College of Environmental Science and Engineering, Hunan University, Changsha, 410082, PR China.
State Key Laboratory of Utilization of Woody Oil Resource, Hunan Academy of Forestry, Changsha, 410004, PR China.
Chemosphere. 2022 Jan;287(Pt 1):131966. doi: 10.1016/j.chemosphere.2021.131966. Epub 2021 Aug 20.
In this work, a novel sludge biochar/Zn-Al layered double hydroxide composite (SL) was synthesized in a facile co-precipitation method, and it was used to simultaneously remove benzotriazole (BTA) and lead ion (Pb(II)). Batch adsorption experiments demonstrated that composites with sludge content of 1.0 g (SL-1.0) had a great adsorption performance for BTA and Pb(II). The maximum adsorption capacities of SL-1.0 for BTA and Pb(II) were 239.6 and 226.1 mg g, respectively. There was preferential adsorption of BTA in BTA and Pb(II) binary system. The adsorption mechanism analysis indicated that the BTA and Pb(II) adsorption involved electrostatic attraction and chemical bonding with surface functional groups on SL-1.0. Specifically, hydrogen bonding and π-π interaction were mainly ascribed to BTA adsorption, while complexation with surface function groups dominated Pb(II) adsorption. With the advantages of facile synthesis and excellent adsorption capacity, SL-1.0 possesses great potential for simultaneously removing of BTA and Pb(II) from wastewaters.
在这项工作中，我们采用简便的共沉淀法合成了一种新型污泥生物炭/Zn-Al 层状双氢氧化物复合材料（SL），并将其用于同时去除苯并三唑（BTA）和铅离子（Pb(II)）。批处理吸附实验表明，污泥含量为 1.0 g 的复合材料（SL-1.0）对 BTA 和 Pb(II)具有很强的吸附性能。SL-1.0 对 BTA 和 Pb(II)的最大吸附容量分别为 239.6 和 226.1 mg/g。在 BTA 和 Pb(II)二元体系中存在对 BTA 的优先吸附。吸附机理分析表明，BTA 和 Pb(II)的吸附涉及到 SL-1.0 表面官能团的静电吸引和化学结合。具体来说，氢键和π-π相互作用主要归因于 BTA 的吸附，而表面官能团的配位作用则主导了 Pb(II)的吸附。SL-1.0 具有合成简便、吸附容量大的优点，有望用于同时去除废水中的 BTA 和 Pb(II)。
