Explore the vast range of titles available.

This study provides the first set of quantitative data on the occurrence and fate of a wide range of contaminants of emerging concerns (CECs) in Indonesia’s largest wastewater treatment plant (WWTP). The WWTP employs waste stabilization ponds (WSPs) as the secondary treatment before discharging the effluent to the Citarum River. Fourteen out of twenty-two monitored CECs were detected in the wastewater influent, and seven were present in the effluent, with a total concentration of 29.8 ± 0.4 µg/L and 0.5 ± 0.0 µg/L, respectively. The occurrence of the CECs in this study was found to be well correlated with their possible use and known detection in surface waters in Indonesia. Caffeine (CAF) at 12.2 ± 0.1 µg/L, acetaminophen (ACT) at 9.1 ± 0.1 µg/L, N , N -diethyl- m -toluamide (DEET) at 5.0 ± 0.1 µg/L, ibuprofen (IBU) at 2.3 ± 0.0 µg/L, and triclosan (TCS) at 470 ± 64 ng/L were discovered as the five most prevalent CECs, followed by bisphenol A (BPA), trimethoprim (TMP), Tris(2-chloroethyl) phosphate (TCEP), sulfamethazine (SMZ), carbamazepine (CBZ), fluoxetine (FLX), benzotriazole (BTA), sulfamethoxazole (SMX), and metformin (METF). Biodegradable CECs (SMX, SMZ, ACT, IBU, TCS, BPA, CAF, DEET, and TMP) were efficiently removed (83–100%) by the WSP. In contrast, recalcitrant CECs achieved poor removal efficiencies (e.g., FLX at 24%), and for others, treatment processes even resulted in elevated concentrations in the effluent (CBZ by 85%, TCEP by 149%, and BTA by 92%). The CECs’ influent concentrations were determined to pose a moderate aquatic cumulative risk, while no such risk was associated with their effluent concentrations. The study demonstrates the importance of conventional WWTPs in reducing the concentrations of CECs to minimize their aquatic contamination risk. The findings are relevant for countries, such as Indonesia, with limited resources for advanced centralized wastewater treatments, and which are exploring the efficacy of centralized WSP against the existing decentralized treatments.

Hexazinone, a globally applied broad-spectrum triazine herbicide, has not been mechanistically investigated previously under advanced oxidation processes (AOPs) and adsorption on activated carbon. In this study, its fate during UV-based oxidation with/without hydrogen peroxide (H 2 O 2 ) and adsorption on coconut shell–based granular activated carbon (CSGAC) in water matrices was investigated. A comparison between various irradiation sources (visible, UVA, UVB, and UVC) revealed the highest degradation rate under UVC. More than 98% degradation of hexazinone was observed under 3 J cm −2 UVC fluence in the presence of 0.5 mM H 2 O 2 at pH 7. Moreover, the degradation rate enhanced significantly with an increase in the initial dosage of H 2 O 2 , UV fluence, and contact time in the UV/H 2 O 2 process. The rate of degradation was lower using secondary effluent than that of Milli-Q water due to the presence of dissolved organics in wastewater. However, the reactions in both matrices obeyed pseudo-first-order kinetics. The effect of different scavengers, including methanol, potassium iodide (KI), and tert-butyl alcohol (TBA), showed that hydroxyl radicals ( • OH) played a dominant role in hexazinone degradation in the UV/H 2 O 2 process. Hexazinone was effectively adsorbed by CSGAC through π-π electron donor–acceptor interactions between hexazinone’s triazine ring and CSGAC’s surface functional groups. The isotherm and kinetic studies showed that the adsorption followed the Freundlich model and pseudo-second-order reaction, respectively, suggesting chemisorption. This study provided mechanistic insights on the removal of hexazinone at the tertiary stage of wastewater treatment or the advanced treatment of wastewater reuse.

This annual review covers the literature published in 2018 on topics related to the occurrence and fate of environmental pollutants in wastewater. Due to the vast amount of literature published on this topic, we have discussed only a portion of the quality research publications, due to the limitation of space. The abstract search was carried out using Web of Science, and the abstracts were selected based on their relevance. In a few cases, full-text articles were referred to understand new findings better. This review is divided into the following sections: antibiotic-resistant bacteria (ARBs) and antibiotic-resistant genes (ARGs), disinfection by-products (DBPs), drugs of abuse (DoAs), estrogens, heavy metals, microplastics, per- and polyfluoroalkyl compounds (PFAS), pesticides, and pharmaceuticals and personal care products (PPCPs), with the addition of two new classes of pollutants to previous years (DoAs and PFAS).

