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As an effective means to promote photoinduced carrier separation, the construction of Z‐scheme heterojunction photocatalysts can be widely used for the degradation of organic pollutants. In this work, an innovative peanut shell biochar/Ag3PO4/AgI ternary composite was prepared, and the chemical compositions, structural morphology, optical and photoelectrochemical properties of the photocatalyst were characterized. The peanut shell biochar/Ag3PO4/AgI composite delivered a high photodegradation efficiency of MB at 99.7 % in 60 min with kinetic constant of 0.0366 min−1, which is about 3.81, 9.89, and 1.17 times that Ag3PO4 (0.0096 min−1), AgI (0.0037 min−1) and Ag3PO4/AgI (0.0313 min−1), respectively. Meanwhile, the composite also exhibits excellent photocatalytic activity for methyl orange, rhodamine B, congo red, tetracycline and ofloxacin. Based on radical capture experiments and photoelectrochemical test, the possible photocatalytic mechanism was revealed. Compared with monomers, biochar/Ag3PO4/AgI exhibits higher photocatalytic degradation activity under visible light irradiation, which was due to the introduction of electron‐transporting biochar into the composite, and the formation of heterostructure between Ag3PO4 and AgI, which enhance the separation rate of photoinduced carriers. The excellent stability and photocatalytic activity make peanut shell biochar/Ag3PO4/AgI an ideal photocatalyst to solve environmental crisis. [ABSTRACT FROM AUTHOR]

Water‐soluble ratiometric AIE‐active fluorescent organic nanoparticles 2OA‐FON for the specific sensing of cysteine over other biothiols are reported. The obtained amphiphilic probe included olefin aldehyde as recognizing unit, tetraphenylethylene as fluorescence reporter and lactose moiety as a hydrophilic group. This work provides a general design strategy based on the introduction of a sugar moiety into a hydrophobic AIEgen to develop ratiometric water‐soluble fluorescent organic nanoparticles. [ABSTRACT FROM AUTHOR]

Agricultural products are a primary pathway for humans to accumulate heavy metals (HMs) via the soil-crop system and should therefore should be included as a crucial part of the food security in our country. Given that previous studies on protection zoning for preventing farmland HM pollution rarely considered agricultural products as a basic element, this study attempted to establish a zoning system for farmland HM prevention, which was based on the perspective of agricultural product pollution. We subsequently took a representative peri-urban area in the black soil region, which was provided with a higher risk of being polluted, as an empirical case. The results indicated that:① the comprehensive quality index of agricultural products (IICQ AP ) was 1.09, illustrating only a mild HM pollution, with Pb and Ni having the highest accumulation levels; ② the human health risk index ( Q HI ) was 0.61, showing no risk for human health; and ③ the designed zoning method revealed 89.45% of the farmlands to be risk-free at the moment and 10.55% of the farmlands to be under low risk of HM pollution in agricultural products. According to the zoning results, we suggested prioritized protection and an early-warning strategy, respectively, and further recommended prevention methods such as accumulation intervention, crop restructuring, and in-situ passivation. The results served to enrich the theoretical basis for preventing farmland HM pollution, to reinforce the management standards for agricultural products in the black soil region, and also to build a differentiated urban-rural farmland protection system.

Objective: To study the clinical characteristics of fulminate pancreatitis (FP) and analysis the factors related to prognosis of FP., Methods: Data of 203 patients with severe acute pancreatitis (SAP) admitted to our hospital within 72 h after onset of symptoms from January 2000 to December 2002 were reviewed. FP was defined as presence of organ dysfunction within 72 h after onset of symptoms. 78 patients had FP, 125 patients without organ dysfunction within 72 h after onset of symptoms had common severe acute pancreatitis (CSAP). The clinical characteristics, incidence of organ dysfunction during hospitalization and prognosis between FP and CSAP were compared, then the factors related to prognosis of FP were analysed., Results: The incidences of T >/= 38.5 degrees C, hypoxemia, shock, white cell count >/= 16 x 10(9)/L, serum calcium < 2.0 mmol/L and multiple organ dysfunction syndrome (MODS) in FP were higher than those in CSAP (71.8% vs 39.2%, 83.3% vs 30.4%, 41.0% vs 12.0%, 64.1% vs 30.4%, 68.0% vs 44.8%, 73.1% vs 11.2%, P < 0.05). Impairment degree of pancreas (Balthazar CT severity index) in FP was more serious than that in CSAP (5.78 +/- 0.83 vs 3.12 +/- 0.57, P < 0.05). FP had a higher mortality than CSAP (44.9% vs 8.8%, P < 0.05). In multiple logistic regression analysis, the main predisposing factors to FP were hypoxemia, MODS and Balthazar CT severity index., Conclusions: FP is characterised by severe systemic inflammatory response, severe pathological changes of pancreas, high incidence of MODS and high mortality. The main predisposing factors to FP were hypoxemia, MODS and Balthazar CT severity index.