基于“三线一单”流域开发规划替代方案环评研究

针对我国流域规划环评中替代方案不足的问题,提出基于“三线一单”环境管理要求建立评价指标体系,并采用快速影响评价矩阵（RIAM）实施规划替代方案综合评估.针对福建晋江流域开发规划环评的研究结果显示,采用研究建立的评价指标和方法可以有效地对6个规划替代方案的主要生态环境影响进行综合评价,其中方案Ⅱ在优化水资源配置、保障下游生态用水、严控小水电开发等方面更具优势,可作为推荐方案并进入详评阶段.本研究建立的替代方案评价指标和方法,对于在流域开发规划环评中落实“三线一单”管理要求、促进规划编制与环评过程互动和提高评价效率具有有利作用.     

低碳理念融入房地产开发项目环境影响评价的探讨

我国房地产业蓬勃发展,建筑能耗增长迅速,环境影响评价作为我国重要的环境管理强制手段,可考虑在已有的评价体系中加入低碳指标应用于房地产开发项目环境影响评价中。本文首先从理论上探讨低碳融入房地产开发项目环评的可行性及必要性的基础,进而参考借鉴国内外研究构建包含生态质量、建筑质量、过程质量和社会综合质量四部分的房地产开发项目低碳环评指标体系,并基于环评的三大主体对房地产低碳环评实施推广途径进行研究。     

房地产开发项目环境影响评价有关问题探讨--以住宅小区建设项目为例

房地产开发项目的环境影响评价方法与污染型工业项目以及非污染生态影响型项目的评价方法均有所不同.本文以住宅小区建设项目环评为例,从评价标准的选择、评价重点和景观生态评价三个方面,对该类项目的环境影响评价方法和有关问题进行了探讨.     

生态旅游战略环境评价的方法系统研究

本文构建了生态旅游战略环境评价的方法系统,即:(1)模糊数学法进行战略初步判断;(2)清单法进行环境影响识别;(3)承载力分析法进行环境影响预测;(4)可持续发展能力评判法进行综合评价。并应用该方法系统对黑龙江省绥化市金龟山庄的生态旅游项目进行实证研究。     

沿海港口总体规划生态承载力环评技术方案

生态承载力评价是区域经济社会可持续发展的重要参考基准,但常规区域生态承载力综合评价方法不能针对规划项目产生的具体资源环境效应及其空间影响格局展开评估.研究基于压力(P)-状态(S)-响应(R)模型,以沿海港口总体规划生态承载力环评为例,在分析港口总体规划对海岸带潮上带、潮间带、潮下带3类生态环境空间产生不同资源环境压力类型的基础上,探索建立了包括陆域土地资源承载力评价、潮间带岸线资源承载力评价、潮间带围填海承载力评价、潮下带水环境容量评价及海岸带生态系统承载力评价在内的海岸带工程项目生态承载力环评技术方案,以期提升海岸带开发利用自然资源、保护生态环境的科学性,并为推进我国工程项目生态承载力环评技术革新提供借鉴.     

生态旅游战略环境评价的方法系统研究

本文构建了生态旅游战略环境评价的方法系统，即：（1）模糊数学法进行战略初步判断；（2）清单法进行环境影响识别；（3）承载力分析法进行环境影响预测；（4）可持续发展能力评判法进行综合评价。并应用该方法系统对黑龙江省绥化市金龟山庄的生态旅游项目进行实证研究。     

公路项目环评中的环境影响经济评价

按照亚洲开发银行在1996年提出的环境影响经济评价步骤与框架,对公路项目环评中的环境影响经济评价过程与常用方法进行了分析.在此基础上,分析了目前公路环评中的环境影响经济评价在环境影响的量化与价值评估方法使用中所存在的问题,指出在环境影响经济评价过程中,环评人员可能面对众多困难,如存在没有可用的剂量反应关系,统计数据缺乏等问题.因而,从目前来看,环境影响经济评价可能更适合在研究层面上开展,对建设项目的环境影响进行通则性的经济评价还有一定难度.     

