NUS Environmental Research Institute, 1 Create Way, National University of Singapore, 138602, Singapore.
School of Chemical Engineering, East China University of Science and Technology, No. 130, Meilong Road, Shanghai, 200237, China.
Chemosphere. 2021 May;271:129542. doi: 10.1016/j.chemosphere.2021.129542. Epub 2021 Jan 3.
The occurrence of emerging organic contaminants (EOCs) such as chemicals in personal care products, pharmaceuticals, plasticizers, etc. in surface waters is a growing global concern. The discharge of most EOCs is not regulated, and EOCs have been shown to be toxic to both human and aquatic life even at low concentrations. In this work, acid-leached carbon black waste (LCBW), a carbonaceous residue from petroleum refineries, was investigated as a potential waste-derived adsorbent for the removal of EOCs. Ciprofloxacin hydrochloride, (CIPRO, antibiotic), sulfamethoxazole (SULFA, antibiotic), acetaminophen (ACET, pharmaceutical), bisphenol A (BPA, plasticizer) and N,N-diethyl-3-methylbenzamide (DEET, insect repellent) were chosen as the target EOCs owing to their presence in relatively high concentrations in surface waters as well as in the influent and effluent of wastewater treatment plants. LCBW, with a specific surface area of 409 m/g, demonstrated 90-99% removal of 10 ppm CIPRO, BPA, and ACET and 70-80% removal of 10 ppm SULFA and DEET in tap water. Adsorption was rapid, particularly for CIPRO, BPA, and ACET, wherein >85% of the adsorption occurred within 1 h of contact time. To illustrate the potential of LCBW as an adsorbent in different physical forms, ∼3 mm spherical beads of LCBW encapsulated within carboxymethyl cellulose matrix were prepared by a facile ionic gelation method and their adsorption performance was demonstrated.
新兴有机污染物（EOCs）如个人护理产品、药品、增塑剂等化学物质在地表水中的出现是一个日益引起全球关注的问题。大多数 EOCs 的排放不受监管，并且即使在低浓度下，EOCs 已被证明对人类和水生生物都具有毒性。在这项工作中，酸浸炭黑废料（LCBW），一种来自炼油厂的含碳残渣，被研究作为一种潜在的废物衍生吸附剂，用于去除 EOCs。盐酸环丙沙星（CIPRO，抗生素）、磺胺甲恶唑（SULFA，抗生素）、对乙酰氨基酚（ACET，药物）、双酚 A（BPA，增塑剂）和 N，N-二乙基-3-甲基苯甲酰胺（DEET，驱虫剂）被选为目标 EOCs，因为它们在地表水中以及在污水处理厂的进水和出水中有相对较高的浓度存在。LCBW 的比表面积为 409 m/g，在自来水中对 10 ppm 的 CIPRO、BPA 和 ACET 的去除率达到 90-99%，对 10 ppm 的 SULFA 和 DEET 的去除率达到 70-80%。吸附速度很快，特别是对于 CIPRO、BPA 和 ACET，在接触时间 1 小时内，超过 85%的吸附发生了。为了说明 LCBW 作为不同物理形式的吸附剂的潜力，通过简单的离子凝胶化方法制备了包裹在羧甲基纤维素基质中的 LCBW 约 3 毫米球形珠，并展示了它们的吸附性能。
