Treatment of landfill leachate using immobilized Phanerochaete chrysosporium loaded with nitrogen-doped TiO₂ nanoparticles.
This study investigated the performance of immobilized Phanerochaete chrysosporium loaded with nitrogen-doped TiO2 nanoparticles in the treatment of raw landfill leachate with a very low biodegradability ratio (BOD5/COD) of 0.09. The effects of various operating parameters, such as initial chemical oxygen demand (COD) concentration, pH, temperature, and biosorbent dosage, were evaluated with respect to the removal efficiency of total organic carbon (TOC) and ammonia nitrogen (NH3-N). For the immobilized biosorbents, an optimum pH of 6.0 for TOC and 7.0 for NH3-N were found suitable for TOC and NH3-N removal at temperature of 37°C, respectively. The most superior removal efficiencies of TOC and NH3-N of landfill leachate were over 75% and 74% in 72 h at an initial COD concentration of 200 mg L(-1), respectively. In addition, heavy metals were partly removed by the immobilized biosorbents during the process of landfill leachate treatment. The species and mass percentage of organic compounds in landfill leachate after the treatment were found to have considerably declined according to the gas chromatography coupled with mass spectrometry (GC-MS) system. These results indicate that the immobilized P. chrysosporium loaded with nitrogen-doped TiO2 nanoparticles could be a convenient and efficient method for the treatment of landfill leachate.
College of Environmental Science and Engineering, Hunan University, Changsha, Hunan 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, Hunan 410082, PR China.
Liang
L
Hu
College of Environmental Science and Engineering, Hunan University, Changsha, Hunan 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, Hunan 410082, PR China. Electronic address: zgming@hnu.edu.cn.
Guangming
G
Zeng
College of Environmental Science and Engineering, Hunan University, Changsha, Hunan 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, Hunan 410082, PR China. Electronic address: gqchen@hnu.edu.cn.
Guiqiu
G
Chen
College of Environmental Science and Engineering, Hunan University, Changsha, Hunan 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, Hunan 410082, PR China.
Haoran
H
Dong
College of Environmental Science and Engineering, Hunan University, Changsha, Hunan 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, Hunan 410082, PR China.
Yutang
Y
Liu
College of Environmental Science and Engineering, Hunan University, Changsha, Hunan 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, Hunan 410082, PR China.
Jia
J
Wan
College of Resources and Environment, Hunan Agricultural University, Changsha, Hunan 410128, PR China.
Anwei
A
Chen
College of Environmental Science and Engineering, Hunan University, Changsha, Hunan 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, Hunan 410082, PR China.
Zhi
Z
Guo
College of Environmental Science and Engineering, Hunan University, Changsha, Hunan 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, Hunan 410082, PR China.
Ming
M
Yan
College of Environmental Science and Engineering, Hunan University, Changsha, Hunan 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, Hunan 410082, PR China.
Haipeng
H
Wu
College of Environmental Science and Engineering, Hunan University, Changsha, Hunan 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, Hunan 410082, PR China.
Zhigang
Z
Yu
D000464:Alginates / Q000737:chemistry; D000641:Ammonia / Q000737:chemistry; D002244:Carbon / Q000737:chemistry; D018914:Cells, Immobilized; D020723:Glucuronic Acid / Q000737:chemistry; D006603:Hexuronic Acids / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D019216:Metals, Heavy / Q000737:chemistry; D053758:Nanoparticles / Q000737:chemistry*; D009584:Nitrogen / Q000737:chemistry*; D020075:Phanerochaete / Q000737:chemistry*; D013696:Temperature; D014025:Titanium / Q000737:chemistry*; D014865:Waste Disposal, Fluid / Q000379:methods; D014874:Water Pollutants, Chemical / Q000737:chemistry*
D000464:Alginates; D006603:Hexuronic Acids; D019216:Metals, Heavy; D014874:Water Pollutants, Chemical; C009495:titanium dioxide; D002244:Carbon; D000641:Ammonia; D020723:Glucuronic Acid; D014025:Titanium; D009584:Nitrogen
Ammonia nitrogen; Biodegradation; Landfill leachate; Phanerochaete chrysosporium; Total organic carbon