水环境承载力与战略环评在水电项目中的体现与研究

本文分析了水资源承载力和战略环评的相关概念,以及水利工程对环境的影响.通过对目前水电项目环境影响评价现状进行分析,指出了战略环评在水电项目中将要发挥的重要作用.并且进一步探讨了水电项目环境影响研究的趋势,为今后合理开发水电资源,促进人类社会的可持续发展提供了评价的思路.     

关于化工项目环境影响评价要点及专家关注点的思考

化工项目的环境影响因素复杂多样,从产业政策、工程分析、环境影响和预测评价、环境风险影响评价、公众参与等方面,探讨化工项目环境影响评价过程中要注意的要点及专家关注点,为今后化工项目环评提供参考.     

累积影响评价:中国内地与香港的问题与实践探讨

将过去、现在和将来的其它活动包括在建议活动的评价范围 ,是累积影响评价区别于传统EIA的重要特征和关键环节 ,也是EIA进一步发展完善的重要趋势 .从法规要求、文本格式、时空范围、重点内容、减缓措施等方面 ,分析了内地和香港在环评实践过程中对累积影响的考虑状况及存在问题 .建议制定累积影响评价的技术方法导则 ,以法规的形式明确提出在项目、区域及策略环评中增加累积影响评价的内容 ,累积影响应在环评报告的摘要、目录及结论中专门列出 ,对累积影响时空范围的界定及重要性的判断应专门提供支持依据 ,评价的重点应较多地关注生态完整性、社会经济影响及全球性环境影响等 ,以更有效地预防累积环境影响问题 .     

Distribution and ecological effect of mercury in Laogang landfill, Shanghai, China

Laogang landfill near Shanghai is the largest landfill in China, and receives about 10000 t of daily garbage per day, Samples of topsoil and plants were analyzed to evaluate mercury pollution from the landfill. For topsoil samples, there were significant correlations among total mercury （HgT）, combinative mercury （Hgc） and gaseous mercury （HgG）, and content of total organic carbon （TOC）, but, no significantly relationship was found between Hg content and filling time. Hg content changes in vertical profiles with time showed that the average Hgv of profiles 1992, 1996, and 2000 was similar, but their average HgG was quite different. HgT was significantly correlated with Hgc in profile 1992 and 2000, and Hgv was significantly correlated with Hg6 in profile 1996. HgG/Hgv ratio in profile samples decreased in the order of （HgG,/HgT）1992〉（HgG/HgT）1996〉〉（HgG/HgT）2000. A simple outline of Hg release in landfill could be drawn： with increasing of filling time, degradation undergoes different biodegradation, accordingly, gaseous mercury goes through small, more, and small proportion to total mercury. Distribution of Hg in plants was inhomogeneous, following the order of leaf〉root〉stem. The highest value of leaf may be associated with higher atmospheric Hg from landfill. Ligneous plants （e.g. Phyllostachys glanca, Prunus salicina and Ligustrum lucidum） are capable of enriching more Hg than herbaceous plants.     

EDTA-enhanced phytoremediation of lead contaminated soil by Bidens maximowicziana

Phytoremediation is a potential cleanup technology for the removal of heavy metals from contaminated soils.Bidens maximowicziana is a new Pb hyperaccumulator,which not only has remarkable tolerance to Pb but also extraordinary accumulation capacity for Pb.The maximum Pb concentration was 1509.3 mg/kg in roots and 2164.7 mg/kg in overground tissues.The Pb distribution order in the B. maximowicziana was:leaf>stem>root.The effect of amendments on phytoremediation was also studied.The mobility of soil Pb and the Pb concentrations in plants were both increased by EDTA application.Compared with CK(control check),EDTA application promoted translocation of Pb to overground parts of the plant.The Pb concentrations in overground parts of plants was increased from 24.23-680.56 mg/kg to 29.07-1905.57 mg/kg.This research demonstrated that B.maximowicziana appeared to be suitable for phytoremediation of Pb contaminated soil,especially,combination with EDTA.     

