纳米羟基磷灰石改性生物炭对水中泰乐菌素、磺胺甲恶唑和 Cu(II)的竞争吸附。
Competitive adsorption of tylosin, sulfamethoxazole and Cu(II) on nano-hydroxyapatitemodified biochar in water.
机构信息
School of Environment, Tsinghua University, Beijing, 100084, China.
School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing, 100083, China.
出版信息
Chemosphere. 2020 Feb;240:124884. doi: 10.1016/j.chemosphere.2019.124884. Epub 2019 Sep 16.
Antibiotics and heavy metals are frequently detected simultaneously in water environment. In this study, the competitive adsorption behavior of tylosin (TYL) and sulfamethoxazole (SMX) on nano-hydroxyapatite modified biochar (nHAP@biochar) in accordance with Cu(II) in single, binary and ternary systems was investigated. The specific surface area of nHAP@biochar was 566.056 m/g. The adsorption of TYL on nHAP@biochar reduced by 13.36%-41.04% or 9.92%-38.69% with Cu(II) and SMX in the solution, respectively. The suppression of SMX was stronger than Cu(II) on the adsorption of TYL when the SMX or Cu(II) was constant. The adsorption of SMX increased by 2.01-3.56 times in the present of Cu(II), while suppressed by TYL up to 42.30%. Due to the bridging of TYL or SMX between the nHAP@biochar and Cu(II) and destroying of bound water surrounded, the adsorption of Cu(II) increased to a greater extent. Electrostatic interaction and H-bond were the two main interactions between TYL, SMX and Cu(II) and nHAP@biochar. π-π interactions was also interaction between the SMX and nHAP@biochar.
抗生素和重金属经常同时在水环境中被检测到。在这项研究中，研究了在单一组分、二元和三元体系中，泰乐菌素（TYL）和磺胺甲恶唑（SMX）与铜（II）在纳米羟基磷灰石修饰生物炭（nHAP@biochar）上的竞争吸附行为。nHAP@biochar 的比表面积为 566.056 m/g。当溶液中存在 Cu(II)和 SMX 时，TYL 在 nHAP@biochar 上的吸附分别减少了 13.36%-41.04%或 9.92%-38.69%。当 SMX 或 Cu(II)保持不变时，SMX 对 TYL 吸附的抑制作用强于 Cu(II)。在 Cu(II)存在的情况下，SMX 的吸附增加了 2.01-3.56 倍，而 TYL 则抑制了 42.30%。由于 TYL 或 SMX 在 nHAP@biochar 和 Cu(II)之间的桥接作用以及包围的结合水的破坏，Cu(II)的吸附增加到更大的程度。静电相互作用和氢键是 TYL、SMX 和 Cu(II)与 nHAP@biochar 之间的两种主要相互作用。SMX 和 nHAP@biochar 之间也存在π-π相互作用。
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