In this paper, a statistically-based experimental design with response surface methodology (RSM) was employed to examine the effects of functional conditions on the photoelectrocatalytic oxidation of landfill leachate using a Cu/N co-doped TiO2 (Ti) electrode. The experimental design method was applied to response surface modeling and the optimization of the operational parameters of the photoelectro-catalytic degradation of landfill leachate using TiO2 as a photo-anode. The variables considered were the initial chemical oxygen demand (COD) concentration, pH and the potential bias. Two dependent parameters were either directly measured or calculated as responses: chemical oxygen demand (COD) removal and total organic carbon (TOC) removal. The results of this investigation reveal that the optimum conditions are an initial pH of 10.0, 4377.98mgL(-1) initial COD concentration and 25.0 V of potential bias. The model predictions and the test data were in satisfactory agreement. COD and TOC removals of 67% and 82.5%, respectively, were demonstrated.
Under the optimal conditions, GC/MS showed 73 organic micro-pollutants in the raw landfill leachate which included hydrocarbons, aromatic compounds and esters. After the landfill leachate treatment processes, 38 organic micro-pollutants disappeared completely in the photoelectrocatalytic process. Publication name | PLOS ONE, 12 (7):10.1371/journal.pone.0171234 JUL 3 2017 | Author(s) | Zhou, Xiao; Zhou, Shaoqi; Feng, Xinbin | Corresponding author(s) | ZHOU Shaoqi fesqzhou@scut.edu.cn -Guizhou Acad Sci, Inst Biol, Guiyang, Peoples R China -South China Univ Technol, State Key Lab Subtrop Bldg Sci, Guangzhou, Guangdong, Peoples R China -South China Univ Technol, Coll Environm & Energy, Guangzhou Higher Educ Mega Ctr, Guangzhou, Guangdong, Peoples R China -South China Univ Technol, Key Lab Environm Protect & Ecoremediat, Guangzhou Higher Educ Mega Ctr, Guangdong Regular Higher Educ Inst, Guangzhou, Guangdong, Peoples R China | Author(s) from IGCAS | ZHOU Xiao; FENG Xinbin | View here for the details
|
|
|