信用评价，剑指环境失信行为——超标排放企业污染整治调查

今年1月，环保部会同国家发改委、人民银行、银监会联合发布《企业环境信用评价办法（试行）》，剑指企业环境失信行为，破解环保违法成本低的难题。此次环境信用评价办法在全国的铺开，引起了外界的诸多关注，有人认为办法的出台将有助于促进企业规范环境行为，改善日益严峻的环境问题；有人则指出，办法未必能够真正管住污染。真相又是怎样的呢？     

手工电弧焊的安全技术

由于手工电弧焊（俗称电焊）具有使用简单,操作灵活,适用性强,成本低等优点,使得手工电弧焊技术广泛应用于各工业领域。     

Organic pollutants removal from 2,4,6-trinitrotoluene （TNT） red water using low cost activated coke

2,4,6-trinitrotoluene (TNT) red water from Chinese explosive industry was adsorbed by activated coke (AC) from lignite. Since the composition of TNT red water was very complicated, chemical oxygen demand (COD) was used as the index for evaluating the treatment efficiency. This study focused on the sorption kinetics and equilibrium sorption isotherms of AC for the removal of chemical oxygen demand (COD) from TNT red water, and the changes of water quality before and after adsorption were evaluated by using high performance liquid chromatograph (HPLC), UV-vis spectra and Gas Chromatography/Mass Spectroscopy (GC/MS). The results showed that the sorption kinetics of adsorbing COD from TNT red water onto AC was fitted well with the pseudo-second order model. The adsorption process was an exothermic and physical process. The sorption isotherm was in good agreement with Redlich–Peterson isotherm. At the conditions of initial pH, 20℃ and 3 hr of agitation, when the AC dosage was 160 g L-1, 64.8% of COD could be removed. The removal efficiencies of 2,4-dinitrotoluene-3-sulfonate (2,4-DNT-3-SO3-) and 2,4-dinitrotoluene-5-sulfonate (2,4-DNT-5-SO3-) were 80.5% and 84.3%, respectively. After adsorption, the acute toxicity of TNT red water reduced 81.8%, compared with that of unprocessed TNT red water.     

水污染防治法加大水污染违法成本

针对“守法成本高,违法成本低”的问题,十届全国人大常委会第三十二次会议2月28日表决通过修订后的水污染防治法,加大了水污染违法成本,增强了对违法行为的震慑力。