PubMed | Beijing Normal University, Beijing Institute of Technology and Shandong Century Sunshine Paper Group Co.
Type: | Journal: Chemosphere | Year: 2016
Polycyclic aromatic hydrocarbons (PAHs) are an important class of water pollutants because of their known ecological and human toxicity. Electrocoagulation (EC) is a promising technology for mitigating industrial wastewater pollution, but the removal and transformation of PAHs during EC treatment has not yet been understood. Therefore, a paper-making wastewater effluent (PMWW) was employed in this study to investigate the relationship between PAHs removal and transformation during EC treatment. The results show that 86% of PAHs were effectively removed not only by the electro-oxidation reactions, but also by adsorption onto Fe hydroxide flocs. The removal and transformation of PAHs were related to the number of rings in their structures. Some PAHs composed of two aromatic rings (e.g., naphthaline and dimethylnaphthalene) were produced from humic acid-like and fulvic acid-like organics in PMWW, while PAHs with three to four rings were degraded, thus being removed efficiently. Therefore, PAH transformation during EC treatment exerted double-sided effects on the removal of PAHs; the net effect appeared to be positive. Overall, this study revealed the existence and importance of PAH transformation during EC treatment and provided useful guidance for pulp and paper mills to improve the design and operation of wastewater treatment facilities.
Xu H.-M.,Shandong Century Sunshine Paper Group Co. |
Liu M.-Z.,Shandong Century Sunshine Paper Group Co.
Chung-kuo Tsao Chih/China Pulp and Paper | Year: 2014
Based on the theory of specific edge load, low intensity beating was implemented by optimizing the plate of the refiner. Application of low intersity beating in OCC recycling could largely maintain the length and strength of the fiber, increase the fibrillation of the fiber. The aim of improving quality of the pulp and reducing energy consumption greatly was reached in the beating of OCC.
Jia W.-L.,Shandong Century Sunshine Paper Group Co. |
Yu J.-J.,Shandong Century Sunshine Paper Group Co. |
Zhang Y.-F.,Shandong Century Sunshine Paper Group Co.
Chung-kuo Tsao Chih/China Pulp and Paper | Year: 2015
The working principle of TSO tester and its advantages and correlation with ordinary strength tester were introduced, and the application of TSO tester in adjustment of cross probile of paper machine and paper quality control was discussed. ©, 2015, China Technical Association of Paper Industry. All right reserved.