Accumulation and transport of mercury by vegetables under biocarbon inhibition in the farmland experiment
[Objective]To investigate the effect of bio-carbon on the remediation of Hg contaminated soils.[Method]We used 1 000 kg/667m2 biocarbon to inactivate Hg from mining soils with low,medium and high mercury contamination to investigate the effect of mercury accumulation and transport in fruits and rhizomes of vegetables.[Result]The Hg content was highest in the roots of the vegetables,then the trans-fer to the stems,leaves and fruits gradually decreased after the application of biochar.The order of transfer capability was as follows:loofah>beans>eggplant>pepper>cowpea>cucumber.Compared to no biochar,the enrichment coefficient decreased by 53.3%,20.6%,14.7%,10.5%and 8%,respectively.Thus,faba bean and cowpea showed the most pronounced inhibitory effect on Hg,while capsicum was the weakest.On the other hand,bean,cucumber and cowpea had the best effect on low,medium and high mer-cury soils,but had little effect on loofah.[Conclusion]The biocarbon control of mercury accumulation in dif-ferent vegetables can provide theoretical basis and technical reference for practical application of remedia-tion of mercury contaminated soil.
mercurybiocharsoil mercury pollutionenrichment and transportpassivation remediation
NETL
NSTL
万方数据
维普
