[1]陈冬,张凤娥,相金钢,等.氨基嫁接复合高岭土对含铜废水吸附性能研究[J].常州大学学报(自然科学版),2022,34(02):28-37.[doi:10.3969/j.issn.2095-0411.2022.02.004]
　CHEN Dong,ZHANG Feng'e,XIANG Jingang,et al.Adsorption Performance of Amino-Grafted Kaolin for Copper-Containing Wastewater[J].Journal of Changzhou University(Natural Science Edition),2022,34(02):28-37.[doi:10.3969/j.issn.2095-0411.2022.02.004]
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氨基嫁接复合高岭土对含铜废水吸附性能研究()
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常州大学学报(自然科学版)[ISSN:2095-0411/CN:32-1822/N]

卷:
第34卷
期数:
2022年02期
页码:
28-37
栏目:
环境科学与工程
出版日期:
2022-03-28

文章信息/Info

Title:
Adsorption Performance of Amino-Grafted Kaolin for Copper-Containing Wastewater
文章编号:
2095-0411(2022)02-0028-10
作者:
陈冬1; 张凤娥1; 相金钢1; 熊秋秋1; 蔡天皓2
(1.常州大学环境与安全工程学院,江苏常州213164;2.联泓新材料科技股份有限公司,江苏常州213164)
Author(s):
CHEN Dong1;  ZHANG Feng'e1;  XIANG Jingang1;  XIONG Qiuqiu1;  CAI Tianhao2
(1.School of Environmental & Safety Engineering, Changzhou University, Changzhou 213164, China; 2.Levima Advanced Materials Co., Ltd., Changzhou 213164, China)
关键词:
高岭土;  吸附;  重金属;  双氨基改性
Keywords:
kaolin;  adsorption;  heavy metals;  diamino modification
分类号:
X 522
DOI:
10.3969/j.issn.2095-0411.2022.02.004
文献标志码:
A
摘要:
针对有色金属冶炼产生的含铜废水,以天然高岭土为主原材料经500 ℃ 煅烧后,与天然沸石复合,通过正交试验确定煅烧质量比为2:1的高岭土与天然沸石,利用N-2-氨乙基-3-氨丙基三甲氧基硅烷偶联剂(KH792)对复合样品进行改性,得到改性复合高岭土吸附剂,采用XRD,SEM,BET,FT-IR,Zeta电位进行改性前后表征,发现KH792中的氨基官能团成功嫁接到复合高岭土表面,经过改性后的复合高岭土的比表面积由9.522 m2/g增加到13.517 m2/g,孔径由10.022 nm扩大到15.143 nm。利用改性复合高岭土对Cu2+进行吸附性能及其影响因素的研究,通过研究确定,试验水样Cu2+质量浓度为60 mg/L,在25 ℃、pH为5.45的条件下,改性复合高岭土投加量为3.3 g/L,吸附120 min,去除率最高可达99.96%。吸附过程遵守准二级动力学模型,吸附等温线与Langmuir模型对应。此改性满足含铜废水的排放标准,为吸附材料提供了一种便捷、经济、安全的选择。
Abstract:
Aiming at the copper-containing wastewater produced by non-ferrous metal smelting, natural kaolin is used as the main raw material after being calcined at 500 °C and then compounded with natural zeolite. The orthogonal test determines that the calcined kaolin is compounded with natural zeolite in a 2:1 ratio, using N-2-aminoethyl the composite sample was modified with 3-aminopropyltrimethoxysilane coupling agent(KH792)to obtain a modified composite kaolin adsorbent. It was characterized by XRD, SEM, BET, FT-IR, Zeta potential before and after modification, and it was found that KH792 the amino functional group in the composite kaolin was successfully grafted onto the surface of the composite kaolin. The specific surface area of the modified composite kaolin was increased from 9.522 m2/g to 13.517 m2/g, and the pore size was expanded from 10.022 nm to 15.143 nm. The modified composite kaolin was used to study the adsorption performance of Cu2+ and its influencing factors. It was determined through research that the Cu2+ concentration of the test water sample was 60 mg/L, and the modified kaolin was cast at 25 °C and pH 5.45. The amount is 3.3 g/L, the adsorption is 120 min, and the removal rate can reach 99.96%. The adsorption process follows the quasi-second-order kinetic model, and the adsorption isotherm corresponds to the Langmuir model. This modification meets the discharge standard of copper-containing wastewater and provides a convenient, economic and safe choice for adsorption materials.

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(责任编辑:李艳)

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备注/Memo

备注/Memo:
收稿日期: 2021-10-19。
基金项目: 2014龙城英才项目第六批领军人才优先支持项目(2014150)。
作者简介: 陈冬(1995—), 男, 江苏淮安人, 硕士生。 通信联系人: 张凤娥(1964—), E-mail: zfelzh@cczu.edu.cn
更新日期/Last Update: 1900-01-01