Clomazone dissipation, adsorption and translocation in four paddy topsoils

IntroductionClomazone,(2 [(2 chlorophenyl)methyl ] 4 ,4 dimethyl 3 isoxazolidinone) ,isasoil appliedisoxazolidinoneherbicideproducedbyFMCCorp .Itisintroducedforannualgrassandbroad spectrumweedsinsoybeans(Rani,1998;Vyas,2 0 0 0 ) .Itisalsocurrentlyregis…     

Rapid treatment of atrazine-contaminated water by nickel/iron bimetallic system

The utility of nickel/iron in the remediation of atraz.ine-contaminated water was investigated. The experimental results showed that nickel/iron had effective catalytic activity in dechlorinating atraz.ine under acidic conditions. The dechlonnation reaction approximately followed the first-order kinetics under the experimental conditions( nickel/iron: 1.0 g/250 ml: Ca~r~ = 20.0 mg/L), the reaction rate increased with decreasing pH value of the reaction solution and increasing the proportion of Ni: Fe within 2.95 %. For condition with 2.95% nickel/iron, the reaction rate constants were 0.07518( R = 0.9927), 0.06212( R = 0.9846) and 0.00131 min^-1 ( R = 0.9.565) at pH = 2.0, 3.0 and 4.0, respectively. HPLC analysis was used to monitor the decline of atraz.ine concentration.     

Treatment of anthraquinone dye wastewater by hydrolytic acidification-aerobic process

Experiment on microbial degradation with two kinds of biological process, hydrolytic acidification-aerobic process and aerobic process was conducted to treat the anthraquinone dye wastewater with CODc, concentration of 400 mg/L and chroma 800. The experimental result demonstrated that the hydrolytic-aerobic process could raise the biodegradability of anthraquinone dye wastewater effectively. The effluent CODc, can reach 120-170 mg/L and chroma 150 which is superior to that from simple aerobic process.     

己内酰胺生产废水处理技术

采用ENSBR-BDAR-BCOR工艺处理某化纤公司高含氮己内酰胺生产废水,在污泥负荷为0.15～0.28g/(g·d)、进水COD不高于6200mg/L、NH3-N质量浓度不高于560mg/L的情况下,出水COD不高于150mg/L、NH3-N质量浓度不高于20mg/L,COD和NH3-N的去除率分别达到98%和96%,系统可同时除碳脱氮。     

合成氨造气系统废热锅炉两次爆炸的分析

广西玉林化肥厂合成氨生产是在高温、高压、易燃、易爆、易中毒的情况下进行的,工艺条件复杂,设备管线长,易出现突发事故且事故原因隐蔽。本文就该厂造气工段废热锅炉发生的两次大爆炸事故,进行分析并介绍处理措施,供类似工厂借鉴。     

危化品安全监管电子政务系统的设计研究

分别从省、市、地(市)和企业角度分析危化品安全监管电子政务系统对危险源、事故隐患和危险化工工艺等的监管流程和报表.同时,结合地理信息系统(GIS)技术设计系统数据库,并提出该系统应该具有事故隐患管理、重大危险源管理、危险化工工艺管理、统计分析功能和企业基本信息这5个主要功能模块.危化品安全监管电子政务系统可为政府和危化企业等单位提供科学、高效的信息化管理工具,具有较好的推广应用前景.     

煤气脱硫系统工艺装备改造安全技术探讨

<正>山西太原钢铁集团有限公司临汾钢铁焦化厂化产车间脱硫工序,是2004年配合焦化厂煤气净化改造工程新建的一套湿式氧化法脱硫工艺系统。它是以氨为碱源的HPF法脱硫工艺,其流程大致如下:鼓风机后的煤气与蒸氨塔顶来的     

化工装置火灾事故处置对策

近年来,化工工业发展迅速,新型化工生产工艺日益向高深发展,工艺过程相当复杂,化学危险物品泄漏、火灾、爆炸事故时有发生。熟悉和掌握化工企业火灾事故发生的规律及处置方法日益重要。     

改良西门子工艺生产多晶硅的安全问题

本文结合我国多晶硅行业的实际情况,针对改良西门子工艺的特点,对多晶硅生产过程中涉及的危险有害物质和危险有害因素进行了系统全面的分析,并提出了合理可行的安全对策和建议。     

2009福建省期刊协会年会

漆画是以天然大漆为主要颜料．在借鉴传统漆器工艺技法的基础上,溶入现代绘画艺术手法,将“画”和“磨”有机地结合起来,使其制作出来的画具有色调明朗、深沉、立体感强、表面平滑光亮等特点。其制作方法是：先以生漆和瓦灰按脱胎工艺技法在木板上上漆打底、磨制光滑．