文献类型：期刊文献

英文题名：Suspension stability and aggregation of multi-walled carbon nanotubes as affected by dissolved organic matters extracted from agricultural wastes

作者：Li, Helian[1,2] Qiu, Yanhua[1] Wang, Xiaonuan[1] Liu, Wenhao[1] Chen, Guangcai[2,3] Ma, Yibing[1,4] Xing, Baoshan[2]

第一作者：Li, Helian

通信作者：Li, HL[1];Xing, BS[2]

机构：[1]Univ Jinan, Sch Resources & Environm, Jinan 250022, Peoples R China;[2]Univ Massachusetts, Stockbridge Sch Agr, Amherst, MA 01003 USA;[3]Chinese Acad Forestry, Res Inst Subtrop Forestry, Fuyang 311400, Zhejiang, Peoples R China;[4]Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Natl Soil Fertil & Fertilizer Effects Long Term M, Beijing 100081, Peoples R China

年份：2016

卷号：210

起止页码：323-329

外文期刊名：ENVIRONMENTAL POLLUTION

收录：;EI(收录号：20161202134191);Scopus(收录号：2-s2.0-84961165672);WOS:【SCI-EXPANDED(收录号:WOS:000376703600037)】；

基金：We thank Dr. Yingchen Bai from Chinese Research Academy of Environmental Sciences for his help in measuring the molecular weights of DOM samples. Financial supports are from the National Natural Science Foundation of China (21207049, 21207157), Shandong Provincial Higher Educational Science and Technology Program (J12LC02), China Scholarship Council (201308370004), International Cooperation and Training Program for Outstanding Youth Teachers at Colleges and Universities in Shandong Province, and USDA ARFI (MAS #: 000475).

语种：英文

外文关键词：Carbon nanotubes; Dissolved organic matter; Agricultural waste; Suspension; Aggregation

摘要：Dissolved organic matters (DOMs) extracted from wheat straw (SDOM) and cow manure (MDOM) were used to investigate their effects on the suspension stability and aggregation of multi-walled carbon nanotubes (MWCNTs). Two types of DOM can effectively disperse and stabilize the MWCNTs. At initial MWCNT concentration of 500 mg/L, suspended MWCNT concentration ranged from 8.0 to 17.9 mg/L as DOM were varied from 50 to 200 mg/L dissolved organic carbon (DOC). The critical coagulation concentration (CCC) values were estimated to be 41.4 mM NaCl and 5.3 mM CaCl2 in the absence of DOM. The presence of SDOM and MDOM significantly retarded the aggregation rate of MWCNTs. The CCC values increased to 120 mM NaCl and 14.8 mM CaCl2 at SDOM concentration of 20 mg/L DOC. Due to its higher aromaticity and molecular weight, MDOM showed higher ability to stabilize MWCNTs, with CCC values of 201 mM and 15.8 mM at 20 mg/L DOC. These findings revealed that DOMs originated from agricultural wastes will have great impact on the dispersion and stabilization of MWCNTs, thus their fate in the aquatic environment. (C) 2016 Elsevier Ltd. All rights reserved.