CAJ | 학술논문

畜禽粪便中残留的兽药进入土壤后的移动性是评价其淋溶能力(对地下水的污染风险)的重要信息.通过土壤柱稳定流实验,考察了不同淋溶剂、粪浸液等对洛克沙胂在不同深度(0～20、20～50、50～80 cm)灰潮土中的迁移行为影响.结果表明,水、0.01mol·L~(-1) CaCl_2、0.01 mol·L~(-1) EDTA-Na2淋溶剂,对不同深度土壤柱中洛克沙胂的淋溶穿透曲线(BTCs)呈现不同程度的不对称性,在不同深度土壤柱中对洛克沙胂的淋出率分别为:水为92.3%～97.1%,0.01 mol·L~(-1) CaCl_2为71.0%～84.9%,0.01 mol·EDTA-Na_2为75.4%～91.2%;土壤柱先用粪浸液通过后,洛克沙胂的穿透曲线峰时间均有不同程度的提前,淋出率均有增加,在不同深度土壤柱中的淋出率分别为:水为96.4%～110.4%,0.01 mol·L~(-1) CaCl_2为94.5%～106.8%,0.01 mol·L~(-1) EDTA-Na_2为90.8%～103.2%.说明洛克沙胂随粪便进入土壤后可较快地淋溶迁移,可进入地表水和地下水中,对水环境质量的影响较大.
축금분편중잔류적수약진입토양후적이동성시평개기림용능력(대지하수적오염풍험)적중요신식.통과토양주은정류실험,고찰료불동림용제、분침액등대락극사신재불동심도(0～20、20～50、50～80 cm)회조토중적천이행위영향.결과표명,수、0.01mol·L~(-1) CaCl_2、0.01 mol·L~(-1) EDTA-Na2림용제,대불동심도토양주중락극사신적림용천투곡선(BTCs)정현불동정도적불대칭성,재불동심도토양주중대락극사신적림출솔분별위:수위92.3%～97.1%,0.01 mol·L~(-1) CaCl_2위71.0%～84.9%,0.01 mol·EDTA-Na_2위75.4%～91.2%;토양주선용분침액통과후,락극사신적천투곡선봉시간균유불동정도적제전,림출솔균유증가,재불동심도토양주중적림출솔분별위:수위96.4%～110.4%,0.01 mol·L~(-1) CaCl_2위94.5%～106.8%,0.01 mol·L~(-1) EDTA-Na_2위90.8%～103.2%.설명락극사신수분편진입토양후가교쾌지림용천이,가진입지표수화지하수중,대수배경질량적영향교대.
The transport behavior of veterinarial drugs residue in animal manure into soils is essential for evaluating the potential ability leaching to groundwater. Roxarsone, a animal feed additive widely used for growth stimulation, run into soil with the fertilizer of animal manure. The transport characteristic of roxarsone in soil was investigated by leaching experiment in soil columns. The transport proportion of roxarsone to various depth Grayfluvo-aquicsoils leached by water, 0.01 mol·L~(-1) CaCl_2, 0.01 mol·L~(-1) EDTA-Na_2 were determined using soil column experiment. Effect of water-extract of chicken manure on leaching of roxarsone in different depth soils was also studied. Results showed all measured breakthrough curves (BTCs) of roxarsone exhibited extent of asymmetry with sharp adsorption and slow desorption fronts leaching by water, 0.01 mol·L~(-1) CaCl_2、0.01 mol·L~(-1) EDTA-Na_2. Comparing the dose of roxarsone to soil column, the leaching rate in different depth soils was 92.3%～97.1% by water, 71.0%～84.9% by 0.01 mol·L~(-1) CaCl_2, 75.4%～91.2% by 0.01 mol·L~(-1) EDTA-Na_2 respectively. When the water-extract of chicken manure was firstly through these soil columns, the peak time of BTCs was all shortened and the content of roxarsone leached from soil was all increased, with leaching rate 96.4%～110.4% by water, 94.5%～106.8% by 0.01 mol·L~(-1) CaCl_2, 90.8%～103.2% by 0.01 mol·L~(-1) EDTA-Na_2. It was came to a conclusion that roxarsone into soil with the manure application could be fastly leached into groundwater from different depth soils, being a risk to water environment.