Novel maricultural-solid-waste derived biochar for removing eutrophic nutrients and enrofloxacin: Property, mechanism, and application assessment
文献类型： 外文期刊
作者： Wu, Lele 1 ; Ren, Liping 1 ; Li, Jun 2 ; Li, Xian 1 ; Yang, Shengmao 3 ; Song, Yuanzhao 4 ; Li, Xiangping 5 ;
作者机构： 1.Ocean Univ China, Fisheries Coll, Key Lab Mariculture, Minist Educ, Qingdao 266001, Peoples R China
2.Chinese Acad Sci, Inst Oceanol, Key Lab Expt Marine Biol, Qingdao 266071, Peoples R China
3.Zhejiang Acad Agr Sci, Inst Environm Resource Soil & Fertilizer, 298 Desheng Middle Rd, Hangzhou 310021, Peoples R China
4.Shandong Marine Resource & Environm Res Inst, Yantai 264006, Peoples R China
5.Shandong Univ Sci & Technol, Coll Chem & Biol Engn, Qingdao 266590, Shandong, Peoples R China
关键词： Biochar; Maricultural solid waste; Property; Nutrients removal; Adsorption kinetics
期刊名称：JOURNAL OF HAZARDOUS MATERIALS （ 影响因子：14.224； 五年影响因子：12.984 ）
ISSN： 0304-3894
年卷期： 2022 年 427 卷
页码：
收录情况： SCI
摘要： Land-based seawater aquaculture accompanied by high stocking density usually involves producing excess eutrophic nutrients, residual baits, excrement, and antibiotics. Because of limited technology and salinity, proper and efficient treatment of these wastes is still an unsolved issue. In this study, the feasibility of maricultural fish residual bait and excrement-derived biochar as water pollutant remover and saline-alkaline soil amendment were firstly assessed. The biochar was pyrolyzed at 300, 500, 700, 800, 900 celcius (marked as BC300, BC500, BC700, BC800, BC900) and modified by zirconium or iron (BC700-Zr or BC700-Fe). BC700-Zr had the highest specific surface area. BC700-Zr and BC700-Fe exhibited higher nitrogen removal efficiency. The biochars exhibited nitrogen and phosphate desorption, while we observed no obvious phosphate desorption in BC700-Zr or BC700-Fe. Adsorption kinetics analysis indicated that adsorption processes of nitrate, nitrite and enrofloxacin were consistent with pseudo-second-order model, while ammonium and phosphate adsorption processes fitted pseudo-first-order model better. The biochar showed nitrogen and phosphate nutrients release effects, indicating potential application in saline-alkaline soil improvement. Multi-linear regression analysis indicated that nitrogen
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