Research On Environmental Behavior Of Copper And Phenanthrene On Soils Under Heating And Bio-Chars Inputting

Biomass (the straw) burning not only impose heat on soils,but also induct some Organic matter(bio-chars),thus may affect the physicochemical properties and compsi te structure of soil.These will change environmental behaviorof pollutants on soils.So il is an important heavy metal and PAHs storage,so to study environmental behavior of main pollutants on soils under Biomass burningis very important to explore thei r migration and transformation and to ensureour healthy.This paper mainly do the following jobs:First,we explore adsorption behavior of copper ions under heating without BCs joined through studying copper ions adsorpt ion role on soils under different temperature treatment;Secondly,we explore adsorptio n behavior of copper ions and phenanthrene on soils which joined BCs;Finally,we st udy the effect of BCs to the absorptiveamount of copper ions and phenanthrene in maize by the pot experiments.The results obtained are described as follows:(1) Adsorption capacity size of soils to copper icons after heat treatment is CK>300℃>200℃.Compared to CK and soil under300℃processing,maximumadsorption o f copper icons on DS under200℃processing reduced by14.11%and8.67%,maxim um adsorption of copper icons on MG reduced by6.64%and2.86%.The change of copper icons adsorption quantity is closely related to the change of DOC and TOC on soils.(2) The physicochemical properties of BCs which made of straws on different moist ure contents is different.The carbon content.ratio of C/N and Specific surface area o f BCs (BCs A.BCs B and BCs C)increased while moisture content reducing. Adsorp tion ability of copper icons and phenanthrene on soils increasedafter joined BCs. M aximum adsorption of phenanthrene increased by18.18%,19.64%and26.23%,maxim um adsorption of copper icons increased by28.78%,29.40%and38.17%on soils aft er joined BCs A,BCs B and BCs C.(3) Adsorption ability of phenanthrene on BCs contaminated copper ions reduced alo ng with the pollution concentration increasing.When using the BCs which copper io ns saturated(concentration of copper ions is40000mg-kg-1)as adsorbent,maximum ad sorption quantity of Philippine reduced by44.36%.this may be due to the copper io ns and phenanthrene existing same adsorption loci which leading tocompetition adsor ption.(4) BCs joining can effectively reduce the ability of maize to absorb phenanthrene a nd copper icons:Absorptiveamount of copper in maize which putted into BCs A,B and C reduced by13.16%,17.97%and27.36%when copper icons concentration is100mg·kg-1on soil; Absorptiveamount of copper in maize which putted into BCs A, B and C reduced by13.06%,20.38%and26.12%when copper icons concentration i s200mg·kg-1on soil;Absorptiveamount of copper icons in maize which putted into BCs A,B and C reduced by15.44%,18.68%and25.28%when copper concentratio n is500mg·kg-1on soil.Absorptiveamount of copper icons in maize which putted in to BCs A,B and C reduced by15.44%,18.68%and25.28%when phenanthrene conc entration is20mg·kg-1on soil;Absorptiveamount of copper in maize which putted in to BCs A,B and C reduced by11.97%,21.28%and38.10%when phenanthrene conc entration is50mg·kg-1on soil.This may be due to enhanced fixation of pollutants i n soils which putting into BCs.