Decomposition of alachlor by ozonation and its mechanism

Decomposition and corresponding mechanism of alachlor, an endocrine disruptor in water by ozonation were investigated. Results showed that alachlor could not be completely mineralized by ozone alone. Many intermediates and final products were formed during the process, including aromatic compounds, aliphatic carboxylic acids, and inorganic ions. In evoluting these products, some of them with weak polarity were qualitatively identified by GC-MS. The information of inorganic ions suggested that the dechlorination was the first and the fastest step in the ozonation of alachlor.     

Enzymatic oxidation of aqueous pentachlorophenol

The influence of the nonionic surfactant Tween 80 on pentachlorophenol （PCP） oxidation catalyzed by horseradish peroxidase was studied. The surfactant was tested at concentrations below and above its critical micelle concentration （CMC）. Enhancement of PCP removal was observed at sub-CMCs. The presence of Tween 80 in the reaction mixture reduced enzyme inactivation which occurred through a combination of free radical attack and sorption by precipitated products. A simple first-order model was able to simulate time profiles for enzyme inactivation in the presence or absence of Tween 80. At supra-CMCs, the surfactant caused noticeable reductions in PCP removal, presumably through micelle partitioning of PCP which precluded the hydrophobic PCP molecule from interacting with the enzyme.     

基于综合水质标识指数和对应分析法的校园河道水质评价

以三峡大学的校园河道求索溪为研究对象,利用综合水质标识指数法确定求索溪水质类别,分析其水质时空变化规律,并利用对应分析法得出求索溪中不同监测点的主要污染因子.研究结果表明:求索溪整体的综合水质标识指数为7.423,整体水质为劣V类(地表水环境质量标准GB 3838-2002)且黑臭.从时间变化来看,求索溪4月份的水质最差,5月份次之,4、5月份所有监测点的水质都劣于V类且黑臭;8月份水质最好,水质为Ⅳ类;从空间分布来看,8个监测点综合水质标识指数均超过6.0,水质为劣V类,其中6号监测点的水质相对最好,监测点3号的水质相对最差;对应分析法得出求索溪的整体水体污染程度受总氮因子的影响最大,其次为总磷.该研究拟为求索溪及类似校园河道的水环境治理研究提供基础依据和参考.     

Effects of chitosan on growth of an aquatic plant (Hydrilla verticillata) in polluted waters with different chemical oxygen demands

Effects of chitosan on a submersed plant, Hydrilla verticillata, were investigated. Results indicated that H. venicillata could prevent ultrastructure phytotoxicities and oxidativereaction from polluted water with high chemical oxygen demand (COD). Superoxide dismutase (SOD) activity and malondialdehyde (MDA) contents in H. verticillata treated with 0.1% chitosan in wastewater increased with high COD (980 mg/L) and decreased with low COD (63 mg/L), respectively. Ultrastructural analysis showed that the stroma and grana of chloroplast basically remained normal. However, plant cells from the control experiment (untreated with chitosan) were vacuolated and the cell interval increased. The relict of protoplast moved to the center, with cells tending to disjoint. Our findings indicate that wastewater with high COD concentration can cause a substantial damage to submersed plant, nevertheless, chitosan probably could alleviate the membrane lipid peroxidization and ultrastructure phytotoxicities, and protect plant cells from stress of high COD concentration polluted water.     

