Utilization of biochar sorbents for Cd2+, Zn2+, and Cu2+ ions separation from aqueous solutions: comparative study
Utilization of biochar sorbents for Cd2+, Zn2+, and Cu2+ ions separation from aqueous solutions: comparative study
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DOI：
10.1007/s10661-014-4093-y
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发表时间：
2015-01-01
影响因子：
3
通讯作者：
Packova, Alena
中科院分区：
文献类型：
--
作者：
Fristak, Vladimir;Pipiska, Martin;Packova, Alena
本研究的目的是研究两种不同的木质生物炭对水溶液中Cd2+、Zn2+和Cu2+离子的分离利用。物理化学表征证实了吸附剂表面积和阳离子交换能力的主要差异。生物炭（BC） A对镉、锌和铜的最大吸附量分别为1.99、0.97和2.50 mg g(-1)；BC b的吸附量分别为7.80、2.23和3.65 mg g(-1)，吸附过程受时间和ph的影响，镉和锌的吸附主要集中在交换态和铜氧化态。化学改性和FT-IR分析证实了羟基和主要羧基官能团在BC A和BC b对Cd2+、Zn2+和Cu2+离子的吸附过程中起重要作用。
The objective of this study was to study the utilization of two different woody-derived biochars for Cd2+, Zn2+, and Cu2+ ions separation from aqueous solutions. Physicochemical characterization confirmed the main differences in sorbent surface area and cation-exchange capacity. The maximum cadmium, zinc, and copper sorption capacities were 1.99, 0.97, and 2.50 mg g(-1) for biochar (BC) A; 7.80, 2.23, and 3.65 mg g(-1) for BC B. Sorption processes can be affected by time and pH. The most of sorbed cadmium and zinc were bound on exchangeable fractions and copper oxidizable fractions. Chemical modification and FT-IR analyses confirmed the crucial roles of hydroxyl and mainly carboxyl functional groups in sorption processes of Cd2+, Zn2+, and Cu2+ ions by BC A and BC B. The garden wood rests with leaf mass-derived biochar can be utilized as an effective sorbent for bivalent ions.