Responses of Plants Elevated Levels of Carbon Dioxide

M B Kirkham,D Nie,H He,E T Kanemasu 한국농화학회 1993 Applied Biological Chemistry (Appl Biol Chem) Vol.36 No.5

Particulate plastics as a vector for toxic trace-element uptake by aquatic and terrestrial organisms and human health risk

Bradney, Lauren,Wijesekara, Hasintha,Palansooriya, Kumuduni Niroshika,Obadamudalige, Nadeeka,Bolan, Nanthi S.,Ok, Yong Sik,Rinklebe, Jö,rg,Kim, Ki-Hyun,Kirkham, M.B. Pergamon 2019 Environment international Vol.131 No.-

<P><B>Abstract</B></P> <P>Particulate plastics in the terrestrial and aquatic environments are small plastic fragments or beads (i.e., 5 mm down to the nanometre range). They have been frequently referred to as ‘micro-plastics’ or ‘nano-plastics’. Research has identified particulate plastics as a vector for toxic trace elements in the environment. The adsorption of toxic trace elements by particulate plastics may be facilitated by their high surface area and functionalized surfaces (e.g., through the attachment of natural organic matter). Other factors, such as environmental conditions (e.g., pH and water salinity), surface charge, and trace element oxidation status, also influence the adsorption of trace elements onto particulate plastics. Because of their small size and persistence, particulate plastics and the associated toxic trace elements are readily ingested and accumulated in many terrestrial and aquatic organisms. Thus, these plastics can have severe environmental consequences, such as the development of metal toxicity, within aquatic and terrestrial organisms. Humans could also become exposed to particulate plastics through food chain contamination and airborne ingestion. This review provides an overview of the sources of particulate plastics in the environment. To this end, we describe particulate plastics made of synthetic polymers, their origin, and characteristics with emphasis on how particulate plastics and associated toxic trace elements contaminate terrestrial and aquatic ecosystems. Future research needs and strategies are discussed to help reduce the environmental risks of particulate plastics as a potent vector for the transportation of toxic trace elements.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Particulate plastics include microplastics and nanoplastics. </LI> <LI> The review covers the ecological and human health impacts of particulate plastics. </LI> <LI> Trace-element-sorbed particulate plastics damage aquatic and terrestrial ecosystems. </LI> <LI> Dissolved organic matter facilitates trace element sorption onto particulate plastics. </LI> <LI> Particulate plastics pose human health threats by entering the food chain. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

Responses of Plants to Elevated Levels of Carbon Dioxide

M . B . Kirkham,D . Nie,H . He,E . T . Kanemasu 한국응용생명화학회(구 한국농화학회) 1993 식물생장과 환경 Vol.- No.-

Value-added chemicals from food supply chain wastes: State-of-the-art review and future prospects

Xiong, Xinni,Yu, Iris K.M.,Tsang, Daniel C.W.,Bolan, Nanthi S.,Sik Ok, Yong,Igalavithana, Avanthi D.,Kirkham, M.B.,Kim, Ki-Hyun,Vikrant, Kumar Elsevier 2019 Chemical engineering journal Vol.375 No.-

<P><B>Abstract</B></P> <P>Food wastes are generated massively across global food supply chains. Conventional treatments of food waste (e.g., landfilling and incineration) cause environmental, economic, and social problems. There is a more sustainable and profitable management option by valorization of food waste into value-added chemicals. Consumer chemicals, including acids, sugars, and their derivatized forms, can be synthesized from food waste. Refined specialty chemicals from food waste ranging from solvents to antioxidant materials can be important for nutraceutical and biomaterial applications. Meanwhile, commodity chemicals derived from food waste such as biofuel, biogas, and biochar help meet the global demand for large-scale reutilization of resources and energy. Niche chemicals (e.g., chitosan, glucose, and free amino nitrogen) converted from food waste also show great prospect in nutrient recycling and use for industrial applications. This paper reviews and discusses the latest technological advances in different physical, chemical, and biological treatments of food waste, such that the productivity of value-added chemicals and cost-effectiveness of these valorization methods can be improved for future scaled-up operations. This paper covers holistic comparison and in-depth discussion regarding the feasibility and sustainability of food waste derived chemicals, together with the market outlook of recycling and valorization of food wastes from state-of-the-art perspectives.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Food waste valorization is a profitable and sustainable waste management option. </LI> <LI> Consumer, specialty, commodity, and niche chemicals can be refined or recovered from food waste. </LI> <LI> Physical, chemical, and biological technologies improve outcomes of food waste conversion. </LI> <LI> Integrated biorefinery of food waste into a wide spectrum of value-added products is promising. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

Trace element dynamics of biosolids-derived microbeads

Wijesekara, Hasintha,Bolan, Nanthi S.,Bradney, Lauren,Obadamudalige, Nadeeka,Seshadri, Balaji,Kunhikrishnan, Anitha,Dharmarajan, Rajarathnam,Ok, Yong Sik,Rinklebe, Jö,rg,Kirkham, M.B.,Vithanage, M Elsevier 2018 CHEMOSPHERE - Vol.199 No.-

