Page 175 - 《精细化工》2021年第7期
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第 7 期 雷增江,等: 铝污泥基复合凝胶球对 Cr(Ⅵ )的吸附性能与机理 ·1457·
来应用在工业化水处理领域可考虑以下方面:加入
磁性还原类材料,可提高去除性能,并利用外部磁
场进行回收、循环利用,减少吸附剂的损失;选取
对环境无毒害的交联剂和高效解吸剂,防止二次污
染的产生;未来可制备具有蜂窝状的孔结构污泥基
凝胶球材料,以高效吸附溶液中的污染物。
参考文献:
[1] NOROUZI S, HEIDARI M, ALIPOUR V, et al. Preparation,
characterization and Cr(Ⅵ ) adsorption evaluation of NaOH-activated
carbon produced from Date Press Cake: An agro-industrial waste[J].
Bioresour Technol, 2018, 258: 48-56.
[2] HUANG X X, LIU Y G, LIU S B, et al. Effective removal of Cr( ) Ⅵ
using β-cyclodextrin-chitosan modified biochars with adsorption/
reduction bifuctional roles[J]. RSC Advances, 2016, 6(1): 94-104.
[3] KUMAR A, JENA H M. Adsorption of Cr(Ⅵ ) from aqueous phase
by high surface area activated carbon prepared by chemical activation
with ZnCl 2[J]. Process Safety and Environmental Protection, 2017,
109: 63-71.
[4] XU J L (徐建玲), ZHANG D (张頔), NIE M Q (聂苗青), et al.
6+
Adsorption of Cr on polyethyleneimine-functionalized straw biochar
from aqueous solution[J]. Chemical Journal of Chinese Universities
(高等学校化学学报), 2020, 41(1): 155-161.
a—全谱图;b—吸附后的 Cr 2p 谱图;c—吸附前后 N 1s 谱图; [5] TIE J X, CHEN D, WAN Y J, et al. Adsorption removal of phosphorus
d—吸附前后的 Fe 2p 谱图;e—吸附前后的 Al 2p 谱图 from aqueous solution by heat-activated alum sludge[J]. Asian Journal
图 11 AS-GEL 吸附 Cr(Ⅵ)前后的 XPS 谱图 of Chemistry, 2013, 25(16): 9129-9134.
Fig. 11 XPS spectra of AS-GEL before and after Cr(Ⅵ) [6] HAN Y (韩芸), HU Y J (胡玉洁), LIAN J (连洁), et al. Phosphorus
adsorption removal performance and mechanism of modified zeolite using alum
sludge acidified extraction liquid[J]. Environmental Science (环境科
学), 2019, 40(8): 3660-3667.
3 结论 [7] ZHAO X H, ZHAO Y Q, WANG W K, et al. Key issues to consider
when using alum sludge as substrate in constructed wetland[J]. Water
(1)通过 SEM、FTIR 分析材料的微观结构和 Science & Technology, 2015, 71(12): 1775-1782.
[8] MAQBOOL N, KHAN Z, ASGHAR A. Reuse of alum sludge for
官能团组分。与 AS 相比,AS-GEL 的表面结构发生
phosphorus removal from municipal wastewater[J]. Desalination and
明显变化,表面具有均匀的层状凸起,羟基、氨基 Water Treatment, 2016, 57(28): 13246-13254.
等官能团数量增加。通过 FTIR、XPS 分析,参与反 [9] WANG Y Q, FENG Y, ZHANG X F, et al. Alginate-based attapulgite
foams as efficient and recyclable adsorbents for the removal of heavy
应基团有氨基、羟基、羧基及 AS-GEL 的硅氧键, metals[J]. Journal of Colloid and Interface Science, 2018, 514: 190-
其主要机理有质子化基团对 Cr(Ⅵ)的静电吸附及还 198.
原作用,还原后的 Cr(Ⅲ)可被活性基团吸附。 [10] ZENG H P (曾辉平), WANG F S (王繁烁), YU Y P (于亚萍), et al.
Preparation of chitosan-alginate adsorbent contained Fe-Mn sludge
(2)单因素实验结果表明,pH=4、投加量为 and its potential for As(Ⅴ ) removal[J]. China Environmental Science
1.2 g/L、温度为 35 ℃、吸附时间为 120 min,AS-GEL (中国环境科学), 2020, 40(3): 1146-1155.
[11] YAO W H (姚温浩), YU F (于飞), MA J (马杰). Preparation of
对 Cr(Ⅵ)的最大吸附量为 73.364 mg/g。准一级动力
alginate composite gel and its application in water treatment[J].
学方程和准二级动力学方程均可以良好地拟合实验 Progress in Chemistry (化学进展), 2018, 30(11): 1722-1733.
数据,吸附过程同时存在物理和化学作用。AS-GEL [12] DAI X H, ZHANG S X, WATERHOUSE G I N, et al. Recyclable
polyvinyl alcohol sponge containing flower-like layered double
对 Cr(Ⅵ)的吸附行为可由 Langmuir 更好地描述。共存 hydroxide microspheres for efficient removal of As(Ⅴ ) anions and
–
–
3–
阴离子影响大小顺序为 PO 4 >NO 3 >Cl 。通过 5 次吸 anionic dyes from water[J]. Journal of Hazardous Materials, 2019,
附-解吸实验,其吸附量保持初次吸附量的 89.71%, 367: 286-292.
[13] VATANPOUR V, SALEHI E, SAHEBJAMEE N, et al. Novel chitosan/
AS-GEL 可重复利用于对 Cr(Ⅵ)的吸附。 polyvinyl alcohol thin membrane adsorbents modified with detonation
(3)利用铝污泥作为基体,混合海藻酸钠和聚 nanodiamonds: Preparation, characterization, and adsorption
performance[J]. Arabian Journal of Chemistry, 2020, 13(1): 1731-
乙烯醇形成胶溶液,制备出三维立体的凝胶球吸附
1740.
剂(AS-GEL)。相比于其他粉末污泥吸附剂其具有 [14] MEDINA L, CAROSIO F, BERGLUND L A. Recyclable
高效、固液易分离、相对环保等优势,为污泥基材 nanocomposite foams of poly(vinyl alcohol), clay and cellulose
nanofibrils-Mechanical properties and flame retardancy[J]. Composites
料去除水体重金属污染物提供了一定的理论参考。
Science and Technology, 2019, 182:107762.
(4)由于凝胶球吸附材料处在实验室阶段,未 [15] ZHANG H, OMER A M, HU Z H, et al. Fabrication of magnetic