title: Behavior of solid carbon sources for biological denitrification in groundwater remediation.
abstract: The present study was conducted to compare the behavior of wheat straw, sawdust and biodegradable plastic (BP) as potential carbon sources for denitrification in groundwater remediation. The results showed that a greater amount of nitrogen compounds were released from wheat straw and sawdust than from BP in leaching experiments. In batch experiments, BP showed higher nitrate removal efficiency and longer service life than wheat straw and sawdust, which illustrated that BP is the most appropriate carbon source for stimulation of denitrification activity. In column experiments, BP was able to support complete denitrification at influent nitrate concentrations of 50, 60, 70, 80, and 90 mg NO(3)(-)-N/L, showing corresponding denitrification rates of 0.12, 0.14, 0.17, 0.19, and 0.22 mg NO(3)(-)-N.L(-1).d(-1).g(-1), respectively. These findings indicate that BP is applicable for use as a carbon source for nitrate-polluted groundwater remediation.
authors.affiliation: School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing 100083, China.
authors.forename: Jianmei
authors.initials: J
authors.lastname: Zhang
authors.forename: Chuanping
authors.initials: C
authors.lastname: Feng
authors.forename: Siqi
authors.initials: S
authors.lastname: Hong
authors.forename: Huiling
authors.initials: H
authors.lastname: Hao
authors.forename: Yingnan
authors.initials: Y
authors.lastname: Yang
mesh_terms: D002244:Carbon / Q000737:chemistry*; D058440:Denitrification; D004784:Environmental Monitoring; D060587:Groundwater / Q000737:chemistry*; D009566:Nitrates / Q000737:chemistry; D009584:Nitrogen / Q000737:chemistry; D013997:Time Factors; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*
chemical_list: D009566:Nitrates; D014874:Water Pollutants, Chemical; D002244:Carbon; D009584:Nitrogen