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3种表面修饰活性炭对水体中磷的吸附

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张莹, 张程, 谭琲琳, 张梦娇, 王生丽, 王莉淋. 3种表面修饰活性炭对水体中磷的吸附[J]. 环境工程学报, 2018, 12(5): 1346-1354. doi: 10.12030/j.cjee.201709074
引用本文: 张莹, 张程, 谭琲琳, 张梦娇, 王生丽, 王莉淋. 3种表面修饰活性炭对水体中磷的吸附[J]. 环境工程学报, 2018, 12(5): 1346-1354. doi: 10.12030/j.cjee.201709074
shu
ZHANG Ying, ZHANG Cheng, TAN Beilin, ZHANG Mengjiao, WANG Shengli, WANG Lilin. Adsorption of phosphate from water to three kinds of surface modified activated carbons[J]. Chinese Journal of Environmental Engineering, 2018, 12(5): 1346-1354. doi: 10.12030/j.cjee.201709074
Citation: ZHANG Ying, ZHANG Cheng, TAN Beilin, ZHANG Mengjiao, WANG Shengli, WANG Lilin. Adsorption of phosphate from water to three kinds of surface modified activated carbons[J]. Chinese Journal of Environmental Engineering, 2018, 12(5): 1346-1354. doi: 10.12030/j.cjee.201709074
shu

3种表面修饰活性炭对水体中磷的吸附

  • 1.

    四川农业大学环境学院，四川省农业环境工程重点实验室，成都 611130

  • 2.

    四川农业大学资源学院，成都611130

  • 基金项目:

    国家自然科学基金资助项目（21307085）

    四川省科技计划项目（2017SZ0039）

Adsorption of phosphate from water to three kinds of surface modified activated carbons

  • 1.

    Sichuan Key Laboratory of Agricultural Environmental Engineering, College of Environmental Sciences, Sichuan Agricultural University, Chengdu 611130, China

  • 2.

    College of Resources, Sichuan Agricultural University, Chengdu 611130, China

  • Fund Project:

  • 摘要: 为克服活性炭磷吸附能力有限的问题，使用ZnCl2、十六烷基三甲基氯化铵（CTAC）和Fe/Al（氢）氧化物纳米颗粒分别研究了物理结构法、表面活性剂法和载体法3 种表面修饰方法对活性炭磷吸附能力的影响。实验发现，载体法为3 种方法中最好的修饰方法。对载体法制备吸附剂的材料用量的比较发现，在Fe（III）和Al（III）摩尔比为9 ：1 的条件下，把1.5 g活性炭加入到总浓度为1 mol·L-1的200 mL Fe(III)和Al(III)混合溶液中，形成的纳米Fe/Al（氢）氧化物能够较好地利用活性炭表面，该复合材料1.5AC-Fe/Al在磷平衡浓度约为50 mg·L-1时吸附量达到29.3mg·g-1。该材料表征结果表明，纳米Fe/Al（氢）氧化物颗粒被成功负载在活性炭表面。在酸性条件下，复合材料表面的—H+和—OH2+所引起的静电吸附和配位交换是促进吸附带负电磷酸根离子的原因。
    Abstract: In order to improve the phosphate adsorption ability of activated carbon (AC),AC was modified by activator method, surfactant method and carrier method through treating with activator (ZnCl2), hexadecyl trimethyl ammonium chloride (CTAC) and Fe/Al (hydr)oxide nanoparticles, respectively. The results showed that carrier method was the best one among the tested methods. Through the comparison of different material ratios in the adsorbent preparation of carrier method, it was found that when the molar ratio of Fe(III) and Al(III) was 9:1, and when 1.5 g activated carbon was added into 200 mL of 1 mol·L-1 Fe(III) and Al(III) solution, Fe/Al (hydr)oxide nano particles could make good use of AC surface. The adsorption amount could reach 29.3 mg·g-1 for 1.5AC-Fe/Al when the equilibrium concentration of phosphate was around 50 mg·L-1. The results of SEM and XRD demonstrated that Fe/Al (hydr)oxide nanoparticles were loaded successfully on the surface of AC. Under acidic condition, electrostatic adsorption and ligand exchange caused by the existence of –H+ and –OH2+ on the surface of the composite material were responsible for the enhanced adsorption of negative charged phosphate.
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  • 刊出日期:  2018-05-19

3种表面修饰活性炭对水体中磷的吸附

  • 1. 四川农业大学环境学院，四川省农业环境工程重点实验室，成都 611130
  • 2. 四川农业大学资源学院，成都611130
基金项目:

国家自然科学基金资助项目（21307085）

四川省科技计划项目（2017SZ0039）

摘要: 为克服活性炭磷吸附能力有限的问题，使用ZnCl2、十六烷基三甲基氯化铵（CTAC）和Fe/Al（氢）氧化物纳米颗粒分别研究了物理结构法、表面活性剂法和载体法3 种表面修饰方法对活性炭磷吸附能力的影响。实验发现，载体法为3 种方法中最好的修饰方法。对载体法制备吸附剂的材料用量的比较发现，在Fe（III）和Al（III）摩尔比为9 ：1 的条件下，把1.5 g活性炭加入到总浓度为1 mol·L-1的200 mL Fe(III)和Al(III)混合溶液中，形成的纳米Fe/Al（氢）氧化物能够较好地利用活性炭表面，该复合材料1.5AC-Fe/Al在磷平衡浓度约为50 mg·L-1时吸附量达到29.3mg·g-1。该材料表征结果表明，纳米Fe/Al（氢）氧化物颗粒被成功负载在活性炭表面。在酸性条件下，复合材料表面的—H+和—OH2+所引起的静电吸附和配位交换是促进吸附带负电磷酸根离子的原因。

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