含锰改性活性炭联合植物对路域水体富营养化修复效果研究

Study on Remediation Effect of Eutrophication of Road Water by Manganese Modified Activated Carbon Combined with Plants

为研究改性活性炭联合植物对路域水体富营养化修复效果,以纤维化活性炭(XWT)为原料,双氧水、氢氧化钠、铁的氧化物、硫酸锰为改性剂,联合水生植物水葱(SV)对富营养化水体进行修复。研究了吸附剂投加量、改性吸附剂物理结构参数及红外光谱图,测定了改性活性炭联合植物修复富营养化水体,水体中总氮(TN)、总磷(TP)、NH_(4)-N吸附量和去除率。根据实验结果得出,3种材料均对水体中TN、TP、NH_(4)-N的去除率显著。其中Mn-Fe-NA-XWT/SV联合处理的效果最好,随着处理时间的增加,TN的额浓度呈现下降的趋势,3种材料对TN、TP、NH_(4)-N的处理能力大小为Mn-Fe-NA-XWT/SV>Mn-Fe-NA-XWT>XWT。含锰吸附剂对富营养物质的单位吸附量大小顺序为TN>TP>NH_(4)-N,吸附剂的加入量为4.5 g的时候,吸附剂对TN、TP和NH_(4)-N的单位吸附量分别为8.67,7.32,6.34 mg/g。考虑到吸附能力和富营养物质的去除率,以及吸附剂的使用成本和效果,推荐吸附剂的加入量为3~4.5 g。

In order to study the effect of modified activated carbon combined with plants on the remediation of road water eutrophication,the fibrotic activated carbon was used as raw material,hydrogen peroxide,sodium hydroxide,iron oxide,manganese sulfate was used as modifier,and the aquatic plant scallion was used to repair the eutrophic water.Studying the dosage of adsorbent,physical structure parameters of modified adsorbent,infrared spectrogram,and the adsorption capacity and removal rate of TN,TP,NH 4-N in water body that repaired by modified activated carbon combined with plants.According to the experimental results,the 3 materials have significant removal rates of TN,TP,NH 4-N in water.Among them,Mn-Fe-NA-XWT/SV combined treatment had the best effect.With the increase of treatment time,the specific concentration of TN showed a downward trend.The capacity of the 3 materials to treat TN,TP and NH 4-N was Mn-Fe-NA-XWT/SV>Mn-Fe-NA-XWT>XWT.The order of the unit adsorption capacity of manganese containing adsorbent for eutrophic substances is TN>TP>NH 4-N.When the amount of adsorbent is 4.5 g,the unit adsorption capacity of the adsorbent for TN,TP and NH 4-N is 8.67 mg/g,7.32 mg/g and 6.34 mg/g relatively.Considering the adsorption capacity and removal rate of eutrophic substances,the use cost and effect of adsorbent,the recommended amount of adsorbent is 3~4.5 g.