摘要
本文研究了土壤中六价铬的吸附行为及其提取.结果表明,土壤对六价铬的吸附等混线符合Freundlich方程和Langmuir方程.pH及各种阴离子对吸附过程有不同程度的影响,其中以pH和磷酸根、氟离子的影响较为明显.土壤吸附的六价铬不易为H_2O,1mol/1 NH_4Cl和1mol/l NH_4OAc(pH7)提取,但易为0.5mol/l NH_4F(pH8.2),0.5mol/l NaHCO_3(pH8.5)和0.5mol/l Na_2CO_3提取.文章中还就土壤对六价铬的吸附机制以及所提出的土壤中六价格的提取剂的优点进行了讨论.
The adsoiption behavior and extraction of hexavalenl chromium in soil were studied. The adsorption isotherm of hexavalcnt chromium in soil was found to conform to the Langmuir equation and Freundlich equation. pH value and various anions could influence the adsorption in different extent. Among these, the influences of pH value phosphate and fluridc ions exhibited more significantly. The adsorbed hexavalent chiomium in soil was not extracted easily with H2O, 1 mol/1 NH4Cl and 1 mol/1 NH4OAc(pH7 ) , but extracted successfully with 0.5mol/l NH4F(pH8.2), 0.5mol/l NaHCO3(pH8.5) and 0.5mol/l Na2CO3.The mechanism for the adsorption of hexavalent chromium in soil and the extraction agents were also discussed.
出处
《环境化学》
CAS
CSCD
北大核心
1990年第4期43-48,共6页
Environmental Chemistry
