仪器网

欢迎您: 免费注册 仪器双拼网址:www.yiqi.com
首页-资讯-资料-产品-求购-招标-品牌-展会-行业应用-社区-供应商手机版
官方微信
中国仪器网• 行业应用
应用首页 解决方案 行业标准
应用
  • 产品
  • 企业
  • 品牌
  • 资料
  • 问答
仪器网/ 行业应用/ 解决方案/ ZetaPALS相位分析光散射原理（PALS）测电位应用案例1

ZetaPALS相位分析光散射原理（PALS）测电位应用案例1

点击这里给我发消息
内容节点
概述
实验/设备条件
样品提取
实验/操作方法
实验结果/结论
仪器/耗材清单
文献名：Aggregation Kinetics of Multiwalled Carbon Nanotubes in Aquatic Systems: Measurements and Environmental Implications

作者：NAVIDB. SALEH, LISAD. PFEFFERLE, AND MENACHEM ELIMELECH
（Department of Chemical Engineering, Yale University, New Haven, Connecticut 06520-8286）

摘要：The initial aggregation kinetics of multiwalled carbon nanotubes (MWNTs) were examined through time-resolved dynamiclight scattering. Aggregation of MWNTs was evaluated by varying solution pH and the concentration of monovalent (NaCl) and divalent (CaCl2 and MgCl2) salts. Suwannee River humic acid (SRHA) was used to study the effect of background natural organic matter on MWNT aggregation kinetics. Increasing salt concentrationandaddition of divalent calciumandmagnesiumions induced MWNT aggregation by suppressing electrostaticrepulsion, similar to observations with aquatic colloidal particles. The critical coagulation concentration (CCC) values for MWNTs were estimated as 25 mM NaCl, 2.6 mM CaCl2, and 1.5 mM MgCl2. An increase in solution pH from acidic (pH 3) to basic (pH 11) conditions resulted in a substantial (over 2 orders of magnitude) decrease in MWNT aggregation kinetics, suggesting the presence of ionizable functional groups on the MWNT carbon scaffold. The presence of humic acid in solution markedly enhanced the colloidal stability of MWNTs, reducing the aggregation rate by nearly 2 orders of magnitude. The enhanced MWNT stability in the presence of humic acid is attributable to steric repulsion imparted by adsorbed humic acid macromolecules. Our results suggest that MWNTs are relatively stable at solution pH and electrolyte conditions typical of aquatic environments.
相关产品
相关解决方案
热门解决方案
最新解决方案
在线留言
关于我们 | 诚聘英才 | 客户投诉 | 本站服务 | 会员中心 | 买家中心 | 期刊 | 会展合作 | 积分商城
仪器网(www.yiqi.com) --专业分析仪器,检测仪器平台,实验室仪器设备交易网,仪器行业专业网络宣传推广媒体。
仪器网(www.yiqi.com)--仪器拼音域名网址,简单,易懂,好记,可信; 符合仪器用户的记忆和使用习惯,是仪器选型采购的专业平台。
销售电话: 400 822 6768 企业销售咨询: 021-68559399 021-68551566 VIP会员售后QQ: 83550177 VIP会员销售QQ: 65884322
网站售后: 021-50353779 综合业务QQ: 11694366 免费企业会员售后QQ: 932545765 展会合作QQ: 784540580 仪器求购QQ: 61224355
Copyright 2004-2024 www.yiqi.com All Rights Reserved. 沪ICP备16012899号 沪B220170422号 互联网药品信息服务资格证书 沪公网安备 31011502008050号

沪公网安备 31011502008050号


若仪器网内容侵犯到您的权益，请及时告诉我们,我们马上修改或删除。邮箱：hezou_yiqi@163.com
官方微信

仪器网微信服务号

扫码获取最新信息


仪器网官方订阅号

扫码获取最新信息

在线客服

咨询客服

在线客服
工作日:  9:00-18:00
联系客服 企业专属客服
电话客服:  400-822-6768
工作日:  9:00-18:00
订阅商机

仪采招微信公众号

采购信息一键获取海量商机轻松掌控