Effect of Adsorption of Metal Elements Ni and V on the Structure of Humin [PDF]
, 2023 BACKGROUNDBlack shales are mostly developed in special periods in geological history. They not only record the evolution characteristics of paleoenvironment, paleoclimate and paleontology, but also are carriers of organic matter, oil and gas and various ...
Jianping CHENG +5 more
core +1 more source
Research Progress on the Effect of Dissolved Organic Matter on the Environmental Behavior of Cadmium in Environmental Remediation [PDF]
With the rapid development of the economy and society and the continuous emission of cadmium (Cd), Cd pollution has become a major environmental problem faced by China and the rest of the world.
Bo WANG +8 more
core +1 more source
, 2018 海洋有机质的光谱分析已成为海洋碳循环的研究热点之一。本文从天然有机质吸收光谱和荧光光谱分析的基本原理入手,系统梳理了有机质光谱分析中容易被忽视的基本概念,讨论了过滤与保存方式、p H值、荧光内滤效应等对有机质光谱分析的影响。结合色氨酸、酪氨酸、腐殖酸及大量现场样品的实验结果,对吸收光谱和三维荧光光谱的不同解析方法进行了系统的分析与对比。基于在南海、西菲律宾海获取的现场调查数据,对于文献中常用的荧光指数(FI)、腐殖化指数(HIX)、自生源指数(BIX ...
徐静 +4 more
core
Insist on the Strategy of Forestry Sustainable Developmnet [PDF]
, 1999 该文分析比较了前人在杉木林和火力楠林两种林分的林冠、枯枝落叶层、土壤结构与肥力、土壤微生物等因素保持水土方面的研究成果,从战略上提出了长泰县林业可持续发展对策。The paper analyzes and makes comparison among the research achievements in water and soil conservation by leaves, defoliation layer,soil structure and fertility, soil ...
史大林, 洪海征, 黄璜
core
Effects of Kandelia candel Mangrove Restoration on Soil Physical, Chemical and Biochemical Parameters in Jiulong River Estuary [PDF]
, 2008 分别以光滩为对照，在青礁-白礁选取5年生、6年生和8年生秋茄人工林以及天然秋茄林为样地，在草埔头选取20年生和44年生秋茄人工林为样地，比较分析了福建九龙江口秋茄红树林恢复对潮滩土壤理化和生化性质的影响，旨在探索土壤参数随红树林植被发育的变化规律。 两地随着林龄的增加，土壤容重、pH和空隙水盐度有减小趋势。两地林龄对pH有极显著影响（p＜0.001），青礁-白礁光滩和天然林土壤pH分别为6.64和4.56。随深度增加，土壤容重增加，分行维数表层高于底层。从滩位变化上看，中滩含水量、空隙水盐度较高 ...
曹长青
core
Study on Existent Form of Mercury in Sediments of Miyun Reservoir,Beijng [PDF]
, 2005 在改进Tessier方法的基础上,利用冷原子吸收对北京密云水库沉积物中汞的形态进行研究,发现密云水库沉积物的总汞含量较高,沉积物中的汞主要以气态汞、有机汞和硫化物汞的形式存在,生物可以直接利用的汞较低,但一些目前不能直接利用的汞在一定条件下可以转化为可利用的汞,需要对此加以关注。On the bases of modified Tessier method,the existent forms of mercury in sediments of Miyun reservoir,Beijing were
丁振华, 庄敏, 王文华, 贾洪武
core
The research of micro-electrolysis process composed of discarded iron slag and coke pretreating landfill leachate [PDF]
, 2006 ［中文文摘］研究表明,废铁屑和焦炭微电解是预处理垃圾渗滤液的一种有效方法,可去除垃圾渗滤液COD、色度和腐殖酸等污染物质,改善其可生化性、降低负荷,为后续生化处理创造良好的条件。通过静态正交实验确定废铁屑和焦炭最佳投加体积比为1∶3;最佳反应pH值为4;动态实验中,反应时间为1 h时,COD和色度去除率分别高达68%和91%;BOD/COD从0.3提高到0.5左右。［英文文摘］The study shows that micro-electrolysis process is an effective ...
严滨(三达膜科技（厦门）有限公司) +5 more
core
Distribution and Species of Mercury in Water and Sediments from Huangpu River [PDF]
, 2005 黄浦江江水的总汞、溶解态汞和颗粒汞含量变化较大,其平均值分别为(0.4±0.44)ng/mL、(0.27±0.42)ng/mL和(0.13±0.10)ng/mL,江水中汞以溶解态汞为主.黄浦江沉积物的总汞含量为70.52ng/g~387.30ng/g,平均汞含量为(204.03±97.41)ng/g.江水和沉积物中汞的沿江分布具有中游高,上游和下游低的特征,西渡—南浦大桥江段汞含量为整个黄浦江最高的江段,汞的分布特征与两岸工农业布局相一致.沉积物总汞与有机质显著相关 ...
丁振华 +4 more
core
, 2006 针对海洋沉积环境样品DNA 提取中的腐殖酸去除难题，采取先脱除腐殖酸再提取DNA 的策略，进行了海洋沉积物DNA 提取前的简易脱腐方法研究。依据腐殖酸的理化性质，遴选出由Tris-HCl、EDTA、Na4P2O7、NaCl、PVP、Triton X-100 及脱脂奶粉组成脱腐缓冲液，有效地脱除了腐殖酸。之后采用温和的溶菌酶-蛋白酶K-SDS 直接裂解法，获取了大片段（分子量21kb 以上）可进行rpoB 基因PCR 扩增的海洋沉积物DNA，为海洋沉积环 境分子生态学研究与海洋生物活性物质开发奠定了基础 ...
傅莲英, 席峰, 王桂忠, 郑天凌
core
Determination of Magnesium Isotopic Composition of Plant Chlorophylls Based on HPLC and MC-ICP-MS [PDF]
The accurate determination of magnesium isotope values of chlorophyll a and chlorophyll b is particularly important for the study of magnesium biosynthesis pathways during chlorophyll formation. HPLC is required before MC-ICP-MS can be utilized, but HPLC
Hongyu ZHANG +5 more
core +1 more source