Chemical activation of phosphogypsum exhibits enhanced adsorption of malachite green from aqueous solution due to porosity refinement  

作　　者：Anurag Panda Anuradha Upadhyaya Ramesh Kumar Argha Acooli Shirsendu Banerjee Amrita Mishra Moonis Ali Khan Somnath Chowdhury Byong-Hun Jeon Sankha Chakrabortty Suraj K.Tripathy 

机构地区：[1]School of Chemical Technology,Kalinga Institute of Industrial Technology,Bhubaneswar 751024,India [2]Department of Earth Resources&Environmental Engineering,Hanyang University,Seoul 04763,Republic of Korea [3]School of Biotechnology,Kalinga Institute of Industrial Technology,Bhubaneswar 751024,India [4]Department of Chemistry,College of Science,King Saud University,Riyadh 11451,Saudi Arabia [5]Department of Chemical Engineering,National Institute of Technology,Durgapur 713209,West Bengal

出　　处：《Frontiers of Chemical Science and Engineering》2024年第11期157-177,共21页化学科学与工程前沿（英文版）

基　　金：Ministry of Mines of the Government of India(Grant No.Met4-14/15/2022);Moonis Ali Khan acknowledges financial support through the Researchers Supporting Project(Grant No.RSP2024R345);King Saud University,Riyadh,Saudi Arabia.Ramesh Kumar acknowledges financial support through the Creative and Challenging Research Program(Grant No.2021R1I1A1A01060846)of the National Research Foundation(NRF)of the Republic of Korea.

摘　　要：Owing to its uncomplicated synthetic methodology and exorbitant market demand,malachite green is widely used in numerous industries,particularly as a fungicide in aquaculture.Considering its intrinsic toxicity and potential long-term health impacts,deployable and cost-effective strategies must be developed for eliminating water-soluble malachite green.In this study,chemically activated phosphogypsum,a byproduct of fertilizer production,was used to remove malachite green from an aqueous system.Due to its low cost and abundance,the use of phosphogypsum as a sorbent material may significantly reduce the cost of adsorption-based processes.Moreover,its structural durability allows efficient recycling without significant deformation during reactivation.However,untreated phosphogypsum exhibits minimal efficiency in adsorbing synthetic dyes due to its unfavorable surface chemistry.Our investigation revealed that Zn activation induced a noticeable increase in pore volume from 0.03 to 0.06 cm3·g^(-1).A 60 mg·L^(-1) sorbent dose,pH 7,150 r·min^(-1),and operational temperature of 30°C produced 99%quantitative sorption efficiency.Response surface methodology and artificial neural network were used to optimize process parameters by validating experimental values.No detectable toxicity was observed in Escherichia coli when exposed to the treated water.

关 键 词：malachite green operating conditions optimization PHOSPHOGYPSUM SORPTION water treatment 

分 类 号：O647.3[理学—物理化学] X703[理学—化学]