Removal of cadmium using MnO2 loaded D301 resin

MnO2 loaded weak basic anion exchange resin D301 （Anion exchange resin, macroreticular weak basic styrene） as adsorbent has been prepared and applied to the removal of cadmium. The adsorption characteristics have been investigated with respect to effect of pH, equilibrium isotherms, removal kinetic data, and interference of the coexisting ions. The results indicated that the Cd^2＋ could be efficiently removed using MnO2 loaded D301 resin in the pH range of 3-8 from aqueous solutions with the co-existence of high concentration of alkali and alkaline-earth metals ions. The saturate adsorption capacity of the Cd^2＋ was 77.88 mg/g. The adsorption process followed the pseudo first-order kinetics. The equilibrium data obtained in this study accorded excellently with the Langmuir adsorption isotherm.     

Effect of coagulation pretreatment on the fouling of ultrafiltration membrane

The purpose of this study is to understand the effect and mechanism of preventing membrane fouling, by coagulation pretreatment, in terms of fractional component and molecular weight of natural organic matter （NOM）. A relatively higher molecular weight （MW） of hydrophobic compounds was responsible for a rapid decline in the ultrafiltration flux. Coagulation could effectively remove the hydrophobic organics, resulting in the increase of flux. It was found that a lower MW of neutral hydrophilic compounds, which could remove inadequately by coagulation, was responsible for the slow declining flux. The fluxes in the filtration of coagulated water and supernatant water were compared and the results showed that a lower MW of neutral hydrophilic compounds remained in the supernatant water after coagulation could be rejected by a membrane, resulting in fouling. It was also found that the coagulated flocs could absorb neutral hydrophilic compounds effectively. Therefore, with the coagulated flocs formed on the membrane surface, the flux decline could be improved.     

Penetration analysis of elements and bioleaching treatment of spent refractory for recycling

Acidithiobacillus ferrooxidans ATCC23270 and Acidithiobacillus thiooxidans TM-32 were used for bioleaching of spent refractories of aluminium and copper melting furnaces for their recycling.Firstly,penetration of elements into aluminium melting furnace refractory was investigated and it was found that up to 7 cm from surface was contaminated.Comparison on leaching efficiency by the strains ATCC23270 and TM-32 found that the strain ATCC23270 could treat larger amount of the refractories than the strain TM-32 could do.In the experiment of bioleaching of spent refractory aluminium melting furnace by the strain ATCC23270,high leaching efficiency were obtained on Al,Si,and Ca,and extremely low leaching performance was,however,shown on the rest of elements i.e.,Na,Mn,and Zn.Under the strain TM-32 use,relatively high leaching performance was recognized on Al,Si,Ca,Na,Mn,and Zn.In the experiment of bioleaching for spent refractory copper melting furnace,almost the same leaching trends were shown on Cu,Zn,Al,and Si under the strains ACTT23270 and TM-32 uses.     

Simultaneous removal of ammonium and phosphate by zeolite synthesized from coal fly ash as influenced by acid treatment

Zeolite synthesized from fly ash （ZFA） without modification is not efficient for the purification of NH4＋ and phosphate at low concentrations that occur in real effluents, despite the high potential removal capacity. To develop an effective technique to enhance the removal efficiency of ammonium and phosphate at low concentrations, ZFA was modified with acid treatment and the simultaneous removal of ammonium and phosphate in a wide range of concentration was investigated. It was seen that when compared with untreated ZFA, only the treatment by 0.01 mol/L of H2SO4 significantly improved the removal efficiency of ammonium at low initial concentrations. The behavior was well explained by the pH effect. Treatment by more concentrated H2SO4 led to the deterioration of the ZFA structure and a decrease in the cation exchange capacity. Treatment by 0.01 mol/L H2SO4 improved the removal efficiency of phosphate by ZFA at all initial P concentrations, while the treatment by concentrated H2SO4 （≥0.9 mol/L） resulted in a limited maximum phosphate immobilization capacity （PIC）. It was concluded that through a previous mild acid treatment （e.g. 0.01 mol/L of H2SO4）, ZFA can be used in the simultaneous removal of NH4＋ and P at low concentrations simulating real effluent.