Spatial and Temporal Variations in Trace Metal Concentrations in the Cockle, Austrovenus Stutchburyi from Otago, New Zealand

This is the first comprehensive study of sources of variation in metal concentrations within the whole tissues of a shallow burrowing, filter-feeding intertidal clam, Austrovenus stutchburyi. Samples were collected from 12 sites in April, August, November and February in 1993–1994 in the vicinity of Otago Harbour and Peninsula, New Zealand. Total tissue trace metal concentrations (μg g⁻¹ dry weight) were measured in individual animals for the essential metals : Mn, Cu, Zn, Ni and the non-essential Cr using trace-metal clean acid-digestion and ICP-OAES techniques. Average metal concentrations were 3–60 μg g⁻¹ for Cu, 40–118 μg g⁻¹ for Zn, 2–12 μg g⁻¹ for Mn, 5–35 μg g⁻¹ for Ni and 1–44 μg g⁻¹ for Cr. These levels decreased with body weight and differed amongst sites except for Cr in February (mid-summer). Highest concentrations occurred at sites close to a city (Dunedin) and within the central harbour region although the Cu, Zn, Ni and Cr concentrations did not correlate with the environmental gradient or season. At one coastal site, samples of both the blue mussel Mytilus galloprovincialis and cockles gave similar trends in trace metal levels. These results suggest that the cockle could be a useful trace metal biomonitor within NZ estuaries.     

Role of glycine on sulfuric acid-ammonia clusters formation: Transporter or participator

Glycine(Gly) is ubiquitous in the atmosphere and plays a vital role in new particle formation(NPF).However,the potential mechanism of its on sulfuric acid(SA)-ammonia(A)clusters formation under various atmospheric conditions is still ambiguous.Herein,a(Gly)_x·(SA)_y·(A)_z(z≤x+y≤3) multicomponent system was investigated by using density functional theory(DFT) combined with Atmospheric Cluster Dynamics Code(ACDC) at different temperatures and precursor concentrations.The results show that Gly,with one carboxyl(-COOH) and one amine(-NH_2) group,can interact strongly with SA and A in two directions through hydrogen bonds or proton transfer.Within the relevant range of atmospheric concentrations,Gly can enhance the formation rate of SA-A-based clusters,especially at low temperature,low [SA],and median [A].The enhancement(R) of Gly on NPF can be up to 340 at T=218.15 K,[SA]=10~4,[A]=10~9,and [Gly]=10~7 molecules/cm~3.In addition,the main growth paths of clusters show that Gly molecules participate into cluster formation in the initial stage and eventually leave the cluster by evaporation in subsequent cluster growth at low [Gly],it acts as an important "transporter" to connect the smaller and larger cluster.With the increase of [Gly],it acts as a "participator" directly participating in NPF.     

国土空间规划新时代旅游规划的定位与转型

我国已经迈入以国土空间规划引领“多规合一”的空间治理新时代,对各专项规划的管控约束性更严、技术性和衔接性要求更高。为此,本文重新审视了旅游规划的性质和地位,并基于产业专项性和空间融合性特征,将旅游规划分为战略规划、协调规划、发展规划和开发规划。以旅游发展规划为示例,提出了六大转型:规划理念从无限思维向边界思维、融合理念和空间思维转变,编制思路从甲方意志向市场导向转变,规划内容从大而全向专而精转变,技术路线从概念逻辑向空间逻辑转变,规划方式从封闭向开放转变,规划技术从缺乏技术到技术融合转变以期推动旅游规划衔接和融入新时代国土空间规划体系,进一步引领中国旅游产业的转型升级和高质量发展。     

新型生活污水处理装置研究

介绍了新型生活污水处理装置的工艺 ,影响装置处理效果的主要因素。     

餐饮泔水油及废动植物油下脚料深加工利用大有可为：介绍《国家级科技成果重点推广计划》高效益环保项目“利用餐饮泔水油及废动植物油生产油酸、甘油、硬脂酸”新工艺

综述了我国的餐饮泔水油及废油脂资源浪费、破坏环境现状，对比介绍了新工艺显著的经济及环保效益。     

浦东新区城市生态问题探析

以浦东新区为个案，提出了城市开发建设较为突出的城市平衡发展、河流治理、景观规划等方面的城市生态问题，并阐述了解决方法和对策。掌握并运用生态学原理，对于城市建设和管理具有重要意义。     

污水处理的新技术与新发展

介绍我国对水污染控制认识的发展和深化，阐述了污水生物处理方面的研究和新进展，包括在微生物方面的研究和新反应器、新工艺的发展。同时，讨论了新型、高效化学混凝剂和絮凝剂的开发成功，使化学法用于城市污水的处理成为可能。并提出任何一种新的处理工艺和反应器都各有其优缺点和适用条件，不能认为某一种就是最好，最先进的，可以无条件适用各种情况的。     

苏州新区经济与环境协调发展实证分析

重视环境保护规划 ,严把项目引进关 ,控制乡镇工业污染 ,增大环境保护投入 ,完善基础设施 ,严格环境管理是实现苏州新区经济与环境协调发展的主导因素。     

浦东新区城市生活污水处理现状及对策探讨

在对浦东新区生活污水处理现状进行分析的基础上，肯定了目前污水纳管处理和地理式生化处理并存的过滤性措施的作用，并提出了要提高生活污水处理率，完善污水管网收集系统，加强对住宅小区生活污水处理设施的管理等建议。     

浦东新区大气气溶胶中碳颗粒的分布规律

采用元素相关性分析方法，找出浦东新区大气气溶胶中碳颗粒的污染源，确证该区大气中碳颗粒主要来自煤的燃烧。同时初步找出浦东新区大气中碳颗粒污染的时空分布和粒径分布规律，为改善浦东 新区大气污染状况提供依据。