Faculty of Industrial Chemistry and Environmental, Politehnica University of Timisoara, 300006 Timisoara, Romania.
Westfälische Hochschule, University of Applied Sciences, 45897 Gelsenkirchen, Germany.
Molecules. 2020 May 31;25(11):2559. doi: 10.3390/molecules25112559.
Incineration of sewage sludge produces every year huge amounts of sewage sludge ash. Due to its porosity and composition, sewage sludge ash can be used as an adsorbent for heavy metal ions removal. The present paper discusses the efficiency and feasibility of its use as an adsorbent for Pb (II) and Cu (II) removal in single and binary systems. Sewage sludge ash dosage, pH influence, equilibrium and kinetic studies were examined. The results show that sewage sludge ash is an effective and environmentally friendly adsorbent. The maximum adsorption capacity was 25.0 mg/g for Pb (II) and 7.5 mg/g for Cu (II). The presence of the competitive metal led to lower adsorption rate. The study concludes that sewage sludge ash is a promising adsorbent for Pb (II) and Cu (II) removal from wastewater presenting both economic and environmental benefits.
焚烧污水污泥每年会产生大量的污水污泥灰。由于其多孔性和组成，污水污泥灰可用作重金属离子去除的吸附剂。本文讨论了其作为吸附剂在单一和二元体系中去除 Pb(II)和 Cu(II)的效率和可行性。研究了污水污泥灰用量、pH 值影响、平衡和动力学等方面。结果表明，污水污泥灰是一种有效且环保的吸附剂。对于 Pb(II)，最大吸附容量为 25.0mg/g，对于 Cu(II)，最大吸附容量为 7.5mg/g。竞争金属的存在导致吸附速率降低。研究表明，污水污泥灰是一种很有前途的吸附剂，可从废水中去除 Pb(II)和 Cu(II)，具有经济和环境效益。
