Biochar of agricultural and forestry waste is one of the core ways to solve the greenhouse effect, and it is also the key measure to improve the land productivity of China’s low yield fields and realize the sustainab...Biochar of agricultural and forestry waste is one of the core ways to solve the greenhouse effect, and it is also the key measure to improve the land productivity of China’s low yield fields and realize the sustainable development of agriculture. Due to the large area of China’s albic soil, the long-term drought and flood disasters make it a typical low-yield field, which has not been effectively treated. Biochar provides new hope for improving low-yield albic soil. This paper introduces the basic properties of biochar, the albic soil formation mechanism, the low yield of albic soil factors and the improving theoretical basis of biochar. The paper introduces the technical features of the albic soil improvement and the advantages of the albic soil improvement by biochar. In the view of ascending low production potential, solving the greenhouse effect, achieving agricultural sustainable development, the application value and development prospects of albic soil improved by biochar are discussed.展开更多
It is urgent to explore an effective removal method for perfluorooctanoic acid(PFOA)due to its recalcitrant nature.In this study,a novel chitosan-based hydrogel(CEGH)was prepared with a simple method using chitosan an...It is urgent to explore an effective removal method for perfluorooctanoic acid(PFOA)due to its recalcitrant nature.In this study,a novel chitosan-based hydrogel(CEGH)was prepared with a simple method using chitosan and ethylene glycol through a repeated freezingthawing procedure.The adsorption of PFOA anions to CEGH agreed well to the FreundlichLangmuir model with a maximum adsorption capacity as high as 1275.9 mg/g,which is higher than reported values of most adsorbents for PFOA.The adsorption was influenced by experimental conditions.Experimental results showed that the main removal mechanism was the ionic hydrogen bond interaction between carbonyl groups(COO-)of PFOA and protonated amine(NH^+)of the CEGH adsorbent.Therefore,CEGH is a very attractive adsorbent that can be used to remove PFOA from water in the future.展开更多
文摘Biochar of agricultural and forestry waste is one of the core ways to solve the greenhouse effect, and it is also the key measure to improve the land productivity of China’s low yield fields and realize the sustainable development of agriculture. Due to the large area of China’s albic soil, the long-term drought and flood disasters make it a typical low-yield field, which has not been effectively treated. Biochar provides new hope for improving low-yield albic soil. This paper introduces the basic properties of biochar, the albic soil formation mechanism, the low yield of albic soil factors and the improving theoretical basis of biochar. The paper introduces the technical features of the albic soil improvement and the advantages of the albic soil improvement by biochar. In the view of ascending low production potential, solving the greenhouse effect, achieving agricultural sustainable development, the application value and development prospects of albic soil improved by biochar are discussed.
基金partially supported by the Wuhan Water Engineering & Technology Co. Ltd
文摘It is urgent to explore an effective removal method for perfluorooctanoic acid(PFOA)due to its recalcitrant nature.In this study,a novel chitosan-based hydrogel(CEGH)was prepared with a simple method using chitosan and ethylene glycol through a repeated freezingthawing procedure.The adsorption of PFOA anions to CEGH agreed well to the FreundlichLangmuir model with a maximum adsorption capacity as high as 1275.9 mg/g,which is higher than reported values of most adsorbents for PFOA.The adsorption was influenced by experimental conditions.Experimental results showed that the main removal mechanism was the ionic hydrogen bond interaction between carbonyl groups(COO-)of PFOA and protonated amine(NH^+)of the CEGH adsorbent.Therefore,CEGH is a very attractive adsorbent that can be used to remove PFOA from water in the future.
