Preparation of a novel lactose-lignin hydrogel catalyst with self-reduction capacity for nitrogenous wastewater treatment  

作　　者：Fan Zhang Yanzhu Guo Xianhong Wu Ce Gao Qingda An Zhongjian Tian Runcang Sun 

机构地区：[1]Key Laboratory of Pulp and Paper Science&Technology of Ministry of Education,Qilu University of Technology,Shandong Academy of Sciences,Jinan 250353,China [2]The Liaoning Province Key Laboratory of Paper and Pulp Engineering,The Dalian Key Laboratory of High Value Application and Development of Botanical Resources,The Key Laboratory of High Value Utilization of Botanical Resources of China Light Industry,Dalian Polytechnic University,Dalian 116034,China

出　　处：《Frontiers of Chemical Science and Engineering》2024年第9期25-36,共12页化学科学与工程前沿（英文版）

基　　金：support from the National Natural Science Foundation of China(Grant Nos.21776026 and 22075034);Liaoning Revitalization Talents Program(Grant No.XLYC1902037);the Foundation of Key Laboratory of Pulp and Paper Science&Technology of Ministry of Education,Qilu University of Technology(Shandong Academy of Sciences)(Grant No.KF202114);Dalian high level talent innovation support program(Dalian Youth Science and Technology Star Project Support Program)(Grant No.2023RQ043).

摘　　要：A novel carboxylated lactose/sodium lignosulfonate/polyacrylic acid hydrogel composites with self-reduction capacity was successfully synthesized by self-assembly method.The hydrogel with well-developed porous structure provided abundant anchoring points and reduction capacity for transforming Ag^(+)into silver nanoparticles.Silver nanoparticles dispersed among the network of hydrogel and the composites exhibited catalytic capacity.The catalytic performance was evaluated via degradation of p-nitrophenol,rhodamine B,methyl orange and methylene blue,which were catalyzed with corresponding reaction rate constants of 0.04338,0.07499,0.04891,and 0.00628 s^(–1),respectively.In addition,the catalyst exhibited stable performance under fixed-bed condition and the corresponding conversion rate still maintained more than 80%after 540 min.Moreover,the catalytic performance still maintained effective in tap water and simulated seawater.The catalytic efficiency still remained 99.7%with no significant decrease after 8 cycles.

关 键 词：carboxylated lactose Ag NPs self-reduction nitrogenous wastewater 

分 类 号：X703[环境科学与工程—环境工程] TQ427.26[化学工程]