5BHUIYAN M A,PARVEZ L,ISLAM MA,et al.Heavy metal pollution of coal mine-affected agricultural soil in the northern part of Bangladesh[J].Journal of Hazardous Materials,2010,173(1-3):384-392.
9RAURET G,L譫PEZ-S魣NCHEZ JF,SAHUQUILLO A,et al.Improvement of the BCR three step sequential extraction procedure priorto the certification of newsediment and soil reference materials[J].J Environ Monit,1999,1(1):57-61.
