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投稿时间：2022-08-02 修订日期：2022-08-02 录用日期：2022-08-09 网络发布日期：2022-09-16
投稿时间：2022-08-02 修订日期：2022-08-02 录用日期：2022-08-09 网络发布日期：2022-09-16
中文摘要: 采用自制铁基生物絮凝剂（BPFS）对羧甲基壳聚糖(CMC)进行改性，并研究其对废水中氟的去除。考察了羧甲基壳聚糖CMC/Fe质量比、BPFS-CMC投加量、pH、反应时间对氟离子去除效果的影响。结果表明，水中残余氟离子浓度随CMC/Fe质量比升高而升高；随改性羧甲基壳聚糖投加量的增加而降低，而且与羧甲基壳聚糖单独处理含氟废水相比，氟离子去除效果有明显提高，当BPFS-CMC投加量为3%（体积分数）时，氟离子去除率由33.05%提高到62.70%；酸性条件有利于氟离子的去除；随反应时间的增加，氟离子浓度缓慢下降。当羧甲基壳聚糖CMC/Fe质量比为0.05，投加量3%，pH=5，反应时间10 min时，水中残余氟离子浓度为7.78 mg/L，低于国家《铅、锌工业污染物排放标准》(GB 25466—2010)规定的限值。
Abstract:Removal of fluoride from wastewater with carboxymethyl chitosan (CMC) modified by self-prepared iron-bioflocculant(BPFS) was investigated. The effects of mass ratio of CMC to iron-bioflocculant(CMC/Fe), BPFS-CMC dosage, pH value, and reaction time on removal of fluoride ions were studied. The results show that the residual fluoride concentration rises with the increase of CMC/Fe, and drops with the increase of BPFS-CMC dosage. The removal rate of fluoride can be greatly improved compared with adding CMC alone, increasing from 33.05% to 62.70% with the BPFS-CMC dosage of volume fraction of 3%. Acidic conditions are favorable for removal of fluoride ions. The concentration of residual fluoride ions drops slowly with the increase of reaction time. The optimum conditions for fluoride removal are as follows: CMC/Fe is 0.05, BPFS-CMC dosage is 3%(volume fraction), pH value is 5, and reaction time is 10 minutes. The residual concentration of fluoride is 7.78 mg/L under the above conditions, which is less than the Emission Standards of Pollutants for Lead and Zinc Industry(GB 25466—2010).
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基金项目:国家重点研发计划项目（2020YFC1909204）
| 作者 | 单位 | |
| 苗雨 | 矿冶科技集团有限公司 | 491637611@qq.com |
| 林星杰 | 矿冶科技集团有限公司 | |
| 罗纯 | 河池市南丹生态环境局 | |
| 张弛* | 矿冶科技集团有限公司 | 1150890987@qq.com |
| Author Name | Affiliation | |
| MIAO Yu | BGRIMM Technology Group | 491637611@qq.com |
| LIN Xing-jie | ||
| LUO Chun | ||
| ZHANG Chi | BGRIMM Technology Group | 1150890987@qq.com |
引用文本：
苗雨,林星杰,罗纯,张弛.改性羧甲基壳聚糖的制备及其去除冶炼废水中的氟[J].有色金属（冶炼部分）,2022(10):141-147.
MIAO Yu,LIN Xing-jie,LUO Chun,ZHANG Chi.Preparation of Modified Carboxymethyl Chitosan and Its Removal of Fluorine from Smelting Wastewater[J].Nonferrous Metals (Extractive Metallurgy),2022(10):141-147.
苗雨,林星杰,罗纯,张弛.改性羧甲基壳聚糖的制备及其去除冶炼废水中的氟[J].有色金属（冶炼部分）,2022(10):141-147.
MIAO Yu,LIN Xing-jie,LUO Chun,ZHANG Chi.Preparation of Modified Carboxymethyl Chitosan and Its Removal of Fluorine from Smelting Wastewater[J].Nonferrous Metals (Extractive Metallurgy),2022(10):141-147.
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