Effects of biochar on heavy metal bioavailability and uptake by tobacco (Nicotiana tabacum) in two soils

Zhang, Jiuquan; Li, Caibin; Li, Guitong; He, Yi; Yang, Jidong

doi:10.1016/j.agee.2021.107453

Cited by 23 publications

(5 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The physicochemical properties of soils affect the biological effectiveness of heavy metals mainly by influencing their morphology [ 35 ]. In this context, pH is one of the most important soil physicochemical properties because it affects the activity of heavy metals.…”

Section: Resultsmentioning

confidence: 99%

Risk Assessment of Heavy Metal in Farmlands and Crops Near Pb–Zn Mine Tailing Ponds in Niujiaotang, China

Han

Tian

et al. 2023

Toxics

View full text Add to dashboard Cite

To accurately evaluate the pollution and risk of heavy metals in crops and farmlands near mines, we determined the contents of Cr, Ni, Cu, As, Cd, Pb, and Zn in 10 farmland soil sampling sites and six crops (pak choi, rice, spring onion, radish, Chinese cabbage, Chrysanthemum coronarium) in an area near the Niujiaotang Pb–Zn mine in Duyun City, China. Four evaluation methods were compared, including the potential ecological hazard index, Nemeiro comprehensive pollution assessment, risk assessment code, and the ratio of secondary phase to primary phase methods. The average concentration of As, Cd, Pb, and Zn exceeded the soil environmental background levels in Niujiaotang and Guizhou Province. Cd exceeded the standard substantially, and Zn pollution accumulation was the most evident. Heavy metal contamination of crops was in the order pak choi > Chinese cabbage > spring onion > paddy > radish > Chrysanthemum coronarium, whereas heavy metal concentration in crops were in the order Zn > As > Cr > Cd > Ni > Pb. The levels of all heavy metals except Cu exceeded Chinese food hygiene standards. Carcinogenic and non-carcinogenic chemicals in crops present significant risks to adults and children. Risk evaluation considering the morphological contents of heavy metals rather than their total concentration was more accurate for environmental quality assessment of agricultural soils. Samples should be collected at different times to study the spatial and temporal distribution, and further studies on the migration transformation of heavy metals between the tailings pond-soil-crop should be conducted.

show abstract

Section: Resultsmentioning

confidence: 99%

Risk Assessment of Heavy Metal in Farmlands and Crops Near Pb–Zn Mine Tailing Ponds in Niujiaotang, China

Han

Tian

et al. 2023

Toxics

View full text Add to dashboard Cite

show abstract

“…The physicochemical properties of soils affect the biological effectiveness of heavy metals mainly by in uencing their form (Zhang et al 2021). In this context, pH is one of the most important soil physicochemical properties because it affects the activity of heavy metals.…”

Section: Resultsmentioning

confidence: 99%

Characteristics and risk assessment of heavy metal pollution of farmlands and crops near Pb–Zn mine tailing ponds: a case study in Niujiaotang, China

Han

Tian

et al. 2022

Preprint

View full text Add to dashboard Cite

To accurately evaluate the pollution and risk of heavy metals in crops and farmlands near mines, we determined the contents of Cr, Ni, Cu, As, Cd, Pb, and Zn in 10 farmland soil sampling sites and six crops (pak choi, rice, spring onion, radish, Chinese cabbage, Chrysanthemum coronarium) in an area near the Niujiaotang Pb–Zn mine in Duyun City, China. Four evaluation methods were compared, including the potential ecological hazard index, Nemeiro comprehensive pollution assessment, risk assessment code, and the ratio of secondary phase to primary phase methods. The average concentration of As, Cd, Pb, and Zn exceeded the soil environmental background levels in Niujiaotang and Guizhou Province. Cd exceeded the standard substantially, and Zn pollution accumulation was the most evident. Heavy metal contamination of crops was in the order pak choi > Chinese cabbage > spring onion > paddy > radish > Chrysanthemum coronarium, whereas heavy metal concentration in soils were in the order Zn > As > Cr > Cd > Ni > Pb. The levels of all heavy metals except Cu exceeded Chinese food hygiene standards. Carcinogenic and non-carcinogenic chemicals in crops present significant risks to adults and children. Risk evaluation considering the morphological contents of heavy metals rather than their total concentration was more accurate for environmental quality assessment of agricultural soils.

show abstract

“…The processing costs of this TWL are up to 150 dollars/ton, which places huge economic pressure on cigarette factories [3]. In recent years, the state has paid more attention to environmental protection and the discharge standards of wastewater are becoming more and more strict [4][5][6]. Nicotine is the toxic chemical in the TWL and is a serious hazard for the environment and the nervous system [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Tobacco Waste Liquid-Based Organic Fertilizer Particle for Controlled-Release Fulvic Acid and Immobilization of Heavy Metals in Soil

Wang

Yao

et al. 2022

Nanomaterials

View full text Add to dashboard Cite

Every year, a large amount of tobacco waste liquid (TWL) is discharged into the environment, resulting in serious pollution for the environment. In this work, a TWL-based particle (OACT) was fabricated by CaO, attapulgite (ATP), and TWL, and, then, OACT was coated by amino silicon oil (ASO) to form OACT@ASO. Therein, OACT@ASO had high controlled-release ability for fulvic acid (FA), because of the nanonetworks structure for ATP and the high content of FA in TWL. The release ratio (RR) of FA from OACT@ASO reached 94% at 75 h in deionized water, and 23% at 32 d in silica sand. Furthermore, the release mechanism of FA from OACT@ASO was consistent with the First-order law. Additionally, OACT@ASO also possessed high immobilization capacity for Cu(II), Cd(II), and Pb(II) (CCP) in soil. Notably, a pot experiment indicated that OACT@ASO could facilitate the growth of pakchoi seedlings and decrease the absorption of CCP by pakchoi seedlings. Thus, this study provides a new kind of organic fertilizer which could not only release FA, but also immobilize CCP in soil.

show abstract

Effects of biochar on heavy metal bioavailability and uptake by tobacco (Nicotiana tabacum) in two soils

Cited by 23 publications

References 43 publications

Risk Assessment of Heavy Metal in Farmlands and Crops Near Pb–Zn Mine Tailing Ponds in Niujiaotang, China

Risk Assessment of Heavy Metal in Farmlands and Crops Near Pb–Zn Mine Tailing Ponds in Niujiaotang, China

Characteristics and risk assessment of heavy metal pollution of farmlands and crops near Pb–Zn mine tailing ponds: a case study in Niujiaotang, China

Tobacco Waste Liquid-Based Organic Fertilizer Particle for Controlled-Release Fulvic Acid and Immobilization of Heavy Metals in Soil

Contact Info

Product

Resources

About