<P><B>Abstract</B></P> <P>This study focused on quantifying and characterising microbeads in biosolids (i.e., treated sewage sludge), and in examining interactions of microbeads with trace elements when biosolids are added to soil. Under laboratory conditions, batch experiments were conducted to investigate the adsorption of Cu onto pure and surface modified microbeads suspended in soil. The ecotoxicity of microbead-metal complexes to soil microbial activities was also investigated by monitoring basal respiration and dehydrogenase activity. Concentrations of the microbeads were 352, 146, 324, and 174 particles kg<SUP>−1</SUP> biosolids for ≤50, 50–100, 100–250, 250–1000 μm size fractions, respectively. The Scanning Electron Microscope (SEM) images illustrated wrinkled and fractured surfaces due to degradation. The adsorption of dissolved organic matter onto microbeads was confirmed through FT-IR microscopy, while using Inductively Coupled Plasma Mass Spectrometer (ICP-MS) the presence of trace metals including Cd (2.34 ng g<SUP>−1</SUP>), Cu (180.64 ng g<SUP>−1</SUP>), Ni (12.69 ng g<SUP>−1</SUP>), Pb (1.17 ng g<SUP>−1</SUP>), Sb (14.43 ng g<SUP>−1</SUP>), and Zn (178.03 ng g<SUP>−1</SUP>) was revealed. Surface modified microbeads were capable of adsorbing Cu compared to the pure microbeads, which may be attributed to the complexation of Cu with dissolved organic matter associated with the microbeads in the matrix. It was further revealed that the biosolids derived microbead-metal complexes decreased soil respiration (up to ∼ 26%) and dehydrogenase activity (up to ∼ 39%). Hence, microbeads reaching biosolids during wastewater treatment are likely to serve as a vector for trace element contamination, transportation, and toxicity when biosolids are applied to soil.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Biosolids are a major source for microbeads in soil. </LI> <LI> A first-time study on microbial toxicity of biosolids-derived microbeads. </LI> <LI> Microbeads serve as a vector for transportation of trace elements in soil. </LI> <LI> Dissolved organic matter enhanced the adsorption of trace elements by microbeads. </LI> <LI> Microbeads decreased microbial respiration and dehydrogenase activity in soil. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

Water Use Efficiency of Legume and Grain Cover Crops

Oliver Freeman,M.b. Kirkham 한국토양비료학회 2014 한국토양비료학회 학술발표회 초록집 Vol.2014 No.6

Remediation of heavy metal(loid)s contaminated soils - To mobilize or to immobilize?

Bolan, N.,Kunhikrishnan, A.,Thangarajan, R.,Kumpiene, J.,Park, J.,Makino, T.,Kirkham, M.B.,Scheckel, K. Elsevier Scientific Pub. Co 2014 Journal of hazardous materials Vol.266 No.-

Unlike organic contaminants, metal(loid)s do not undergo microbial or chemical degradation and persist for a long time after their introduction. Bioavailability of metal(loid)s plays a vital role in the remediation of contaminated soils. In this review, the remediation of heavy metal(loid) contaminated soils through manipulating their bioavailability using a range of soil amendments will be presented. Mobilizing amendments such as chelating and desorbing agents increase the bioavailability and mobility of metal(loid)s. Immobilizing amendments such of precipitating agents and sorbent materials decrease the bioavailabilty and mobility of metal(loid)s. Mobilizing agents can be used to enhance the removal of heavy metal(loid)s though plant uptake and soil washing. Immobilizing agents can be used to reduce the transfer to metal(loid)s to food chain via plant uptake and leaching to groundwater. One of the major limitations of mobilizing technique is susceptibility to leaching of the mobilized heavy metal(loid)s in the absence of active plant uptake. Similarly, in the case of the immobilization technique the long-term stability of the immobilized heavy metal(loid)s needs to be monitored.

Interaction of arsenic with biochar in soil and water: A critical review

Vithanage, Meththika,Herath, Indika,Joseph, Stephen,Bundschuh, Jochen,Bolan, Nanthi,Ok, Yong Sik,Kirkham, M.B.,Rinklebe, Jö,rg Elsevier 2017 Carbon Vol.113 No.-

<P>Biochar exhibits a great potential to act as a universally applicable material for water and soil remediation due to extensive availability of feedstocks and favorable physio-chemical surface characteristics; nevertheless, studies related to its application on the remediation of toxic metalloids are relatively rare. Hence, this review highlights biochar production technologies, biochar properties, and recent advances in the removal and immobilization of a major metalloid contaminant, As in water and soil. It also covers surface modification of biochars to enhance As removal and microbial properties in biochar amended soil. Experimental studies related to the adsorption behaviors of biochar and the underlying mechanisms proposed to explain them have been comprehensively reviewed. Compared to the number of research publications in SCOPUS database on 'Biochar+Water' (approximate to 1290 - Scopus), the attention drawn to examine the behavior of biochar on the remediation of As is limited (approximate to 85 - Scopus). Because of the toxicity of As, the subject urgently needs more consideration. In addition to covering the topics listed above, this review identifies research gaps in the use of biochar as an adsorbent for As, and proposes potential areas for future application of biochars. (C) 2016 Elsevier Ltd. All rights reserved.</P>

Cadmium Contamination and Its Risk Management in Rice Ecosystems

Bolan, N.S.,Makino, T.,Kunhikrishnan, A.,Kim, P.-J.,Ishikawa, S.,Murakami, M.,Naidu, R.,Kirkham, M.B. ACADEMIC PRESS 2013 Advances in agronomy Vol.119 No.-