Effects of biochar and crop straws on the bioavailability of cadmium in contaminated soil.

Scientific Reports
Xuan ChenHua-Shou Li

Abstract

Numerous studies have been investigated the potential of biochar (BC) derived from various materials and crop straw (CS) to decrease the bioavailability of heavy metals in soil contaminated with cadmium (Cd), and thereby reduce their potential risk to human health and the ecological environment. However, little attention has been given to the comparison of heavy metal remediation efficiency using BC and CS such as peanut vine (PV) and rice straw (RS), especially in soil contaminated with Cd. Here, we explore if Cd bioavailability is affected in contaminated soil by BC and CS. Peanuts were grown in plastic pots, which contained BC or CS at 5% (dry weight, w/w) in controlled environment mesocosms. The bioavailability of Cd in contaminated soil was measured by Cd concentration in the plant and the concentrations of various forms of Cd in the soil. At the same plant age, growth with BC (compared with PV and RS) led to 13.56% and 8.28% lower rates of Cd content in the aboveground parts, 40.65% and 35.67% lower rates of Cd content in the seeds, yet 9.08% and 7.09% lower rates of Cd content in the roots, yet 35.80% and 28.48% lower rates of exchangeable Cd content in the soil. Moreover, BC amendment enhanced the biomass of peanut and ...Continue Reading

References

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Feb 20, 2019·Environment International·Liqiang CuiJames A Ippolito

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Citations

Sep 2, 2020·Journal of the Science of Food and Agriculture·José A Hernández-DíazSoledad García-Morales
Oct 24, 2020·International Journal of Environmental Research and Public Health·Yanfeng ZhuShaoliang Zhang
Jan 15, 2021·Journal of Hazardous Materials·Qiaohui ZhongZhaofeng Zhang
Jun 25, 2021·Bulletin of Environmental Contamination and Toxicology·Guobing WangHongyan Guo

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Methods Mentioned

BETA
atomic absorption spectrometry

Software Mentioned

Excel
Origin
SPSS

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