Migration and transformation of heavy metals in hyperaccumulators during the thermal treatment: a review

Environmental Science and Pollution Research - The pollution of heavy metals (HMs) in the soil has become one of the important factors affecting the national environment and human health....     

Biodegradable microplastics (BMPs): a new cause for concern?

Environmental Science and Pollution Research - With the increasingly serious pollution of plastics, biodegradable plastics (BDPs) have attracted attention as a new material that can replace...     

Removal of SO2 from smelting flue gas by using copper tailings with MnSO4: factors optimization by response surface methodology

Environmental Science and Pollution Research - The abatement of SO2 and the utilization of copper tailings are identified as two attention-attracting environmental issues in the copper smelter. In...     

How air pollution lowers the domestic value-added ratio in exports: an empirical study of China

Environmental Science and Pollution Research - This paper analyzes the theoretical mechanism and transmission channel for the impact of air pollution on firms’ domestic value-added ratio...     

Uptake and distributions of polycyclic aromatic hydrocarbons in cultivated plants around an E-waste disposal site in Southern China

Environmental Science and Pollution Research - Polycyclic aromatic hydrocarbons (PAHs) in air, soil, and cultivated plants at e-waste disposal sites in Taizhou, Zhejiang Province, were determined...     

Characterization of a novel marine aerobic denitrifier Vibrio spp. AD2 for efficient nitrate reduction without nitrite accumulation

Environmental Science and Pollution Research - Aerobic denitrifiers have the potential to reduce nitrate in polluted water under aerobic conditions. A salt-tolerant aerobic denitrifier was newly...     

Occurrence,source apportionment,and carcinogenic risk assessment of polycyclic aromatic hydrocarbons in urban road dusts in Shanghai

Environmental Science and Pollution Research - Polycyclic aromatic hydrocarbons (PAHs), as a class of important environmental pollutants, have received considerable concern due to their widespread...     

厌氧氨氧化启动过程及微生物群落结构特征

采用UASB反应器以体积比1∶2接种实验室培养的具有厌氧氨氧化(ANAMMOX)功能的厌氧污泥和城市污水厂的好氧污泥,耗时17 d成功启动ANAMMOX反应,启动阶段分为菌体水解期、活性提高期和稳定运行期.稳定运行后,逐步提高反应器容积负荷富集厌氧氨氧化菌,当容积负荷由0.10 kg·(m~3·d)~(-1)增至0.44 kg·(m~3·d)~(-1)时,总氮(TN)去除负荷也随之由0.09 kg·(m~3·d)~(-1)提高到0.42 kg·(m~3·d)~(-1),反应器污泥逐渐由浅红色加深,粒径大于0.2 mm的污泥所占比例由10.90%增至38.37%.采用高通量测序对接种污泥和负荷提高期的污泥进行检测,其中绿曲挠菌门(Chloroflexi)、变形菌门(Proteobacteria)、WWE3门、放线菌门(Actinobacteria)、浮霉菌门(Planctomycetes)等占据主导.随着厌氧氨氧化菌富集程度的增大,脱氮功能菌中的变形菌门所占比例逐渐减少,从21.60%降至14.20%,而浮霉菌门随之增多,相对丰度由0.73%升至15.50%.当反应器的容积负荷增到0.44 kg·(m~3·d)~(-1)时,浮霉菌门中,Candidatus Brocadia属、Candidatus Jettenia属和Candidatus Kuenenia属是主要菌属,Candidatus Brocadia属占13.40%,是主要的厌氧氨氧化菌属.     

供水管网铁释放的影响因素相对重要性分析

供水管网的铁释放问题近年来日益受到关注.影响供水管网铁释放的因素众多,本研究选取了pH、溶解氧(DO)、碱度(Alk)、硬度、氯离子(Cl~-)、硫酸根(SO_4~(2-))、温度(T)和水力停留时间(HRT)这8个影响因素,利用逐步回归和偏相关分析,建立了铁释放的非线性幂指数模型,并用标准化回归系数和偏相关系数比较了这些因素的相对重要性.结果表明,铁释放模型拟合效果良好;用标准化回归系数衡量影响因素相对重要性时,SO_4~(2-)、HRT、Cl~-和T是相对重要的因素,相对重要性排序为SO_4~(2-)≈HRTCl~-T;用偏相关系数衡量时,HRT、SO_4~(2-)、Alk、Cl~-和T是相对重要的因素,排序为HRTSO_4~(2-)AlkCl~-T.综合两种系数的分析结果,HRT、SO_4~(2-)和Cl~-是本研究条件下相对重要的因素,T和Alk的相对重要性视实际情况变动.     

陕北黄土丘陵区不同土地利用方式下土壤碳剖面分布特征

黄土高原土层深厚,土壤剖面碳存储受土地利用方式影响明显.为探讨不同土地利用方式对深层土壤碳分布的影响,研究了人工经济林地(陕北米脂)、退耕还林地(神木)和防风固沙林地(榆林榆阳区)0~20.0 m土壤有机碳(SOC)和无机碳(SIC)的分布特征和差异.结果表明,在不同土地利用方式下SOC含量:矮化枣树(2.00 g·kg~(-1))未矮化枣树(1.54 g·kg~(-1))柠条林(0.97 g·kg~(-1))退化人工草地(0.81 g·kg~(-1))樟子松林(0.70 g·kg~(-1))荒草地(0.45 g·kg~(-1)),且各剖面之间SOC含量存在显著性差异(P0.05).在不同土地利用方式下SIC含量:矮化枣树(11.66 g·kg~(-1))≥未矮化枣树(11.59g·kg~(-1))柠条林(9.62 g·kg~(-1))退化人工草地(8.07 g·kg~(-1))樟子松林(4.32 g·kg~(-1))荒草地(0.47 g·kg~(-1));人工经济林和退耕还林(草)样地内所有土壤剖面之间SIC含量无显著性差异;人工经济林、退耕还林(草)剖面和防风固沙林地剖面SIC含量存在显著性差异(P0.05).矮化枣树、未矮化枣树、柠条林、退化人工草地、樟子松林和荒草地土壤剖面无机碳密度分别是有机碳密度的6.19、7.71、10.80、10.78、5.91和1.03倍.综上可见,不同土地利用方式之间土壤碳储量存在明显差异,无机碳的含量远高于有机碳.