文献类型：期刊文献

英文题名：Turn waste to wealth: Modification of coconut shells and waste diatomite from brewery for efficient adsorption of polycyclic aromatic hydrocarbons (PAHs) in seawater

作者：Lu, Zhiyang[1];Chen, Zhuo[1];Tian, Weijun[1,2];Li, Chenchen[3];Zou, Mengyuan[1];Zhang, Ruijuan[1];Yang, Ke[1];Bao, Mutai[4]

机构：[1]Ocean Univ China, Coll Environm Sci & Engn, Qingdao 266100, Peoples R China;[2]Minist Educ, Key Lab Marine Environm & Ecol, Qingdao 266100, Peoples R China;[3]East China Univ Sci & Technol, Coll Mat Sci & Engn, Shanghai 200237, Peoples R China;[4]Ocean Univ China, Coll Chem & Chem Engn, Qingdao 266100, Peoples R China

年份：2025

卷号：362

外文期刊名：SEPARATION AND PURIFICATION TECHNOLOGY

收录：;EI(收录号：20250417764627);WOS:【SCI-EXPANDED(收录号:WOS:001421869800001)】；

基金：This work was supported by the National Natural Science Foundation of China (Grant No. 51979255) and the Natural Science Foundation of Shandong Province, China (Grant No. ZR2024MD090) .

语种：英文

外文关键词：Polycyclic aromatic hydrocarbons; Adsorption mechanism; Diatomite; Biochar; Seawater

摘要：Polycyclic aromatic hydrocarbons (PAHs) enter marine ecosystems, posing risks to human health and the environment. This study investigated the adsorption properties of phenanthrene (Phe), pyrene (Pyr), and benzo [a]pyrene (BaP) from seawater using an efficient adsorbent made from brewery waste diatomite and coconut shells. The optimal adsorbent was produced by calcining at 700 degrees C for 2 h with a 4:1 diatomite to coconut shell ratio. Under optimal conditions (0.4 g/L of dosage, pH = 7, salinity = 30, 9 mg/L of dissolved oxygen), removal rates reached 92.81 % for Phe, 96.93 % for Pyr, and 99.48 % for BaP. Adsorption mechanisms were analyzed through kinetics, thermodynamics, and density functional theory, revealing both physical interactions (pore filling, electrostatic interactions, hydrophobic effects) and chemical interactions (it-it interaction, functional group action, complexation reaction). Tests in actual seawater confirmed that the adsorbent effectively captures up to 85 %-95 % of PAHs during sedimentation, sequestering them in the seabed. This work presents a novel, eco-friendly solution for PAHs removal from seawater, contributing to water treatment and resource utilization.