Microbial flocculant and its application in environmental protection

１ＩｎｔｒｏｄｕｃｔｉｏｎＡｌｏｔｏｆｖａｒｉｅｄｆｌｏｃｃｕｌａｎｔｓｈａｖｅｂｅｅｎｕｓｅｄｉｎｗａｓｔｅｗａｔｅｒｔｒｅａｔｍｅｎｔ，ｄｒｅｄｇｉｎｇｄｏｗｎｓｔｒｅａｍｐｒｏｃｅｓｓｉｎｇａｎｄｓｏｍｅｉｎｄｕｓｔｒｉａｌｆｉｅｌｄｉｎｃｌ...     

国内外环境监测分析的现状和发展

从实验室分析仪器和技术、与污染物总量控制有关的自动监测系统和技术，与应急事故监测有关的现场简易监测分析仪器和技术等方面概括介绍了环境监测分析仪器和技术的现状与发展，并概要介绍了日美及中国环境监测分析产业的现状与发展。     

大气中苯乙烯的气相色谱法测定

采用活性炭管吸附大气中基苯乙烯，以二硫化碳洗脱，以溴水加成后，用气相色谱电子捕获器测定苯乙烯的二溴加成物。本方法适合于检测多种污染物共存的大气中痕量苯乙烯。其线性范围为０．０１５－０．７４ｎｇ，最低检出浓度为０．００１ｍｇ／ｍ＾３；重现性实验的变异系数为２．３％：当活性炭管吸附苯乙烯在２．９μｇ时，回收率为９０％，吸附苯乙烯０．２９μｇ时，回收率为７２％。     

渭北黄土高原苹果优质气候层带分析

本文利用元帅系苹果定位试验的品质测定资料,分析研究了苹果品质(含糖量、含酸量、硬度等)与海拔高度及其垂直气候层带的关系,认为我国渭北黄土高原海拔1000—1500m 范围的半湿润、半干旱地区,是全国苹果品质最佳的优质气候区。这一层带的气候-土壤生态条件,适宜于发展优质苹果生产和建立商品生产基地。     

高分辨率遥感影像在生态环境状况评价中的应用——以戚浦塘生态调查为例

以苏州市戚浦塘疏浚工程生态调查为例,分别解译分辨率30 m和2.5 m的遥感图像,对比分析解译结果,量化研究了不同分辨率的解译数据对生物丰度指数、植被覆盖指数和生态环境状况指数的影响,为进一步探讨高分辨率遥感图像在区域生态环境状况评价中的应用指明了方向.     

高硫原油加工过程硫回收水平分析

分析了金陵分公司最近三年来加工高硫原油带入的硫在全厂炼油过程的分布情况。随着原油加工量及含硫量的快速增长，硫回收能力凸现不足，表明目前正在加速建设的加氢精制和硫磺回收装置是十分必要的，这将进一步提高综合硫回收水平。从长远来看，还需采用扩大加氢工艺能力，在提升产品质量的同时达到减少硫向环境排放的目的。     

抚仙湖面源污染特征及其防治对策

根据抚仙湖径流区污染物负荷量的调查结果,抚仙湖水污染特征以面源为主,面源入湖水量占98%,TP占81.4%,TN占85.9%,因此控制面源是保护抚仙湖的关键。提出了防治抚仙湖面源污染的生态治理及工程治理对策。     

我国生态工业园区稳定性的调研报告

作为可持续发展的重要实践工具，生态工业园（EIPs）建设得到快速推进的同时，也由于多方面存在的影响因素制约，使园区面临“不稳定”风险．本调研报告通过专家调查和全国范围内的统计调查确认了“技术充足，政府支持，行业多样，核心组员，成员沟通”等5个影响因素对我国生态工业园区稳定发展具有显著影响，并对数据结果做了进一步的讨论，提出了相应的政策建设。     

Robust magnetic laccase-mimicking nanozyme for oxidizing o-phenylenediamine and removing phenolic pollutants

In this study, we report a novel magnetic biomimetic nanozyme(Fe_3O_4@Cu/GMP(guanosine5′-monophosphate)) with high laccase-like activity, which could oxidize toxic ophenylenediamine(OPD) and remove phenolic compounds.The magnetic laccase-like nanozyme was readily obtained via complexed Cu~(2+)and GMP that grew on the surface of magnetic Fe_3O_4 nanoparticles.The prepared Fe_3O_4@Cu/GMP catalyst could be magnetically recycled for at least five cycles while still retaining above 70% activity.As a laccase mimic,Fe_3O_4@Cu/GMP had more activity and robust stability than natural laccase for the oxidization of OPD.Fe_3O_4@Cu/GMP retained about 90% residual activity at 90℃ and showed little change at pH 3–9, and the nanozyme kept its excellent activity after long-term storage.Meanwhile, Fe_3O_4@Cu/GMP had better activity for removing phenolic compounds, and the removal of naphthol was more than 95%.Consequently, the proposed Fe_3O_4@Cu/GMP nanozyme shows potential for use as a robust catalyst for applications in environmental remediation.     

In situ preparation of g-C3N4/Bi4O5I2 complex and its elevated photoactivity in Methyl Orange degradation under visible light

A graphite carbon nitride(g-C_3N_4) modified Bi_4O_5I_2 composite was successfully prepared insitu via the thermal treatment of a g-C_3N_4/Bi OI precursor at 400°C for 3 hr.The as-prepared g-C_3N_4/Bi_4O_5I_2 showed high photocatalytic performance in Methyl Orange(MO) degradation under visible light.The best sample presented a degradation rate of 0.164 min~(-1),which is 3.2 and 82 times as high as that of Bi_4O_5I_2 and g-C_3N_4,respectively.The g-C_3N_4/Bi_4O_5I_2 was characterized by X-ray powder diffractometer(XRD),scanning electron microscopy(SEM),transmission electron microscopy(TEM),Raman,X-ray photoelectron spectroscopy(XPS),ultraviolet-visible diffuse reflectance spectra(DRS),electrochemical impedance spectroscopy(EIS) and transient photocurrent response in order to explain the enhanced photoactivity.Results indicated that the decoration with a small amount of g-C_3N_4 influenced the specific surface area only slightly.Nevertheless,the capability for absorbing visible light was improved measurably,which was beneficial to the MO degradation.On top of that,a strong interaction between g-C_3N_4 and Bi_4O_5I_2 was detected.This interplay promoted the formation of a favorable heterojunction structure and thereby enhanced the charge separation.Thus,the g-C_3N_4/Bi_4O_5I_2 composite presented greater charge separation efficiency and much better photocatalytic performance than Bi_4O_5I_2.Additionally,g-C_3N_4/Bi_4O_5I_2 also presented high stability.·O_2~-and holes were verified to be the main reactive species.