Rauch T, Drewes J E
Environmental Science and Engineering Division, Colorado School of Mines, Golden CO 80401-1887, USA.
Water Sci Technol. 2004;50(2):245-53.
The fate of effluent organic matter (EfOM) during groundwater recharge was investigated by studying the removal behavior of four bulk organic carbon fractions isolated from a secondary effluent: Hydrophilic organic matter (HPI), hydrophobic acids (HPO-A), colloidal organic matter (OM), and soluble microbial products (SMPs). Short-term removal of the bulk organic fractions during soil infiltration was simulated in biologically active soil columns. Results revealed that the four organic fractions showed a significantly different behavior with respect to biological removal. HPI and colloidal OM were prone to biological removal during initial soil infiltration (0-30 cm) and supported soil microbial biomass growth in the infiltrative surface. Additionally, colloidal OM was partly removed by physical adsorption or filtration. HPO-A and SMPs reacted recalcitrant towards biological degradation as indicated by low soil biomass activity responses. Adsorbability assessment of the biologically refractory portions of the fractions onto powered activated carbon (PAC) indicated that physical removal is not likely to play a significantly role in further diminishing recalcitrant HPO-A, HPI and SMPs during longer travel times in the subsurface.
通过研究从二级出水分离出的四种主要有机碳组分的去除行为，对地下水回灌过程中出水有机物（EfOM）的命运进行了调查：亲水性有机物（HPI）、疏水性酸（HPO-A）、胶体有机物（OM）和可溶性微生物产物（SMPs）。在具有生物活性的土壤柱中模拟了土壤渗透过程中主要有机组分的短期去除情况。结果表明，这四种有机组分在生物去除方面表现出显著不同的行为。HPI和胶体OM在土壤初始渗透（0-30厘米）过程中易于被生物去除，并在渗透表面支持土壤微生物生物量的增长。此外，胶体OM部分通过物理吸附或过滤被去除。低土壤生物量活性反应表明，HPO-A和SMPs对生物降解具有抗性。各组分难生物降解部分在粉末活性炭（PAC）上的吸附性评估表明，在地下更长的运移时间内，物理去除对进一步减少难降解的HPO-A、HPI和SMPs不太可能起显著作用。
