火焰原子吸收分光光度法测定土壤中锌消化方法的改进

探讨了一种快捷有效的样品预处理方法，即采用王水和聚四氟乙烯密封高压罐微波消化法处理土壤样品。该法耗酸量少，操作简便，安全性好，避免了烦琐而冗长的操作，减少了人为误差，测定结果精密度高，准确性好。     

Elemental sulfur effects on Pb and Zn uptake by Indian mustard and winter wheat

A pot experiment was conducted to investigate the influence of elemental sulfur to contaminated soil on plant uptake by a heavy metal hyperaccumulator, Indian mustard( Brassica juncea ) and a field crop, winter wheat( Triticum. aestivum). Elemental sulfur(S) with different rates was carried out, they were 0(S0 ), 20(S20 ), 40(S40 ), 80(S80 ), and 160(S160 ) mmol/kg respectively. Extra pots with the same rates of S but without plants were used for soil sampling to monitor pH and CaCl2-extractable heavy metal changes. The results showed that S enhanced phytoextraction of Pb and Zn from contaminated soil. Application S effectively decreased soil pH down to 1.1 as the most at the rate of Sl60. The concentrations of CaCl2-extractable Pb and Zn in soil and uptake of Pb and Zn by the plants were increased with soil pH decreased. A good correlation between CaCl2-extractable Pb/Zn and soil pH was found( Rpb^2 = 0.847 and RZn^2 = 0,991, n = 25). With S application, soil CaCl2-extractable Pb and Zn concentrations, concentration of Pb and Zn in plants and the amount of removal by plant uptake were significanfly higher than those without S. Under the treatment of S160, the highest CaCl2-extmctable Pb and Zn were observed, they were 4.23 mg/kg and 0.40 mg/kg, 2.7 and 2.0 times as that of the control(So ) respectively. At the highest rates of S( Sl~0 ), both Indian mustard and winter wheat reached the highest uptake of Pb and Zn. The highest Pb concentrations in wheat and Indian mustard were 32.8 mg/kg and 537.0 mg/kg, all 1.8 times as that of the control, and the highest Zn concentrations in wheat and Indian mustard were 215.5 mg/kg and 404.0 mg/kg, 2.4 and 2.0 times as that of the control respectively. The highest removals of Pb and Zn from the contaminated soil were 0.41 rag/pot and 0.31 nag/pot by Indian mustard in the treatment of S160 through 50 days growth.     

战略环评已具试点时机——浅析“铬渣污染综合整治方案”战略环评的必要性

铬化合物是无机化工的主要系列产品之一，广泛应用于化工、轻工、冶金、纺织、机械等行业，我国国民经济中约15％的产品与铬化合物有关。随着经济的发展，铬盐作为基本化工原料，国内需求还将增长。铬盐行业的污染主要在于含铬废渣（包括铬渣、酸泥、铝泥等），而含铬废渣又会污染地表水和地下水，扬尘污染周边空气。经过近50年的发展，铬污染已几乎遍布全国各地，曾经生产和正在生产铬盐的区域都毫无疑问的受到污染，     

安徽省工业“三废”排放现状及发展趋势

近年来，由于工业的迅速发展，而“三废”处理设施跟不上，大量未经处理的废水，废气，废渣直接进入环境，是导致我省环境污染的主要原因。省人民政府地理信息中心根据省环保局资料建立了我省环境数据库，并利用ＧＩＳ技术对有关指标进行了分析，本文是对我省近几年来的“三废”排放现状及趋势作一具体探讨。     

从工业废物中回收重金属

介绍了用氧化－铬沉法从特殊钢酸洗废液中回收镍、铁、钼及从镉镍电池废渣中回收镉，镍等金属金属制成多种化合物的原理，工艺流程及结果。     

免助燃剂型有机化工废渣焚烧装置

本文介绍了免助燃剂型有机化工废渣焚烧装置的性能、特点处理流程及效果与社会经济效益。