二氧化碳捕集利用与封存项目纳入碳市场的现状、挑战与对策

二氧化碳捕集、利用与封存（CCUS）被认为是燃煤和燃气电厂以及钢铁、水泥和石化等行业实现碳中和的重要技术选项,而碳市场则是重要的市场化减排机制,提高两者的衔接水平,对于我国“双碳”目标的实现具有重要意义。通过总结国际上CCUS项目与碳市场衔接的成功经验,可以为我国CCUS项目与碳市场衔接提供相关借鉴。本文系统梳理了国内外CCUS项目纳入碳市场的立法、激励政策、CCUS减排核算方法学研究情况,识别出我国在CCUS项目与碳市场衔接方面尚存在法律支撑不足、缺乏激励政策以及CCUS项目碳减排核算方法不准确等一系列问题,最后提出多项建议以推动我国CCUS项目与碳市场的衔接：①完善碳市场监管和法律体系,促进CCUS与碳市场衔接;②研判CCUS优先领域,分阶段促进不同行业CCUS项目纳入碳交易市场;③强化政策激励,打通CCUS与碳市场衔接的投融资与成本疏导路径;④分阶段完善碳交易市场建设,充分发挥碳市场金融属性促进CCUS与碳交易市场衔接;⑤建立完善的监测、报告和核查（MRV）标准体系和证书制度,保证CCUS项目减排量核证的准确性和规范性。     

“双碳”目标下我国碳普惠制的探索与实践

基于我国“双碳”战略目标和绿色低碳转型发展,本文介绍了碳普惠制的定义、内涵及其与碳排放权交易制度的区别,对国内外碳普惠制的探索、实践进行梳理,通过对相关碳普惠平台的分析研究,提出碳普惠平台建设的业务框架设计,对生活服务业场景接入碳普惠平台进行分析和讨论。针对当前我国碳普惠发展存在的问题,提出相关政策建议,为国内碳普惠相关研究和应用提供参考。     

洗车废水混凝剂的选择

实验采用混凝工艺对洗车水进行预处理,选用4种无机混凝剂和1种有机混凝剂进行对比试验研究,通过实验结果分析确定了最佳药剂及其最佳投药量。     

检测重金属离子的酶膜生物传感器的构建

基于重金属对脲酶的特异性抑制作用,研制了可测定重金属离子的电位型酶膜生物传感器。论文考察了脲酶浓度、戊二醛浓度、温度和固定化时间等因素对电位响应的影响,获得了最佳的酶固定化条件,即酶浓度为0.8mg/mL,戊二醛为2.5%,温度为28℃,固定化时间为2h时酶固定化效果最好。同时还初步研究了该生物传感器的响应性能和再生能力。     

Metabolism-independent chemotaxis of Pseudomonas sp. strain WBC-3 toward aromatic compounds

Pseudomonas sp. strain WBC-3 utilized methyl parathion or para-nitrophenol (PNP) as the sole source of carbon, nitrogen, and energy, and methyl parathion hydrolase had been previously characterized. Its chemotactic behaviors to aromatics were investigated. The results indicated that strain WBC-3 was attracted to multiple aromatic compounds, including metabolizable or transformable substrates PNP, 4-nitrocatechol, and hydroquinone. Disruption of PNP catabolic genes had no e?ect on its chemotactic behaviors w...     

Phylogenetic analysis and arsenate reduction e ect of the arsenic-reducing bacteria enriched from contaminated soils at an abandoned smelter site

Microbial reduction of As(V) (i.e., arsenate) plays an important role in arsenic (As) mobilization in aqueous environment. In this study, we investigated As(Ⅴ) reduction characteristics of the bacteria enriched from the arsenic-contaminated soil at an abandoned smelter site. It was found that As(Ⅴ) was completely reduced to As(Ⅲ) (i.e., arsenite) in 21 h. After 3-d incubation, a yellow solid was precipitated and the concentration of As(Ⅲ) decreased sharply. After 150 h incubation, ca. 65% of soluble arsenic was removed from the solution. The analysis of the precipitate by scanning electron microscopy and energy dispersive spectrometer (SEM-EDS) and X-ray diffraction (XRD) revealed that the main component was crystalline arsenic sulfide (ASS). Microbial mediated reduction and mobilization of adsorbed As(Ⅴ) on ferric hydroxide was also examined. In the microcosm slurry experiment, ca. 53% of the adsorbed As(V) was reduced to As(Ⅲ) by the bacteria, which resulted in an appreciable release of arsenic into aqueous phase. The released arsenic was present predominantly as As(Ⅲ). The microbial diversity was analyzed by 16S rDNA-dependent molecular phylogeny. A near-full-length 16S rDNA gene clone library was constructed. The 197 clones were analyzed using RFLP (restriction fragment length polymorphism) and 72 OTUs were obtained, which contributed 51% of the content for total clone number in six OTUs. Six bacterial clones in these six OTUs were selected for sequencing and the sequenced clones were found to belong to the group Caloramator, Clostridium, and Bacillus.     

Simulation analysis of environmental risk accident and management of high-sulfur gas field development in complex terrain

Environmental risk of high sulfur gas field exploitation has become one of the hot spots of environmental management studies. Severe gas H₂S blowout accidents in recent years have shown that poor understanding and estimates of the poisonous gas movement could lead to dangerous evacuation delays. It is important to evaluate the real concentration of H₂S, especially in complex terrain. Traditional experiential models are not valid in the case of rough terrain, especially in low-lying areas where the gas accumulates. This study, using high sulfur content gas field of Sichuan “Pu Guang gas field” as study object and adopting objective diagnosis of wind field of land following coordinate three dimensions, applied Lagrangian Puff Model and breaking up technique of puffs to simulate the H₂S diffusion condition of blowout accidents produced in the high sulfur content gas field of complex terrain area. The results showed that the H₂S distribution did not occur mainly in low wind direction, and due to the obstruction of the mountain’s body, it accumulated in front of mountain on produced turn over, flowed around submitted jumping type distribution. The mountain waist near the hilltop and low hollow river valley site rapture points simulating contrast showed that the higher the rapture point, the better the diffusing condition of pollutant, the distribution of risk sensitive point decided piping rupture environmental risk size combining the H₂S diffusion result and residential area dispersing in the study area, synthetic judge located in the high rapture point environmental risk was smaller than the low hollow point, thus it was suggested to carryout laying of lining build of equal high line of higher terrain. According to simulation results, the environmental risk management measures aimed at putting down adverse effects were worked out.     

垃圾渗滤液层状砂箱参数拟合试验及模拟

基于相似模拟条件,研究了垃圾渗滤液污染物在层状含水层中运移规律,通过数值模拟方法拟合了层状含水层的渗透性及弥散度,利用拟合参数分析了阜新垃圾填埋场有机污染物在地下环境中的迁移和时空分布规律,该实验和数值模型较好地反映了层状土中污染物渗漏的基本特征,对预测、控制渗滤液污染地下水提供了一种有效的方法。     

电厂烟气脱硫机组改造取消GGH可行性研究分析

介绍了石灰石一石膏湿法烟气脱硫工艺及烟气换热器（简称GGH）在烟气脱硫（简称FGD）工程中的作用,指出安装GGH产生的烟囱腐蚀和增加系统故障等问题。实践证明烟气脱硫工程取消GGH对大气环境无明显影响,并且能产生较大的经济效益。