新型复合药剂原位修复河道底泥污染  

New composite agent in-situ remediation for river sediment pollution

作　　者：贺振洲 崔康平[1] 慈曾福 王郑[1] 孟蓉[1] 

机构地区：[1]合肥工业大学资源与环境工程学院,合肥230009 [2]合肥市排水管理办公室,合肥230001

出　　处：《环境工程学报》2017年第6期3481-3486,共6页Chinese Journal of Environmental Engineering

基　　金：国家水体污染控制与治理科技重大专项(2011ZX07303-002;2012ZX07205-002)

摘　　要：采用新型复合药剂开展河道底泥原位修复技术研究,通过考察河道水质改善效果、底泥中磷含量及形态的变化确定药剂的最佳投加量。结果表明,投加复合药剂对上覆水体中TN、NH+4-N和TP均有不同程度的净化效果,且净化效果随药剂量的增加而增强,最高去除率分别达到23.52%、21.79%和81.5%,上覆水体COD去除率随药剂投加量增多呈先升后降的趋势,最高(投加量为600 mg·L^(-1))达到57.6%。从底泥磷含量及形态变化来看,投加药剂增大了底泥TP含量并促进底泥不稳态磷向稳定态磷转化。因此,从经济成本和修复效果方面综合分析,以投加量为600 mg·L^(-1)对底泥污染原位修复较为合适。A new composite agent was used for in-situ sediment remediation. The effects of remediation, the con- centration of TP in the sediment, and the forms of phosphorus were investigated in this study. The results showed that the new composite agent removed TN, NH4＋-N, and TP well, and an enhanced effect was achieved with a dose increase of the new composite agent. The highest removal rates of TN, NH4＋-N, and TP were 23.52% , 21.79% , and 81.5% , respectively. In the waterbody overlying the sediment, the removal rate of COD first in- creased and then decreased, as the dosage of the reagent increased, with the highest removal rate （dosage of 600 mg · L-1 ） reaching 57.6%. Adding the new composite agent can increase the concentration of TP in the sediment and can promote the conversion of unstable phosphorus to a steady state. Based on economic costs and remediation effects, the optimum dosage of the new composite agent was 600 mg · L-1.

关 键 词：新型复合药剂 原位修复 上覆水体 底泥 磷形态 

分 类 号：X522[环境科学与工程—环境工程]