TY - JOUR
T1 - Optimization of solar degradation efficiency of bio-composting leachate using Nd
T2 - ZnO nanoparticles
AU - Shahmoradi, B.
AU - Yavari, S.
AU - Zandsalimi, Y.
AU - Shivaraju, H. P.
AU - Negahdari, M.
AU - Maleki, A.
AU - Mckay, Gordon
AU - Pawar, Radheshyam R.
AU - Lee, Seung Mok
N1 - Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2018/4/1
Y1 - 2018/4/1
N2 - Composting leachate is one of the highly polluted liquids generated at landfills and compost plant. Therefore, the aim of this research work was to photodegrade leachate generated from a biocomposting plant from Iran by neodymium-doped ZnO hybrid nanoparticles (Nd:ZnO NPs). The photocatalytic degradation of leachate was optimized based on surface response methodology. For the experimental design and process optimization, the central composite design was applied. The parameters studied were the dosage of Nd:ZnO NPs, solution pH, contact time, H2O2 concentration, and leachate concentration. Using “ Design Expert software (Trial Version 7.0)” totally 33 runs were considered for photodegradation studies. Mineralization of the leachate was confirmed by COD analysis. The response was assessed for different models and the high regression coefficient (R2 = 0.9782, Radj = 0.9909) between the variables and the response confirmed excellent estimation of experimental data by quadratic model. The optimum conditions (COD removal efficiency of 82.19%) were found to be at pH 6.74, Nd-doped ZnO dosage of 1920 mg/l, leachate concentration of 2000 mg/l, contact time of 114.62 min, the H2O2 concentration of 12.56 Mmole, and dopant percentage of 0.75.
AB - Composting leachate is one of the highly polluted liquids generated at landfills and compost plant. Therefore, the aim of this research work was to photodegrade leachate generated from a biocomposting plant from Iran by neodymium-doped ZnO hybrid nanoparticles (Nd:ZnO NPs). The photocatalytic degradation of leachate was optimized based on surface response methodology. For the experimental design and process optimization, the central composite design was applied. The parameters studied were the dosage of Nd:ZnO NPs, solution pH, contact time, H2O2 concentration, and leachate concentration. Using “ Design Expert software (Trial Version 7.0)” totally 33 runs were considered for photodegradation studies. Mineralization of the leachate was confirmed by COD analysis. The response was assessed for different models and the high regression coefficient (R2 = 0.9782, Radj = 0.9909) between the variables and the response confirmed excellent estimation of experimental data by quadratic model. The optimum conditions (COD removal efficiency of 82.19%) were found to be at pH 6.74, Nd-doped ZnO dosage of 1920 mg/l, leachate concentration of 2000 mg/l, contact time of 114.62 min, the H2O2 concentration of 12.56 Mmole, and dopant percentage of 0.75.
KW - Leachate
KW - Nd: znO nanoparticles
KW - Photodegradation
KW - Rsm
UR - http://www.scopus.com/inward/record.url?scp=85040345145&partnerID=8YFLogxK
U2 - 10.1016/j.jphotochem.2018.01.002
DO - 10.1016/j.jphotochem.2018.01.002
M3 - Article
AN - SCOPUS:85040345145
SN - 1010-6030
VL - 356
SP - 201
EP - 211
JO - Journal of Photochemistry and Photobiology A: Chemistry
JF - Journal of Photochemistry and Photobiology A: Chemistry
ER -