[PRB technology in situ remediation of groundwater polluted by landfill leachate].
In this paper three reaction media zero valent iron (ZVI), a mixture of ZVI and activated carbon, a mixture of the ZVI and zeolites were used to design three kinds of permeable reactive barrier (PRB), viz. reactors A, B and C and to study the feasibility and the efficiency of the PRB technology in the remediation of leachate-polluted groundwater. The designs of the reactors took into account the relation of the permeability of the reactor with the permeability of the aquifer. The results indicated that the COD removal ratios of the reactor A, B and C were more than 80%, 90% and 70% respectively and the value of the BOD5/COD increased from 0.32 up to 0.781, 0.728, 0.716 respectively. Total nitrogen decreased from 50 mg/L to less than 10 mg/L and the removal ratio of the ammonium ranged from 78%-91%. Zeolites of the reactor C manifested effectiveness in the removal of heavy metals and hardness. The removal ratios of Mn ion, Zn ion and hardness were up to 90%, 80%, 81% respectively. These results indicate that PRB technology is an efficient method for the treatment of leachate-contaminated groundwater.
Dong
Jun
J
College of Environment and Resources, Jilin University, Changchun 130026, China.
Zhao
Yongsheng
Y
Zhao
Xiaobo
X
Wang
Lei
L
Xiao
Yanbo
Y
Zhao
Zhe
Z
D019149:Bioreactors; D005618:Fresh Water / Q000032:analysis*; D019216:Metals, Heavy / Q000302:isolation & purification; D009566:Nitrates / Q000302:isolation & purification; D012037:Refuse Disposal; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*
D019216:Metals, Heavy; D009566:Nitrates; D014874:Water Pollutants, Chemical