Shiyao Bu, Xia Xu, Jun Guo, Xiaozan Su, Shenjie Zhang, Chao Jiang, Yongqiang Yang, Tengya Ni
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引用次数: 0
摘要
钛混凝剂从实验领域过渡到实用领域的主要障碍是其高昂的应用成本。为应对这一挑战，本研究引入了一种创新的回收工艺，通过酸化水处理污泥来生产再生 Ti 混凝剂，从而优化污泥利用率。通过模拟去除废水中的浊度，对再生混凝剂的效率进行了评估。结果表明，在 H2SO4 浓度较高的情况下，三种 Ti 混凝剂都能有效去除浊度。在基线浊度为 15 ± 0.5 NTU 的浊度实验中，当混凝剂浓度为 5 mg Ti/L、H2SO4 浓度为 10 ml/L 时，浊度去除率发生了显著变化。随着混凝剂用量的增加，拐点趋向于向更高水平移动。此外，还使用两种不同类型的实际水对酸化工艺的多功能性进行了评估。实际水中的污染物得到了明显改善。在用于去除湖水浊度的三种 Ti 再生混凝剂中，剩余浊度始终低于 5 NTU。钛 xerogel 混凝剂（TXC(As)）的酸化上清液浊度值仅为 1.99 ± 0.1 NTU。此外，对生活废水浊度的去除率为 80%。值得注意的是，这些结果表明，与商用混凝剂相比，TXC（As）在降低有机物和磷含量方面表现出色，从而展示了其卓越的净化能力。这项研究为 Ti 水处理污泥的可持续再利用提供了一种可行的方法。
Regeneration of Ti Coagulants from Water Treatment Sludge Using acid Leaching: Efficiency in Turbidity and Pollutant Removal
The primary obstacle in transitioning Ti coagulants from the experimental to the practical realm is their exorbitant application costs. To address this challenge, this research introduced an innovative recovery process through acidification of water treatment sludge to produce regenerated Ti coagulants, optimizing sludge utilization. The efficiency of the regenerated coagulants was evaluated by simulating turbidity removal from wastewater. The results showed that the three Ti coagulants exhibited effective turbidity removal at elevated H2SO4 concentrations. In a turbidity experiment with baseline turbidity of 15 ± 0.5 NTU, a notable change in turbidity removal was observed at a coagulant concentration of 5 mg Ti/L and H2SO4 concentration of 10 ml/L. As the coagulant dosage increased, the inflection point tended to move to a higher level. Furthermore, the versatility of the acidification process was evaluated using two distinct types of actual water. The pollutants in the actual water showed significant improvement. Among the three kinds of Ti regenerated coagulants used to remove turbidity from lake water, the remaining turbidity was consistently less than 5 NTU. The acidized supernatants of titanium xerogel coagulant (TXC(As)) exhibited a turbidity value of only 1.99 ± 0.1 NTU. Additionally, the removal of turbidity from domestic wastewater was 80%. Notably, these results showed superior performance in reducing organic matter and phosphorus levels, thereby showcasing their exceptional purification capabilities compared to commercial coagulants. This research presents a viable methodology for the sustainable reuse of Ti water treatment sludge.
期刊介绍：
Water, Air, & Soil Pollution is an international, interdisciplinary journal on all aspects of pollution and solutions to pollution in the biosphere. This includes chemical, physical and biological processes affecting flora, fauna, water, air and soil in relation to environmental pollution. Because of its scope, the subject areas are diverse and include all aspects of pollution sources, transport, deposition, accumulation, acid precipitation, atmospheric pollution, metals, aquatic pollution including marine pollution and ground water, waste water, pesticides, soil pollution, sewage, sediment pollution, forestry pollution, effects of pollutants on humans, vegetation, fish, aquatic species, micro-organisms, and animals, environmental and molecular toxicology applied to pollution research, biosensors, global and climate change, ecological implications of pollution and pollution models. Water, Air, & Soil Pollution also publishes manuscripts on novel methods used in the study of environmental pollutants, environmental toxicology, environmental biology, novel environmental engineering related to pollution, biodiversity as influenced by pollution, novel environmental biotechnology as applied to pollution (e.g. bioremediation), environmental modelling and biorestoration of polluted environments.
Articles should not be submitted that are of local interest only and do not advance international knowledge in environmental pollution and solutions to pollution. Articles that simply replicate known knowledge or techniques while researching a local pollution problem will normally be rejected without review. Submitted articles must have up-to-date references, employ the correct experimental replication and statistical analysis, where needed and contain a significant contribution to new knowledge. The publishing and editorial team sincerely appreciate your cooperation.
Water, Air, & Soil Pollution publishes research papers; review articles; mini-reviews; and book reviews.
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