Ultrasound-assisted electrodeposition synthesis of nZVI-Pd/AC toward reductive degradation of methylene blue

Environmental Science and Pollution Research - A novel composite (nZVI/Pd-AC) was prepared by loading nanoscale zero-valent iron (nZVI) and Pd on activated carbon (AC) electrode under...     

Effect of pressure and atmosphere during hydrothermal treatment on the properties of sewage sludge-derived solid fuel

Journal of Material Cycles and Waste Management - Efforts to improve the performance of hydrothermal treatment (HT) in producing high-quality solid fuel from sewage sludge were carried out by...     

Using culturomics and social media data to characterize wildlife consumption

Wildlife provides food, medicine, clothing, and other necessities for humans, but overexploitation can disrupt the sustainability of wildlife resources and severely threaten global biodiversity. Understanding the characteristics of consumer behavior is helpful for wildlife managers and policy makers, but the traditional survey methods are laborious and time-consuming. In contrast, culturomics may more efficiently identify the features of wildlife consumption. As a case study of the culturomics approach, we examined tiger bone wine consumption in China based on social media and Baidu search engine data. Tiger bone wine is one of the most purchased tiger products; its consumption is closely related to tiger poaching, which greatly threatens wild tiger survival. We searched a popular social media website for the term “tiger bone wine” and focused on posts that were originally created from 1 January 2012 to 31 December 2018. We filtered and classified posts related to the purchase, sale, or consumption of tiger bone wine and extracted information on providers, consumption motivations, year of production, and place of origin of the tiger bone wines based on the texts and photos of these posts. We found 756 posts related to tiger bone wine consumption, 113 of which mentioned providers of tiger bone wine, including friends (53%), elder relatives (37%), peer relatives (7%), and others (3%). Out of the 756 posts, 266 indicated the motivations of tiger bone wine consumption. Tiger bone wines were consumed as a tonic (34%), medicine (23%), game product (30%), and a symbol of wealth (28%). Some posts indicated ≥2 consumption motivations. These findings were consistent with the search queries from Baidu index. Such information could help develop targeted strategies for tiger conservation. The culturomics approach illustrated by our study is a rapid and cost-efficient way to characterize wildlife consumption.     

1968～2018年洞庭湖江湖连通河道松滋口冲淤变化特征

探究江湖连通河道演变态势是评估重大人类活动事件对江湖关系变化影响的重要环节。以洞庭湖—荆江三口中松滋口河道为研究对象，通过建立其河道长期的水位—流量关系曲线分析其河道的冲淤变化特征，对其河道冲淤变化驱动因素进行分析，并采用实测河道断面资料验证其结果的可靠性。结果表明：水位—流量关系曲线法分析河道地形冲淤演变特征与实测横断面地形资料分析结果一致，松滋口河道同流量下水位下降对应于该时期河道冲刷，同流量下水位上升对应于河道淤积。不同时期松滋口东西分支河道冲淤变化主要驱动因素不同。1968～1981年间，下荆江裁弯引起的河势变化是西支新江口河道冲刷与东支沙道观河道淤积的主要诱因。1981～2003年间，其东西两支河道淤积主要是由于葛洲坝运行后引起的上荆江河道冲刷导致的。2003～2018年间，其河道冲刷主要是由于三峡大坝运行引起的河道水沙比例的大幅改变导致的。     

Industrial Cluster Upgradation of Regenerated Resources in Miluo City

With China's rapid economic growth, ecological construction and environmental protection become increasingly important. The regenerated resources industry is an effective way to solve problems, such as resources depletion, energy shortage, and pollution, and it also has strategic importance for the construction of a resource-conserving and environment-friendly society. The regenerated resources industry has been established in Miluo for long time, which includes a recycling system, a processing and utilization system, and a refuse decontamination system. An industrial cluster is in its early stage of development. In order to solve current problems, such as short industrial chain, low processing rate, and low added value, the industrial cluster should be dynamically upgraded by means of technology innovation, chain nucleus creation, and chain extension. We think the industrial cluster of regenerated resources will become a local brand for Miluo, from which other regions or cities will gain valuable experiences and inspirations.     

Demand forecasting of green metal materials using non-equidistant grey prediction with robust nonlinear interval regression analysis

Environment, Development and Sustainability - The main advantages of magnesium alloys are that they are lightweight, easy to recycle, and have high vibration absorption. These unique...     

Effect of combined addition amount of nano zero-valent iron and biochar on methane production by anaerobic digestion of corn straw

Environment, Development and Sustainability - Anaerobic digestion (AD) is an attractive straw resource treatment technology as it can improve the utilization efficiency of straw resource. Raw straw...     

Study on cooperative strategies of rural water environment governance PPP project between companies and farmers from the perspective of evolutionary game

Environment, Development and Sustainability - The PPP mode of rural water environment governance was conducive to attracting social capital for giving full play to the decisive role of the market...     

碘化阶层孔氧化硅纳米球对水中典型有机氯污染物的吸附性能研究

采用共缩聚法,成功地原位合成了碘改性的阶层多孔氧化硅纳米球（SiO₂-I）,研究了其基于卤键作用对典型有机氯污染物六六六的吸附性能,并考察了改性剂I-硅烷含量和pH值对吸附效果的影响.实验结果表明,该纳米材料对六六六表现出优异的吸附富集性能,吸附速率快,60 min内对六六六的去除率为71.6%,240 min内达到吸附平衡,去除率可达98.3%,最大吸附量为178.6 mg·g^-1;吸附动力学符合拟二级动力学模型;碘物种的加入提高了阶层多孔氧化硅的吸附速率和吸附效率.另外,为了便于纳米吸附材料的分离,本研究对SiO₂-I纳米球进行了磁性化.研究发现,磁性化修饰后,SiO₂-I纳米材料仍然保留对六六六优异的吸附富集性能,240 min时的吸附去除率达90.3%.     

不同空间划分方式下袁河流域景观结构对水质的影响

近年来景观结构的水文效应受到关注,研究不同空间划分方式下景观结构对河流营养盐、重金属变化的影响机制对于流域生态保护具有重要意义.本文于2018年7月和2019年1月在袁河干流及支流38个采样点采集水样,测定水体营养盐类污染指标（DO、NO₃^--N、NH₄⁺-N、TP和DOC浓度）和重金属类污染指标（Cr、Mn、Fe、Cu、Zn、As、Cd和Pb浓度）.基于前向变量选择、冗余分析等方法,筛选景观结构指标,量化其在不同尺度下对水体营养盐、重金属变化的影响.结果表明：①农田、斑块密度（PD）、斑块聚集指数（COHESION）及散布与并列指数（IJI）是影响水体营养盐变化的主要指标.林地、建设用地（Res）、平均最近邻体距离（ENN_MN）和最大斑块指数（LPI）的组合是影响重金属变化的主要指标.②在河岸缓冲带与圆形缓冲区划分方式下,景观结构均在100 m尺度对营养盐变化解释能力最强,平均解释率分别为31.5%、24.3%,均在1000 m尺度对重金属变化解释能力最强,平均解释率分别为32.0%、42.6%.③100 m河岸缓冲带和子流域尺度分别是景观结构影响水体营养盐、重金属变化的最佳空间尺度,平均解释率分别为31.5%、42.8%.以上结果表明,针对水体不同的污染类型,采用对应的划分方式及缓冲尺度有助于提高定量分析精度,为流域水环境保护、景观优化与管理提供科学依据.