【摘要】 目前,新型污染沉积物治理技术-炭质修复剂原位治理技术在中国鲜有研究和应用。选择3种炭质吸附剂为修复剂,对其表面性质进行表征,应用索氏提取、序列提取和半透膜被动采样法(SPMDs)分析方法评价了3种炭质修复剂原位治理萘和菲污染沉积物的效果。实验室模拟实验表明,掺混炭质修复剂3个月后萘和菲的SPMD富集量分别降低了35%~53%和33%~43%。现场实验表明:凉水河沉积物中萘的A2(提取剂为水与甲醇体积比1∶1)浓度降低45%~77%,说明炭质修复剂对萘和菲有较强的"固定"作用,炭质修复剂的加入能降低沉积物中有机污染物的生物可利用性;草木灰治理效果强于2种生物质电厂灰,这可能是因为其比表面积大于生物质电厂灰。更多还原

【Abstract】 New remedial technique of contaminated sediment in-situ amendment of carbonaceous sorbent has been seldom researched and applied in China by new. In this investigation,3 carbonaceous sorbents were chosen as remediators and their surface charicteritics were measured. The effectiveness of the 3 carbonaceous sorbents in-situ amendment to naphthalene( NAP) and phenanthrene( PHE) contaminated sediment were evaluated using Soxhlet,sequential extraction and semipermeable membrane devices( SPMDs). The data from the simulation experiment in the laboratory demonstrated that after 3-month SPMD accumulations for NAP and PHE decreased by 35% ~ 53% and 33% ~ 43%,respectively and field experiment at Liangshui River suggested that A2 concentrations( water and methanol,V/V = 1∶ 1) of naphthalene in sediments reduced by45% ~ 77%,implying the strong "stabilization " effect of carbonaceous sorbents on NAP and PHE and bioavailability reduction of organic contaminants in sediment by carbonaceous sorbent addition. The better efficiency of merchant biomass ash,compared with the 2 biomass power plants ashes probably resulted from its larger specific surface area.更多还原