耐火材料企业职业伤害危险因素的病例对照研究

职业伤害是劳动生产中的一个重要问题,据估计,全世界每天要发生1500多万起职业事故,可造成人体伤害,使人残废甚至死亡,同时造成很大的经济损失。职业伤害事故是由多种因素作用造成的,包括人为因素、环境因素、生产组织与管理等方面因素。另外,事故的发生除考虑环境因素外,还存在职员的个体因素,即存在体力、智力、生活习惯、心理特征等个体差异。因此,大约75％的事故发生于25％的人群中。     

创新安全管理 建立长效机制

创新是一个民族进步的灵魂,是一个国家兴旺发达的不竭动力,也是一个企业搞好安全工作的源泉今年是“十一·五”规划的头一年为了起好步,开好局,维护职工利益,促进企业稳定、健康发展,创新安全管理,建立安全长效机制,可取得明显效果,有几个较好管理方法可供参考,兹列于下:一、实行班组安全目标化管理选好班组长,筑牢企业安全生产第一道防线。在选班组长时,坚持思想素质好、业务技术好、品德好、民主作风好,择优选取。二、以保持共产党员先进性教育为契机,充分发挥“一个党支部一个战斗堡垒、一个党员领导干部一根标杆、一个党员一面旗帜”作…     

尿素对除草剂氯磺隆在三种土壤上的吸附影响

利用平衡吸附法研究了三种供试矿物对氯磺隆的吸附及尿素对吸附的影响。供试矿物对氯磺隆的吸附符合Langmuir方程,最大吸附量大小顺序为:非晶形氧化铝(2322μg/g)针铁矿(2071μg/g)高岭土(1326μg/g);尿素的加入使得磺酰脲除草剂氯磺隆在非晶形氧化铝、针铁矿表面的吸附量都有不同程度的下降,其中非晶形氧化铝降低的幅度最大,但在高岭土表面的吸附量有所增加,且尿素和氯磺隆同时加入时增加更显著。     

瘦西湖水质时空特征及综合控制对策措施研究

分析了瘦西湖水质时空特征和富营养成因,提出浅湖型湖泊富营养化治理需加强区域水系水质管理,提出"防、活、治、修"综合治理措施.     

海平面变化及其对海洋生态环境的影响

世界约有一半人口生活在距海岸线50公里以内的沿岸地区,人口密度平均较内陆高出10倍,因此海平面变化与人类生活和社会经济发展休戚相关.随着人类活动对海洋、大气系统影响的迅速扩大,全球气候异常、海平面变化已经成为全球性重大环境问题.     

石油类污染物在包气带中的迁移预测——以兰州西固商业石油储备库为例

包气带在地表石油类污染物下渗到地下水的过程中扮演着重要角色,同时包气带受到污染必然会对周围环境,特别是植物的生长造成影响,从而影响人类自身。主要使用HYDRUS软件预测了兰州西固商业石油储备库的渗漏对包气带的影响,分正常工作状况和非正常工作状况两种情况。在正常工作状况下,从5000天到10000天,污染物浓度呈线性增加,到50年左右,包气带底部(下边界)污染物浓度接近0.1mg/cm3。在非正常工作状况下,包气带底部(下边界)浓度增加的速度要远远大于正常工作状况,到50年左右,包气带底部(下边界)浓度达0.5mg/cm3。预测结果可以为相应工作状况下饱和带的溶质迁移模型提供参考依据,对确定饱和带污染物的浓度具有重要的参考意义。     

生活垃圾焚烧炉污染物排放分析

简要介绍了生活垃圾焚烧妒的炉型、烟气净化技术的选择、飞灰固化的常用处置方式,通过分析不同生活垃圾焚烧炉的烟气监测数据,说明生活垃圾焚烧炉烟气排放能够达到GB 18485-2001<生活垃圾焚烧污染控制标准>相应标准限值,有些烟气污染物甚至能达到欧盟排放标准.     

茶园土壤水溶性氟含量的模拟调控

以湖北英山、大悟、竹山、赤壁和浙江杭州茶园土壤为研究对象,通过施加一定量的CaCO3、CaO、Ca3(PO4)2、CaCl2和CaSO4来调控土壤中水溶性氟含量,结果表明：英山、大悟和竹山茶园土壤中施加一定量的CaCl2或CaSO4均可降低土壤中水溶性氟含量,英山和大悟茶园土壤中可施加1～2 g·kg-1的CaCl2或...     

Temporal and spatial evolution characteristics of sunshine duration over Qinghai-Tibet Plateau from 1961 to 2020北大核心CSCD

Based on observation data of daily sunshine duration from 1961 to 2020 at 175 meteorological observation stations over Qinghai-Tibet Plateau and its surrounding areas, spatial transformation analysis, climate trend analysis and M-K mutation test were used to analyze the temporal and spatial variation characteristics of the seasonal and annual sunshine duration in the region in the last 60 years. The results show that (1) annual average sunshine duration was 2 323 h, the maximum was 3 487 h in Gaer, Tibet, and the minimum was 771 h in Ya'an, Sichuan. The high-value areas were mostly located in western Tibet, northern Qinghai, western Gansu, and Xinjiang, and the low-value areas were mostly located in Nyingchi in Tibet, the mountainous area on the western edge of the Sichuan Basin, and northwestern Yunnan. The highest sunshine duration was recorded in winter (631 h), and the lowest was recorded in autumn (555 h) among the four seasons. (2) The average decrease in annual sunshine duration was 10.27 h/10 a. The largest rates of decrease were mainly in Gannan of Gansu and Ganzi of Sichuan, with the largest rate of decrease of 130 h/10 a. The areas with large rates of increase were mainly in Hotan area of Xinjiang, Liangshan of Sichuan and Lhasa of Tibet, with the largest increase of 61 h/10 a. Among the four seasons, spring exhibited an upward trend, and the remainder exhibited a downward trend. (3) Before 2017, the annual sunshine duration increased but declined after 2017. Spring sunshine duration had the largest number of mutation years, and the earliest mutation time was 1963. Winter had the fewest number of mutation years and the latest mutation time occurred in 2015. In summary, the annual and seasonal sunshine duration of Qinghai-Tibet Plateau vary greatly in space, but with the general characteristics of more sunshine in the northwest and less in the southeast, and sunshine hours were mainly decreasing, with 2017 as a mutation point of annual sunshine duration. Most areas of Qinghai-Tibet Plateau have great potential for photosynthetic production and are suitable for the development of light-loving plants and high-density planting. Shade-loving or shade-tolerant plants, including tea, are suitable for development in remote mountainous areas with low sunshine values in the western part of the basin, including Ya’an, Sichuan, and other areas, such as Medog, Tibet. © 2022 Science Press. All rights reserved.