Han Zhang, Xiaodong Wu, Qiao Zhang, Gang Xue, Xinhui Duan, Jinsheng Liang, Cairong Gong
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引用次数: 0
Abstract
In recent years, soil heavy metal pollution and the accumulation of tailings and food waste cannot be ignored. Currently, soil remediation agents are expensive or have poor remediation effects. In this experiment, alkali-modified tailings biochar composite (MTB) was prepared by low-temperature pyrolysis using tailings and food waste as raw materials for the remediation of soil heavy metal Cd. MTB has a large number of oxygen-containing functional groups on its surface (Si–O, Fe–O, -OH, C-O, -COOH), which is favorable for the adsorption of the heavy metal Cd. The adsorption behavior is consistent with the Langmuir model and the proposed second-order kinetic equation, and the adsorption mechanism is mainly complexation and precipitation. 650 °C pyrolysis preparation of MTB3 reduced bioavailable cadmium by 83% in 35 days, and the active Cd was transformed into inactive Cd. Potting experiments showed that ryegrass biomass significantly increased.Adding 8% MTB3 to ryegrass significantly reduced Cd accumulation, lowering available cadmium by 86.4% in 35 days compared to the control (CK). Tailings biochar improved soil properties, boosting plant germination and height by 26.94% to 106%. The study showed that tailings biochar composites have good prospects for remediation of soil heavy metal Cd pollution.
期刊介绍：
Water, Air, & Soil Pollution is an international, interdisciplinary journal on all aspects of pollution and solutions to pollution in the biosphere. This includes chemical, physical and biological processes affecting flora, fauna, water, air and soil in relation to environmental pollution. Because of its scope, the subject areas are diverse and include all aspects of pollution sources, transport, deposition, accumulation, acid precipitation, atmospheric pollution, metals, aquatic pollution including marine pollution and ground water, waste water, pesticides, soil pollution, sewage, sediment pollution, forestry pollution, effects of pollutants on humans, vegetation, fish, aquatic species, micro-organisms, and animals, environmental and molecular toxicology applied to pollution research, biosensors, global and climate change, ecological implications of pollution and pollution models. Water, Air, & Soil Pollution also publishes manuscripts on novel methods used in the study of environmental pollutants, environmental toxicology, environmental biology, novel environmental engineering related to pollution, biodiversity as influenced by pollution, novel environmental biotechnology as applied to pollution (e.g. bioremediation), environmental modelling and biorestoration of polluted environments.
Articles should not be submitted that are of local interest only and do not advance international knowledge in environmental pollution and solutions to pollution. Articles that simply replicate known knowledge or techniques while researching a local pollution problem will normally be rejected without review. Submitted articles must have up-to-date references, employ the correct experimental replication and statistical analysis, where needed and contain a significant contribution to new knowledge. The publishing and editorial team sincerely appreciate your cooperation.
Water, Air, & Soil Pollution publishes research papers; review articles; mini-reviews; and book reviews.
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