摘要
用实验室模拟方法，研究了堆制处理过程对污染土壤中４ ～６ 环的多环芳烃（ＰＡＨｓ） 的降解． 结果表明，堆制对６ 种难降解的ＰＡＨｓ 都有不同程度的降解作用，ＰＡＨｓ 的降解随着苯环数的增加而降低，其去除率的大小顺序为荧蒽＞ 苯并［ａ］ 蒽、苯并［ａ］ 芘＞ 苯并［ｂ］ 荧蒽、苯并［ｋ］ 荧蒽＞ 苯并［ｇｈｉ］ 北． 其中，荧蒽的去除率为４６．０ ％ ～９２．９％ ；苯并［ａ］ 蒽的去除率为７．７％ ～３７ ．２ ％ ． 当ＰＡＨｓ 的初始浓度提高约５０ 倍时，除荧蒽外其它ＰＡＨｓ 的降解随着污染浓度的提高而降低． 不同Ｃ／Ｎ均有类似的规律，但Ｃ／Ｎ２５：１ 比Ｃ／Ｎ４０：１ 为好． 堆中各种ＰＡＨｓ 浓度在高温期以前都有所提高，但在降温期以后又有不同程度的降低． 细菌总数测定表明，数量变化呈双峰型．
Laboratory scale test was conducted to evaluate the degradation of polycyclic aromatic hydrocarbons(PAHs) in composting of soil. Six PAHs were involved, including fluoranthene (FA), benzo[a]anthracene (B[a]A), benzo[b]fluoranthene (B[b]F), benzo[k]fluoranthene (B[k]F), benzo[a]pyrene (B[a]P) and benzo[g,h,i]perylene(B[ghi]Pe). The results indicated that all PAHs were degraded to some extent in the composting. The order of the percentage of PAHs loss was FA, B[a]A, B[a]P, B[b]F, B[k]F and B[ghi]Pe. Among those, FA removal rate was 46.0%～92.9% and B[a]A 7.7%～37.2%. The removal rates of the most PAHs decreased with rise of initial PAHs concentration, except FA. Similar rule was found in different C/N ratios (25:1～40:1), but 25:1 was better. The concentrations of PAHs increased during the temperature increasing stage and thermophic stage of the composting, but decreased during the temperature decreasing stage and curing stage. Total count of bacteria in the composting had two peak values.
出处
《应用与环境生物学报》
CAS
CSCD
1999年第6期605-609,共5页
Chinese Journal of Applied and Environmental Biology
基金
国家自然科学基金!(No:29577269)
关键词
堆制处理
土壤
多环芳烃
生物降解
生物修复
composting
soil
polycyclic aromatic hydrocarbons
bioremediation
biodegradation