Since dolochar is a sponge iron industry waste with limited reuse options, it is important to develop useful applications for this waste stream. Here, the adsorption efficiency of dolochar for copper (Cu) was evaluated under a varying parameters including adsorbent dose, contact time, initial concentration, pH, stirring rate and temperature, via batch analysis. Complete Cu removal (100%) with a maximum uptake capacity of 30 mg g−1 was observed under optimised conditions of 60 mg L−1 initial concentration, pH 5, 15 min contact time, 2 g L−1 adsorbent dose and 120-rpm agitation. The adsorption of Cu by dolochar best fitted the Langmuir adsorption model indicating monolayer adsorption of Cu. Kinetics data obeyed a pseudo-second-order reaction with a moderate fit to the intraparticle diffusion model. Thermodynamic studies indicated that the adsorption of Cu by dolochar was an exothermic and spontaneous reaction. The feasibility of using dolochar for Cu-contaminated wastewater remediation was also assessed by treating a Cu industry wastewater sample with dolochar. Cu removal efficiency of 99.4% was observed from wastewater under optimised conditions, highlighting a new useful application for the use of dolochar.

This annual review covers the literature published in 2015 on topics related to the occurrence and fate of emerging environmental pollutants in wastewater. Due to the vast amount of literature published on this topic, I have discussed only a fraction of the quality research publications, up to maximum 20 relevant articles per section, due to limitation of space. The abstract search was carried out using Web of Science, and the abstracts were selected based on their relevance. In few cases, full-text articles were referred to better understand new findings. This review is divided into the following sections: biological agents, disinfection by-products (DBPs), halogenated compounds, pharmaceuticals and personal care products (PPCPs), and other emerging contaminants.

This annual review covers the literature published in 2017 on topics related to the occurrence and fate of emerging environmental pollutants in wastewater. Due to the vast amount of literature published on this topic, we have discussed only a portion of the quality research publications, due to the limitation of space. The abstract search was carried out using Web of Science, and the abstracts were selected based on their relevance. In few cases, full-text articles were referred to better understand new findings. This review is divided into the following sections: antibiotic-resistant bacteria (ARBs) and antibiotic-resistant genes (ARGs), disinfection by-products (DBPs), estrogens, pesticides, pharmaceuticals and personal care products (PPCPs), and microplastics, a new section added this year.

This annual review covers the literature published in 2014 on topics related to the occurrence and fate of emerging environmental pollutants in wastewater. Due to the vast amount of literature published on this topic, I have discussed only a fraction of the quality research publications, up to maximum 15 relevant articles per section, due to limitation of space. The abstract search was carried out using Web of Science, and the abstracts were selected based on their relevance. In few cases, full-text articles were referred to better understand new findings. This review is divided into the following sections: biological agents, disinfection by-products (DBPs), halogenated compounds, pharmaceuticals and personal care products (PPCPs), and other emerging contaminants.

This annual review covers the literature published in 2016 on topics related to the occurrence and fate of emerging environmental pollutants in wastewater. Due to the vast amount of literature published on this topic, we have discussed only a portion of the quality research publications. The abstract search was carried out using Web of Science, and the abstracts were selected based on their relevance. In few cases, full-text articles were referred to better understand new findings. This review is divided into the following sections: Antibiotic resistant bacteria (ARBs) and antibiotic resistant genes (ARGs), disinfection by-products (DBPs), estrogens, nanomaterials, pathogens, perfluorinated chemicals (PFCs), pharmaceuticals and personal care products (PPCPs), and other pollutants.

A review of the literature published in 2013 on topics relating to the fate of emerging environmental pollutants during wastewater treatment is presented. This review is divided into the following sections: emerging biological agents, estrogens, metals, nanomaterials, nutrients, persistent organic pollutants, pharmaceuticals and personal care products and herbicide, and trace organic contaminants.