文献类型：期刊文献

英文题名：Removal of U(vi) from aqueous solutions by an effective bio-adsorbent from walnut shell and cellulose composite-stabilized iron sulfide nanoparticles

作者：Hu, Zhengfeng[1,2];Wang, Huifang[1];Liu, Renrong[1];Hu, Baowei[1];Qiu, Muqing[1]

机构：[1]Shaoxing Univ, Sch Life Sci, Huancheng West Rd 508, Shaoxing 312000, Peoples R China;[2]Ecoenvrionmental Sci & Res Inst Zhejiang Prov, Hangzhou 310007, Peoples R China

年份：2022

卷号：12

期号：5

起止页码：2675

外文期刊名：RSC ADVANCES

收录：SCI-EXPANDED(收录号：WOS:000744563900001)、、EI(收录号：20220511582951)、Scopus(收录号：2-s2.0-85123868028)、WOS

基金：This research was supported by the Zhejiang Provincial Natural Science Foundation of China (LGF20C030001). The authors are very grateful for the support.

语种：英文

外文关键词：Adsorption - Agglomeration - Cellulose - Chemical stability - Hydrogen bonds - Ion exchange - Ions - Isotherms - Nanoparticles - Solutions - Synthesis (chemical)

外文摘要：FeS nanoparticles were easily aggregated and oxidized in the natural environment. It was important to stabilize the iron sulfide nanoparticle composite with a stabilizer. Biochar could be used as an effective carrier to inhibit the agglomeration and oxidization of FeS nanoparticles. An efficient and novel bio-adsorbent (CFeS-WS) from walnut shell (WS) and cellulose composites-stabilized iron sulfide nanoparticle was synthesized by the modified method. The removal of U(vi) ions from an aqueous solution by CFeS-WS was carried out. The experimental results indicated that numerous functional groups were observed on the surface of CFeS-WS. In addition, the biochar was loaded successfully with cellulose and FeS nanoparticle composites. The cellulose and biochar effectively prevented the agglomeration of FeS nanoparticles. The adsorption process of U(vi) ions by CFeS-WS was more consistent with the pseudo second-order kinetic model and Langmuir isotherm model. The adsorption process of U(vi) ions was an endothermic and chemical reaction process. The proposed reaction mechanism of the U(vi) ion removal by CFeS-WS mainly consisted of the ion exchange reaction, reduction reaction, hydrogen bonding and functional group, and pore of the adsorbent filling. According to the results of the recycle experiment, it indicated that the chemical stability of CFeS-WS was good.