Synergistic removal of copper and tetracycline from aqueous solution by steam-activated bamboo-derived biochar.
TL;DR: Steam-activated biochar showed great potential for synergistic removal of antibiotics and heavy metals and bridge enhancement and site competition were involved in the synergistic Removal of TC and Cu2+.
About: This article is published in Journal of Hazardous Materials.The article was published on 2020-02-15. It has received 115 citations till now. The article focuses on the topics: Adsorption.
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TL;DR: In this paper, a review of biochar modification methods for removing emerging contaminants (ECs) from water by modified biochar is presented. And the main research directions and trends, as well as recommendations and suggestions for future development are pointed out.
279 citations
186 citations
TL;DR: The transport and distribution of microplastics/nanoplastics in individual compartments and the toxicity of organisms, either alone or in combination with other pollutants are reviewed.
165 citations
TL;DR: In this paper , the authors summarized the recent research progress on the treatment methods on heavy metal pollutants in water and soils using biochar, including physical modification, chemical modification, biological modification and other categories of biochar.
Abstract: Abstract With social progress and industrial development, heavy metal pollution in water and soils environment is becoming more serious. Although biochar is a low-cost and environmentally friendly adsorbent for heavy metal ions, its adsorption and immobilization efficiency still need to be improved. As an upgraded version of biochar, modified biochar has attracted extensive attention in the scientific community. This review summarized the recent research progress on the treatment methods on heavy metal pollutants in water and soils using biochar. The features and advantages of biochar modification techniques such as physical modification, chemical modification, biological modification and other categories of biochar were discussed. The mechanism of removing heavy metals from soil and water by modified biochar was summarized. It was found that biochar had better performance after modification, which provided higher surface areas and more functional groups, and had enough binding sites to combine heavy metal ions. Biochar is a very promising candidate for removing heavy metals in environment. Furthermore, some high valent metal ions could be reduced to low valent metals, such as Cr(VI) reduction to Cr(III), and form precipitates on biochar by in-situ sorption-reduction-precipitation strategy. However, it is still the direction of efforts to develop high-efficiency modified biochar with low-cost, high sorption capacity, high photocatalytic performance, environmentally friendly and no secondary pollution in future.
123 citations
TL;DR: In this article, the authors discuss the nature and occurrence of tracycline (TC) residues in surface water and present an overview of the various advanced treatment techniques for TC removal.
Abstract: Tetracycline (TC), a frequently used drug for human and veterinary therapeutics, is among the most common antibiotic residues found in nature. Lack of advanced treatment techniques in the wastewater treatment plants (WWTPs) to remove residual TC from domestic and hospital wastewater poses a serious environmental risk. It is important to have an insight into the different advanced treatment techniques for efficient removal of TC from the surface water and in the WWTPs. The aim of this review is to discuss the nature and occurrence of TC in surface water and to present an overview of the various advanced treatment techniques for TC removal. The advanced treatment techniques include advanced oxidation processes (photolysis, ozonation, and catalytic/UV light-based degradation), membrane filtration, reverse osmosis, and adsorption techniques. Adsorption and integrated oxidation treatment techniques are the most widely studied methods, and they are widely accepted because of less cost, reusability, and toxic-free nature. Further, the uses of various types of catalysts for photodegradation and various sorbents for adsorption of TC are also presented. Finally, the importance of green nanocomposite for environmental sustainability in TC removal is emphasized.
100 citations
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TL;DR: This paper has attempted to summarize the latest information available in the literature on the use, sales, exposure pathways, environmental occurrence, fate and effects of veterinary antibiotics in animal agriculture.
2,856 citations
TL;DR: Modification of biochar derived from sawdust shows great potential for simultaneous removal of Cu(II) and tetracycline from co-contaminated water.
501 citations
TL;DR: In this paper, a metal-free carbon doping-carbon nitride (BCM-C 3 N 4 ) nanocomposite was synthesized by introducing barbituric acid and cyanuric acids during the polymerization of melamine.
Abstract: Many organic and inorganic compounds have been developed as visible light driven photocatalysts for environment and energy application. In this work, a metal-free carbon doping–carbon nitride (BCM-C 3 N 4 ) nanocomposite was synthesized by introducing barbituric acid and cyanuric acid during the polymerization of melamine. The BCM-C 3 N 4 was characterized by structure, porosity, optical performance, and photoelectrochemical properties. Results demonstrated that BCM-C 3 N 4 sample exhibited higher surface area, lower fluorescence intensity, better photocurrent signals and more efficient charge transfer in comparison to pure C 3 N 4 . The BCM-C 3 N 4 exhibits excellent photocatalytic degradation ability of sulfamethazine (SMZ) under visible light irradiation. Much superior photocatalytic activity and high pollutant mineralization rate was achieved by BCM-C 3 N 4 , where it was 5 times than that of pristine C 3 N 4 . The effect of initial SMZ concentrations on photocatalyst was also investigated. Additionally, the trapping experiments and electron spin resonance tests demonstrated that the main active species, such as O 2 − and h + , could be produced under light irradiation. This work might provide an effective approach to the design of low-cost and highly efficient photocatalysis degradation systems for water treatment.
458 citations
TL;DR: In this work, a novel approach was developed to prepare an engineered biochar from KMnO4 treated hickory wood through slow pyrolysis (600°C) that had strong sorption ability and the removal of the heavy metals by the biochars was mainly through surface adsorption mechanisms involving both the surface MnOx particles and oxygen-containing groups.
413 citations
TL;DR: The enhanced surface area of the MPC, as well as its graphite-like structure, may contribute to the adsorption capacity of TC, which could be effectively separated by applying a magnetic field.
326 citations