Arsenic(As)contamination has become the environment issue of global concern.In China,large area of farmland and the site soil were contaminated by As,which means that suitable remedying methods were urgently needed.Phytoremediation,as one of environment-friendly soil remediation techniques developed in recent years,shows a bright future for the remediation of As contaminated soils.However,phytoremediation efficiency needs to be enhanced further because of low concentration of bioavailable As in the soils.A triangle flask culture experiment was carried out to study the effects of functional species,isolated from As-polluted soils,that could improve As mobility from the soil.These species included two bacilli,B1 and B2(Brevibacillus)and two fungi,F1(Trichoderma),F2(Fusarium).They could transform the concentration of As fractionation in the soil sterilized by the method of60Co-γray.Through the experiment,the concentrations of non-specifically-sorbed and specifically-sorbed As fractionation,and p H value of culture solution with inoculated treatment were higher than that with the control.Especially,the concentration of non-specifically-sorbed As fractionation in the treatment-inoculated species was 2 to 6 times higher than that of non-inoculation treatment.Moreover,two bacilli and two fungi could produce IAA,which was conducive to the plant survival when they were jointly used in remedying the As-contaminated soil.
