Investigating the removal of some pharmaceutical compounds in hospital wastewater treatment plants operating in Saudi Arabia

The concentrations of 12 pharmaceutical compounds (atenolol, erythromycin, cyclophosphamide, paracetamol, bezafibrate, carbamazepine, ciprofloxacin, caffeine, clarithromycin, lidocaine, sulfamethoxazole and Nacetylsulfamethoxazol (NACS)) were investigated in the influents and effluents of two hospital wastewater treatment plants (HWWTPs) in Saudi Arabia. The majority of the target analytes were detected in the influent samples apart from bezafibrate, cyclophosphamide, and erythromycin. Caffeine and paracetamol were detected in the influent at particularly high concentrations up to 75 and 12 ug/L, respectively. High removal efficiencies of the pharmaceutical compounds were observed in both HWWTPs, with greater than 90 % removal on average. Paracetamol, sulfamethoxazole, NACS, ciprofloxacin, and caffeine were eliminated by between >95 and >99 % on average. Atenolol, carbamazepine, and clarithromycin were eliminated by >86 % on average. Of particular interest were the high removal efficiencies of carbamazepine and antibiotics that were achieved by the HWWTPs; these compounds have been reported to be relatively recalcitrant to biological treatment and are generally only partially removed. Elevated temperatures and high levels of sunlight were considered to be the main factors that enhanced the removal of these compounds

Sustainable deployment of environmental management systems for higher education institutions:challenges and limitations

Higher education institutions (HEIs) face unique barriers to implementation of environmental management systems (EMSs) compared to the private sector, where formal EMS approaches such as ISO 14001 are widely used. HEIs across the world have tended to adopt structured EMSs through less formal methods or apply bespoke approaches based on institutional drivers for implementation. This chapter explores organizational factors specific to HEIs that impact on their ability to implement and sustain formal EMS approaches. An in-depth review was undertaken examining key organization barriers to EMS adoption, and organizational factors specific to HEIs that can affect the successful implementation and sustainability of EMS approaches. The study finds that considerations of the key actors, existing organizational structures, governance and leadership, and resistance to change are important areas to consider in the implementation of an EMS within an HEI. UK HEIs are used as a case study to examine the relationship between EMS uptake and performance, and identify trends toward the adoption of various types of systems. We find that a trend toward the adoption of more formalized EMS approaches among UK HEIs contradicts the suggestion from the literature that less-formal approaches may be more suitable. The study challenges the assumption that formal approaches to environmental management such as ISO 14001 and Eco-Management and Audit Scheme (EMAS) provide the gold standard EMS, suggesting that alternative standards may be more suitable in the context of the unique organizational structures and key barriers to EMS implementation faced by HEIs