Hazardous waste treatment technologies

Abstract

This is a review of the literature published in 2018 on topics related to hazardous waste management in water, soils, sediments, and air. The review covers treatment technologies applying physical, chemical, and biological principles for contaminated water, soils, sediments, and air.Practitioner points The management of waters, wastewaters, and soils contaminated by various hazardous chemicals including inorganic (e.g., oxyanions, salts, and heavy metals), organic (e.g., halogenated, pharmaceuticals and personal care products, pesticides, and persistent organic chemicals) was reviewed according to the technology applied, namely, physical, chemical and biological methods. Physical methods for the management of hazardous wastes including adsorption, coagulation (conventional and electrochemical), sand filtration, electrosorption (or CDI), electrodialysis, electrokinetics, membrane (RO, NF, MF), photocatalysis, photoelectrochemical oxidation, sonochemical, non‐thermal plasma, supercritical fluid, electrochemical oxidation, and electrochemical reduction processes were reviewed. Chemical methods including ozone‐based, hydrogen peroxide‐based, persulfate‐based, Fenton and Fenton‐like, and potassium permanganate processes for the management of hazardous were reviewed. Biological methods such as aerobic, anaerobic, bioreactor, constructed wetlands, soil bioremediation and biofilter processes for the management of hazardous wastes, in mode of consortium and pure culture were reviewed.

Identification of source information for sudden hazardous chemical leakage accidents in surface water on the basis of particle swarm optimisation, differential evolution and Metropolis–Hastings sampling

“…For example, in July 2010, an SHCLA was caused by chemical leakage in the Songhuajiang River, Jilin Province; in June 2011, a phenol leakage accident occurred in Xinanjiang, Zhejiang Province; in January 2012, a cadmium leakage accident occurred in the Longjiang River, Guangxi Province; in January 2013, an aniline leakage accident happened in the ZhuoZhang River, Shanxi Province; in May 2014, a waste lye leakage accident occurred in Jingjiang, Jiangsu Province; in November 2015, water pollution in the Jialing River was caused by tailing leakage in Longnan City, Gansu Province (Wang et al, 2015); in March 2016, a chemical leakage to irrigation sources in Chizhou, Anhui Province and a diesel oil leakage accident in Hanzhong, Shanxi Province occurred; in May 2017, a thallium leakage accident occurred in the Jialing River, Sichuan Province; in August 2018, a waste lye leakage accident happened in Nanyang City, Henan Province; in May 2019, water pollution outbreak occurred in the Beiluo River, Shanxi Province. These accidents have a series of uncertainties, such as leakage time, leakage position, leakage intensity, damage degree and influence range, which usually damage the water ecological environment and threaten human health, even affecting social stability (Yu et al, 2015;Andrle and Badia, 2015;Wang et al, 2019;Lei et al, 2019). Many hazardous chemicals, such as organic matter, heavy metals and bacteria, are difficult to detect with the naked eye before causing harm (Wu et al, 2020).…”

Identification of source information for sudden hazardous chemical leakage accidents in surface water on the basis of particle swarm optimisation, differential evolution and Metropolis–Hastings sampling

“…With the implementation of the 'One Belt, One Road' strategy and the acceleration of urban construction, the production, storage, transportation and utilisation of hazardous chemicals in China have also increased (Zhao et al, 2018;Sun et al, 2019). However, the production, storage, transportation and utilisation of hazardous chemicals easily trigger the sudden hazardous chemical leakage accidents (SHCLAs) in surface water (Zhang et al, 2018;Yoo and Choi, 2019) influence range, which usually damage the water ecological environment and threaten human health, even affecting social stability (Yu et al, 2015;Andrle and Badia, 2015;Wang et al, 2019;Lei et al, 2019). Many hazardous chemicals, such as organic matter, heavy metals and bacteria, are difficult to detect with the naked eye before causing harm (Wu et al, 2020).…”

Microwave-Assisted Synthesis of Chalcopyrite/Silver Phosphate Composites with Enhanced Degradation of Rhodamine B under Photo-Fenton Process

“…Furthermore, dyes can absorb sunlight and reduce water clarity, preventing photosynthesis in aquatic plants, decreasing dissolved oxygen in water, affecting microbial diversity, and disrupting the self-purification capacity of water [7]. The removal of these deleterious and hazardous pollutants from industrial wastewater has become an urgent environmental need in the world [8].…”

“…However, the reusability of CuFeS 2 is a challenge due to its dissolution during water treatment and the slow kinetics of Fe 2+ regeneration: To address CuFeS 2 reusability, attempts have been made to regenerate the Fenton catalysts with UV and/or visible-light irradiation, known as the photo-Fenton process [19,24,25]. Under UV and/or visible-light irradiation, Fe 3+ complexes are formed from the Fenton reaction (Equation (7)) to produce both Fe 2+ and hydroxyl radicals (Equation (8)). The photogenerated Fe 2+ ions can catalyze the Fenton reaction to form Fe 3+ , thus demonstrating the recyclability of Fenton catalysts (Equation (4)).…”