Ladegaardherbert6425

72% and 0.87% of organic carbon, respectively. The highest percentage of organic carbon was measured in the fig soil at a depth of 0-15 cm (2.33%), whereas the lowest percentage (0.58%) was measured in the control soil at 15-30 cm. In total, fig tree with a good ability in carbon sequestration can be a good candidate for the forest management and rehabilitation especially in dry and semi dryland. Graphical abstract.In this work, zirconium chloride octahydrate/CTAB/vetiver grass-activated carbon (ZR/CTAB/VGAC) was prepared from vetiver grass-activated carbon (VGAC), using zirconium chloride octahydrate (ZR) and cetyltrimethylammonium bromide (CTAB) as modifiers. The optimized conditions of the simultaneous phosphate and nitrate removal by ZR/CTAB/VGAC were discussed, including amount of adsorbent, initial concentration, pH, contact time, and temperature. The simultaneous removal efficiency of phosphate and nitrate was 96.50% and 51.17% under optimized conditions. The structural and morphology of ZR/CTAB/VGAC was investigated by using automatic volumetric adsorption analyzer (BET), scanning electron microscopy (SEM), energy dispersive x-ray analysis (EDAX), and Fourier transform infrared spectroscopy (FTIR). It was found that the removal efficiencies of phosphate and nitrate were enhanced dramatically because ZR and CTAB were introduced on the surface of VGAC after modification. Moreover, the adsorption data fitted significantly well with Freundlich isotherm model. It was described well by pseudo-second-order kinetic model. Phosphate and nitrate adsorbed via chemisorption (ion exchange) by ZR, CTAB, and functional groups of the surface of ZR/CTAB/VGAC. Electrostatic adsorption of AC in ZR/CTAB/VGAC also played an important role in the adsorption process. ZR/CTAB/VGAC is an excellent adsorbent, which could be applied to remove nitrate and phosphate from wastewater.Intracellular phosphorus (P) accumulation can improve microalgal growth and lipid synthesis. However, large excess of P causes cell poisoning. selleck This study utilized a P-fed-batch strategy to investigate its potential to improve the utilization of the excessive P, while avoiding toxic side effects. This strategy contributed to a more complete utilization of the intracellularly stored P, which enhanced the microalgae biomass by 10-15% by upregulating the brassinosteroid growth hormone gene at a P-fed-batch frequency of 2-8. Furthermore, the lipid content increased by 4-16% via upregulation of lipid synthesis-related genes. As a result, the P-fed-batch strategy significantly increased the lipid production by 13-19%. The content of saturated fatty acid increased by ~ 100%, implying improved combustibility and oxidative stability. This is the first study of this P-fed-batch strategy and provides a new concept for the complete utilization of excessive P.Remediation of gold tailings is often difficult due to their extremely barren nature and highly heavy metal concentrations. Returning green manure and applying sewage sludge compost have the beneficial effects of providing nutrients and improving the soil environment. The effects of green manure plants, alfalfa (Medicago sativa L.), ryegrass (Lolium perenne Linn.), and tall fescue (Festuca arundinacea), returning in situ on nutrients, bioavailability of trace metals, and community structure of microorganism in gold tailings amended with 0%, 5%, and 10% (weight/weight) sewage sludge compost on the top 4 cm of tailings (SSC-5, SSC-10) were investigated in a pot experiment. The results showed that the plant biomass and microbial biomass carbon in tailings significantly increased in the treatments with sewage sludge compost. The available N and available P and the availability of Zn decreased markedly with the returning of alfalfa and ryegrass. Moreover, through high-throughput sequencing, it was found that the returning of alfalfa had positive effects on the bacterial community richness but a negative impact on the fungal community richness. The microbial community diversity was reduced in the treatment without sewage sludge compost amendment and with alfalfa returning. However, the microbial community diversity was enriched in the treatment of alfalfa returning with sewage sludge compost. In each plant species, 9 dominant bacterial phyla and 10 dominant fungi phyla could be detected. Returning alfalfa green manure and applying sewage sludge compost led to a relative increase in the abundance of Proteobacteria and Ascomycota. These results demonstrated that returning alfalfa and applying sewage sludge compost could be effective in the ecological restoration of gold tailings.Sludge treatment wetlands (STWs) have been applied worldwide to treat excess sludge; however, the performance of STWs is generally limited by weather partly due to the plants vegetated on the STWs. In this study, ventilation is suggested to assist unvegetated STWs. Solid samples from different depths were analysed. Additionally, the variation of microbial community in STW unit was analysed and the fate of heavy metals in the sludge was determined. Results indicate that the STW unit with suitable parameters has better performance in stabilising and maturing the sludge than planted STW, which may contribute to the variation of the microbial community; additionally, ventilation exerts a positive influence on these bacteria during the variation of microbial community and on heavy metal removal through the substrate and positively impacts the Cd and Pb in reduction state. Furthermore, ventilation decreases the bioavailability of Cr. With ventilation in STWs, Bacillus and Streptomyces play a necessary role in enhancing the possibility of sludge to be used as microbial inoculants.Objectives To investigate the antimicrobial resistance patterns of multidrug-resistant Acinetobacter baumannii (MDRAB) in patients in pediatric intensive care units (PICU) in order to determine a guide for the empirical antibiotic treatment of MDRAB. Methods The authors retrospectively evaluated the medical records of patients with MDRAB infections in the PICU during a follow-up period, between January 2015 and January 2017. The identification of A. baumannii was performed using a BD Phoenix 100 Automated Microbiology System. A BD Phoenix NMIC/ID-400 commercial kit was used to test antibiotic susceptibility. All data was entered into Microsoft Excel, and the data was analyzed using SPSS version 23.0. Results The mean age of the patients was 8.1 ± 6.2 y. In all, 46 isolates were obtained from 33 patients. The most effective antimicrobial agents were colistin, trimethoprim/sulfamethoxazole, and tigecycline. Nevertheless, with the exception of colistin, no antibiotic was associated with a susceptibility rate of >45% for the isolates.