Fe-Mn oxides fraction in soil. The percentage of Zn in water-soluble fraction, organic fraction and residual fraction had no correlation with the amount of compost amendment. The percentage of Zn in the exchangeable fraction decreased and the percentage of Zn in Fe-Mn oxides fractions increased obviously. Furthermore, the mobility factor of Zn decreased significantly from 19.20% without compost amendment to 19.09%, 18.70%, 18.15%, 16.45% and 16.12% after the amendment of 0, 20, 40, 60, 80, 100 g/kg compost to soil, the compost amendment could lowered the mobility and phytotoxicity of zinc through bound to Fe-Mn oxides.

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