Hang Guan, Veronica Caggìa, Andrea Gómez-Chamorro, Daniela Fischer, Miquel Coll-Crespí, Xiaowen Liu, Teresa Chávez-Capilla, Klaus Schlaeppi, Alban Ramette, Adrien Mestrot, Moritz Bigalke
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引用次数: 0
Abstract
Abstract Arsenic (As) in soils harms soil organisms and plants, and it can enter the human food chain via the dietary consumption of crops. The mobility, bioavailability and toxicity of As are determined by its concentration and speciation. A greenhouse pot experiment was conducted to study the effects of soil microbial disturbance and maize plants on arsenic concentration and speciation in soil (pore) water and soils. Three soil treatments with varying microbial disturbance were designed for this experiment: native soil, sterilized soil and sterilized soil reconditioned with soil indigenous microbes. The three soil treatments were intersected with three levels of As in soils (0, 100 and 200 mg kg −1 spiked As). Ten pots of each treatment were planted with maize, while three pots were filled with soil without maize. The difference between native and reconditioned soil indicated the abiotic sterilization effect (artifact of the sterilization process), while the difference between sterilized and reconditioned soil showed the microbial disturbance effect. Both effects increased As release into soil water. The microbial disturbance effect was more pronounced for organic As species, showing the influence of soil microbes involved in As methylation. The abiotic sterilization effect was more evident in unplanted pots than planted pots and the microbial disturbance effect was observed only in unplanted pots, suggesting that both effects were mitigated by the presence of maize.
期刊介绍:
It is a multidisciplinary journal focused on global human health consequences of exposure to water pollution in natural and engineered environments. The journal provides a unique platform for scientists in this field to exchange ideas and share information on research for the solution of health effects of exposure to water pollution.
Coverage encompasses Engineering sciences; Biogeochemical sciences; Health sciences; Exposure analysis and Epidemiology; Social sciences and public policy; Mathematical, numerical and statistical methods; Experimental, data collection and data analysis methods and more.
Research topics include local, regional and global water pollution, exposure and health problems; health risk analysis of water pollution, methods of quantification and analysis of risk under uncertainty; aquatic biogeochemical processes in natural and engineered systems and health effects; analysis of pollution, exposure and health data; and more.