Page 190 - 《精细化工》2021年第7期

·1472· 精细化工 FINE CHEMICALS 第 38 卷

对 Pb(Ⅱ)和 Cu(Ⅱ)的去除率分别降低至 72.13%和 Letters, 2019, 17: 629-654.
[7] MAHDAVINIA G R, SOLEYMANI M, SABZI M, et al. Novel
58.76%，这可能是因为 PVA/SA/KHA/MMT 凝胶球 magnetic polyvinyl alcohol/laponite RD nanocomposite hydrogels
for efficient removal of methylene blue[J]. Journal of Environmental
对 Pb(Ⅱ)和 Cu(Ⅱ)的吸附以螯合作用为主，Pb(Ⅱ) Chemical Engineering, 2017, 5: 2617-2630.
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和 Cu(Ⅱ)对凝胶球上的吸附结合位点存在竞争关系 sodium alginate based sustainable hydrogels for environmental
导致去除率下降。通常吸附剂对金属离子的吸附性 [9] applications[J]. Journal of Cleaner Production, 2018, 198: 143-159.
GAO X P, GUO C, HAO J J, et al. Adsorption of heavy metal ions by
能受有效离子半径及电负性的影响。一般地，吸附 sodium alginate based adsorbent–A review and new perspectives[J].
International Journal of Biological Macromolecules, 2020, 164: 4423-4434.
0
剂对金属离子的吸附性能与有效离子半径正相关， [10] LYU X S, JIANG G M, XUE X Q, et al. Fe -Fe 3O 4 nanocomposites
embedded polyvinyl alcohol/sodium alginate beads for chromium
与金属离子电负性负相关。Pb(Ⅱ)和 Cu(Ⅱ)的有效 (Ⅵ) removal[J]. Journal of Hazardous Materials, 2013, 262: 748-758.
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离子半径分别为 119 和 57 pm，Pb(Ⅱ)和 Cu(Ⅱ)的电 self-healable double network polymer hydrogel as framework for
负性分别为 1.8 和 1.9 [28-29] 。由于 Pb(Ⅱ)的有效离子 nanomaterial[J]. New Journal of Chemistry, 2017, 41(24): 15127-15135.
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半径远大于 Cu(Ⅱ)，Pb(Ⅱ)和 Cu(Ⅱ)的电负性相差 blue removal using a fully biodegradable hydrogel based on starch
immobilized humic acid[J]. Chemical Engineering Journal, 2015,
不大。因此，PVA/SA/KHA/MMT 凝胶球对 Pb(Ⅱ) 268: 348-355.
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有较高的吸附选择性。 physically cross-linked double network polymer hydrogel beads and
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（1）以 PVA 和 H 3 BO 3 ，SA 和 CaCl 2 结合构筑 [15] YANG L F (杨灵芳), LIU Z R (刘峙嵘), WANG Y (王云), et al.
Adsorption performance of thorium(Ⅳ) by insolubilized humic
出双交联凝胶网络，并引入 KHA 和 MMT 成功制备 acid[J]. Fine Chemicals (精细化工), 2018, 35(4): 662-667.
出了一种双交联凝胶球，该凝胶球在对 MB 和 Pb(Ⅱ) [16] MEN X P (门孝平), MENG B (孟波), GUO Q X (郭巧霞), et al.
Preparation and adsorption properties of composites POSS/TX-10/Bent[J].
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（2）吸附过程符合准二级动力学模型，实验数 methylene blue from aqueous solution by magnetic hydroxyapatite-
immobilized oxidized multi-walled carbon nanotubes[J]. Journal of
据与 Langmuir 模型拟合较为吻合。在吸附剂用量为 Colloid and Interface Science, 2017, 494: 380-388.
1.20 g/L，MB 和 Pb(II)溶液的初始 pH 分别为 7 和 5， [18] HU T, LIU Q Z, GAO T T, et al. Facile preparation of tannic
acid−poly(vinyl alcohol)/sodium alginate hydrogel beads for
吸附时间为 240 min，吸附温度为 25℃时，对 MB methylene blue removal from simulated solution[J]. ACS Omega,
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和 Pb(Ⅱ)的理论最大吸附容量分别为 793.65 和 [19] QIAN L W, YANG M X, ZHANG S F, et al. Preparation of a
sustainable bioadsorbent by modifying filter paper with sodium
507.61 mg/g。热力学结果表明，PVA/SA/KHA/MMT alginate, with enhanced mechanical properties and good adsorption
of methylene blue from wastewaters[J]. Cellulose, 2018, 25: 2021-2036.
的吸附过程是自发吸热的，并且是由系统总体熵的 [20] HE J J (贺娇娇), YANG X L (杨兴林), LIU M (刘萌), et al.
增加所驱动。另外，FTIR 和 XPS 结果表明，PVA/ Preparation of cellulose membrane with high adsorption capacity and
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（3）吸附选择性实验表明，PVA/SA/KHA/MMT the adsorption behavior of metal lead ions by attapulgite-induced
对 MB 和 Pb(Ⅱ)具有较高的吸附选择性。 经过 5 porous nanocomposite hydrogels[J]. Journal of Chemical & Engineering
Data, 2018, 63: 4241-4247.
次循环使用后，PVA/SA/KHA/MMT 对 MB 和 Pb(Ⅱ) [23] MENG Y Q, ZHANG G, YE L. In situ crosslinking of poly(vinyl
alcohol)/graphene oxide nano-composite hydrogel: Intercalation
的去除率分别为 85.84%和 56.25%，PVA/SA/KHA/ structure and adsorption mechanism for advanced Pb(Ⅱ) removal[J].
Journal of Polymer Research, 2018, 168: 1-14.
MMT 是一种具有应用潜力的吸附材料。 [24] FAN L H, LU Y Q, YANG L Y, et al. Fabrication of polyethylenimine-
functionalized sodium alginate/cellulose nanocrystal/polyvinyl alcohol
参考文献： core–shell microspheres [(PVA/SA/CNC)@PEI] for diclofenac
sodium adsorption[J]. Journal of Colloid and Interface Science, 2019,
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